diff options
Diffstat (limited to 'drivers/mfd/adp5585.c')
| -rw-r--r-- | drivers/mfd/adp5585.c | 739 |
1 files changed, 689 insertions, 50 deletions
diff --git a/drivers/mfd/adp5585.c b/drivers/mfd/adp5585.c index 160e0b38106a..58f7cebe2ea4 100644 --- a/drivers/mfd/adp5585.c +++ b/drivers/mfd/adp5585.c @@ -4,22 +4,40 @@ * * Copyright 2022 NXP * Copyright 2024 Ideas on Board Oy + * Copyright 2025 Analog Devices Inc. */ #include <linux/array_size.h> +#include <linux/bitfield.h> #include <linux/device.h> #include <linux/err.h> #include <linux/i2c.h> +#include <linux/gpio/consumer.h> #include <linux/mfd/adp5585.h> #include <linux/mfd/core.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/regmap.h> +#include <linux/regulator/consumer.h> #include <linux/types.h> -static const struct mfd_cell adp5585_devs[] = { - { .name = "adp5585-gpio", }, - { .name = "adp5585-pwm", }, +enum { + ADP5585_DEV_GPIO, + ADP5585_DEV_PWM, + ADP5585_DEV_INPUT, + ADP5585_DEV_MAX +}; + +static const struct mfd_cell adp5585_devs[ADP5585_DEV_MAX] = { + MFD_CELL_NAME("adp5585-gpio"), + MFD_CELL_NAME("adp5585-pwm"), + MFD_CELL_NAME("adp5585-keys"), +}; + +static const struct mfd_cell adp5589_devs[] = { + MFD_CELL_NAME("adp5589-gpio"), + MFD_CELL_NAME("adp5589-pwm"), + MFD_CELL_NAME("adp5589-keys"), }; static const struct regmap_range adp5585_volatile_ranges[] = { @@ -31,6 +49,15 @@ static const struct regmap_access_table adp5585_volatile_regs = { .n_yes_ranges = ARRAY_SIZE(adp5585_volatile_ranges), }; +static const struct regmap_range adp5589_volatile_ranges[] = { + regmap_reg_range(ADP5585_ID, ADP5589_GPI_STATUS_C), +}; + +static const struct regmap_access_table adp5589_volatile_regs = { + .yes_ranges = adp5589_volatile_ranges, + .n_yes_ranges = ARRAY_SIZE(adp5589_volatile_ranges), +}; + /* * Chip variants differ in the default configuration of pull-up and pull-down * resistors, and therefore have different default register values: @@ -74,46 +101,597 @@ static const u8 adp5585_regmap_defaults_04[ADP5585_MAX_REG + 1] = { /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00, }; -enum adp5585_regmap_type { - ADP5585_REGMAP_00, - ADP5585_REGMAP_02, - ADP5585_REGMAP_04, +static const u8 adp5589_regmap_defaults_00[ADP5589_MAX_REG + 1] = { + /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x18 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x40 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x48 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; -static const struct regmap_config adp5585_regmap_configs[] = { - [ADP5585_REGMAP_00] = { - .reg_bits = 8, - .val_bits = 8, - .max_register = ADP5585_MAX_REG, - .volatile_table = &adp5585_volatile_regs, - .cache_type = REGCACHE_MAPLE, - .reg_defaults_raw = adp5585_regmap_defaults_00, - .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_00), - }, - [ADP5585_REGMAP_02] = { - .reg_bits = 8, - .val_bits = 8, - .max_register = ADP5585_MAX_REG, - .volatile_table = &adp5585_volatile_regs, - .cache_type = REGCACHE_MAPLE, - .reg_defaults_raw = adp5585_regmap_defaults_02, - .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_02), - }, - [ADP5585_REGMAP_04] = { - .reg_bits = 8, - .val_bits = 8, - .max_register = ADP5585_MAX_REG, - .volatile_table = &adp5585_volatile_regs, - .cache_type = REGCACHE_MAPLE, - .reg_defaults_raw = adp5585_regmap_defaults_04, - .