[PATCH] leds: leds-pca963x: add nxp,leds-suspend property

[Matt Ranostay <mranostay@gmail.com>]

Allow the LED subsystem to blank the LEDS on suspend.

Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Matt Ranostay <matt@ranostay.consulting>
---
 Documentation/devicetree/bindings/leds/pca963x.txt | 1 +
 drivers/leds/leds-pca963x.c                        | 9 +++++++++
 include/linux/platform_data/leds-pca963x.h         | 6 ++++++
 3 files changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/leds/pca963x.txt b/Documentation/devicetree/bindings/leds/pca963x.txt
index dafbe9931c2b..61b1f037ebd0 100644
--- a/Documentation/devicetree/bindings/leds/pca963x.txt
+++ b/Documentation/devicetree/bindings/leds/pca963x.txt
@@ -7,6 +7,7 @@ Optional properties:
 - nxp,totem-pole : use totem pole (push-pull) instead of open-drain (pca9632 defaults
   to open-drain, newer chips to totem pole)
 - nxp,hw-blink : use hardware blinking instead of software blinking
+- nxp,leds-suspend : turn off LEDS on system suspend
 
 Each led is represented as a sub-node of the nxp,pca963x device.
 
diff --git a/drivers/leds/leds-pca963x.c b/drivers/leds/leds-pca963x.c
index 407eba11e187..9a347b94f1db 100644
--- a/drivers/leds/leds-pca963x.c
+++ b/drivers/leds/leds-pca963x.c
@@ -294,6 +294,12 @@ pca963x_dt_init(struct i2c_client *client, struct pca963x_chipdef *chip)
 	else
 		pdata->blink_type = PCA963X_SW_BLINK;
 
+	/* default to turning off LEDs on suspend */
+	if (of_property_read_bool(np, "nxp,leds-suspend"))
+		pdata->suspend = PCA963X_LED_SUSPEND;
+	else
+		pdata->suspend = PCA963X_LED_RETAIN;
+
 	return pdata;
 }
 
@@ -386,6 +392,9 @@ static int pca963x_probe(struct i2c_client *client,
 		if (pdata && pdata->blink_type == PCA963X_HW_BLINK)
 			pca963x[i].led_cdev.blink_set = pca963x_blink_set;
 
+		if (pdata && pdata->suspend == PCA963X_LED_SUSPEND)
+			pca963x[i].led_cdev.flags = LED_CORE_SUSPENDRESUME;
+
 		err = led_classdev_register(&client->dev, &pca963x[i].led_cdev);
 		if (err < 0)
 			goto exit;
diff --git a/include/linux/platform_data/leds-pca963x.h b/include/linux/platform_data/leds-pca963x.h
index e731f0036329..e5bad91e2fab 100644
--- a/include/linux/platform_data/leds-pca963x.h
+++ b/include/linux/platform_data/leds-pca963x.h
@@ -33,10 +33,16 @@ enum pca963x_blink_type {
 	PCA963X_HW_BLINK,
 };
 
+enum pca963x_suspend {
+	PCA963X_LED_RETAIN,
+	PCA963X_LED_SUSPEND,
+};
+
 struct pca963x_platform_data {
 	struct led_platform_data leds;
 	enum pca963x_outdrv outdrv;
 	enum pca963x_blink_type blink_type;
+	enum pca963x_suspend suspend;
 };
 
 #endif /* __LINUX_PCA963X_H*/
-- 
2.7.4