diff options
Diffstat (limited to 'drivers/hwmon/pmbus/pmbus_core.c')
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus_core.c | 2007 |
1 files changed, 1590 insertions, 417 deletions
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index a420877ba533..be6d05def115 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -7,6 +7,8 @@ */ #include <linux/debugfs.h> +#include <linux/delay.h> +#include <linux/dcache.h> #include <linux/kernel.h> #include <linux/math64.h> #include <linux/module.h> @@ -16,10 +18,11 @@ #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> -#include <linux/jiffies.h> #include <linux/pmbus.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> +#include <linux/of.h> +#include <linux/thermal.h> #include "pmbus.h" /* @@ -27,22 +30,17 @@ * with each call to krealloc */ #define PMBUS_ATTR_ALLOC_SIZE 32 +#define PMBUS_NAME_SIZE 24 /* - * Index into status register array, per status register group + * The type of operation used for picking the delay between + * successive pmbus operations. */ -#define PB_STATUS_BASE 0 -#define PB_STATUS_VOUT_BASE (PB_STATUS_BASE + PMBUS_PAGES) -#define PB_STATUS_IOUT_BASE (PB_STATUS_VOUT_BASE + PMBUS_PAGES) -#define PB_STATUS_FAN_BASE (PB_STATUS_IOUT_BASE + PMBUS_PAGES) -#define PB_STATUS_FAN34_BASE (PB_STATUS_FAN_BASE + PMBUS_PAGES) -#define PB_STATUS_TEMP_BASE (PB_STATUS_FAN34_BASE + PMBUS_PAGES) -#define PB_STATUS_INPUT_BASE (PB_STATUS_TEMP_BASE + PMBUS_PAGES) -#define PB_STATUS_VMON_BASE (PB_STATUS_INPUT_BASE + 1) - -#define PB_NUM_STATUS_REG (PB_STATUS_VMON_BASE + 1) +#define PMBUS_OP_WRITE BIT(0) +#define PMBUS_OP_PAGE_CHANGE BIT(1) -#define PMBUS_NAME_SIZE 24 +static int wp = -1; +module_param(wp, int, 0444); struct pmbus_sensor { struct pmbus_sensor *next; @@ -54,8 +52,7 @@ struct pmbus_sensor { enum pmbus_sensor_classes class; /* sensor class */ bool update; /* runtime sensor update needed */ bool convert; /* Whether or not to apply linear/vid/direct */ - int data; /* Sensor data. - Negative if there was a read error */ + int data; /* Sensor data; negative if there was a read error */ }; #define to_pmbus_sensor(_attr) \ container_of(_attr, struct pmbus_sensor, attribute) @@ -77,12 +74,30 @@ struct pmbus_label { #define to_pmbus_label(_attr) \ container_of(_attr, struct pmbus_label, attribute) +/* Macros for converting between sensor index and register/page/status mask */ + +#define PB_STATUS_MASK 0xffff +#define PB_REG_SHIFT 16 +#define PB_REG_MASK 0x3ff +#define PB_PAGE_SHIFT 26 +#define PB_PAGE_MASK 0x3f + +#define pb_reg_to_index(page, reg, mask) (((page) << PB_PAGE_SHIFT) | \ + ((reg) << PB_REG_SHIFT) | (mask)) + +#define pb_index_to_page(index) (((index) >> PB_PAGE_SHIFT) & PB_PAGE_MASK) +#define pb_index_to_reg(index) (((index) >> PB_REG_SHIFT) & PB_REG_MASK) +#define pb_index_to_mask(index) ((index) & PB_STATUS_MASK) + struct pmbus_data { struct device *dev; struct device *hwmon_dev; + struct regulator_dev **rdevs; u32 flags; /* from platform data */ + u8 revision; /* The PMBus revision the device is compliant with */ + int exponent[PMBUS_PAGES]; /* linear mode: exponent for output voltages */ @@ -92,25 +107,21 @@ struct pmbus_data { int num_attributes; struct attribute_group group; const struct attribute_group **groups; - struct dentry *debugfs; /* debugfs device directory */ struct pmbus_sensor *sensors; struct mutex update_lock; - bool valid; - unsigned long last_updated; /* in jiffies */ - - /* - * A single status register covers multiple attributes, - * so we keep them all together. - */ - u16 status[PB_NUM_STATUS_REG]; bool has_status_word; /* device uses STATUS_WORD register */ int (*read_status)(struct i2c_client *client, int page); s16 currpage; /* current page, -1 for unknown/unset */ s16 currphase; /* current phase, 0xff for all, -1 for unknown/unset */ + + int vout_low[PMBUS_PAGES]; /* voltage low margin */ + int vout_high[PMBUS_PAGES]; /* voltage high margin */ + + ktime_t next_access_backoff; /* Wait until at least this time */ }; struct pmbus_debugfs_entry { @@ -143,10 +154,49 @@ static const int pmbus_fan_command_registers[] = { void pmbus_clear_cache(struct i2c_client *client) { struct pmbus_data *data = i2c_get_clientdata(client); + struct pmbus_sensor *sensor; + + for (sensor = data->sensors; sensor; sensor = sensor->next) + sensor->data = -ENODATA; +} +EXPORT_SYMBOL_NS_GPL(pmbus_clear_cache, "PMBUS"); + +void pmbus_set_update(struct i2c_client *client, u8 reg, bool update) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + struct pmbus_sensor *sensor; + + for (sensor = data->sensors; sensor; sensor = sensor->next) + if (sensor->reg == reg) + sensor->update = update; +} +EXPORT_SYMBOL_NS_GPL(pmbus_set_update, "PMBUS"); + +/* Some chips need a delay between accesses. */ +static void pmbus_wait(struct i2c_client *client) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + s64 delay = ktime_us_delta(data->next_access_backoff, ktime_get()); + + if (delay > 0) + fsleep(delay); +} + +/* Sets the last operation timestamp for pmbus_wait */ +static void pmbus_update_ts(struct i2c_client *client, int op) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + const struct pmbus_driver_info *info = data->info; + int delay = info->access_delay; + + if (op & PMBUS_OP_WRITE) + delay = max(delay, info->write_delay); + if (op & PMBUS_OP_PAGE_CHANGE) + delay = max(delay, info->page_change_delay); - data->valid = false; + if (delay > 0) + data->next_access_backoff = ktime_add_us(ktime_get(), delay); } -EXPORT_SYMBOL_GPL(pmbus_clear_cache); int pmbus_set_page(struct i2c_client *client, int page, int phase) { @@ -158,11 +208,15 @@ int pmbus_set_page(struct i2c_client *client, int page, int phase) if (!(data->info->func[page] & PMBUS_PAGE_VIRTUAL) && data->info->pages > 1 && page != data->currpage) { + pmbus_wait(client); rv = i2c_smbus_write_byte_data(client, PMBUS_PAGE, page); + pmbus_update_ts(client, PMBUS_OP_WRITE | PMBUS_OP_PAGE_CHANGE); if (rv < 0) return rv; + pmbus_wait(client); rv = i2c_smbus_read_byte_data(client, PMBUS_PAGE); + pmbus_update_ts(client, 0); if (rv < 0) return rv; @@ -173,8 +227,10 @@ int pmbus_set_page(struct i2c_client *client, int page, int phase) if (data->info->phases[page] && data->currphase != phase && !(data->info->func[page] & PMBUS_PHASE_VIRTUAL)) { + pmbus_wait(client); rv = i2c_smbus_write_byte_data(client, PMBUS_PHASE, phase); + pmbus_update_ts(client, PMBUS_OP_WRITE); if (rv) return rv; } @@ -182,7 +238,7 @@ int pmbus_set_page(struct i2c_client *client, int page, int phase) return 0; } -EXPORT_SYMBOL_GPL(pmbus_set_page); +EXPORT_SYMBOL_NS_GPL(pmbus_set_page, "PMBUS"); int pmbus_write_byte(struct i2c_client *client, int page, u8 value) { @@ -192,9 +248,13 @@ int pmbus_write_byte(struct i2c_client *client, int page, u8 value) if (rv < 0) return rv; - return i2c_smbus_write_byte(client, value); + pmbus_wait(client); + rv = i2c_smbus_write_byte(client, value); + pmbus_update_ts(client, PMBUS_OP_WRITE); + + return rv; } -EXPORT_SYMBOL_GPL(pmbus_write_byte); +EXPORT_SYMBOL_NS_GPL(pmbus_write_byte, "PMBUS"); /* * _pmbus_write_byte() is similar to pmbus_write_byte(), but checks if @@ -223,10 +283,13 @@ int pmbus_write_word_data(struct i2c_client *client, int page, u8 reg, if (rv < 0) return rv; - return i2c_smbus_write_word_data(client, reg, word); -} -EXPORT_SYMBOL_GPL(pmbus_write_word_data); + pmbus_wait(client); + rv = i2c_smbus_write_word_data(client, reg, word); + pmbus_update_ts(client, PMBUS_OP_WRITE); + return rv; +} +EXPORT_SYMBOL_NS_GPL(pmbus_write_word_data, "PMBUS"); static int pmbus_write_virt_reg(struct i2c_client *client, int page, int reg, u16 word) @@ -272,6 +335,42 @@ static int _pmbus_write_word_data(struct i2c_client *client, int page, int reg, return pmbus_write_word_data(client, page, reg, word); } +/* + * _pmbus_write_byte_data() is similar to pmbus_write_byte_data(), but checks if + * a device specific mapping function exists and calls it if necessary. + */ +static int _pmbus_write_byte_data(struct i2c_client *client, int page, int reg, u8 value) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + const struct pmbus_driver_info *info = data->info; + int status; + + if (info->write_byte_data) { + status = info->write_byte_data(client, page, reg, value); + if (status != -ENODATA) + return status; + } + return pmbus_write_byte_data(client, page, reg, value); +} + +/* + * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if + * a device specific mapping function exists and calls it if necessary. + */ +static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + const struct pmbus_driver_info *info = data->info; + int status; + + if (info->read_byte_data) { + status = info->read_byte_data(client, page, reg); + if (status != -ENODATA) + return status; + } + return pmbus_read_byte_data(client, page, reg); +} + int pmbus_update_fan(struct i2c_client *client, int page, int id, u8 config, u8 mask, u16 command) { @@ -279,15 +378,15 @@ int pmbus_update_fan(struct i2c_client *client, int page, int id, int rv; u8 to; - from = pmbus_read_byte_data(client, page, - pmbus_fan_config_registers[id]); + from = _pmbus_read_byte_data(client, page, + pmbus_fan_config_registers[id]); if (from < 0) return from; to = (from & ~mask) | (config & mask); if (to != from) { - rv = pmbus_write_byte_data(client, page, - pmbus_fan_config_registers[id], to); + rv = _pmbus_write_byte_data(client, page, + pmbus_fan_config_registers[id], to); if (rv < 0) return rv; } @@ -295,7 +394,7 @@ int pmbus_update_fan(struct i2c_client *client, int page, int id, return _pmbus_write_word_data(client, page, pmbus_fan_command_registers[id], command); } -EXPORT_SYMBOL_GPL(pmbus_update_fan); +EXPORT_SYMBOL_NS_GPL(pmbus_update_fan, "PMBUS"); int pmbus_read_word_data(struct i2c_client *client, int page, int phase, u8 reg) { @@ -305,9 +404,13 @@ int pmbus_read_word_data(struct i2c_client *client, int page, int phase, u8 reg) if (rv < 0) return rv; - return i2c_smbus_read_word_data(client, reg); + pmbus_wait(client); + rv = i2c_smbus_read_word_data(client, reg); + pmbus_update_ts(client, 0); + + return rv; } -EXPORT_SYMBOL_GPL(pmbus_read_word_data); +EXPORT_SYMBOL_NS_GPL(pmbus_read_word_data, "PMBUS"); static int pmbus_read_virt_reg(struct i2c_client *client, int page, int reg) { @@ -364,9 +467,13 @@ int pmbus_read_byte_data(struct i2c_client *client, int page, u8 reg) if (rv < 0) return rv; - return i2c_smbus_read_byte_data(client, reg); + pmbus_wait(client); + rv = i2c_smbus_read_byte_data(client, reg); + pmbus_update_ts(client, 