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_04), - }, +static const u8 adp5589_regmap_defaults_01[ADP5589_MAX_REG + 1] = { + /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x18 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, + /* 0x40 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x48 */ 0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, }; +static const u8 adp5589_regmap_defaults_02[ADP5589_MAX_REG + 1] = { + /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x18 */ 0x00, 0x41, 0x01, 0x00, 0x11, 0x04, 0x00, 0x00, + /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x40 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + /* 0x48 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +}; + +static const u8 *adp5585_regmap_defaults[ADP5585_MAX] = { + [ADP5585_00] = adp5585_regmap_defaults_00, + [ADP5585_01] = adp5585_regmap_defaults_00, + [ADP5585_02] = adp5585_regmap_defaults_02, + [ADP5585_03] = adp5585_regmap_defaults_00, + [ADP5585_04] = adp5585_regmap_defaults_04, + [ADP5589_00] = adp5589_regmap_defaults_00, + [ADP5589_01] = adp5589_regmap_defaults_01, + [ADP5589_02] = adp5589_regmap_defaults_02, +}; + +static const struct regmap_config adp5585_regmap_config_template = { + .reg_bits = 8, + .val_bits = 8, + .max_register = ADP5585_MAX_REG, + .volatile_table = &adp5585_volatile_regs, + .cache_type = REGCACHE_MAPLE, + .num_reg_defaults_raw = ADP5585_MAX_REG + 1, +}; + +static const struct regmap_config adp5589_regmap_config_template = { + .reg_bits = 8, + .val_bits = 8, + .max_register = ADP5589_MAX_REG, + .volatile_table = &adp5589_volatile_regs, + .cache_type = REGCACHE_MAPLE, + .num_reg_defaults_raw = ADP5589_MAX_REG + 1, +}; + +static const struct adp5585_regs adp5585_regs = { + .ext_cfg = ADP5585_PIN_CONFIG_C, + .int_en = ADP5585_INT_EN, + .gen_cfg = ADP5585_GENERAL_CFG, + .poll_ptime_cfg = ADP5585_POLL_PTIME_CFG, + .reset_cfg = ADP5585_RESET_CFG, + .reset1_event_a = ADP5585_RESET1_EVENT_A, + .reset2_event_a = ADP5585_RESET2_EVENT_A, + .pin_cfg_a = ADP5585_PIN_CONFIG_A, +}; + +static const struct adp5585_regs adp5589_regs = { + .ext_cfg = ADP5589_PIN_CONFIG_D, + .int_en = ADP5589_INT_EN, + .gen_cfg = ADP5589_GENERAL_CFG, + .poll_ptime_cfg = ADP5589_POLL_PTIME_CFG, + .reset_cfg = ADP5589_RESET_CFG, + .reset1_event_a = ADP5589_RESET1_EVENT_A, + .reset2_event_a = ADP5589_RESET2_EVENT_A, + .pin_cfg_a = ADP5589_PIN_CONFIG_A, +}; + +static int adp5585_validate_event(const struct adp5585_dev *adp5585, unsigned int ev) +{ + if (adp5585->has_pin6) { + if (ev >= ADP5585_ROW5_KEY_EVENT_START && ev <= ADP5585_ROW5_KEY_EVENT_END) + return 0; + if (ev >= ADP5585_GPI_EVENT_START && ev <= ADP5585_GPI_EVENT_END) + return 0; + + return dev_err_probe(adp5585->dev, -EINVAL, + "Invalid unlock/reset event(%u) for this device\n", ev); + } + + if (ev >= ADP5585_KEY_EVENT_START && ev <= ADP5585_KEY_EVENT_END) + return 0; + if (ev >= ADP5585_GPI_EVENT_START && ev <= ADP5585_GPI_EVENT_END) { + /* + * Some variants of the adp5585 do not have the Row 5 + * (meaning pin 6 or GPIO 6) available. Instead that pin serves + * as a reset pin. So, we need to make sure no event is + * configured for it. + */ + if (ev == (ADP5585_GPI_EVENT_START + 5)) + return dev_err_probe(adp5585->dev, -EINVAL, + "Invalid unlock/reset event(%u). R5 not available\n", + ev); + return 0; + } + + return dev_err_probe(adp5585->dev, -EINVAL, + "Invalid unlock/reset event(%u) for