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| author | Amitesh Singh <singh.amitesh@gmail.com> | 2024-02-03 19:25:24 +0300 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2024-03-07 11:48:06 +0300 |
| commit | 46f02b681ba2e39ea2bebd66aec45e38cf9b3687 (patch) | |
| tree | a56f5ae7a08aac8d20123943994554262a8e4d0a /drivers/leds | |
| parent | 9225333e480831cec3884977eaff05fcf0ea9700 (diff) | |
| download | linux-46f02b681ba2e39ea2bebd66aec45e38cf9b3687.tar.xz | |
leds: pca963x: Add support for suspend and resume
This implements power management for pca9633 which enables
device sleep and resume on system-wide sleep/hibernation
Signed-off-by: Amitesh Singh <singh.amitesh@gmail.com>
Link: https://lore.kernel.org/r/20240203162524.343936-1-singh.amitesh@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/leds-pca963x.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/leds/leds-pca963x.c b/drivers/leds/leds-pca963x.c index 47223c850e4b..b53905da3592 100644 --- a/drivers/leds/leds-pca963x.c +++ b/drivers/leds/leds-pca963x.c @@ -39,6 +39,7 @@ #define PCA963X_LED_PWM 0x2 /* Controlled through PWM */ #define PCA963X_LED_GRP_PWM 0x3 /* Controlled through PWM/GRPPWM */ +#define PCA963X_MODE1_SLEEP 0x04 /* Normal mode or Low Power mode, oscillator off */ #define PCA963X_MODE2_OUTDRV 0x04 /* Open-drain or totem pole */ #define PCA963X_MODE2_INVRT 0x10 /* Normal or inverted direction */ #define PCA963X_MODE2_DMBLNK 0x20 /* Enable blinking */ @@ -380,6 +381,32 @@ err: return ret; } +static int pca963x_suspend(struct device *dev) +{ + struct pca963x *chip = dev_get_drvdata(dev); + u8 reg; + + reg = i2c_smbus_read_byte_data(chip->client, PCA963X_MODE1); + reg = reg | BIT(PCA963X_MODE1_SLEEP); + i2c_smbus_write_byte_data(chip->client, PCA963X_MODE1, reg); + + return 0; +} + +static int pca963x_resume(struct device *dev) +{ + struct pca963x *chip = dev_get_drvdata(dev); + u8 reg; + + reg = i2c_smbus_read_byte_data(chip->client, PCA963X_MODE1); + reg = reg & ~BIT(PCA963X_MODE1_SLEEP); + i2c_smbus_write_byte_data(chip->client, PCA963X_MODE1, reg); + + return 0; +} + +static DEFINE_SIMPLE_DEV_PM_OPS(pca963x_pm, pca963x_suspend, pca963x_resume); + static const struct of_device_id of_pca963x_match[] = { { .compatible = "nxp,pca9632", }, { .compatible = "nxp,pca9633", }, @@ -430,6 +457,7 @@ static struct i2c_driver pca963x_driver = { .driver = { .name = "leds-pca963x", .of_match_table = of_pca963x_match, + .pm = pm_sleep_ptr(&pca963x_pm) }, .probe = pca963x_probe, .id_table = pca963x_id, |