0); + + return rv; } -EXPORT_SYMBOL_GPL(pmbus_read_byte_data); +EXPORT_SYMBOL_NS_GPL(pmbus_read_byte_data, "PMBUS"); int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg, u8 value) { @@ -376,9 +483,13 @@ int pmbus_write_byte_data(struct i2c_client *client, int page, u8 reg, u8 value) if (rv < 0) return rv; - return i2c_smbus_write_byte_data(client, reg, value); + pmbus_wait(client); + rv = i2c_smbus_write_byte_data(client, reg, value); + pmbus_update_ts(client, PMBUS_OP_WRITE); + + return rv; } -EXPORT_SYMBOL_GPL(pmbus_write_byte_data); +EXPORT_SYMBOL_NS_GPL(pmbus_write_byte_data, "PMBUS"); int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg, u8 mask, u8 value) @@ -386,35 +497,33 @@ int pmbus_update_byte_data(struct i2c_client *client, int page, u8 reg, unsigned int tmp; int rv; - rv = pmbus_read_byte_data(client, page, reg); + rv = _pmbus_read_byte_data(client, page, reg); if (rv < 0) return rv; tmp = (rv & ~mask) | (value & mask); if (tmp != rv) - rv = pmbus_write_byte_data(client, page, reg, tmp); + rv = _pmbus_write_byte_data(client, page, reg, tmp); return rv; } -EXPORT_SYMBOL_GPL(pmbus_update_byte_data); +EXPORT_SYMBOL_NS_GPL(pmbus_update_byte_data, "PMBUS"); -/* - * _pmbus_read_byte_data() is similar to pmbus_read_byte_data(), but checks if - * a device specific mapping function exists and calls it if necessary. - */ -static int _pmbus_read_byte_data(struct i2c_client *client, int page, int reg) +static int pmbus_read_block_data(struct i2c_client *client, int page, u8 reg, + char *data_buf) { - struct pmbus_data *data = i2c_get_clientdata(client); - const struct pmbus_driver_info *info = data->info; - int status; + int rv; - if (info->read_byte_data) { - status = info->read_byte_data(client, page, reg); - if (status != -ENODATA) - return status; - } - return pmbus_read_byte_data(client, page, reg); + rv = pmbus_set_page(client, page, 0xff); + if (rv < 0) + return rv; + + pmbus_wait(client); + rv = i2c_smbus_read_block_data(client, reg, data_buf); + pmbus_update_ts(client, 0); + + return rv; } static struct pmbus_sensor *pmbus_find_sensor(struct pmbus_data *data, int page, @@ -451,8 +560,8 @@ static int pmbus_get_fan_rate(struct i2c_client *client, int page, int id, return s->data; } - config = pmbus_read_byte_data(client, page, - pmbus_fan_config_registers[id]); + config = _pmbus_read_byte_data(client, page, + pmbus_fan_config_registers[id]); if (config < 0) return config; @@ -470,14 +579,14 @@ int pmbus_get_fan_rate_device(struct i2c_client *client, int page, int id, { return pmbus_get_fan_rate(client, page, id, mode, false); } -EXPORT_SYMBOL_GPL(pmbus_get_fan_rate_device); +EXPORT_SYMBOL_NS_GPL(pmbus_get_fan_rate_device, "PMBUS"); int pmbus_get_fan_rate_cached(struct i2c_client *client, int page, int id, enum pmbus_fan_mode mode) { return pmbus_get_fan_rate(client, page, id, mode, true); } -EXPORT_SYMBOL_GPL(pmbus_get_fan_rate_cached); +EXPORT_SYMBOL_NS_GPL(pmbus_get_fan_rate_cached, "PMBUS"); static void pmbus_clear_fault_page(struct i2c_client *client, int page) { @@ -492,7 +601,7 @@ void pmbus_clear_faults(struct i2c_client *client) for (i = 0; i < data->info->pages; i++) pmbus_clear_fault_page(client, i); } -EXPORT_SYMBOL_GPL(pmbus_clear_faults); +EXPORT_SYMBOL_NS_GPL(pmbus_clear_faults, "PMBUS"); static int pmbus_check_status_cml(struct i2c_client *client) { @@ -519,7 +628,10 @@ static bool pmbus_check_register(struct i2c_client *client, rv = func(client, page, reg); if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) rv = pmbus_check_status_cml(client); - pmbus_clear_fault_page(client, -1); + if (rv < 0 && (data->flags & PMBUS_READ_STATUS_AFTER_FAILED_CHECK)) + data->read_status(client, -1); + if (reg < PMBUS_VIRT_BASE) + pmbus_clear_fault_page(client, -1); return rv >= 0; } @@ -544,13 +656,29 @@ bool pmbus_check_byte_register(struct i2c_client *client, int page, int reg) { return pmbus_check_register(client, _pmbus_read_byte_data, page, reg); } -EXPORT_SYMBOL_GPL(pmbus_check_byte_register); +EXPORT_SYMBOL_NS_GPL(pmbus_check_byte_register, "PMBUS"); bool pmbus_check_word_register(struct i2c_client *client, int page, int reg) { return pmbus_check_register(client, __pmbus_read_word_data, page, reg); } -EXPORT_SYMBOL_GPL(pmbus_check_word_register); +EXPORT_SYMBOL_NS_GPL(pmbus_check_word_register, "PMBUS"); + +static bool __maybe_unused pmbus_check_block_register(struct i2c_client *client, + int page, int reg) +{ + int rv; + struct pmbus_data *data = i2c_get_clientdata(client); + char data_buf[I2C_SMBUS_BLOCK_MAX + 2]; + + rv = pmbus_read_block_data(client, page, reg, data_buf); + if (rv >= 0 && !(data->flags & PMBUS_SKIP_STATUS_CHECK)) + rv = pmbus_check_status_cml(client); + if (rv < 0 && (data->flags & PMBUS_READ_STATUS_AFTER_FAILED_CHECK)) + data->read_status(client, -1); + pmbus_clear_fault_page(client, -1); + return rv >= 0; +} const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client) { @@ -558,86 +686,107 @@ const struct pmbus_driver_info *pmbus_get_driver_info(struct i2c_client *client) return data->info; } -EXPORT_SYMBOL_GPL(pmbus_get_driver_info); - -static struct _pmbus_status { - u32 func; - u16 base; - u16 reg; -} pmbus_status[] = { - { PMBUS_HAVE_STATUS_VOUT, PB_STATUS_VOUT_BASE, PMBUS_STATUS_VOUT }, - { PMBUS_HAVE_STATUS_IOUT, PB_STATUS_IOUT_BASE, PMBUS_STATUS_IOUT }, - { PMBUS_HAVE_STATUS_TEMP, PB_STATUS_TEMP_BASE, - PMBUS_STATUS_TEMPERATURE }, - { PMBUS_HAVE_STATUS_FAN12, PB_STATUS_FAN_BASE, PMBUS_STATUS_FAN_12 }, - { PMBUS_HAVE_STATUS_FAN34, PB_STATUS_FAN34_BASE, PMBUS_STATUS_FAN_34 }, -}; +EXPORT_SYMBOL_NS_GPL(pmbus_get_driver_info, "PMBUS"); -static struct pmbus_data *pmbus_update_device(struct device *dev) +static int pmbus_get_status(struct i2c_client *client, int page, int reg) { - struct i2c_client *client = to_i2c_client(dev->parent); struct pmbus_data *data = i2c_get_clientdata(client); - const struct pmbus_driver_info *info = data->info; - struct pmbus_sensor *sensor; - - mutex_lock(&data->update_lock); - if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { - int i, j; - - for (i = 0; i < info->pages; i++) { - data->status[PB_STATUS_BASE + i] - = data->read_status(client, i); - for (j = 0; j < ARRAY_SIZE(pmbus_status); j++) { - struct _pmbus_status *s = &pmbus_status[j]; - - if (!(info->func[i] & s->func)) - continue; - data->status[s->base + i] - = _pmbus_read_byte_data(client, i, - s->reg); - } - } + int status; - if (info->func[0] & PMBUS_HAVE_STATUS_INPUT) - data->status[PB_STATUS_INPUT_BASE] - = _pmbus_read_byte_data(client, 0, - PMBUS_STATUS_INPUT); - - if (info->func[0] & PMBUS_HAVE_STATUS_VMON) - data->status[PB_STATUS_VMON_BASE] - = _pmbus_read_byte_data(client, 0, - PMBUS_VIRT_STATUS_VMON); - - for (sensor = data->sensors; sensor; sensor = sensor->next) { - if (!data->valid || sensor->update) - sensor->data - = _pmbus_read_word_data(client, - sensor->page, - sensor->phase, - sensor->reg); - } + switch (reg) { + case PMBUS_STATUS_WORD: + status = data->read_status(client, page); + break; + default: + status = _pmbus_read_byte_data(client, page, reg); + break; + } + if (status < 0) pmbus_clear_faults(client); - data->last_updated = jiffies; - data->valid = 1; + return status; +} + +static void pmbus_update_sensor_data(struct i2c_client *client, struct pmbus_sensor *sensor) +{ + if (sensor->data < 0 || sensor->update) + sensor->data = _pmbus_read_word_data(client, sensor->page, + sensor->phase, sensor->reg); +} + +/* + * Convert ieee754 sensor values to milli- or micro-units + * depending on sensor type. + * + * ieee754 data format: + * bit 15: sign + * bit 10..14: exponent + * bit 0..9: mantissa + * exponent=0: + * v=(−1)^signbit * 2^(−14) * 0.significantbits + * exponent=1..30: + * v=(−1)^signbit * 2^(exponent - 15) * 1.significantbits + * exponent=31: + * v=NaN + * + * Add the number mantissa bits into the calculations for simplicity. + * To do that, add '10' to the exponent. By doing that, we can just add + * 0x400 to normal values and get the expected result. + */ +static long pmbus_reg2data_ieee754(struct pmbus_data *data, + struct pmbus_sensor *sensor) +{ + int exponent; + bool sign; + long val; + + /* only support half precision for now */ + sign = sensor->data & 0x8000; + exponent = (sensor->data >> 10) & 0x1f; + val = sensor->data & 0x3ff; + + if (exponent == 0) { /* subnormal */ + exponent = -(14 + 10); + } else if (exponent == 0x1f) { /* NaN, convert to min/max */ + exponent = 0; + val = 65504; + } else { + exponent -= (15 + 10); /* normal */ + val |= 0x400; } - mutex_unlock(&data->update_lock); - return data; + + /* scale result to milli-units for all sensors except fans */ + if (sensor->class != PSC_FAN) + val = val * 1000L; + + /* scale result to micro-units for power sensors */ + if (sensor->class == PSC_POWER) + val = val * 1000L; + + if (exponent >= 0) + val <<= exponent; + else + val >>= -exponent; + + if (sign) + val = -val; + + return val; } /* * Convert linear sensor values to milli- or micro-units * depending on sensor type. */ -static long pmbus_reg2data_linear(struct pmbus_data *data, - struct pmbus_sensor *sensor) +static s64 pmbus_reg2data_linear(struct pmbus_data *data, + struct pmbus_sensor *sensor) { s16 exponent; s32 mantissa; - long val; + s64 val; if (sensor->class == PSC_VOLTAGE_OUT) { /* LINEAR16 */ exponent = data->exponent[sensor->page]; - mantissa = (u16) sensor->data; + mantissa = (u16)sensor->data; } else { /* LINEAR11 */ exponent = ((s16)sensor->data) >> 11; mantissa = ((s16)((sensor->data & 0x7ff) << 5)) >> 5; @@ -647,11 +796,11 @@ static long pmbus_reg2data_linear(struct pmbus_data *data, /* scale result to milli-units for all sensors except fans */ if (sensor->class != PSC_FAN) - val = val * 1000L; + val = val * 1000LL; /* scale result to micro-units for power sensors */ if (sensor->class == PSC_POWER) - val = val * 1000L; + val = val * 1000LL; if (exponent >= 0) val <<= exponent; @@ -665,8 +814,8 @@ static long pmbus_reg2data_linear(struct pmbus_data *data, * Convert direct sensor values to milli- or micro-units * depending on sensor type. */ -static long pmbus_reg2data_direct(struct pmbus_data *data, - struct pmbus_sensor *sensor) +static s64 pmbus_reg2data_direct(struct pmbus_data *data, + struct pmbus_sensor *sensor) { s64 b, val = (s16)sensor->data; s32 m, R; @@ -702,15 +851,15 @@ static long pmbus_reg2data_direct(struct pmbus_data *data, } val = div_s64(val - b, m); - return clamp_val(val, LONG_MIN, LONG_MAX); + return val; } /* * Convert VID sensor values to milli- or micro-units * depending on