Commit 46f02b68 authored by Amitesh Singh's avatar Amitesh Singh Committed by Lee Jones
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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: default avatarAmitesh Singh <singh.amitesh@gmail.com>
Link: https://lore.kernel.org/r/20240203162524.343936-1-singh.amitesh@gmail.com


Signed-off-by: default avatarLee Jones <lee@kernel.org>
parent 9225333e

drivers/leds/leds-pca963x.c

+28 −0
Original line number Diff line number Diff line
@@ -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,