diff options
Diffstat (limited to 'drivers/hwmon/lm95245.c')
| -rw-r--r-- | drivers/hwmon/lm95245.c | 697 |
1 files changed, 374 insertions, 323 deletions
diff --git a/drivers/hwmon/lm95245.c b/drivers/hwmon/lm95245.c index a6c85f0ff8f3..9ed300c6b5f7 100644 --- a/drivers/hwmon/lm95245.c +++ b/drivers/hwmon/lm95245.c @@ -1,40 +1,20 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2011 Alexander Stein <alexander.stein@systec-electronic.com> * - * The LM95245 is a sensor chip made by National Semiconductors. + * The LM95245 is a sensor chip made by TI / National Semiconductor. * It reports up to two temperatures (its own plus an external one). - * Complete datasheet can be obtained from National's website at: - * http://www.national.com/ds.cgi/LM/LM95245.pdf * * This driver is based on lm95241.c - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ -#include <linux/module.h> +#include <linux/err.h> #include <linux/init.h> -#include <linux/slab.h> -#include <linux/jiffies.h> -#include <linux/i2c.h> #include <linux/hwmon.h> -#include <linux/hwmon-sysfs.h> -#include <linux/err.h> -#include <linux/mutex.h> -#include <linux/sysfs.h> - -#define DEVNAME "lm95245" +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/slab.h> static const unsigned short normal_i2c[] = { 0x18, 0x19, 0x29, 0x4c, 0x4d, I2C_CLIENT_END }; @@ -93,36 +73,19 @@ static const unsigned short normal_i2c[] = { #define RATE_CR1000 0x02 #define RATE_CR2500 0x03 +#define STATUS1_ROS 0x10 #define STATUS1_DIODE_FAULT 0x04 #define STATUS1_RTCRIT 0x02 #define STATUS1_LOC 0x01 #define MANUFACTURER_ID 0x01 -#define DEFAULT_REVISION 0xB3 - -static const u8 lm95245_reg_address[] = { - LM95245_REG_R_LOCAL_TEMPH_S, - LM95245_REG_R_LOCAL_TEMPL_S, - LM95245_REG_R_REMOTE_TEMPH_S, - LM95245_REG_R_REMOTE_TEMPL_S, - LM95245_REG_R_REMOTE_TEMPH_U, - LM95245_REG_R_REMOTE_TEMPL_U, - LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT, - LM95245_REG_RW_REMOTE_TCRIT_LIMIT, - LM95245_REG_RW_COMMON_HYSTERESIS, - LM95245_REG_R_STATUS1, -}; +#define LM95235_REVISION 0xB1 +#define LM95245_REVISION 0xB3 /* Client data (each client gets its own) */ struct lm95245_data { - struct device *hwmon_dev; - struct mutex update_lock; - unsigned long last_updated; /* in jiffies */ - unsigned long interval; /* in msecs */ - bool valid; /* zero until following fields are valid */ - /* registers values */ - u8 regs[ARRAY_SIZE(lm95245_reg_address)]; - u8 config1, config2; + struct regmap *regmap; + int interval; /* in msecs */ }; /* Conversions */ @@ -138,61 +101,36 @@ static int temp_from_reg_signed(u8 val_h, u8 val_l) return temp_from_reg_unsigned(val_h, val_l); } -static struct lm95245_data *lm95245_update_device(struct device *dev) -{ - struct i2c_client *client = to_i2c_client(dev); - struct lm95245_data *data = i2c_get_clientdata(client); - - mutex_lock(&data->update_lock); - - if (time_after(jiffies, data->last_updated - + msecs_to_jiffies(data->interval)) || !data->valid) { - int i; - - dev_dbg(&client->dev, "Updating lm95245 data.\n"); - for (i = 0; i < ARRAY_SIZE(lm95245_reg_address); i++) - data->regs[i] - = i2c_smbus_read_byte_data(client, - lm95245_reg_address[i]); - data->last_updated = jiffies; - data->valid = 1; - } - - mutex_unlock(&data->update_lock); - - return data; -} - -static unsigned long lm95245_read_conversion_rate(struct i2c_client *client) +static int lm95245_read_conversion_rate(struct lm95245_data *data) { - int rate; - unsigned long interval; + unsigned int rate; + int ret; - rate = i2c_smbus_read_byte_data(client, LM95245_REG_RW_CONVERS_RATE); + ret = regmap_read(data->regmap, LM95245_REG_RW_CONVERS_RATE, &rate); + if (ret < 0) + return ret; switch (rate) { case RATE_CR0063: - interval = 63; + data->interval = 63; break; case RATE_CR0364: - interval = 364; + data->interval = 