sensor type. */ -static long pmbus_reg2data_vid(struct pmbus_data *data, - struct pmbus_sensor *sensor) +static s64 pmbus_reg2data_vid(struct pmbus_data *data, + struct pmbus_sensor *sensor) { long val = sensor->data; long rv = 0; @@ -740,9 +889,9 @@ static long pmbus_reg2data_vid(struct pmbus_data *data, return rv; } -static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) +static s64 pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) { - long val; + s64 val; if (!sensor->convert) return sensor->data; @@ -754,6 +903,9 @@ static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) case vid: val = pmbus_reg2data_vid(data, sensor); break; + case ieee754: + val = pmbus_reg2data_ieee754(data, sensor); + break; case linear: default: val = pmbus_reg2data_linear(data, sensor); @@ -762,11 +914,75 @@ static long pmbus_reg2data(struct pmbus_data *data, struct pmbus_sensor *sensor) return val; } -#define MAX_MANTISSA (1023 * 1000) -#define MIN_MANTISSA (511 * 1000) +#define MAX_IEEE_MANTISSA (0x7ff * 1000) +#define MIN_IEEE_MANTISSA (0x400 * 1000) + +static u16 pmbus_data2reg_ieee754(struct pmbus_data *data, + struct pmbus_sensor *sensor, long val) +{ + u16 exponent = (15 + 10); + long mantissa; + u16 sign = 0; + + /* simple case */ + if (val == 0) + return 0; + + if (val < 0) { + sign = 0x8000; + val = -val; + } + + /* Power is in uW. Convert to mW before converting. */ + if (sensor->class == PSC_POWER) + val = DIV_ROUND_CLOSEST(val, 1000L); + + /* + * For simplicity, convert fan data to milli-units + * before calculating the exponent. + */ + if (sensor->class == PSC_FAN) + val = val * 1000; + + /* Reduce large mantissa until it fits into 10 bit */ + while (val > MAX_IEEE_MANTISSA && exponent < 30) { + exponent++; + val >>= 1; + } + /* + * Increase small mantissa to generate valid 'normal' + * number + */ + while (val < MIN_IEEE_MANTISSA && exponent > 1) { + exponent--; + val <<= 1; + } + + /* Convert mantissa from milli-units to units */ + mantissa = DIV_ROUND_CLOSEST(val, 1000); + + /* + * Ensure that the resulting number is within range. + * Valid range is 0x400..0x7ff, where bit 10 reflects + * the implied high bit in normalized ieee754 numbers. + * Set the range to 0x400..0x7ff to reflect this. + * The upper bit is then removed by the mask against + * 0x3ff in the final assignment. + */ + if (mantissa > 0x7ff) + mantissa = 0x7ff; + else if (mantissa < 0x400) + mantissa = 0x400; + + /* Convert to sign, 5 bit exponent, 10 bit mantissa */ + return sign | (mantissa & 0x3ff) | ((exponent << 10) & 0x7c00); +} + +#define MAX_LIN_MANTISSA (1023 * 1000) +#define MIN_LIN_MANTISSA (511 * 1000) static u16 pmbus_data2reg_linear(struct pmbus_data *data, - struct pmbus_sensor *sensor, long val) + struct pmbus_sensor *sensor, s64 val) { s16 exponent = 0, mantissa; bool negative = false; @@ -788,8 +1004,8 @@ static u16 pmbus_data2reg_linear(struct pmbus_data *data, val <<= -data->exponent[sensor->page]; else val >>= data->exponent[sensor->page]; - val = DIV_ROUND_CLOSEST(val, 1000); - return val & 0xffff; + val = DIV_ROUND_CLOSEST_ULL(val, 1000); + return clamp_val(val, 0, 0xffff); } if (val < 0) { @@ -799,32 +1015,28 @@ static u16 pmbus_data2reg_linear(struct pmbus_data *data, /* Power is in uW. Convert to mW before converting. */ if (sensor->class == PSC_POWER) - val = DIV_ROUND_CLOSEST(val, 1000L); + val = DIV_ROUND_CLOSEST_ULL(val, 1000); /* * For simplicity, convert fan data to milli-units * before calculating the exponent. */ if (sensor->class == PSC_FAN) - val = val * 1000; + val = val * 1000LL; /* Reduce large mantissa until it fits into 10 bit */ - while (val >= MAX_MANTISSA && exponent < 15) { + while (val >= MAX_LIN_MANTISSA && exponent < 15) { exponent++; val >>= 1; } /* Increase small mantissa to improve precision */ - while (val < MIN_MANTISSA && exponent > -15) { + while (val < MIN_LIN_MANTISSA && exponent > -15) { exponent--; val <<= 1; } /* Convert mantissa from milli-units to units */ - mantissa = DIV_ROUND_CLOSEST(val, 1000); - - /* Ensure that resulting number is within range */ - if (mantissa > 0x3ff) - mantissa = 0x3ff; + mantissa = clamp_val(DIV_ROUND_CLOSEST_ULL(val, 1000), 0, 0x3ff); /* restore sign */ if (negative) @@ -835,9 +1047,9 @@ static u16 pmbus_data2reg_linear(struct pmbus_data *data, } static u16 pmbus_data2reg_direct(struct pmbus_data *data, - struct pmbus_sensor *sensor, long val) + struct pmbus_sensor *sensor, s64 val) { - s64 b, val64 = val; + s64 b; s32 m, R; m = data->info->m[sensor->class]; @@ -855,30 +1067,30 @@ static u16 pmbus_data2reg_direct(struct pmbus_data *data, R -= 3; /* Adjust R and b for data in milli-units */ b *= 1000; } - val64 = val64 * m + b; + val = val * m + b; while (R > 0) { - val64 *= 10; + val *= 10; R--; } while (R < 0) { - val64 = div_s64(val64 + 5LL, 10L); /* round closest */ + val = div_s64(val + 5LL, 10L); /* round closest */ R++; } - return (u16)clamp_val(val64, S16_MIN, S16_MAX); + return (u16)clamp_val(val, S16_MIN, S16_MAX); } static u16 pmbus_data2reg_vid(struct pmbus_data *data, - struct pmbus_sensor *sensor, long val) + struct pmbus_sensor *sensor, s64 val) { val = clamp_val(val, 500, 1600); - return 2 + DIV_ROUND_CLOSEST((1600 - val) * 100, 625); + return 2 + DIV_ROUND_CLOSEST_ULL((1600LL - val) * 100LL, 625); } static u16 pmbus_data2reg(struct pmbus_data *data, - struct pmbus_sensor *sensor, long val) + struct pmbus_sensor *sensor, s64 val) { u16 regval; @@ -892,6 +1104,9 @@ static u16 pmbus_data2reg(struct pmbus_data *data, case vid: regval = pmbus_data2reg_vid(data, sensor, val); break; + case ieee754: + regval = pmbus_data2reg_ieee754(data, sensor, val); + break; case linear: default: regval = pmbus_data2reg_linear(data, sensor, val); @@ -923,38 +1138,60 @@ static u16 pmbus_data2reg(struct pmbus_data *data, * If a negative value is stored in any of the referenced registers, this value * reflects an error code which will be returned. */ -static int pmbus_get_boolean(struct pmbus_data *data, struct pmbus_boolean *b, +static int pmbus_get_boolean(struct i2c_client *client, struct pmbus_boolean *b, int index) { + struct pmbus_data *data = i2c_get_clientdata(client); struct pmbus_sensor *s1 = b->s1; struct pmbus_sensor *s2 = b->s2; - u16 reg = (index >> 16) & 0xffff; - u16 mask = index & 0xffff; + u16 mask = pb_index_to_mask(index); + u8 page = pb_index_to_page(index); + u16 reg = pb_index_to_reg(index); int ret, status; u16 regval; - status = data->status[reg]; - if (status < 0) - return status; + mutex_lock(&data->update_lock); + status = pmbus_get_status(client, page, reg); + if (status < 0) { + ret = status; + goto unlock; + } + + if (s1) + pmbus_update_sensor_data(client, s1); + if (s2) + pmbus_update_sensor_data(client, s2); regval = status & mask; - if (!s1 && !s2) { - ret = !!regval; - } else if (!s1 || !s2) { - WARN(1, "Bad boolean descriptor %p: s1=%p, s2=%p\n", b, s1, s2); - return 0; - } else { - long v1, v2; + if (regval) { + if (data->revision >= PMBUS_REV_12) { + ret = _pmbus_write_byte_data(client, page, reg, regval); + if (ret) + goto unlock; + } else { + pmbus_clear_fault_page(client, page); + } + } + if (s1 && s2) { + s64 v1, v2; - if (s1->data < 0) - return s1->data; - if (s2->data < 0) - return s2->data; + if (s1->data < 0) { + ret = s1->data; + goto unlock; + } + if (s2->data < 0) { + ret = s2->data; + goto unlock; + } v1 = pmbus_reg2data(data, s1); v2 = pmbus_reg2data(data, s2); ret = !!(regval && v1 >= v2); + } else { + ret = !!regval; } +unlock: + mutex_unlock(&data->update_lock); return ret; } @@ -963,25 +1200,31 @@ static ssize_t pmbus_show_boolean(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(da); struct pmbus_boolean *boolean = to_pmbus_boolean(attr); - struct pmbus_data *data = pmbus_update_device(dev); + struct i2c_client *client = to_i2c_client(dev->parent); int val; - val = pmbus_get_boolean(data, boolean, attr->index); + val = pmbus_get_boolean(client, boolean, attr->index); if (val < 0) return val; - return snprintf(buf, PAGE_SIZE, "%d\n", val); + return sysfs_emit(buf, "%d\n", val); } static ssize_t pmbus_show_sensor(struct device *dev, struct device_attribute *devattr, char *buf) { - struct pmbus_data *data = pmbus_update_device(dev); + struct i2c_client *client = to_i2c_client(dev->parent); struct pmbus_sensor *sensor = to_pmbus_sensor(devattr); + struct pmbus_data *data = i2c_get_clientdata(client); + ssize_t ret; + mutex_lock(&data->update_lock); + pmbus_update_sensor_data(client, sensor); if (sensor->data < 0) - return sensor->data; - - return snprintf(buf, PAGE_SIZE, "%ld\n", pmbus_reg2data(data, sensor)); + ret = sensor->data; + else + ret = sysfs_emit(buf, "%lld\n", pmbus_reg2data(data, sensor)); + mutex_unlock(&data->update_lock); + return ret; } static ssize_t pmbus_set_sensor(struct device *dev, @@ -992,11 +1235,11 @@ static ssize_t pmbus_set_sensor(struct device *dev, struct pmbus_data *data = i2c_get_clientdata(client); struct pmbus_sensor *sensor = to_pmbus_sensor(devattr); ssize_t rv = count; - long val = 0; + s64 val; int ret; u16 regval; - if (kstrtol(buf, 10, &val) < 0) + if (kstrtos64(buf, 10, &val) < 0) return -EINVAL; mutex_lock(&data->update_lock); @@ -1005,7 +1248,7 @@ static ssize_t pmbus_set_sensor(struct device *dev, if (ret < 0) rv = ret; else - sensor->data = regval; + sensor->data = -ENODATA; mutex_unlock(&data->update_lock); return rv; } @@ -1015,16 +1258,16 @@ static ssize_t pmbus_show_label(struct device *dev, { struct pmbus_label *label = to_pmbus_label(da); - return snprintf(buf, PAGE_SIZE, "%s\n", label->label); + return sysfs_emit(buf, "%s\n", label->label); } static int pmbus_add_attribute(struct pmbus_data *data, struct attribute *attr) { if (data->num_attributes >= data->max_attributes - 1) { int new_max_attrs = data->max_attributes + PMBUS_ATTR_ALLOC_SIZE; - void *new_attrs = krealloc(data->group.attrs, - new_max_attrs * sizeof(void *), - GFP_KERNEL); + void *new_attrs = devm_krealloc_array(data->dev, data->group.attrs, + new_max_attrs, sizeof(void *), + GFP_KERNEL); if (!new_attrs) return -ENOMEM; data->group.attrs = new_attrs; @@ -1072,11 +1315,14 @@ static int pmbus_add_boolean(struct pmbus_data *data, const char *name, const char *type, int seq, struct pmbus_sensor *s1, struct pmbus_sensor *s2, - u16 reg, u16 mask) + u8 page, u16 reg, u16 mask) { struct pmbus_boolean *boolean; struct sensor_device_attribute *a; + if (WARN((s1 && !s2) || (!s1 && s2), "Bad s1/s2 parameters\n")) + return -EINVAL; + boolean = devm_kzalloc(data->dev, sizeof(*boolean), GFP_KERNEL); if (!boolean) return -ENOMEM; @@ -1088,11 +1334,73 @@ static int pmbus_add_boolean(struct pmbus_data *data, boolean->s1 = s1; boolean->s2 = s2; pmbus_attr_init(a, boolean->name, 0444, pmbus_show_boolean, NULL, - (reg << 16) | mask); + pb_reg_to_index(page, reg, mask)); return pmbus_add_attribute(data, &a->dev_attr.attr); } +/* of thermal for pmbus temperature sensors */ +struct pmbus_thermal_data { + struct pmbus_data *pmbus_data; + struct pmbus_sensor *sensor; +}; + +static int pmbus_thermal_get_temp(struct thermal_zone_device *tz, int *temp) +{ + struct pmbus_thermal_data *tdata = thermal_zone_device_priv(tz); + struct pmbus_sensor *sensor = tdata->sensor; + struct pmbus_data *pmbus_data = tdata->pmbus_data; + struct i2c_client *client = to_i2c_client(pmbus_data->dev); + struct device *dev = pmbus_data->hwmon_dev; + int ret = 0; + + if (!dev) { + /* May not even get to hwmon yet */ + *temp = 0; + return 0; + } + + mutex_lock(&pmbus_data->update_lock); + pmbus_update_sensor_data(client, sensor); + if (sensor->data < 0) + ret = sensor->data; + else + *temp = (int)pmbus_reg2data(pmbus_data, sensor); + mutex_unlock(&pmbus_data->update_lock); + + return ret; +} + +static const struct thermal_zone_device_ops pmbus_thermal_ops = { + .get_temp = pmbus_thermal_get_temp, +}; + +static int pmbus_thermal_add_sensor(struct pmbus_data *pmbus_data, + struct pmbus_sensor *sensor, int index) +{ + struct device *dev = pmbus_data->dev; + struct pmbus_thermal_data *tdata; + struct thermal_zone_device *tzd; + + tdata = devm_kzalloc(dev, sizeof(*tdata), GFP_KERNEL); + if (!tdata) + return -ENOMEM; + + tdata->sensor = sensor; + tdata->pmbus_data = pmbus_data; + + tzd = devm_thermal_of_zone_register(dev, index, tdata, + &pmbus_thermal_ops); + /* + * If CONFIG_THERMAL_OF is disabled, this returns -ENODEV, + * so ignore that error but forward any other error. + */ + if (IS_ERR(tzd) && (PTR_ERR(tzd) != -ENODEV)) + return PTR_ERR(tzd); + + return 0; +} + static struct pmbus_sensor *pmbus_add_sensor(struct pmbus_data *data, const char *name, const char *type, int seq, int page, int phase, @@ -1125,6 +1433,7 @@ static struct pmbus_sensor *pmbus_add_sensor(struct pmbus_data *data, sensor->class = class; sensor->update = update; sensor->convert = convert; + sensor->data = -ENODATA; pmbus_dev_attr_init(a, sensor->name, readonly ? 0444 : 0644, pmbus_show_sensor, pmbus_set_sensor); @@ -1135,6 +1444,10 @@ static struct pmbus_sensor *pmbus_add_sensor(struct pmbus_data *data, sensor->next = data->sensors; data->sensors = sensor; + /* temperature sensors with _input values are registered with thermal */ + if (class == PSC_TEMPERATURE && strcmp(type, "input") == 0) + pmbus_thermal_add_sensor(data, sensor, seq); + return sensor; } @@ -1154,8 +1467,7 @@ static int pmbus_add_label(struct pmbus_data *data, snprintf(label->name, sizeof(label->name), "%s%d_label", name, seq); if (!index) { if (phase == 0xff) - strncpy(label->label, lstring, - sizeof(label->label) - 1); + strscpy(label->label, lstring); else snprintf(label->label, sizeof(label->label), "%s.%d", lstring, phase); @@ -1184,8 +1496,7 @@ struct pmbus_limit_attr { u16 reg; /* Limit register */ u16 sbit; /* Alarm attribute status bit */ bool update; /* True if register needs updates */ - bool low; /* True if low limit; for limits with compare - functions only */ + bool low; /* True if low limit; for limits with compare functions only */ const char *attr; /* Attribute name */ const char *alarm; /* Alarm attribute name */ }; @@ -1205,7 +1516,7 @@ struct pmbus_sensor_attr { bool compare; /* true if compare function needed */ u32 func; /* sensor mask */ u32 sfunc; /* sensor status mask */ - int sbase; /* status base register */ + int sreg; /* status register */ const struct pmbus_limit_attr *limit;/* limit registers */ }; @@ -1243,7 +1554,7 @@ static int pmbus_add_limit_attrs(struct i2c_client *client, : NULL, attr->compare ? l->low ? base : curr : NULL, - attr->sbase + page, l->sbit); + page, attr->sreg, l->sbit); if (ret) return ret; have_alarm = 1; @@ -1289,11 +1600,11 @@ static int pmbus_add_sensor_attrs_one(struct i2c_client *client, * which global bit is set) for this page is accessible. */ if (!ret && attr->gbit && - (!upper || (upper && data->has_status_word)) && + (!upper || data->has_status_word) && pmbus_check_status_register(client, page)) { ret = pmbus_add_boolean(data, name, "alarm", index, NULL, NULL, - PB_STATUS_BASE + page, + page, PMBUS_STATUS_WORD, attr->gbit); if (ret) return ret; @@ -1343,14 +1654,14 @@ static int pmbus_add_sensor_attrs(struct i2c_client *client, pages = paged ? info->pages : 1; for (page = 0; page < pages; page++) { - if (!(info->func[page] & attrs->func)) - continue; - ret = pmbus_add_sensor_attrs_one(client, data, info, - name, index, page, - 0xff, attrs, paged); - if (ret) - return ret; - index++; + if (info->func[page] & attrs->func) { + ret = pmbus_add_sensor_attrs_one(client, data, info, + name, index, page, + 0xff, attrs, paged); + if (ret) + return ret; + index++; + } if (info->phases[page]) { int phase; @@ -1382,7 +1693,7 @@ static const struct pmbus_limit_attr vin_limit_attrs[] = { .reg = PMBUS_VIN_UV_FAULT_LIMIT, .attr = "lcrit", .alarm = "lcrit_alarm", - .sbit = PB_VOLTAGE_UV_FAULT, + .sbit = PB_VOLTAGE_UV_FAULT | PB_VOLTAGE_VIN_OFF, }, { .reg = PMBUS_VIN_OV_WARN_LIMIT, .attr = "max", @@ -1408,6 +1719,12 @@ static const struct pmbus_limit_attr vin_limit_attrs[] = { }, { .reg = PMBUS_VIRT_RESET_VIN_HISTORY, .attr = "reset_history", + }, { + .reg = PMBUS_MFR_VIN_MIN, + .attr = "rated_min", + }, { + .reg = PMBUS_MFR_VIN_MAX, + .attr = "rated_max", }, }; @@ -1471,7 +1788,13 @@ static const struct pmbus_limit_attr vout_limit_attrs[] = { }, { .reg = PMBUS_VIRT_RESET_VOUT_HISTORY, .attr = "reset_history", - } + }, { + .reg = PMBUS_MFR_VOUT_MIN, + .attr = "rated_min", + }, { + .reg = PMBUS_MFR_VOUT_MAX, + .attr = "rated_max", + }, }; static const struct pmbus_sensor_attr voltage_attributes[] = { @@ -1481,7 +1804,7 @@ static const struct pmbus_sensor_attr voltage_attributes[] = { .label = "vin", .func = PMBUS_HAVE_VIN, .sfunc = PMBUS_HAVE_STATUS_INPUT, - .sbase = PB_STATUS_INPUT_BASE, + .sreg = PMBUS_STATUS_INPUT, .gbit = PB_STATUS_VIN_UV, .limit = vin_limit_attrs, .nlimit = ARRAY_SIZE(vin_limit_attrs), @@ -1491,7 +1814,7 @@ static const struct pmbus_sensor_attr voltage_attributes[] = { .label = "vmon", .func = PMBUS_HAVE_VMON, .sfunc = PMBUS_HAVE_STATUS_VMON, - .sbase = PB_STATUS_VMON_BASE, + .sreg = PMBUS_VIRT_STATUS_VMON, .limit = vmon_limit_attrs, .nlimit = ARRAY_SIZE(vmon_limit_attrs), }, { @@ -1506,7 +1829,7 @@ static const struct pmbus_sensor_attr voltage_attributes[] = { .paged = true, .func = PMBUS_HAVE_VOUT, .sfunc = PMBUS_HAVE_STATUS_VOUT, - .sbase = PB_STATUS_VOUT_BASE, + .sreg = PMBUS_STATUS_VOUT, .gbit = PB_STATUS_VOUT_OV, .limit = vout_limit_attrs, .nlimit = ARRAY_SIZE(vout_limit_attrs), @@ -1541,7 +1864,10 @@ static const struct pmbus_limit_attr iin_limit_attrs[] = { }, { .reg = PMBUS_VIRT_RESET_IIN_HISTORY, .attr = "reset_history", - } + }, { + .reg = PMBUS_MFR_IIN_MAX, + .attr = "rated_max", + }, }; static const struct pmbus_limit_attr iout_limit_attrs[] = { @@ -1575,7 +1901,10 @@ static const struct pmbus_limit_attr iout_limit_attrs[] = { }, { .reg = PMBUS_VIRT_RESET_IOUT_HISTORY, .attr = "reset_history", - } + }, { + .reg = PMBUS_MFR_IOUT_MAX, + .attr = "rated_max", + }, }; static const struct pmbus_sensor_attr current_attributes[] = { @@ -1585,7 +1914,7 @@ static const struct pmbus_sensor_attr current_attributes[] = { .label = "iin", .func = PMBUS_HAVE_IIN, .sfunc = PMBUS_HAVE_STATUS_INPUT, - .sbase = PB_STATUS_INPUT_BASE, + .sreg = PMBUS_STATUS_INPUT, .gbit = PB_STATUS_INPUT, .limit = iin_limit_attrs, .nlimit = ARRAY_SIZE(iin_limit_attrs), @@ -1596,7 +1925,7 @@ static const struct pmbus_sensor_attr current_attributes[] = { .paged = true, .func = PMBUS_HAVE_IOUT, .sfunc = PMBUS_HAVE_STATUS_IOUT, - .sbase = PB_STATUS_IOUT_BASE, + .sreg = PMBUS_STATUS_IOUT, .gbit = PB_STATUS_IOUT_OC, .limit = iout_limit_attrs, .nlimit = ARRAY_SIZE(iout_limit_attrs), @@ -1626,7 +1955,10 @@ static const struct pmbus_limit_attr pin_limit_attrs[] = { }, { .reg = PMBUS_VIRT_RESET_PIN_HISTORY, .attr = "reset_history", - } + }, { + .reg = PMBUS_MFR_PIN_MAX, + .attr = "rated_max", + }, }; static const struct pmbus_limit_attr pout_limit_attrs[] = { @@ -1660,7 +1992,10 @@ static const struct pmbus_limit_attr pout_limit_attrs[] = { }, { .reg = PMBUS_VIRT_RESET_POUT_HISTORY, .attr = "reset_history", - } + }, { + .reg = PMBUS_MFR_POUT_MAX, + .attr = "rated_max", + }, }; static const struct pmbus_sensor_attr power_attributes[] = { @@ -1670,7 +2005,7 @@ static const struct pmbus_sensor_attr power_attributes[] = { .label = "pin", .func = PMBUS_HAVE_PIN, .sfunc = PMBUS_HAVE_STATUS_INPUT, - .sbase = PB_STATUS_INPUT_BASE, + .sreg = PMBUS_STATUS_INPUT, .gbit = PB_STATUS_INPUT, .limit = pin_limit_attrs, .nlimit = ARRAY_SIZE(pin_limit_attrs), @@ -1681,7 +2016,7 @@ static const struct pmbus_sensor_attr power_attributes[] = { .paged = true, .func = PMBUS_HAVE_POUT, .sfunc = PMBUS_HAVE_STATUS_IOUT, - .sbase = PB_STATUS_IOUT_BASE, + .sreg = PMBUS_STATUS_IOUT, .limit = pout_limit_attrs, .nlimit = ARRAY_SIZE(pout_limit_attrs), } @@ -1724,7 +2059,10 @@ static const struct pmbus_limit_attr temp_limit_attrs[] = { }, { .reg = PMBUS_VIRT_RESET_TEMP_HISTORY, .attr = "reset_history", - } + }, { + .reg = PMBUS_MFR_MAX_TEMP_1, + .attr = "rated_max", + }, }; static const struct pmbus_limit_attr temp_limit_attrs2[] = { @@ -1762,7 +2100,10 @@ static const struct pmbus_limit_attr temp_limit_attrs2[] = { }, { .reg = PMBUS_VIRT_RESET_TEMP2_HISTORY, .attr = "reset_history", - } + }, { + .reg = PMBUS_MFR_MAX_TEMP_2, + .attr = "rated_max", + }, }; static const struct pmbus_limit_attr temp_limit_attrs3[] = { @@ -1788,7 +2129,10 @@ static const struct pmbus_limit_attr temp_limit_attrs3[] = { .attr = "crit", .alarm = "crit_alarm", .sbit = PB_TEMP_OT_FAULT, - } + }, { + .reg = PMBUS_MFR_MAX_TEMP_3, + .attr = "rated_max", + }, }; static const struct pmbus_sensor_attr temp_attributes[] = { @@ -1800,7 +2144,7 @@ static const struct pmbus_sensor_attr temp_attributes[] = { .compare = true, .func = PMBUS_HAVE_TEMP, .sfunc = PMBUS_HAVE_STATUS_TEMP, - .sbase = PB_STATUS_TEMP_BASE, + .sreg = PMBUS_STATUS_TEMPERATURE, .gbit = PB_STATUS_TEMPERATURE, .limit = temp_limit_attrs, .nlimit = ARRAY_SIZE(temp_limit_attrs), @@ -1812,7 +2156,7 @@ static const struct pmbus_sensor_attr temp_attributes[] = { .compare = true, .func = PMBUS_HAVE_TEMP2, .sfunc = PMBUS_HAVE_STATUS_TEMP, - .sbase = PB_STATUS_TEMP_BASE, + .sreg = PMBUS_STATUS_TEMPERATURE, .gbit = PB_STATUS_TEMPERATURE, .limit = temp_limit_attrs2, .nlimit = ARRAY_SIZE(temp_limit_attrs2), @@ -1824,7 +2168,7 @@ static const struct pmbus_sensor_attr temp_attributes[] = { .compare = true, .func = PMBUS_HAVE_TEMP3, .sfunc = PMBUS_HAVE_STATUS_TEMP, - .sbase = PB_STATUS_TEMP_BASE, + .sreg = PMBUS_STATUS_TEMPERATURE, .gbit = PB_STATUS_TEMPERATURE, .limit = temp_limit_attrs3, .nlimit = ARRAY_SIZE(temp_limit_attrs3), @@ -1863,31 +2207,31 @@ static const u32 pmbus_fan_status_flags[] = { /* Precondition: FAN_CONFIG_x_y and FAN_COMMAND_x must exist for the fan ID */ static int pmbus_add_fan_ctrl(struct i2c_client *client, - struct pmbus_data *data, int index, int page, int id, - u8 config) + struct pmbus_data *data, int index, int page, + int id, u8 config) { struct pmbus_sensor *sensor; sensor = pmbus_add_sensor(data, "fan", "target", index, page, - PMBUS_VIRT_FAN_TARGET_1 + id, 0xff, PSC_FAN, + 0xff, PMBUS_VIRT_FAN_TARGET_1 + id, PSC_FAN, false, false, true); if (!sensor) return -ENOMEM; if (!