diff options
Diffstat (limited to 'drivers/mfd/sec-core.c')
| -rw-r--r-- | drivers/mfd/sec-core.c | 62 |
1 files changed, 52 insertions, 10 deletions
diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c index 54cc25546592..e4671088f075 100644 --- a/drivers/mfd/sec-core.c +++ b/drivers/mfd/sec-core.c @@ -31,7 +31,7 @@ #include <linux/mfd/samsung/s5m8767.h> #include <linux/regmap.h> -static struct mfd_cell s5m8751_devs[] = { +static const struct mfd_cell s5m8751_devs[] = { { .name = "s5m8751-pmic", }, { @@ -41,7 +41,7 @@ static struct mfd_cell s5m8751_devs[] = { }, }; -static struct mfd_cell s5m8763_devs[] = { +static const struct mfd_cell s5m8763_devs[] = { { .name = "s5m8763-pmic", }, { @@ -51,15 +51,17 @@ static struct mfd_cell s5m8763_devs[] = { }, }; -static struct mfd_cell s5m8767_devs[] = { +static const struct mfd_cell s5m8767_devs[] = { { .name = "s5m8767-pmic", }, { .name = "s5m-rtc", - }, + }, { + .name = "s5m8767-clk", + } }; -static struct mfd_cell s2mps11_devs[] = { +static const struct mfd_cell s2mps11_devs[] = { { .name = "s2mps11-pmic", }, { @@ -134,12 +136,12 @@ static bool s5m8763_volatile(struct device *dev, unsigned int reg) } } -static struct regmap_config sec_regmap_config = { +static const struct regmap_config sec_regmap_config = { .reg_bits = 8, .val_bits = 8, }; -static struct regmap_config s2mps11_regmap_config = { +static const struct regmap_config s2mps11_regmap_config = { .reg_bits = 8, .val_bits = 8, @@ -148,7 +150,7 @@ static struct regmap_config s2mps11_regmap_config = { .cache_type = REGCACHE_FLAT, }; -static struct regmap_config s5m8763_regmap_config = { +static const struct regmap_config s5m8763_regmap_config = { .reg_bits = 8, .val_bits = 8, @@ -157,7 +159,7 @@ static struct regmap_config s5m8763_regmap_config = { .cache_type = REGCACHE_FLAT, }; -static struct regmap_config s5m8767_regmap_config = { +static const struct regmap_config s5m8767_regmap_config = { .reg_bits = 8, .val_bits = 8, @@ -204,7 +206,7 @@ static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata( struct device *dev) { - return 0; + return NULL; } #endif @@ -323,6 +325,8 @@ static int sec_pmic_probe(struct i2c_client *i2c, if (ret) goto err; + device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup); + return ret; err: @@ -341,6 +345,43 @@ static int sec_pmic_remove(struct i2c_client *i2c) return 0; } +static int sec_pmic_suspend(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) { + enable_irq_wake(sec_pmic->irq); + /* + * PMIC IRQ must be disabled during suspend for RTC alarm + * to work properly. + * When device is woken up from suspend by RTC Alarm, an + * interrupt occurs before resuming I2C bus controller. + * The interrupt is handled by regmap_irq_thread which tries + * to read RTC registers. This read fails (I2C is still + * suspended) and RTC Alarm interrupt is disabled. + */ + disable_irq(sec_pmic->irq); + } + + return 0; +} + +static int sec_pmic_resume(struct device *dev) +{ + struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); + struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); + + if (device_may_wakeup(dev)) { + disable_irq_wake(sec_pmic->irq); + enable_irq(sec_pmic->irq); + } + + return 0; +} + +static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume); + static const struct i2c_device_id sec_pmic_id[] = { { "sec_pmic", 0 }, { } @@ -351,6 +392,7 @@ static struct i2c_driver sec_pmic_driver = { .driver = { .name = "sec_pmic", .owner = THIS_MODULE, + .pm = &sec_pmic_pm_ops, .of_match_table = of_match_ptr(sec_dt_match), }, .probe = sec_pmic_probe, |