this device\n", ev); +} + +static int adp5589_validate_event(const struct adp5585_dev *adp5585, unsigned int ev) +{ + if (ev >= ADP5589_KEY_EVENT_START && ev <= ADP5589_KEY_EVENT_END) + return 0; + if (ev >= ADP5589_GPI_EVENT_START && ev <= ADP5589_GPI_EVENT_END) + return 0; + + return dev_err_probe(adp5585->dev, -EINVAL, + "Invalid unlock/reset event(%u) for this device\n", ev); +} + +static struct regmap_config *adp5585_fill_variant_config(struct adp5585_dev *adp5585) +{ + struct regmap_config *regmap_config; + + switch (adp5585->variant) { + case ADP5585_00: + case ADP5585_01: + case ADP5585_02: + case ADP5585_03: + case ADP5585_04: + adp5585->id = ADP5585_MAN_ID_VALUE; + adp5585->regs = &adp5585_regs; + adp5585->n_pins = ADP5585_PIN_MAX; + adp5585->reset2_out = ADP5585_RESET2_OUT; + if (adp5585->variant == ADP5585_01) + adp5585->has_pin6 = true; + regmap_config = devm_kmemdup(adp5585->dev, &adp5585_regmap_config_template, + sizeof(*regmap_config), GFP_KERNEL); + break; + case ADP5589_00: + case ADP5589_01: + case ADP5589_02: + adp5585->id = ADP5589_MAN_ID_VALUE; + adp5585->regs = &adp5589_regs; + adp5585->has_unlock = true; + adp5585->has_pin6 = true; + adp5585->n_pins = ADP5589_PIN_MAX; + adp5585->reset2_out = ADP5589_RESET2_OUT; + regmap_config = devm_kmemdup(adp5585->dev, &adp5589_regmap_config_template, + sizeof(*regmap_config), GFP_KERNEL); + break; + default: + return ERR_PTR(-ENODEV); + } + + if (!regmap_config) + return ERR_PTR(-ENOMEM); + + regmap_config->reg_defaults_raw = adp5585_regmap_defaults[adp5585->variant]; + + return regmap_config; +} + +static int adp5585_parse_ev_array(const struct adp5585_dev *adp5585, const char *prop, u32 *events, + u32 *n_events, u32 max_evs, bool reset_ev) +{ + struct device *dev = adp5585->dev; + unsigned int ev; + int ret; + + /* + * The device has the capability of handling special events through GPIs or a Keypad: + * unlock events: Unlock the keymap until one of the configured events is detected. + * reset events: Generate a reset pulse when one of the configured events is detected. + */ + ret = device_property_count_u32(dev, prop); + if (ret < 0) + return 0; + + *n_events = ret; + + if (!adp5585->has_unlock && !reset_ev) + return dev_err_probe(dev, -EOPNOTSUPP, "Unlock keys not supported\n"); + + if (*n_events > max_evs) + return dev_err_probe(dev, -EINVAL, + "Invalid number of keys(%u > %u) for %s\n", + *n_events, max_evs, prop); + + ret = device_property_read_u32_array(dev, prop, events, *n_events); + if (ret) + return ret; + + for (ev = 0; ev < *n_events; ev++) { + if (!reset_ev && events[ev] == ADP5589_UNLOCK_WILDCARD) + continue; + + if (adp5585->id == ADP5585_MAN_ID_VALUE) + ret = adp5585_validate_event(adp5585, events[ev]); + else + ret = adp5589_validate_event(adp5585, events[ev]); + if (ret) + return ret; + } + + return 0; +} + +static int adp5585_unlock_ev_parse(struct adp5585_dev *adp5585) +{ + struct device *dev = adp5585->dev; + int ret; + + ret = adp5585_parse_ev_array(adp5585, "adi,unlock-events", adp5585->unlock_keys, + &adp5585->nkeys_unlock, ARRAY_SIZE(adp5585->unlock_keys), + false); + if (ret) + return ret; + if (!adp5585->nkeys_unlock) + return 0; + + ret = device_property_read_u32(dev, "adi,unlock-trigger-sec", &adp5585->unlock_time); + if (!ret) { + if (adp5585->unlock_time > ADP5585_MAX_UNLOCK_TIME_SEC) + return dev_err_probe(dev, -EINVAL, + "Invalid