((data->info->func[page] & PMBUS_HAVE_PWM12) || - (data->info->func[page] & PMBUS_HAVE_PWM34))) + (data->info->func[page] & PMBUS_HAVE_PWM34))) return 0; sensor = pmbus_add_sensor(data, "pwm", NULL, index, page, - PMBUS_VIRT_PWM_1 + id, 0xff, PSC_PWM, + 0xff, PMBUS_VIRT_PWM_1 + id, PSC_PWM, false, false, true); if (!sensor) return -ENOMEM; sensor = pmbus_add_sensor(data, "pwm", "enable", index, page, - PMBUS_VIRT_PWM_ENABLE_1 + id, 0xff, PSC_PWM, + 0xff, PMBUS_VIRT_PWM_ENABLE_1 + id, PSC_PWM, true, false, false); if (!sensor) @@ -1929,7 +2273,7 @@ static int pmbus_add_fan_attributes(struct i2c_client *client, continue; if (pmbus_add_sensor(data, "fan", "input", index, - page, pmbus_fan_registers[f], 0xff, + page, 0xff, pmbus_fan_registers[f], PSC_FAN, true, true, true) == NULL) return -ENOMEM; @@ -1949,19 +2293,19 @@ static int pmbus_add_fan_attributes(struct i2c_client *client, if ((info->func[page] & pmbus_fan_status_flags[f]) && pmbus_check_byte_register(client, page, pmbus_fan_status_registers[f])) { - int base; + int reg; if (f > 1) /* fan 3, 4 */ - base = PB_STATUS_FAN34_BASE + page; + reg = PMBUS_STATUS_FAN_34; else - base = PB_STATUS_FAN_BASE + page; + reg = PMBUS_STATUS_FAN_12; ret = pmbus_add_boolean(data, "fan", - "alarm", index, NULL, NULL, base, + "alarm", index, NULL, NULL, page, reg, PB_FAN_FAN1_WARNING >> (f & 1)); if (ret) return ret; ret = pmbus_add_boolean(data, "fan", - "fault", index, NULL, NULL, base, + "fault", index, NULL, NULL, page, reg, PB_FAN_FAN1_FAULT >> (f & 1)); if (ret) return ret; @@ -2010,12 +2354,15 @@ static ssize_t pmbus_show_samples(struct device *dev, int val; struct i2c_client *client = to_i2c_client(dev->parent); struct pmbus_samples_reg *reg = to_samples_reg(devattr); + struct pmbus_data *data = i2c_get_clientdata(client); + mutex_lock(&data->update_lock); val = _pmbus_read_word_data(client, reg->page, 0xff, reg->attr->reg); + mutex_unlock(&data->update_lock); if (val < 0) return val; - return snprintf(buf, PAGE_SIZE, "%d\n", val); + return sysfs_emit(buf, "%d\n", val); } static ssize_t pmbus_set_samples(struct device *dev, @@ -2120,6 +2467,113 @@ static int pmbus_find_attributes(struct i2c_client *client, } /* + * The pmbus_class_attr_map structure maps one sensor class to + * it's corresponding sensor attributes array. + */ +struct pmbus_class_attr_map { + enum pmbus_sensor_classes class; + int nattr; + const struct pmbus_sensor_attr *attr; +}; + +static const struct pmbus_class_attr_map class_attr_map[] = { + { + .class = PSC_VOLTAGE_IN, + .attr = voltage_attributes, + .nattr = ARRAY_SIZE(voltage_attributes), + }, { + .class = PSC_VOLTAGE_OUT, + .attr = voltage_attributes, + .nattr = ARRAY_SIZE(voltage_attributes), + }, { + .class = PSC_CURRENT_IN, + .attr = current_attributes, + .nattr = ARRAY_SIZE(current_attributes), + }, { + .class = PSC_CURRENT_OUT, + .attr = current_attributes, + .nattr = ARRAY_SIZE(current_attributes), + }, { + .class = PSC_POWER, + .attr = power_attributes, + .nattr = ARRAY_SIZE(power_attributes), + }, { + .class = PSC_TEMPERATURE, + .attr = temp_attributes, + .nattr = ARRAY_SIZE(temp_attributes), + } +}; + +/* + * Read the coefficients for direct mode. + */ +static int pmbus_read_coefficients(struct i2c_client *client, + struct pmbus_driver_info *info, + const struct pmbus_sensor_attr *attr) +{ + int rv; + union i2c_smbus_data data; + enum pmbus_sensor_classes class = attr->class; + s8 R; + s16 m, b; + + data.block[0] = 2; + data.block[1] = attr->reg; + data.block[2] = 0x01; + + pmbus_wait(client); + rv = i2c_smbus_xfer(client->adapter, client->addr, client->flags, + I2C_SMBUS_WRITE, PMBUS_COEFFICIENTS, + I2C_SMBUS_BLOCK_PROC_CALL, &data); + pmbus_update_ts(client, PMBUS_OP_WRITE); + + if (rv < 0) + return rv; + + if (data.block[0] != 5) + return -EIO; + + m = data.block[1] | (data.block[2] << 8); + b = data.block[3] | (data.block[4] << 8); + R = data.block[5]; + info->m[class] = m; + info->b[class] = b; + info->R[class] = R; + + return rv; +} + +static int pmbus_init_coefficients(struct i2c_client *client, + struct pmbus_driver_info *info) +{ + int i, n, ret = -EINVAL; + const struct pmbus_class_attr_map *map; + const struct pmbus_sensor_attr *attr; + + for (i = 0; i < ARRAY_SIZE(class_attr_map); i++) { + map = &class_attr_map[i]; + if (info->format[map->class] != direct) + continue; + for (n = 0; n < map->nattr; n++) { + attr = &map->attr[n]; + if (map->class != attr->class) + continue; + ret = pmbus_read_coefficients(client, info, attr); + if (ret >= 0) + break; + } + if (ret < 0) { + dev_err(&client->dev, + "No coefficients found for sensor class %d\n", + map->class); + return -EINVAL; + } + } + + return 0; +} + +/* * Identify chip parameters. * This function is called for all chips. */ @@ -2151,12 +2605,15 @@ static int pmbus_identify_common(struct i2c_client *client, if (data->info->format[PSC_VOLTAGE_OUT] != direct) return -ENODEV; break; + case 3: /* ieee 754 half precision */ + if (data->info->format[PSC_VOLTAGE_OUT] != ieee754) + return -ENODEV; + break; default: return -ENODEV; } } - pmbus_clear_fault_page(client, page); return 0; } @@ -2170,6 +2627,92 @@ static int pmbus_read_status_word(struct i2c_client *client, int page) return _pmbus_read_word_data(client, page, 0xff, PMBUS_STATUS_WORD); } +/* PEC attribute support */ + +static ssize_t pec_show(struct device *dev, struct device_attribute *dummy, + char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + + return sysfs_emit(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC)); +} + +static ssize_t pec_store(struct device *dev, struct device_attribute *dummy, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + bool enable; + int err; + + err = kstrtobool(buf, &enable); + if (err < 0) + return err; + + if (enable) + client->flags |= I2C_CLIENT_PEC; + else + client->flags &= ~I2C_CLIENT_PEC; + + return count; +} + +static DEVICE_ATTR_RW(pec); + +static void pmbus_remove_pec(void *dev) +{ + device_remove_file(dev, &dev_attr_pec); +} + +static void pmbus_init_wp(struct i2c_client *client, struct pmbus_data *data) +{ + int ret; + + switch (wp) { + case 0: + _pmbus_write_byte_data(client, -1, + PMBUS_WRITE_PROTECT, 0); + break; + + case 1: + _pmbus_write_byte_data(client, -1, + PMBUS_WRITE_PROTECT, PB_WP_VOUT); + break; + + case 2: + _pmbus_write_byte_data(client, -1, + PMBUS_WRITE_PROTECT, PB_WP_OP); + break; + + case 3: + _pmbus_write_byte_data(client, -1, + PMBUS_WRITE_PROTECT, PB_WP_ALL); + break; + + default: + /* Ignore the other values */ + break; + } + + ret = _pmbus_read_byte_data(client, -1, PMBUS_WRITE_PROTECT); + if (ret < 0) + return; + + switch (ret & PB_WP_ANY) { + case PB_WP_ALL: + data->flags |= PMBUS_OP_PROTECTED; + fallthrough; + case PB_WP_OP: + data->flags |= PMBUS_VOUT_PROTECTED; + fallthrough; + case PB_WP_VOUT: + data->flags |= PMBUS_WRITE_PROTECTED | PMBUS_SKIP_STATUS_CHECK; + break; + + default: + break; + } +} + static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data, struct pmbus_driver_info *info) { @@ -2177,15 +2720,39 @@ static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data, int page, ret; /* + * Figure out if PEC is enabled before accessing any other register. + * Make sure PEC is disabled, will be enabled later if needed. + */ + client->flags &= ~I2C_CLIENT_PEC; + + /* Enable PEC if the controller and bus supports it */ + if (!(data->flags & PMBUS_NO_CAPABILITY)) { + pmbus_wait(client); + ret = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY); + pmbus_update_ts(client, 0); + + if (ret >= 0 && (ret & PB_CAPABILITY_ERROR_CHECK)) { + if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_PEC)) + client->flags |= I2C_CLIENT_PEC; + } + } + + /* * Some PMBus chips don't support PMBUS_STATUS_WORD, so try * to use PMBUS_STATUS_BYTE instead if that is the case. * Bail out if both registers are not supported. */ data->read_status = pmbus_read_status_word; + pmbus_wait(client); ret = i2c_smbus_read_word_data(client, PMBUS_STATUS_WORD); + pmbus_update_ts(client, 0); + if (ret < 0 || ret == 0xffff) { data->read_status = pmbus_read_status_byte; + pmbus_wait(client); ret = i2c_smbus_read_byte_data(client, PMBUS_STATUS_BYTE); + pmbus_update_ts(client, 0); + if (ret < 0 || ret == 0xff) { dev_err(dev, "PMBus status register not found\n"); return -ENODEV; @@ -2194,19 +2761,17 @@ static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data, data->has_status_word = true; } - /* Enable PEC if the controller supports it */ - ret = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY); - if (ret >= 0 && (ret & PB_CAPABILITY_ERROR_CHECK)) - client->flags |= I2C_CLIENT_PEC; - /* * Check if the chip is write protected. If it is, we can not clear * faults, and we should not try it. Also, in that case, writes into * limit registers need to be disabled. */ - ret = i2c_smbus_read_byte_data(client, PMBUS_WRITE_PROTECT); - if (ret > 0 && (ret & PB_WP_ANY)) - data->flags |= PMBUS_WRITE_PROTECTED | PMBUS_SKIP_STATUS_CHECK; + if (!