364; break; case RATE_CR1000: - interval = 1000; + data->interval = 1000; break; case RATE_CR2500: default: - interval = 2500; + data->interval = 2500; break; } - - return interval; + return 0; } -static unsigned long lm95245_set_conversion_rate(struct i2c_client *client, - unsigned long interval) +static int lm95245_set_conversion_rate(struct lm95245_data *data, long interval) { - int rate; + int ret, rate; if (interval <= 63) { interval = 63; @@ -208,313 +146,426 @@ static unsigned long lm95245_set_conversion_rate(struct i2c_client *client, rate = RATE_CR2500; } - i2c_smbus_write_byte_data(client, LM95245_REG_RW_CONVERS_RATE, rate); + ret = regmap_write(data->regmap, LM95245_REG_RW_CONVERS_RATE, rate); + if (ret < 0) + return ret; - return interval; -} - -/* Sysfs stuff */ -static ssize_t show_input(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct lm95245_data *data = lm95245_update_device(dev); - int temp; - int index = to_sensor_dev_attr(attr)->index; - - /* - * Index 0 (Local temp) is always signed - * Index 2 (Remote temp) has both signed and unsigned data - * use signed calculation for remote if signed bit is set - */ - if (index == 0 || data->regs[index] & 0x80) - temp = temp_from_reg_signed(data->regs[index], - data->regs[index + 1]); - else - temp = temp_from_reg_unsigned(data->regs[index + 2], - data->regs[index + 3]); - - return snprintf(buf, PAGE_SIZE - 1, "%d\n", temp); + data->interval = interval; + return 0; } -static ssize_t show_limit(struct device *dev, struct device_attribute *attr, - char *buf) +static int lm95245_read_temp(struct device *dev, u32 attr, int channel, + long *val) { - struct lm95245_data *data = lm95245_update_device(dev); - int index = to_sensor_dev_attr(attr)->index; - - return snprintf(buf, PAGE_SIZE - 1, "%d\n", - data->regs[index] * 1000); + struct lm95245_data *data = dev_get_drvdata(dev); + struct regmap *regmap = data->regmap; + unsigned int regs[2]; + unsigned int regval; + u8 regvals[2]; + int ret; + + switch (attr) { + case hwmon_temp_input: + regs[0] = channel ? LM95245_REG_R_REMOTE_TEMPL_S : + LM95245_REG_R_LOCAL_TEMPL_S; + regs[1] = channel ? LM95245_REG_R_REMOTE_TEMPH_S : + LM95245_REG_R_LOCAL_TEMPH_S; + ret = regmap_multi_reg_read(regmap, regs, regvals, 2); + if (ret < 0) + return ret; + /* + * Local temp is always signed. + * Remote temp has both signed and unsigned data. + * Use signed calculation for remote if signed bit is set + * or if reported temperature is below signed limit. + */ + if (!channel || (regvals[1] & 0x80) || regvals[1] < 0x7f) { + *val = temp_from_reg_signed(regvals[1], regvals[0]); + return 0; + } + ret = regmap_bulk_read(regmap, LM95245_REG_R_REMOTE_TEMPH_U, regvals, 2); + if (ret) + return ret; + *val = temp_from_reg_unsigned(regvals[0], regvals[1]); + return 0; + case hwmon_temp_max: + ret = regmap_read(regmap, LM95245_REG_RW_REMOTE_OS_LIMIT, + ®val); + if (ret < 0) + return ret; + *val = regval * 1000; + return 0; + case hwmon_temp_crit: + regs[0] = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT : + LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT; + ret = regmap_read(regmap, regs[0], ®val); + if (ret < 0) + return ret; + *val = regval * 1000; + return 0; + case hwmon_temp_max_hyst: + regs[0] = LM95245_REG_RW_REMOTE_OS_LIMIT; + regs[1] = LM95245_REG_RW_COMMON_HYSTERESIS; + ret = regmap_multi_reg_read(regmap, regs, regvals, 2); + if (ret < 0) + return ret; + *val = (regvals[0] - regvals[1]) * 1000; + return 0; + case hwmon_temp_crit_hyst: + regs[0] = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT : + LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT; + regs[1] = LM95245_REG_RW_COMMON_HYSTERESIS; + + ret = regmap_multi_reg_read(regmap, regs, regvals, 2); + if (ret < 0) + return ret; + *val = (regvals[0] - regvals[1]) * 1000; + return 0; + case hwmon_temp_type: + ret = regmap_read(regmap, LM95245_REG_RW_CONFIG2, ®val); + if (ret < 0) + return ret; + *val = (regval & CFG2_REMOTE_TT) ? 