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Date: Tue, 09 Aug 2011 16:27:33 +0000
From: "Paul Parsons" <lost.distance@...oo.com>
To: <linux-kernel@...r.kernel.org>
Cc: <philipp.zabel@...il.com>, <sameo@...ux.intel.com>,
<mad_soft@...ox.ru>, <koen@...inion.thruhere.net>
Subject: [PATCH] mfd: asic3: Add 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@...oo.com>
---
diff -uprN clean-3.0.1/drivers/leds/leds-asic3.c linux-3.0.1/drivers/leds/leds-asic3.c
--- clean-3.0.1/drivers/leds/leds-asic3.c 2011-08-05 05:59:21.000000000 +0100
+++ linux-3.0.1/drivers/leds/leds-asic3.c 2011-08-08 10:46:03.164860492 +0100
@@ -107,9 +107,10 @@ static int __devinit asic3_led_probe(str
}
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(st
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,
},
};
diff -uprN clean-3.0.1/drivers/mfd/asic3.c linux-3.0.1/drivers/mfd/asic3.c
--- clean-3.0.1/drivers/mfd/asic3.c 2011-08-05 05:59:21.000000000 +0100
+++ linux-3.0.1/drivers/mfd/asic3.c 2011-08-08 10:46:03.164860492 +0100
@@ -811,24 +813,43 @@ static int asic3_leds_disable(struct pla
return 0;
}
+static int asic3_leds_suspend(struct platform_device *pdev)
+{
+ const struct mfd_cell *cell = mfd_get_cell(pdev);
+ struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+ while (asic3_gpio_get(&asic->gpio, ASIC3_GPIO(C, cell->id)) != 0)
+ msleep(1);
+
+ asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]);
+
+ return 0;
+}
+
static struct mfd_cell asic3_cell_leds[ASIC3_NUM_LEDS] = {
[0] = {
.name = "leds-asic3",
.id = 0,
.enable = asic3_leds_enable,
.disable = asic3_leds_disable,
+ .suspend = asic3_leds_suspend,
+ .resume = asic3_leds_enable,
},
[1] = {
.name = "leds-asic3",
.id = 1,
.enable = asic3_leds_enable,
.disable = asic3_leds_disable,
+ .suspend = asic3_leds_suspend,
+ .resume = asic3_leds_enable,
},
[2] = {
.name = "leds-asic3",
.id = 2,
.enable = asic3_leds_enable,
.disable = asic3_leds_disable,
+ .suspend = asic3_leds_suspend,
+ .resume = asic3_leds_enable,
},
};
--
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