(data->flags & PMBUS_NO_WRITE_PROTECT)) + pmbus_init_wp(client, data); + + ret = i2c_smbus_read_byte_data(client, PMBUS_REVISION); + if (ret >= 0) + data->revision = ret; if (data->info->pages) pmbus_clear_faults(client); @@ -2233,33 +2798,256 @@ static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data, return ret; } } + + if (data->flags & PMBUS_USE_COEFFICIENTS_CMD) { + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BLOCK_PROC_CALL)) + return -ENODEV; + + ret = pmbus_init_coefficients(client, info); + if (ret < 0) + return ret; + } + + if (client->flags & I2C_CLIENT_PEC) { + /* + * If I2C_CLIENT_PEC is set here, both the I2C adapter and the + * chip support PEC. Add 'pec' attribute to client device to let + * the user control it. + */ + ret = device_create_file(dev, &dev_attr_pec); + if (ret) + return ret; + ret = devm_add_action_or_reset(dev, pmbus_remove_pec, dev); + if (ret) + return ret; + } + return 0; } -#if IS_ENABLED(CONFIG_REGULATOR) -static int pmbus_regulator_is_enabled(struct regulator_dev *rdev) +/* A PMBus status flag and the corresponding REGULATOR_ERROR_* and REGULATOR_EVENTS_* flag */ +struct pmbus_status_assoc { + int pflag, rflag, eflag; +}; + +/* PMBus->regulator bit mappings for a PMBus status register */ +struct pmbus_status_category { + int func; + int reg; + const struct pmbus_status_assoc *bits; /* zero-terminated */ +}; + +static const struct pmbus_status_category __maybe_unused pmbus_status_flag_map[] = { + { + .func = PMBUS_HAVE_STATUS_VOUT, + .reg = PMBUS_STATUS_VOUT, + .bits = (const struct pmbus_status_assoc[]) { + { PB_VOLTAGE_UV_WARNING, REGULATOR_ERROR_UNDER_VOLTAGE_WARN, + REGULATOR_EVENT_UNDER_VOLTAGE_WARN }, + { PB_VOLTAGE_UV_FAULT, REGULATOR_ERROR_UNDER_VOLTAGE, + REGULATOR_EVENT_UNDER_VOLTAGE }, + { PB_VOLTAGE_OV_WARNING, REGULATOR_ERROR_OVER_VOLTAGE_WARN, + REGULATOR_EVENT_OVER_VOLTAGE_WARN }, + { PB_VOLTAGE_OV_FAULT, REGULATOR_ERROR_REGULATION_OUT, + REGULATOR_EVENT_OVER_VOLTAGE_WARN }, + { }, + }, + }, { + .func = PMBUS_HAVE_STATUS_IOUT, + .reg = PMBUS_STATUS_IOUT, + .bits = (const struct pmbus_status_assoc[]) { + { PB_IOUT_OC_WARNING, REGULATOR_ERROR_OVER_CURRENT_WARN, + REGULATOR_EVENT_OVER_CURRENT_WARN }, + { PB_IOUT_OC_FAULT, REGULATOR_ERROR_OVER_CURRENT, + REGULATOR_EVENT_OVER_CURRENT }, + { PB_IOUT_OC_LV_FAULT, REGULATOR_ERROR_OVER_CURRENT, + REGULATOR_EVENT_OVER_CURRENT }, + { }, + }, + }, { + .func = PMBUS_HAVE_STATUS_TEMP, + .reg = PMBUS_STATUS_TEMPERATURE, + .bits = (const struct pmbus_status_assoc[]) { + { PB_TEMP_OT_WARNING, REGULATOR_ERROR_OVER_TEMP_WARN, + REGULATOR_EVENT_OVER_TEMP_WARN }, + { PB_TEMP_OT_FAULT, REGULATOR_ERROR_OVER_TEMP, + REGULATOR_EVENT_OVER_TEMP }, + { }, + }, + }, +}; + +static int _pmbus_is_enabled(struct i2c_client *client, u8 page) { - struct device *dev = rdev_get_dev(rdev); - struct i2c_client *client = to_i2c_client(dev->parent); - u8 page = rdev_get_id(rdev); int ret; - ret = pmbus_read_byte_data(client, page, PMBUS_OPERATION); + ret = _pmbus_read_byte_data(client, page, PMBUS_OPERATION); + if (ret < 0) return ret; return !!(ret & PB_OPERATION_CONTROL_ON); } +static int __maybe_unused pmbus_is_enabled(struct i2c_client *client, u8 page) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + int ret; + + mutex_lock(&data->update_lock); + ret = _pmbus_is_enabled(client, page); + mutex_unlock(&data->update_lock); + + return ret; +} + +#define to_dev_attr(_dev_attr) \ + container_of(_dev_attr, struct device_attribute, attr) + +static void pmbus_notify(struct pmbus_data *data, int page, int reg, int flags) +{ + int i; + + for (i = 0; i < data->num_attributes; i++) { + struct device_attribute *da = to_dev_attr(data->group.attrs[i]); + struct sensor_device_attribute *attr = to_sensor_dev_attr(da); + int index = attr->index; + u16 smask = pb_index_to_mask(index); + u8 spage = pb_index_to_page(index); + u16 sreg = pb_index_to_reg(index); + + if (reg == sreg && page == spage && (smask & flags)) { + dev_dbg(data->dev, "sysfs notify: %s", da->attr.name); + sysfs_notify(&data->dev->kobj, NULL, da->attr.name); + kobject_uevent(&data->dev->kobj, KOBJ_CHANGE); + flags &= ~smask; + } + + if (!flags) + break; + } +} + +static int _pmbus_get_flags(struct pmbus_data *data, u8 page, unsigned int *flags, + unsigned int *event, bool notify) +{ + int i, status; + const struct pmbus_status_category *cat; + const struct pmbus_status_assoc *bit; + struct device *dev = data->dev; + struct i2c_client *client = to_i2c_client(dev); + int func = data->info->func[page]; + + *flags = 0; + *event = 0; + + for (i = 0; i < ARRAY_SIZE(pmbus_status_flag_map); i++) { + cat = &pmbus_status_flag_map[i]; + if (!(func & cat->func)) + continue; + + status = _pmbus_read_byte_data(client, page, cat->reg); + if (status < 0) + return status; + + for (bit = cat->bits; bit->pflag; bit++) + if (status & bit->pflag) { + *flags |= bit->rflag; + *event |= bit->eflag; + } + + if (notify && status) + pmbus_notify(data, page, cat->reg, status); + } + + /* + * Map what bits of STATUS_{WORD,BYTE} we can to REGULATOR_ERROR_* + * bits. Some of the other bits are tempting (especially for cases + * where we don't have the relevant PMBUS_HAVE_STATUS_* + * functionality), but there's an unfortunate ambiguity in that + * they're defined as indicating a fault *or* a warning, so we can't + * easily determine whether to report REGULATOR_ERROR_<foo> or + * REGULATOR_ERROR_<foo>_WARN. + */ + status = pmbus_get_status(client, page, PMBUS_STATUS_WORD); + if (status < 0) + return status; + + if (_pmbus_is_enabled(client, page)) { + if (status & PB_STATUS_OFF) { + *flags |= REGULATOR_ERROR_FAIL; + *event |= REGULATOR_EVENT_FAIL; + } + + if (status & PB_STATUS_POWER_GOOD_N) { + *flags |= REGULATOR_ERROR_REGULATION_OUT; + *event |= REGULATOR_EVENT_REGULATION_OUT; + } + } + /* + * Unlike most other status bits, PB_STATUS_{IOUT_OC,VOUT_OV} are + * defined strictly as fault indicators (not warnings). + */ + if (status & PB_STATUS_IOUT_OC) { + *flags |= REGULATOR_ERROR_OVER_CURRENT; + *event |= REGULATOR_EVENT_OVER_CURRENT; + } + if (status & PB_STATUS_VOUT_OV) { + *flags |= REGULATOR_ERROR_REGULATION_OUT; + *event |= REGULATOR_EVENT_FAIL; + } + + /* + * If we haven't discovered any thermal faults or warnings via + * PMBUS_STATUS_TEMPERATURE, map PB_STATUS_TEMPERATURE to a warning as + * a (conservative) best-effort interpretation. + */ + if (!(*flags & (REGULATOR_ERROR_OVER_TEMP | REGULATOR_ERROR_OVER_TEMP_WARN)) && + (status & PB_STATUS_TEMPERATURE)) { + *flags |= REGULATOR_ERROR_OVER_TEMP_WARN; + *event |= REGULATOR_EVENT_OVER_TEMP_WARN; + } + + return 0; +} + +static int __maybe_unused pmbus_get_flags(struct pmbus_data *data, u8 page, unsigned int *flags, + unsigned int *event, bool notify) +{ + int ret; + + mutex_lock(&data->update_lock); + ret = _pmbus_get_flags(data, page, flags, event, notify); + mutex_unlock(&data->update_lock); + + return ret; +} + +#if IS_ENABLED(CONFIG_REGULATOR) +static int pmbus_regulator_is_enabled(struct regulator_dev *rdev) +{ + struct device *dev = rdev_get_dev(rdev); + struct i2c_client *client = to_i2c_client(dev->parent); + + return pmbus_is_enabled(client, rdev_get_id(rdev)); +} + static int _pmbus_regulator_on_off(struct regulator_dev *rdev, bool enable) { struct device *dev = rdev_get_dev(rdev); struct i2c_client *client = to_i2c_client(dev->parent); + struct pmbus_data *data = i2c_get_clientdata(client); u8 page = rdev_get_id(rdev); + int ret; + + mutex_lock(&data->update_lock); + ret = pmbus_update_byte_data(client, page, PMBUS_OPERATION, + PB_OPERATION_CONTROL_ON, + enable ? PB_OPERATION_CONTROL_ON : 0); + mutex_unlock(&data->update_lock); - return pmbus_update_byte_data(client, page, PMBUS_OPERATION, - PB_OPERATION_CONTROL_ON, - enable ? PB_OPERATION_CONTROL_ON : 0); + return ret; } static int pmbus_regulator_enable(struct regulator_dev *rdev) @@ -2272,21 +3060,239 @@ static int pmbus_regulator_disable(struct regulator_dev *rdev) return _pmbus_regulator_on_off(rdev, 0); } +static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned int *flags) +{ + struct device *dev = rdev_get_dev(rdev); + struct i2c_client *client = to_i2c_client(dev->parent); + struct pmbus_data *data = i2c_get_clientdata(client); + int event; + + return pmbus_get_flags(data, rdev_get_id(rdev), flags, &event, false); +} + +static int pmbus_regulator_get_status(struct regulator_dev *rdev) +{ + struct device *dev = rdev_get_dev(rdev); + struct i2c_client *client = to_i2c_client(dev->parent); + struct pmbus_data *data = i2c_get_clientdata(client); + u8 page = rdev_get_id(rdev); + int status, ret; + int event; + + mutex_lock(&data->update_lock); + status = pmbus_get_status(client, page, PMBUS_STATUS_WORD); + if (status < 0) { + ret = status; + goto unlock; + } + + if (status & PB_STATUS_OFF) { + ret = REGULATOR_STATUS_OFF; + goto unlock; + } + + /* If regulator is ON & reports power good then return ON */ + if (!(status & PB_STATUS_POWER_GOOD_N)) { + ret = REGULATOR_STATUS_ON; + goto unlock; + } + + ret = _pmbus_get_flags(data, rdev_get_id(rdev), &status, &event, false); + if (ret) + goto unlock; + + if (status & (REGULATOR_ERROR_UNDER_VOLTAGE | REGULATOR_ERROR_OVER_CURRENT | + REGULATOR_ERROR_REGULATION_OUT | REGULATOR_ERROR_FAIL | REGULATOR_ERROR_OVER_TEMP)) { + ret = REGULATOR_STATUS_ERROR; + goto unlock; + } + + ret = REGULATOR_STATUS_UNDEFINED; + +unlock: + mutex_unlock(&data->update_lock); + return ret; +} + +static int pmbus_regulator_get_low_margin(struct i2c_client *client, int page) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + struct pmbus_sensor s = { + .page = page, + .class = PSC_VOLTAGE_OUT, + .convert = true, + .data = -1, + }; + + if (data->vout_low[page] < 0) { + if (pmbus_check_word_register(client, page, PMBUS_MFR_VOUT_MIN)) + s.data = _pmbus_read_word_data(client, page, 0xff, + PMBUS_MFR_VOUT_MIN); + if (s.data < 0) { + s.data = _pmbus_read_word_data(client, page, 0xff, + PMBUS_VOUT_MARGIN_LOW); + if (s.data < 0) + return s.data; + } + data->vout_low[page] = pmbus_reg2data(data, &s); + } + + return data->vout_low[page]; +} + +static int pmbus_regulator_get_high_margin(struct i2c_client *client, int page) +{ + struct pmbus_data *data = i2c_get_clientdata(client); + struct pmbus_sensor s = { + .page = page, + .class = PSC_VOLTAGE_OUT, + .convert = true, + .data = -1, + }; + + if (data->vout_high[page] < 0) { + if (pmbus_check_word_register(client, page, PMBUS_MFR_VOUT_MAX)) + s.data = _pmbus_read_word_data(client, page, 0xff, + PMBUS_MFR_VOUT_MAX); + if (s.data < 0) { + s.data = _pmbus_read_word_data(client, page, 0xff, + PMBUS_VOUT_MARGIN_HIGH); + if (s.data < 0) + return s.data; + } + data->vout_high[page] = pmbus_reg2data(data, &s); + } + + return data->vout_high[page]; +} + +static int pmbus_regulator_get_voltage(struct regulator_dev *rdev) +{ + struct device *dev = rdev_get_dev(rdev); + struct i2c_client *client = to_i2c_client(dev->parent); + struct pmbus_data *data = i2c_get_clientdata(client); + struct pmbus_sensor s = { + .page = rdev_get_id(rdev), + .class = PSC_VOLTAGE_OUT, + .convert = true, + }; + + s.data = _pmbus_read_word_data(client, s.page, 0xff, PMBUS_READ_VOUT); + if (s.data < 0) + return s.data; + + return (int)pmbus_reg2data(data, &s) * 1000; /* unit is uV */ +} + +static int pmbus_regulator_set_voltage(struct regulator_dev *rdev, int min_uv, + int max_uv, unsigned int *selector) +{ + struct device *dev = rdev_get_dev(rdev); + struct i2c_client *client = to_i2c_client(dev->parent); + struct pmbus_data *data = i2c_get_clientdata(client); + struct pmbus_sensor s = { + .page = rdev_get_id(rdev), + .class = PSC_VOLTAGE_OUT, + .convert = true, + .data = -1, + }; + int val = DIV_ROUND_CLOSEST(min_uv, 1000); /* convert to mV */ + int low, high; + + *selector = 0; + + low = pmbus_regulator_get_low_margin(client, s.page); + if (low < 0) + return low; + + high = pmbus_regulator_get_high_margin(client, s.page); + if (high < 0) + return high; + + /* Make sure we are within margins */ + if (low > val) + val = low; + if (high < val) + val = high; + + val = pmbus_data2reg(data, &s, val); + + return _pmbus_write_word_data(client, s.page, PMBUS_VOUT_COMMAND, (u16)val); +} + +static int pmbus_regulator_list_voltage(struct regulator_dev *rdev, + unsigned int selector) +{ + struct device *dev = rdev_get_dev(rdev); + struct i2c_client *client = to_i2c_client(dev->parent); + struct pmbus_data *data = i2c_get_clientdata(client); + int val, low, high; + + if (data->flags & PMBUS_VOUT_PROTECTED) + return 0; + + if (selector >= rdev->desc->n_voltages || + selector < rdev->desc->linear_min_sel) + return -EINVAL; + + selector -= rdev->desc->linear_min_sel; + val = DIV_ROUND_CLOSEST(rdev->desc->min_uV + + (rdev->desc->uV_step * selector), 1000); /* convert to mV */ + + low = pmbus_regulator_get_low_margin(client, rdev_get_id(rdev)); + if (low < 0) + return low; + + high = pmbus_regulator_get_high_margin(client, rdev_get_id(rdev)); + if (high < 0) + return high; + + if (val >= low && val <= high) + return val * 1000; /* unit is uV */ + + return 0; +} + const struct regulator_ops pmbus_regulator_ops = { .enable = pmbus_regulator_enable, .disable = pmbus_regulator_disable, .is_enabled = pmbus_regulator_is_enabled, + .get_error_flags = pmbus_regulator_get_error_flags, + .get_status = pmbus_regulator_get_status, + .get_voltage = pmbus_regulator_get_voltage, + .set_voltage = pmbus_regulator_set_voltage, + .list_voltage = pmbus_regulator_list_voltage, }; -EXPORT_SYMBOL_GPL(pmbus_regulator_ops); +EXPORT_SYMBOL_NS_GPL(pmbus_regulator_ops, "PMBUS"); + +int pmbus_regulator_init_cb(struct regulator_dev *rdev, + struct regulator_config *config) +{ + struct pmbus_data *data = config->driver_data; + struct regulation_constraints *constraints = rdev->constraints; + + if (data->flags & PMBUS_OP_PROTECTED) + constraints->valid_ops_mask &= ~REGULATOR_CHANGE_STATUS; + + if (data->flags & PMBUS_VOUT_PROTECTED) + constraints->valid_ops_mask &= ~REGULATOR_CHANGE_VOLTAGE; + + return 0; +} +EXPORT_SYMBOL_NS_GPL(pmbus_regulator_init_cb, "PMBUS"); static int pmbus_regulator_register(struct pmbus_data *data) { struct device *dev = data->dev; const struct pmbus_driver_info *info = data->info; const struct pmbus_platform_data *pdata = dev_get_platdata(dev); - struct regulator_dev *rdev; int i; + data->rdevs = devm_kzalloc(dev, sizeof(struct regulator_dev *) * info->num_regulators, + GFP_KERNEL); + if (!data->rdevs) + return -ENOMEM; + for (i = 0; i < info->num_regulators; i++) { struct regulator_config config = { }; @@ -2296,33 +3302,134 @@ static int pmbus_regulator_register(struct pmbus_data *data) if (pdata && pdata->reg_init_data) config.init_data = &pdata->reg_init_data[i]; - rdev = devm_regulator_register(dev, &info->reg_desc[i], - &config); - if (IS_ERR(rdev)) { - dev_err(dev, "Failed to register %s regulator\n", - info->reg_desc[i].name); - return PTR_ERR(rdev); - } + data->rdevs[i] = devm_regulator_register(dev, &info->reg_desc[i], + &config); + if (IS_ERR(data->rdevs[i])) + return dev_err_probe(dev, PTR_ERR(data->rdevs[i]), + "Failed to register %s regulator\n", + info->reg_desc[i].name); } return 0; } + +static void pmbus_regulator_notify(struct pmbus_data *data, int page, int event) +{ + int j; + + for (j = 0; j < data->info->num_regulators; j++) { + if (page == rdev_get_id(data->rdevs[j])) { + regulator_notifier_call_chain(data->rdevs[j], event, NULL); + break; + } + } +} #else static int pmbus_regulator_register(struct pmbus_data *data) { return 0; } + +static void pmbus_regulator_notify(struct pmbus_data *data, int page, int event) +{ +} #endif +static int pmbus_write_smbalert_mask(struct i2c_client *client, u8 page, u8 reg, u8 val) +{ + int ret; + + ret = _pmbus_write_word_data(client, page, PMBUS_SMBALERT_MASK, reg | (val << 8)); + + /* + * Clear fault systematically in case writing PMBUS_SMBALERT_MASK + * is not supported by the chip. + */ + pmbus_clear_fault_page(client, page); + + return ret; +} + +static irqreturn_t pmbus_fault_handler(int irq, void *pdata) +{ + struct pmbus_data *data = pdata; + struct i2c_client *client = to_i2c_client(data->dev); + int i, status, event; + + mutex_lock(&data->update_lock); + for (i = 0; i < data->info->pages; i++) { + _pmbus_get_flags(data, i, &status, &event, true); + + if (event) + pmbus_regulator_notify(data, i, event); + } + + pmbus_clear_faults(client); + mutex_unlock(&data->update_lock); + + return IRQ_HANDLED; +} + +static int pmbus_irq_setup(struct i2c_client *client, struct pmbus_data *data) +{ + struct device *dev = &client->dev; + const struct pmbus_status_category *cat; + const struct pmbus_status_assoc *bit; + int i, j, err, func; + u8 mask; + + static const u8 misc_status[] = {PMBUS_STATUS_CML, PMBUS_STATUS_OTHER, + PMBUS_STATUS_MFR_SPECIFIC, PMBUS_STATUS_FAN_12, + PMBUS_STATUS_FAN_34}; + + if (!client->irq) + return 0; + + for (i = 0; i < data->info->pages; i++) { + func = data->info->func[i]; + + for (j = 0; j < ARRAY_SIZE(pmbus_status_flag_map); j++) { + cat = &pmbus_status_flag_map[j]; + if (!(func & cat->func)) + continue; + mask = 0; + for (bit = cat->bits; bit->pflag; bit++) + mask |= bit->pflag; + + err = pmbus_write_smbalert_mask(client, i, cat->reg, ~mask); + if (err) + dev_dbg_once(dev, "Failed to set smbalert for reg 0x%02x\n", + cat->reg); + } + + for (j = 0; j < ARRAY_SIZE(misc_status); j++) + pmbus_write_smbalert_mask(client, i, misc_status[j], 0xff); + } + + /* Register notifiers */ + err = devm_request_threaded_irq(dev, client->irq, NULL, pmbus_fault_handler, + IRQF_ONESHOT, "pmbus-irq", data); + if (err) { + dev_err(dev, "failed to request an irq %d\n", err); + return err; + } + + return 0; +} + static struct dentry *pmbus_debugfs_dir; /* pmbus debugfs directory */ -#if IS_ENABLED(CONFIG_DEBUG_FS) static int pmbus_debugfs_get(void *data, u64 *val) { int rc; struct pmbus_debugfs_entry *entry = data; + struct pmbus_data *pdata = i2c_get_clientdata(entry->client); + rc = mutex_lock_interruptible(&pdata->update_lock); + if (rc) + return rc; rc = _pmbus_read_byte_data(entry->client, entry->page, entry->reg); + mutex_unlock(&pdata->update_lock); if (rc < 0) return rc; @@ -2339,7 +3446,11 @@ static int pmbus_debugfs_get_status(void *data, u64 *val) struct pmbus_debugfs_entry *entry = data; struct pmbus_data *pdata = i2c_get_clientdata(entry->client); + rc = mutex_lock_interruptible(&pdata->update_lock); + if (rc) + return rc; rc = pdata->read_status(entry->client, entry->page); + mutex_unlock(&pdata->update_lock); if (rc < 0) return rc; @@ -2350,156 +3461,204 @@ static int pmbus_debugfs_get_status(void *data, u64 *val) DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops_status, pmbus_debugfs_get_status, NULL, "0x%04llx\n"); -static int pmbus_init_debugfs(struct i2c_client *client, - struct pmbus_data *data) +static ssize_t pmbus_debugfs_block_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) { - int i, idx = 0; - char name[PMBUS_NAME_SIZE]; - struct pmbus_debugfs_entry *entries; + int rc; + struct pmbus_debugfs_entry *entry = file->private_data; + struct pmbus_data *pdata = i2c_get_clientdata(entry->client); + char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 }; - if (!pmbus_debugfs_dir) - return -ENODEV; + rc = mutex_lock_interruptible(&pdata->update_lock); + if (rc) + return rc; + rc = pmbus_read_block_data(entry->client, entry->page, entry->reg, + data); + mutex_unlock(&pdata->update_lock); + if (rc < 0) + return rc; - /* - * Create the debugfs directory for this device. Use the hwmon device - * name to avoid conflicts (hwmon numbers are globally unique). - */ - data->debugfs = debugfs_create_dir(dev_name(data->hwmon_dev), - pmbus_debugfs_dir); - if (IS_ERR_OR_NULL(data->debugfs)) { - data->debugfs = NULL; - return -ENODEV; - } + /* Add newline at the end of a read data */ + data[rc] = '\n'; - /* Allocate the max possible entries we need. */ - entries = devm_kcalloc(data->dev, - data->info->pages * 10, sizeof(*entries), - GFP_KERNEL); - if (!entries) - return -ENOMEM; + /* Include newline into the length */ + rc += 1; - for (i = 0; i < data->info->pages; ++i) { - /* Check accessibility of status register if it's not page 0 */ - if (!i || pmbus_check_status_register(client, i)) { - /* No need to set reg as we have special read op. */ - entries[idx].client = client; - entries[idx].page = i; - scnprintf(name, PMBUS_NAME_SIZE, "status%d", i); - debugfs_create_file(name, 0444, data->debugfs, - &entries[idx++], - &pmbus_debugfs_ops_status); - } + return simple_read_from_buffer(buf, count, ppos, data, rc); +} - if (data->info->func[i] & PMBUS_HAVE_STATUS_VOUT) { - entries[idx].client = client; - entries[idx].page = i; - entries[idx].reg = PMBUS_STATUS_VOUT; - scnprintf(name, PMBUS_NAME_SIZE, "status%d_vout", i); - debugfs_create_file(name, 0444, data->debugfs, - &entries[idx++], - &pmbus_debugfs_ops); - } +static const struct file_operations pmbus_debugfs_block_ops = { + .llseek = noop_llseek, + .read = pmbus_debugfs_block_read, + .write = NULL, + .open = simple_open, +}; - if (data->info->func[i] & PMBUS_HAVE_STATUS_IOUT) { - entries[idx].client = client; - entries[idx].page = i; - entries[idx].reg = PMBUS_STATUS_IOUT; - scnprintf(name, PMBUS_NAME_SIZE, "status%d_iout", i); - debugfs_create_file(name, 0444, data->debugfs, - &entries[idx++], - &pmbus_debugfs_ops); - } +static void pmbus_remove_symlink(void *symlink) +{ + debugfs_remove(symlink); +} - if (data->info->func[i] & PMBUS_HAVE_STATUS_INPUT) { - entries[idx].client = client; - entries[idx].page = i; - entries[idx].reg = PMBUS_STATUS_INPUT; - scnprintf(name, PMBUS_NAME_SIZE, "status%d_input", i); - debugfs_create_file(name, 0444, data->debugfs, - &entries[idx++], - &pmbus_debugfs_ops); - } +struct pmbus_debugfs_data { + u8 reg; + u32 flag; + const char *name; +}; - if (data->info->func[i] & PMBUS_HAVE_STATUS_TEMP) { - entries[idx].client = client; - entries[idx].page = i; - entries[idx].reg = PMBUS_STATUS_TEMPERATURE; - scnprintf(name, PMBUS_NAME_SIZE, "status%d_temp", i); - debugfs_create_file(name, 0444, data->debugfs, - &entries[idx++], - &pmbus_debugfs_ops); - } +static const struct pmbus_debugfs_data pmbus_debugfs_block_data[] = { + { .reg = PMBUS_MFR_ID, .name = "mfr_id" }, + { .reg = PMBUS_MFR_MODEL, .name = "mfr_model" }, + { .reg = PMBUS_MFR_REVISION, .name = "mfr_revision" }, + { .reg = PMBUS_MFR_LOCATION, .name = "mfr_location" }, + { .reg = PMBUS_MFR_DATE, .name = "mfr_date" }, + { .reg = PMBUS_MFR_SERIAL, .name = "mfr_serial" }, +}; - if (pmbus_check_byte_register(client, i, PMBUS_STATUS_CML)) { - entries[idx].client = client; - entries[idx].page = i; - entries[idx].reg = PMBUS_STATUS_CML; - scnprintf(name, PMBUS_NAME_SIZE, "status%d_cml", i); - debugfs_create_file(name, 0444, data->debugfs, - &entries[idx++], - &pmbus_debugfs_ops); - } +static const struct pmbus_debugfs_data pmbus_debugfs_status_data[] = { + { .reg = PMBUS_STATUS_VOUT, .flag = PMBUS_HAVE_STATUS_VOUT, .name = "status%d_vout" }, + { .reg = PMBUS_STATUS_IOUT, .flag = PMBUS_HAVE_STATUS_IOUT, .name = "status%d_iout" }, + { .reg = PMBUS_STATUS_INPUT, .flag = PMBUS_HAVE_STATUS_INPUT, .name = "status%d_input" }, + { .reg = PMBUS_STATUS_TEMPERATURE, .flag = PMBUS_HAVE_STATUS_TEMP, + .name = "status%d_temp" }, + { .reg = PMBUS_STATUS_FAN_12, .flag = PMBUS_HAVE_STATUS_FAN12, .name = "status%d_fan12" }, + { .reg = PMBUS_STATUS_FAN_34, .flag = PMBUS_HAVE_STATUS_FAN34, .name = "status%d_fan34" }, + { .reg = PMBUS_STATUS_CML, .name = "status%d_cml" }, + { .reg = PMBUS_STATUS_OTHER, .name = "status%d_other" }, + { .reg = PMBUS_STATUS_MFR_SPECIFIC, .name = "status%d_mfr" }, +}; - if (pmbus_check_byte_register(client, i, PMBUS_STATUS_OTHER)) { - entries[idx].client = client; - entries[idx].page = i; - entries[idx].reg = PMBUS_STATUS_OTHER; - scnprintf(name, PMBUS_NAME_SIZE, "status%d_other", i); - debugfs_create_file(name, 0444, data->debugfs, - &entries[idx++], - &pmbus_debugfs_ops); - } +static void pmbus_init_debugfs(struct i2c_client *client, + struct pmbus_data *data) +{ + struct dentry *symlink_d, *debugfs = client->debugfs; + struct pmbus_debugfs_entry *entries; + const char *pathname, *symlink; + char name[PMBUS_NAME_SIZE]; + int page, i, idx = 0; + + /* + * client->debugfs may be NULL or an ERR_PTR(). dentry_path_raw() + * does not check if its parameters are valid, so validate + * client->debugfs before using it. + */ + if (!pmbus_debugfs_dir || IS_ERR_OR_NULL(debugfs)) + return; + + /* + * Backwards compatibility: Create symlink from /pmbus/<hwmon_device> + * to i2c debugfs directory. + */ + pathname = dentry_path_raw(debugfs, name, sizeof(name)); + if (IS_ERR(pathname)) + return; - if (pmbus_check_byte_register(client, i, - PMBUS_STATUS_MFR_SPECIFIC)) { + /* + * The path returned by dentry_path_raw() starts with '/'. Prepend it + * with ".." to get the symlink relative to the pmbus root directory. + */ + symlink = kasprintf(GFP_KERNEL, "..%s", pathname); + if (!symlink) + return; + + symlink_d = debugfs_create_symlink(dev_name(data->hwmon_dev), + pmbus_debugfs_dir, symlink); + kfree(symlink); + + devm_add_action_or_reset(data->dev, pmbus_remove_symlink, symlink_d); + + /* + * Allocate the max possible entries we need. + * device specific: + * ARRAY_SIZE(pmbus_debugfs_block_data) + 2 + * page specific: + * ARRAY_SIZE(pmbus_debugfs_status_data) + 1 + */ + entries = devm_kcalloc(data->dev, + ARRAY_SIZE(pmbus_debugfs_block_data) + 2 + + data->info->pages * (ARRAY_SIZE(pmbus_debugfs_status_data) + 1), + sizeof(*entries), GFP_KERNEL); + if (!entries) + return; + + /* + * Add device-specific entries. + * Please note that the PMBUS standard allows all registers to be + * page-specific. + * To reduce the number of debugfs entries for devices with many pages + * assume that values of the following registers are the same for all + * pages and report values only for page 0. + */ + if (!(data->flags & PMBUS_NO_CAPABILITY) && + pmbus_check_byte_register(client, 0, PMBUS_CAPABILITY)) { + entries[idx].client = client; + entries[idx].page = 0; + entries[idx].reg = PMBUS_CAPABILITY; + debugfs_create_file("capability", 0444, debugfs, + &entries[idx++], + &pmbus_debugfs_ops); + } + if (pmbus_check_byte_register(client, 0, PMBUS_REVISION)) { + entries[idx].client = client; + entries[idx].page = 0; + entries[idx].reg = PMBUS_REVISION; + debugfs_create_file("pmbus_revision", 0444, debugfs, + &entries[idx++], + &pmbus_debugfs_ops); + } + + for (i = 0; i < ARRAY_SIZE(pmbus_debugfs_block_data); i++) { + const struct pmbus_debugfs_data *d = &pmbus_debugfs_block_data[i]; + + if (pmbus_check_block_register(client, 0, d->reg)) { entries[idx].client = client; - entries[idx].page = i; - entries[idx].reg = PMBUS_STATUS_MFR_SPECIFIC; - scnprintf(name, PMBUS_NAME_SIZE, "status%d_mfr", i); - debugfs_create_file(name, 0444, data->debugfs, + entries[idx].page = 0; + entries[idx].reg = d->reg; + debugfs_create_file(d->name, 0444, debugfs, &entries[idx++], - &pmbus_debugfs_ops); + &pmbus_debugfs_block_ops); } + } - if (data->info->func[i] & PMBUS_HAVE_STATUS_FAN12) { + /* Add page specific entries */ + for (page = 0; page < data->info->pages; ++page) { + /* Check accessibility of status register if it's not page 0 */ + if (!page || pmbus_check_status_register(client, page)) { + /* No need to set reg as we have special read op. */ entries[idx].client = client; - entries[idx].page = i; - entries[idx].reg = PMBUS_STATUS_FAN_12; - scnprintf(name, PMBUS_NAME_SIZE, "status%d_fan12", i); - debugfs_create_file(name, 0444, data->debugfs, + entries[idx].page = page; + scnprintf(name, PMBUS_NAME_SIZE, "status%d", page); + debugfs_create_file(name, 0444, debugfs, &entries[idx++], - &pmbus_debugfs_ops); + &pmbus_debugfs_ops_status); } - if (data->info->func[i] & PMBUS_HAVE_STATUS_FAN34) { - entries[idx].client = client; - entries[idx].page = i; - entries[idx].reg = PMBUS_STATUS_FAN_34; - scnprintf(name, PMBUS_NAME_SIZE, "status%d_fan34", i); - debugfs_create_file(name, 0444, data->debugfs, - &entries[idx++], - &pmbus_debugfs_ops); + for (i = 0; i < ARRAY_SIZE(pmbus_debugfs_status_data); i++) { + const struct pmbus_debugfs_data *d = + &pmbus_debugfs_status_data[i]; + + if ((data->info->func[page] & d->flag) || + (!d->flag && pmbus_check_byte_register(client, page, d->reg))) { + entries[idx].client = client; + entries[idx].page = page; + entries[idx].reg = d->reg; + scnprintf(name, PMBUS_NAME_SIZE, d->name, page); + debugfs_create_file(name, 0444, debugfs, + &entries[idx++], + &pmbus_debugfs_ops); + } } } - - return 0; } -#else -static int pmbus_init_debugfs(struct i2c_client *client, - struct pmbus_data *data) -{ - return 0; -} -#endif /* IS_ENABLED(CONFIG_DEBUG_FS) */ -int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id, - struct pmbus_driver_info *info) +int pmbus_do_probe(struct i2c_client *client, struct pmbus_driver_info *info) { struct device *dev = &client->dev; const struct pmbus_platform_data *pdata = dev_get_platdata(dev); struct pmbus_data *data; size_t groups_num = 0; int ret; + int i; + char *name; if (!info) return -ENODEV; @@ -2532,13 +3691,18 @@ int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id, data->currpage = -1; data->currphase = -1; + for (i = 0; i < ARRAY_SIZE(data->vout_low); i++) { + data->vout_low[i] = -1; + data->vout_high[i] = -1; + } + ret = pmbus_init_common(client, data, info); if (ret < 0) return ret; ret = pmbus_find_attributes(client, data); if (ret) - goto out_kfree; + return ret; /* * If there are no attributes, something is wrong. @@ -2546,57 +3710,66 @@ int pmbus_do_probe(struct i2c_client *client, const struct i2c_device_id *id, */ if (!data->num_attributes) { dev_err(dev, "No attributes found\n"); - ret = -ENODEV; - goto out_kfree; + return -ENODEV; } + name = devm_kstrdup(dev, client->name, GFP_KERNEL); + if (!name) + return -ENOMEM; + strreplace(name, '-', '_'); + data->groups[0] = &data->group; memcpy(data->groups + 1, info->groups, sizeof(void *) * groups_num); - data->hwmon_dev = hwmon_device_register_with_groups(dev, client->name, - data, data->groups); + data->hwmon_dev = devm_hwmon_device_register_with_groups(dev, name, + data, data->groups); if (IS_ERR(data->hwmon_dev)) { - ret = PTR_ERR(data->hwmon_dev); dev_err(dev, "Failed to register hwmon device\n"); - goto out_kfree; + return PTR_ERR(data->hwmon_dev); } ret = pmbus_regulator_register(data); if (ret) - goto out_unregister; + return ret; - ret = pmbus_init_debugfs(client, data); + ret = pmbus_irq_setup(client, data); if (ret) - dev_warn(dev, "Failed to register debugfs\n"); + return ret; + + pmbus_init_debugfs(client, data); return 0; +} +EXPORT_SYMBOL_NS_GPL(pmbus_do_probe, "PMBUS"); -out_unregister: - hwmon_device_unregister(data->hwmon_dev); -out_kfree: - kfree(data->group.attrs); - return ret; +struct dentry *pmbus_get_debugfs_dir(struct i2c_client *client) +{ + /* + * client->debugfs may be an ERR_PTR(). Returning that to + * the calling code would potentially require additional + * complexity in the calling code and otherwise add no + * value. Return NULL in that case. + */ + if (IS_ERR_OR_NULL(client->debugfs)) + return NULL; + return client->debugfs; } -EXPORT_SYMBOL_GPL(pmbus_do_probe); +EXPORT_SYMBOL_NS_GPL(pmbus_get_debugfs_dir, "PMBUS"); -int pmbus_do_remove(struct i2c_client *client) +int pmbus_lock_interruptible(struct i2c_client *client) { struct pmbus_data *data = i2c_get_clientdata(client); - debugfs_remove_recursive(data->debugfs); - - hwmon_device_unregister(data->hwmon_dev); - kfree(data->group.attrs); - return 0; + return mutex_lock_interruptible(&data->update_lock); } -EXPORT_SYMBOL_GPL(pmbus_do_remove); +EXPORT_SYMBOL_NS_GPL(pmbus_lock_interruptible, "PMBUS"); -struct dentry *pmbus_get_debugfs_dir(struct i2c_client *client) +void pmbus_unlock(struct i2c_client *client) { struct pmbus_data *data = i2c_get_clientdata(client); - return data->debugfs; + mutex_unlock(&data->update_lock); } -EXPORT_SYMBOL_GPL(pmbus_get_debugfs_dir); +EXPORT_SYMBOL_NS_GPL(pmbus_unlock, "PMBUS"); static int __init pmbus_core_init(void) { |