1 : 2; + return 0; + case hwmon_temp_offset: + ret = regmap_bulk_read(regmap, LM95245_REG_RW_REMOTE_OFFH, regvals, 2); + if (ret < 0) + return ret; + *val = temp_from_reg_signed(regvals[0], regvals[1]); + return 0; + case hwmon_temp_max_alarm: + ret = regmap_read(regmap, LM95245_REG_R_STATUS1, ®val); + if (ret < 0) + return ret; + *val = !!(regval & STATUS1_ROS); + return 0; + case hwmon_temp_crit_alarm: + ret = regmap_read(regmap, LM95245_REG_R_STATUS1, ®val); + if (ret < 0) + return ret; + *val = !!(regval & (channel ? STATUS1_RTCRIT : STATUS1_LOC)); + return 0; + case hwmon_temp_fault: + ret = regmap_read(regmap, LM95245_REG_R_STATUS1, ®val); + if (ret < 0) + return ret; + *val = !!(regval & STATUS1_DIODE_FAULT); + return 0; + default: + return -EOPNOTSUPP; + } } -static ssize_t set_limit(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +static int lm95245_write_temp(struct device *dev, u32 attr, int channel, + long val) { - struct i2c_client *client = to_i2c_client(dev); - struct lm95245_data *data = i2c_get_clientdata(client); - int index = to_sensor_dev_attr(attr)->index; - unsigned long val; - - if (kstrtoul(buf, 10, &val) < 0) - return -EINVAL; - - val /= 1000; - - val = clamp_val(val, 0, (index == 6 ? 127 : 255)); - - mutex_lock(&data->update_lock); - - data->valid = 0; - - i2c_smbus_write_byte_data(client, lm95245_reg_address[index], val); - - mutex_unlock(&data->update_lock); - - return count; + struct lm95245_data *data = dev_get_drvdata(dev); + struct regmap *regmap = data->regmap; + unsigned int regval; + u8 regvals[2]; + int ret, reg; + + switch (attr) { + case hwmon_temp_max: + val = clamp_val(val / 1000, 0, 255); + ret = regmap_write(regmap, LM95245_REG_RW_REMOTE_OS_LIMIT, val); + return ret; + case hwmon_temp_crit: + reg = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT : + LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT; + val = clamp_val(val / 1000, 0, channel ? 255 : 127); + ret = regmap_write(regmap, reg, val); + return ret; + case hwmon_temp_crit_hyst: + ret = regmap_read(regmap, LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT, + ®val); + if (ret < 0) + return ret; + /* Clamp to reasonable range to prevent overflow */ + val = clamp_val(val, -1000000, 1000000); + val = regval - val / 1000; + val = clamp_val(val, 0, 31); + ret = regmap_write(regmap, LM95245_REG_RW_COMMON_HYSTERESIS, + val); + return ret; + case hwmon_temp_offset: + val = clamp_val(val, -128000, 127875); + val = val * 256 / 1000; + regvals[0] = val >> 8; + regvals[1] = val & 0xe0; + + ret = regmap_bulk_write(regmap, LM95245_REG_RW_REMOTE_OFFH, regvals, 2); + return ret; + case hwmon_temp_type: + if (val != 1 && val != 2) + return -EINVAL; + ret = regmap_update_bits(regmap, LM95245_REG_RW_CONFIG2, + CFG2_REMOTE_TT, + val == 1 ? CFG2_REMOTE_TT : 0); + return ret; + default: + return -EOPNOTSUPP; + } } -static ssize_t set_crit_hyst(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +static int lm95245_read_chip(struct device *dev, u32 attr, int channel, + long *val) { - struct i2c_client *client = to_i2c_client(dev); - struct lm95245_data *data = i2c_get_clientdata(client); - unsigned long val; - - if (kstrtoul(buf, 10, &val) < 0) - return -EINVAL; - - val /= 1000; + struct lm95245_data *data = dev_get_drvdata(dev); - val = clamp_val(val, 0, 31); - - mutex_lock(&data->update_lock); - - data->valid = 0; - - /* shared crit hysteresis */ - i2c_smbus_write_byte_data(client, LM95245_REG_RW_COMMON_HYSTERESIS, - val); - - mutex_unlock(&data->update_lock); - - return count; + switch (attr) { + case hwmon_chip_update_interval: + *val = data->interval; + return 