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,
         },
 };