diff mbox series

[v3] leds: pca963x: Add power management support

Message ID 20240203162524.343936-1-singh.amitesh@gmail.com
State New
Headers show
Series [v3] leds: pca963x: Add power management support | expand

Commit Message

Amitesh Singh Feb. 3, 2024, 4:25 p.m. UTC 
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>
---
 drivers/leds/leds-pca963x.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

Comments

Lee Jones Feb. 8, 2024, 11:35 a.m. UTC | #1 
On Sat, 03 Feb 2024 21:55:24 +0530, Amitesh Singh wrote:
> This implements power management for pca9633 which enables
> device sleep and resume on system-wide sleep/hibernation
> 
> 

Applied, thanks!

[1/1] leds: pca963x: Add power management support
      commit: e684dcca3659a3f88945a2a5c6fe5a156d4b0178

--
Lee Jones [李琼斯]
Amitesh Singh Feb. 10, 2024, 4:33 p.m. UTC | #2 
On Thu, Feb 8, 2024 at 5:05 PM Lee Jones <lee@kernel.org> wrote:
>
> On Sat, 03 Feb 2024 21:55:24 +0530, Amitesh Singh wrote:
> > This implements power management for pca9633 which enables
> > device sleep and resume on system-wide sleep/hibernation
> >
> >
>
> Applied, thanks!
>

Thanks for reviewing.

> [1/1] leds: pca963x: Add power management support
>       commit: e684dcca3659a3f88945a2a5c6fe5a156d4b0178
>
> --
> Lee Jones [李琼斯]
>
diff mbox series

Patch

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 @@  static int pca963x_register_leds(struct i2c_client *client,
 	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,