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authorAmitesh Singh <singh.amitesh@gmail.com>2024-02-03 19:25:24 +0300
committerLee Jones <lee@kernel.org>2024-03-07 11:48:06 +0300
commit46f02b681ba2e39ea2bebd66aec45e38cf9b3687 (patch)
treea56f5ae7a08aac8d20123943994554262a8e4d0a /drivers/leds
parent9225333e480831cec3884977eaff05fcf0ea9700 (diff)
downloadlinux-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.c28
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,