unlock time(%u > %d)\n", + adp5585->unlock_time, + ADP5585_MAX_UNLOCK_TIME_SEC); + } + + return 0; +} + +static int adp5585_reset_ev_parse(struct adp5585_dev *adp5585) +{ + struct device *dev = adp5585->dev; + u32 prop_val; + int ret; + + ret = adp5585_parse_ev_array(adp5585, "adi,reset1-events", adp5585->reset1_keys, + &adp5585->nkeys_reset1, + ARRAY_SIZE(adp5585->reset1_keys), true); + if (ret) + return ret; + + ret = adp5585_parse_ev_array(adp5585, "adi,reset2-events", + adp5585->reset2_keys, + &adp5585->nkeys_reset2, + ARRAY_SIZE(adp5585->reset2_keys), true); + if (ret) + return ret; + + if (!adp5585->nkeys_reset1 && !adp5585->nkeys_reset2) + return 0; + + if (adp5585->nkeys_reset1 && device_property_read_bool(dev, "adi,reset1-active-high")) + adp5585->reset_cfg |= FIELD_PREP(ADP5585_RESET1_POL, 1); + + if (adp5585->nkeys_reset2 && device_property_read_bool(dev, "adi,reset2-active-high")) + adp5585->reset_cfg |= FIELD_PREP(ADP5585_RESET2_POL, 1); + + if (device_property_read_bool(dev, "adi,rst-passthrough-enable")) + adp5585->reset_cfg |= FIELD_PREP(ADP5585_RST_PASSTHRU_EN, 1); + + ret = device_property_read_u32(dev, "adi,reset-trigger-ms", &prop_val); + if (!ret) { + switch (prop_val) { + case 0: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_RESET_TRIG_TIME, 0); + break; + case 1000: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_RESET_TRIG_TIME, 1); + break; + case 1500: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_RESET_TRIG_TIME, 2); + break; + case 2000: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_RESET_TRIG_TIME, 3); + break; + case 2500: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_RESET_TRIG_TIME, 4); + break; + case 3000: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_RESET_TRIG_TIME, 5); + break; + case 3500: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_RESET_TRIG_TIME, 6); + break; + case 4000: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_RESET_TRIG_TIME, 7); + break; + default: + return dev_err_probe(dev, -EINVAL, + "Invalid value(%u) for adi,reset-trigger-ms\n", + prop_val); + } + } + + ret = device_property_read_u32(dev, "adi,reset-pulse-width-us", &prop_val); + if (!ret) { + switch (prop_val) { + case 500: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_PULSE_WIDTH, 0); + break; + case 1000: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_PULSE_WIDTH, 1); + break; + case 2000: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_PULSE_WIDTH, 2); + break; + case 10000: + adp5585->reset_cfg |= FIELD_PREP(ADP5585_PULSE_WIDTH, 3); + break; + default: + return dev_err_probe(dev, -EINVAL, + "Invalid value(%u) for adi,reset-pulse-width-us\n", + prop_val); + } + return ret; + } + + return 0; +} + +static int adp5585_add_devices(const struct adp5585_dev *adp5585) +{ + struct device *dev = adp5585->dev; + const struct mfd_cell *cells; + int ret; + + if (adp5585->id == ADP5585_MAN_ID_VALUE) + cells = adp5585_devs; + else + cells = adp5589_devs; + + if (device_property_present(dev, "#pwm-cells")) { + /* Make sure the PWM output pin is not used by the GPIO or INPUT devices */ + __set_bit(ADP5585_PWM_OUT, adp5585->pin_usage); + ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, + &cells[ADP5585_DEV_PWM], 1, NULL, 0, NULL); + if (ret) + return dev_err_probe(dev, ret, "Failed to add PWM device\n"); + } + + if (device_property_present(dev, "#gpio-cells")) { + ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, + &cells[ADP5585_DEV_GPIO], 1, NULL, 0, NULL); + if (ret) + return dev_err_probe(dev, ret, "Failed to add GPIO device\n"); + } + + if (device_property_present(adp5585->dev, "adi,keypad-pins")) { + ret = devm_mfd_add_devices(adp5585->dev, PLATFORM_DEVID_AUTO, + &cells[ADP5585_DEV_INPUT], 1, NULL, 0, NULL); + if (ret) + return dev_err_probe(dev, ret, "Failed to add input device\n"); + } + + return 0; +} + +static void adp5585_osc_disable(void *data) +{ + const struct adp5585_dev *adp5585 = data; + + regmap_write(adp5585->regmap, ADP5585_GENERAL_CFG, 0); +} + +static void adp5585_report_events(struct adp5585_dev *adp5585, int ev_cnt) +{ + unsigned int i; + + for (i = 0; i < ev_cnt; i++) { + unsigned long key_val, key_press; + unsigned int key; + int ret; + + ret = regmap_read(adp5585->regmap, ADP5585_FIFO_1 + i, &key); + if (ret) + return; + + key_val = FIELD_GET(ADP5585_KEY_EVENT_MASK, key); + key_press = FIELD_GET(ADP5585_KEV_EV_PRESS_MASK, key); + + blocking_notifier_call_chain(&adp5585->event_notifier, key_val, (void *)key_press); + } +} + +static irqreturn_t adp5585_irq(int irq, void *data) +{ + struct adp5585_dev *adp5585 = data; + unsigned int status, ev_cnt; + int ret; + + ret = regmap_read(adp5585->regmap, ADP5585_INT_STATUS, &status); + if (ret) + return IRQ_HANDLED; + + if (status & ADP5585_OVRFLOW_INT) + dev_err_ratelimited(adp5585->dev, "Event overflow error\n"); + + if (!(status & ADP5585_EVENT_INT)) + goto out_irq; + + ret = regmap_read(adp5585->regmap, ADP5585_STATUS, &ev_cnt); + if (ret) + goto out_irq; + + ev_cnt = FIELD_GET(ADP5585_EC_MASK, ev_cnt); + if (!ev_cnt) + goto out_irq; + + adp5585_report_events(adp5585, ev_cnt); +out_irq: + regmap_write(adp5585->regmap, ADP5585_INT_STATUS, status); + return IRQ_HANDLED; +} + +static int adp5585_setup(struct adp5585_dev *adp5585) +{ + const struct adp5585_regs *regs = adp5585->regs; + unsigned int reg_val = 0, i; + int ret; + + /* If pin_6 (ROW5/GPI6) is not available, make sure to mark it as "busy" */ + if (!adp5585->has_pin6) + __set_bit(ADP5585_ROW5, adp5585->pin_usage); + + /* Configure the device with reset and unlock events */ + for (i = 0; i < adp5585->nkeys_unlock; i++) { + ret = regmap_write(adp5585->regmap, ADP5589_UNLOCK1 + i, + adp5585->unlock_keys[i] | ADP5589_UNLOCK_EV_PRESS); + if (ret) + return ret; + } + + if (adp5585->nkeys_unlock) { + ret = regmap_update_bits(adp5585->regmap, ADP5589_UNLOCK_TIMERS, + ADP5589_UNLOCK_TIMER, adp5585->unlock_time); + if (ret) + return ret; + + ret = regmap_set_bits(adp5585->regmap, ADP5589_LOCK_CFG, ADP5589_LOCK_EN); + if (ret) + return ret; + } + + for (i = 0; i < adp5585->nkeys_reset1; i++) { + ret = regmap_write(adp5585->regmap, regs->reset1_event_a + i, + adp5585->reset1_keys[i] | ADP5585_RESET_EV_PRESS); + if (ret) + return ret; + + /* Mark that pin as not usable for the INPUT and GPIO devices. */ + __set_bit(ADP5585_RESET1_OUT, adp5585->pin_usage); + } + + for (i = 0; i < adp5585->nkeys_reset2; i++) { + ret = regmap_write(adp5585->regmap, regs->reset2_event_a + i, + adp5585->reset2_keys[i] | ADP5585_RESET_EV_PRESS); + if (ret) + return ret; + + __set_bit(adp5585->reset2_out, adp5585->pin_usage); + } + + if (adp5585->nkeys_reset1 || adp5585->nkeys_reset2) { + ret = regmap_write(adp5585->regmap, regs->reset_cfg, adp5585->reset_cfg); + if (ret) + return ret; + + /* If there's a reset1 event, then R4 is used as an output for the reset signal */ + if (adp5585->nkeys_reset1) + reg_val = ADP5585_R4_EXTEND_CFG_RESET1; + /* If there's a reset2 event, then C4 is used as an output for the reset signal */ + if (adp5585->nkeys_reset2) + reg_val |= ADP5585_C4_EXTEND_CFG_RESET2; + + ret = regmap_update_bits(adp5585->regmap, regs->ext_cfg, + ADP5585_C4_EXTEND_CFG_MASK | ADP5585_R4_EXTEND_CFG_MASK, + reg_val); + if (ret) + return ret; + } + + /* Clear any possible event by reading all the FIFO entries */ + for (i = 0; i < ADP5585_EV_MAX; i++) { + ret = regmap_read(adp5585->regmap, ADP5585_FIFO_1 + i, ®_val); + if (ret) + return ret; + } + + ret = regmap_write(adp5585->regmap, regs->poll_ptime_cfg, adp5585->ev_poll_time); + if (ret) + return ret; + + /* + * Enable the internal oscillator, as it's shared between multiple + * functions. + */ + ret = regmap_write(adp5585->regmap, regs->gen_cfg, + ADP5585_OSC_FREQ_500KHZ | ADP5585_INT_CFG | ADP5585_OSC_EN); + if (ret) + return ret; + + return devm_add_action_or_reset(adp5585->dev, adp5585_osc_disable, adp5585); +} + +static int adp5585_parse_fw(struct adp5585_dev *adp5585) +{ + unsigned int prop_val; + int ret; + + ret = device_property_read_u32(adp5585->dev, "poll-interval", &prop_val); + if (!ret) { + adp5585->ev_poll_time = prop_val / 10 - 1; + /* + * ev_poll_time is the raw value to be written on the register and 0 to 3 are the + * valid values. + */ + if (adp5585->ev_poll_time > 3) + return dev_err_probe(adp5585->dev, -EINVAL, + "Invalid value(%u) for poll-interval\n", prop_val); + } + + ret = adp5585_unlock_ev_parse(adp5585); + if (ret) + return ret; + + return adp5585_reset_ev_parse(adp5585); +} + +static void adp5585_irq_disable(void *data) +{ + struct adp5585_dev *adp5585 = data; + + regmap_write(adp5585->regmap, adp5585->regs->int_en, 0); +} + +static int adp5585_irq_enable(struct i2c_client *i2c, + struct adp5585_dev *adp5585) +{ + const struct adp5585_regs *regs = adp5585->regs; + unsigned int stat; + int ret; + + if (i2c->irq <= 0) + return 0; + + ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, adp5585_irq, + IRQF_ONESHOT, i2c->name, adp5585); + if (ret) + return ret; + + /* + * Clear any possible outstanding interrupt before enabling them. We do that by reading + * the status register and writing back the same value. + */ + ret = regmap_read(adp5585->regmap, ADP5585_INT_STATUS, &stat); + if (ret) + return ret; + + ret = regmap_write(adp5585->regmap, ADP5585_INT_STATUS, stat); + if (ret) + return ret; + + ret = regmap_write(adp5585->regmap, regs->int_en, ADP5585_OVRFLOW_IEN | ADP5585_EVENT_IEN); + if (ret) + return ret; + + return devm_add_action_or_reset(&i2c->dev, adp5585_irq_disable, adp5585); +} + static int adp5585_i2c_probe(struct i2c_client *i2c) { - const struct regmap_config *regmap_config; + struct regmap_config *regmap_config; struct adp5585_dev *adp5585; + struct gpio_desc *gpio; unsigned int id; int ret; @@ -122,8 +700,36 @@ static int adp5585_i2c_probe(struct i2c_client *i2c) return -ENOMEM; i2c_set_clientdata(i2c, adp5585); + adp5585->dev = &i2c->dev; + adp5585->irq = i2c->irq; + BLOCKING_INIT_NOTIFIER_HEAD(&adp5585->event_notifier); + + adp5585->variant = (enum adp5585_variant)(uintptr_t)i2c_get_match_data(i2c); + if (!adp5585->variant) + return -ENODEV; + + regmap_config = adp5585_fill_variant_config(adp5585); + if (IS_ERR(regmap_config)) + return PTR_ERR(regmap_config); + + ret = devm_regulator_get_enable(&i2c->dev, "vdd"); + if (ret) + return ret; + + gpio = devm_gpiod_get_optional(&i2c->dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(gpio)) + return PTR_ERR(gpio); + + /* + * Note the timings are not documented anywhere in the datasheet. They are just + * reasonable values that work. + */ + if (gpio) { + fsleep(30); + gpiod_set_value_cansleep(gpio, 0); + fsleep(60); + } - regmap_config = i2c_get_match_data(i2c); adp5585->regmap = devm_regmap_init_i2c(i2c, regmap_config); if (IS_ERR(adp5585->regmap)) return dev_err_probe(&i2c->dev, PTR_ERR(adp5585->regmap), @@ -134,24 +740,37 @@ static int adp5585_i2c_probe(struct i2c_client *i2c) return dev_err_probe(&i2c->dev, ret, "Failed to read device ID\n"); - if ((id & ADP5585_MAN_ID_MASK) != ADP5585_MAN_ID_VALUE) + id &= ADP5585_MAN_ID_MASK; + if (id != adp5585->id) return dev_err_probe(&i2c->dev, -ENODEV, "Invalid device ID 0x%02x\n", id); - ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, - adp5585_devs, ARRAY_SIZE(adp5585_devs), - NULL, 0, NULL); + adp5585->pin_usage = devm_bitmap_zalloc(&i2c->dev, adp5585->n_pins, GFP_KERNEL); + if (!adp5585->pin_usage) + return -ENOMEM; + + ret = adp5585_parse_fw(adp5585); if (ret) - return dev_err_probe(&i2c->dev, ret, - "Failed to add child devices\n"); + return ret; - return 0; + ret = adp5585_setup(adp5585); + if (ret) + return ret; + + ret = adp5585_add_devices(adp5585); + if (ret) + return ret; + + return adp5585_irq_enable(i2c, adp5585); } static int adp5585_suspend(struct device *dev) { struct adp5585_dev *adp5585 = dev_get_drvdata(dev); + if (adp5585->irq) + disable_irq(adp5585->irq); + regcache_cache_only(adp5585->regmap, true); return 0; @@ -160,11 +779,19 @@ static int adp5585_suspend(struct device *dev) static int adp5585_resume(struct device *dev) { struct adp5585_dev *adp5585 = dev_get_drvdata(dev); + int ret; regcache_cache_only(adp5585->regmap, false); regcache_mark_dirty(adp5585->regmap); - return regcache_sync(adp5585->regmap); + ret = regcache_sync(adp5585->regmap); + if (ret) + return ret; + + if (adp5585->irq) + enable_irq(adp5585->irq); + + return 0; } static DEFINE_SIMPLE_DEV_PM_OPS(adp5585_pm, adp5585_suspend, adp5585_resume); @@ -172,19 +799,31 @@ static DEFINE_SIMPLE_DEV_PM_OPS(adp5585_pm, adp5585_suspend, adp5585_resume); static const struct of_device_id adp5585_of_match[] = { { .compatible = "adi,adp5585-00", - .data = &adp5585_regmap_configs[ADP5585_REGMAP_00], + .data = (void *)ADP5585_00, }, { .compatible = "adi,adp5585-01", - .data = &adp5585_regmap_configs[ADP5585_REGMAP_00], + .data = (void *)ADP5585_01, }, { .compatible = "adi,adp5585-02", - .data = &adp5585_regmap_configs[ADP5585_REGMAP_02], + .data = (void *)ADP5585_02, }, { .compatible = "adi,adp5585-03", - .data = &adp5585_regmap_configs[ADP5585_REGMAP_00], + .data = (void *)ADP5585_03, }, { .compatible = "adi,adp5585-04", - .data = &adp5585_regmap_configs[ADP5585_REGMAP_04], + .data = (void *)ADP5585_04, + }, { + .compatible = "adi,adp5589-00", + .data = (void *)ADP5589_00, + }, { + .compatible = "adi,adp5589-01", + .data = (void *)ADP5589_01, + }, { + .compatible = "adi,adp5589-02", + .data = (void *)ADP5589_02, + }, { + .compatible = "adi,adp5589", + .data = (void *)ADP5589_00, }, { /* sentinel */ } }; |