0; + default: + return -EOPNOTSUPP; + } } -static ssize_t show_type(struct device *dev, struct device_attribute *attr, - char *buf) +static int lm95245_write_chip(struct device *dev, u32 attr, int channel, + long val) { - struct i2c_client *client = to_i2c_client(dev); - struct lm95245_data *data = i2c_get_clientdata(client); + struct lm95245_data *data = dev_get_drvdata(dev); - return snprintf(buf, PAGE_SIZE - 1, - data->config2 & CFG2_REMOTE_TT ? "1\n" : "2\n"); + switch (attr) { + case hwmon_chip_update_interval: + return lm95245_set_conversion_rate(data, val); + default: + return -EOPNOTSUPP; + } } -static ssize_t set_type(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +static int lm95245_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) { - struct i2c_client *client = to_i2c_client(dev); - struct lm95245_data *data = i2c_get_clientdata(client); - unsigned long val; - - if (kstrtoul(buf, 10, &val) < 0) - return -EINVAL; - if (val != 1 && val != 2) - return -EINVAL; - - mutex_lock(&data->update_lock); - - if (val == 1) - data->config2 |= CFG2_REMOTE_TT; - else - data->config2 &= ~CFG2_REMOTE_TT; - - data->valid = 0; - - i2c_smbus_write_byte_data(client, LM95245_REG_RW_CONFIG2, - data->config2); - - mutex_unlock(&data->update_lock); - - return count; + switch (type) { + case hwmon_chip: + return lm95245_read_chip(dev, attr, channel, val); + case hwmon_temp: + return lm95245_read_temp(dev, attr, channel, val); + default: + return -EOPNOTSUPP; + } } -static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, - char *buf) +static int lm95245_write(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long val) { - struct lm95245_data *data = lm95245_update_device(dev); - int index = to_sensor_dev_attr(attr)->index; - - return snprintf(buf, PAGE_SIZE - 1, "%d\n", - !!(data->regs[9] & index)); + switch (type) { + case hwmon_chip: + return lm95245_write_chip(dev, attr, channel, val); + case hwmon_temp: + return lm95245_write_temp(dev, attr, channel, val); + default: + return -EOPNOTSUPP; + } } -static ssize_t show_interval(struct device *dev, struct device_attribute *attr, - char *buf) +static umode_t lm95245_temp_is_visible(const void *data, u32 attr, int channel) { - struct lm95245_data *data = lm95245_update_device(dev); - - return snprintf(buf, PAGE_SIZE - 1, "%lu\n", data->interval); + switch (attr) { + case hwmon_temp_input: + case hwmon_temp_max_alarm: + case hwmon_temp_max_hyst: + case hwmon_temp_crit_alarm: + case hwmon_temp_fault: + return 0444; + case hwmon_temp_type: + case hwmon_temp_max: + case hwmon_temp_crit: + case hwmon_temp_offset: + return 0644; + case hwmon_temp_crit_hyst: + return (channel == 0) ? 0644 : 0444; + default: + return 0; + } } -static ssize_t set_interval(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +static umode_t lm95245_is_visible(const void *data, + enum hwmon_sensor_types type, + u32 attr, int channel) { - struct i2c_client *client = to_i2c_client(dev); - struct lm95245_data *data = i2c_get_clientdata(client); - unsigned long val; - - if (kstrtoul(buf, 10, &val) < 0) - return -EINVAL; - - mutex_lock(&data->update_lock); - - data->interval = lm95245_set_conversion_rate(client, val); - - mutex_unlock(&data->update_lock); - - return count; + switch (type) { + case hwmon_chip: + switch (attr) { + case hwmon_chip_update_interval: + return 0644; + default: + return 0; + } + case hwmon_temp: + return lm95245_temp_is_visible(data, attr, channel); + default: + return 0; + } } -static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, 0); -static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_limit, - set_limit, 6); -static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_limit, - set_crit_hyst, 8); -static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, - STATUS1_LOC); - -static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, 