mfd: Add asic3 based LED suspend/resume handlers

Added led suspend/resume handlers to the leds/leds-asic3 and mfd/asic3 drivers.
On suspend the leds will be turned off and their clocks disabled. On resume the
reverse.

Signed-off-by: Paul Parsons <lost.distance@yahoo.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 34 insertions, 1 deletions

diff --git a/drivers/leds/leds-asic3.c b/drivers/leds/leds-asic3.c
index 22f847c890c9..fbd5d88ccd8f 100644
--- a/drivers/leds/leds-asic3.c
+++ b/drivers/leds/leds-asic3.c
@@ -107,9 +107,10 @@ static int __devinit asic3_led_probe(struct platform_device *pdev)
 	}
 
 	led->cdev->name = led->name;
-	led->cdev->default_trigger = led->default_trigger;
+	led->cdev->flags = LED_CORE_SUSPENDRESUME;
 	led->cdev->brightness_set = brightness_set;
 	led->cdev->blink_set = blink_set;
+	led->cdev->default_trigger = led->default_trigger;
 
 	ret = led_classdev_register(&pdev->dev, led->cdev);
 	if (ret < 0)
@@ -136,12 +137,44 @@ static int __devexit asic3_led_remove(struct platform_device *pdev)
 	return mfd_cell_disable(pdev);
 }
 
+static int asic3_led_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	const struct mfd_cell *cell = mfd_get_cell(pdev);
+	int ret;
+
+	ret = 0;
+	if (cell->suspend)
+		ret = (*cell->suspend)(pdev);
+
+	return ret;
+}
+
+static int asic3_led_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	const struct mfd_cell *cell = mfd_get_cell(pdev);
+	int ret;
+
+	ret = 0;
+	if (cell->resume)
+		ret = (*cell->resume)(pdev);
+
+	return ret;
+}
+
+static const struct dev_pm_ops asic3_led_pm_ops = {
+	.suspend	= asic3_led_suspend,
+	.resume		= asic3_led_resume,
+};
+
 static struct platform_driver asic3_led_driver = {
 	.probe		= asic3_led_probe,
 	.remove		= __devexit_p(asic3_led_remove),
 	.driver		= {
 		.name	= "leds-asic3",
 		.owner	= THIS_MODULE,
+		.pm	= &asic3_led_pm_ops,
 	},
 };