2); -static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_limit, - set_limit, 7); -static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IWUSR | S_IRUGO, show_limit, - set_crit_hyst, 8); -static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, - STATUS1_RTCRIT); -static SENSOR_DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, - set_type, 0); -static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, - STATUS1_DIODE_FAULT); - -static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval, - set_interval); - -static struct attribute *lm95245_attributes[] = { - &sensor_dev_attr_temp1_input.dev_attr.attr, - &sensor_dev_attr_temp1_crit.dev_attr.attr, - &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, - &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, - &sensor_dev_attr_temp2_input.dev_attr.attr, - &sensor_dev_attr_temp2_crit.dev_attr.attr, - &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, - &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, - &sensor_dev_attr_temp2_type.dev_attr.attr, - &sensor_dev_attr_temp2_fault.dev_attr.attr, - &dev_attr_update_interval.attr, - NULL -}; - -static const struct attribute_group lm95245_group = { - .attrs = lm95245_attributes, -}; - /* Return 0 if detection is successful, -ENODEV otherwise */ static int lm95245_detect(struct i2c_client *new_client, struct i2c_board_info *info) { struct i2c_adapter *adapter = new_client->adapter; + int address = new_client->addr; + const char *name; + int rev, id; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -ENODEV; - if (i2c_smbus_read_byte_data(new_client, LM95245_REG_R_MAN_ID) - != MANUFACTURER_ID - || i2c_smbus_read_byte_data(new_client, LM95245_REG_R_CHIP_ID) - != DEFAULT_REVISION) + id = i2c_smbus_read_byte_data(new_client, LM95245_REG_R_MAN_ID); + if (id != MANUFACTURER_ID) return -ENODEV; - strlcpy(info->type, DEVNAME, I2C_NAME_SIZE); + rev = i2c_smbus_read_byte_data(new_client, LM95245_REG_R_CHIP_ID); + switch (rev) { + case LM95235_REVISION: + if (address != 0x18 && address != 0x29 && address != 0x4c) + return -ENODEV; + name = "lm95235"; + break; + case LM95245_REVISION: + name = "lm95245"; + break; + default: + return -ENODEV; + } + + strscpy(info->type, name, I2C_NAME_SIZE); return 0; } -static void lm95245_init_client(struct i2c_client *client) +static int lm95245_init_client(struct lm95245_data *data) { - struct lm95245_data *data = i2c_get_clientdata(client); + int ret; - data->valid = 0; - data->interval = lm95245_read_conversion_rate(client); + ret = lm95245_read_conversion_rate(data); + if (ret < 0) + return ret; - data->config1 = i2c_smbus_read_byte_data(client, - LM95245_REG_RW_CONFIG1); - data->config2 = i2c_smbus_read_byte_data(client, - LM95245_REG_RW_CONFIG2); + return regmap_update_bits(data->regmap, LM95245_REG_RW_CONFIG1, + CFG_STOP, 0); +} - if (data->config1 & CFG_STOP) { - /* Clear the standby bit */ - data->config1 &= ~CFG_STOP; - i2c_smbus_write_byte_data(client, LM95245_REG_RW_CONFIG1, - data->config1); +static bool lm95245_is_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case LM95245_REG_RW_CONFIG1: + case LM95245_REG_RW_CONVERS_RATE: + case LM95245_REG_W_ONE_SHOT: + case LM95245_REG_RW_CONFIG2: + case LM95245_REG_RW_REMOTE_OFFH: + case LM95245_REG_RW_REMOTE_OFFL: + case LM95245_REG_RW_REMOTE_OS_LIMIT: + case LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT: + case LM95245_REG_RW_REMOTE_TCRIT_LIMIT: + case LM95245_REG_RW_COMMON_HYSTERESIS: + return true; + default: + return false; } } -static int lm95245_probe(struct i2c_client *new_client, - const struct i2c_device_id *id) +static bool lm95245_is_volatile_reg(struct device *dev, unsigned int reg) { - struct lm95245_data *data; - int err; - - data = devm_kzalloc(&new_client->dev, sizeof(struct lm95245_data), - GFP_KERNEL); - if (!data) - return -ENOMEM; - - i2c_set_clientdata(new_client, data); - mutex_init(&data->update_lock); - - /* Initialize the LM95245 chip */ - lm95245_init_client(new_client); + switch (reg) { + case LM95245_REG_R_STATUS1: + case LM95245_REG_R_STATUS2: + case LM95245_REG_R_LOCAL_TEMPH_S: + case LM95245_REG_R_LOCAL_TEMPL_S: + case LM95245_REG_R_REMOTE_TEMPH_S: + case LM95245_REG_R_REMOTE_TEMPL_S: + case LM95245_REG_R_REMOTE_TEMPH_U: + case LM95245_REG_R_REMOTE_TEMPL_U: + return true; + default: + return false; + } +} - /* Register sysfs hooks */ - err = sysfs_create_group(&new_client->dev.kobj, &lm95245_group); - if (err) - return err; +static const struct regmap_config lm95245_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .writeable_reg = lm95245_is_writeable_reg, + .volatile_reg = lm95245_is_volatile_reg, + .cache_type = REGCACHE_MAPLE, + .use_single_read = true, + .use_single_write = true, +}; - data->hwmon_dev = hwmon_device_register(&new_client->dev); - if (IS_ERR(data->hwmon_dev)) { - err = PTR_ERR(data->hwmon_dev); - goto exit_remove_files; - } +static const struct hwmon_channel_info * const lm95245_info[] = { + HWMON_CHANNEL_INFO(chip, + HWMON_C_UPDATE_INTERVAL), + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_CRIT_HYST | + HWMON_T_CRIT_ALARM, + HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | + HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_FAULT | + HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | + HWMON_T_TYPE | HWMON_T_OFFSET), + NULL +}; - return 0; +static const struct hwmon_ops lm95245_hwmon_ops = { + .is_visible = lm95245_is_visible, + .read = lm95245_read, + .write = lm95245_write, +}; -exit_remove_files: - sysfs_remove_group(&new_client->dev.kobj, &lm95245_group); - return err; -} +static const struct hwmon_chip_info lm95245_chip_info = { + .ops = &lm95245_hwmon_ops, + .info = lm95245_info, +}; -static int lm95245_remove(struct i2c_client *client) +static int lm95245_probe(struct i2c_client *client) { - struct lm95245_data *data = i2c_get_clientdata(client); + struct device *dev = &client->dev; + struct lm95245_data *data; + struct device *hwmon_dev; + int ret; - hwmon_device_unregister(data->hwmon_dev); - sysfs_remove_group(&client->dev.kobj, &lm95245_group); + data = devm_kzalloc(dev, sizeof(struct lm95245_data), GFP_KERNEL); + if (!data) + return -ENOMEM; - return 0; + data->regmap = devm_regmap_init_i2c(client, &lm95245_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); + + /* Initialize the LM95245 chip */ + ret = lm95245_init_client(data); + if (ret < 0) + return ret; + + hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, + data, + &lm95245_chip_info, + NULL); + return PTR_ERR_OR_ZERO(hwmon_dev); } /* Driver data (common to all clients) */ static const struct i2c_device_id lm95245_id[] = { - { DEVNAME, 0 }, + { "lm95235" }, + { "lm95245" }, { } }; MODULE_DEVICE_TABLE(i2c, lm95245_id); +static const struct of_device_id __maybe_unused lm95245_of_match[] = { + { .compatible = "national,lm95235" }, + { .compatible = "national,lm95245" }, + { }, +}; +MODULE_DEVICE_TABLE(of, lm95245_of_match); + static struct i2c_driver lm95245_driver = { .class = I2C_CLASS_HWMON, .driver = { - .name = DEVNAME, + .name = "lm95245", + .of_match_table = of_match_ptr(lm95245_of_match), }, .probe = lm95245_probe, - .remove = lm95245_remove, .id_table = lm95245_id, .detect = lm95245_detect, .address_list = normal_i2c, @@ -523,5 +574,5 @@ static struct i2c_driver lm95245_driver = { module_i2c_driver(lm95245_driver); MODULE_AUTHOR("Alexander Stein <alexander.stein@systec-electronic.com>"); -MODULE_DESCRIPTION("LM95245 sensor driver"); +MODULE_DESCRIPTION("LM95235/LM95245 sensor driver"); MODULE_LICENSE("GPL"); |