* [PATCH 2/6] mfd/ab8500: handle the irq for suspend/resume
@ 2012-04-17 7:30 Linus Walleij
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From: Linus Walleij @ 2012-04-17 7:30 UTC (permalink / raw)
To: Samuel Ortiz, linux-kernel; +Cc: Rabin Vincent, Linus Walleij
From: Rabin Vincent <rabin.vincent@stericsson.com>
Ensure that the AB interrupt is only handled at a time when
all core drivers are resumed. Ensure that the AB interrupt
is marked as a wakeup interrupt.
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com>
Reviewed-by: Mattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/mfd/ab8500-i2c.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/drivers/mfd/ab8500-i2c.c b/drivers/mfd/ab8500-i2c.c
index b83045f..89b31a3 100644
--- a/drivers/mfd/ab8500-i2c.c
+++ b/drivers/mfd/ab8500-i2c.c
@@ -101,10 +101,42 @@ static const struct platform_device_id ab8500_id[] = {
{ }
};
+#ifdef CONFIG_PM
+static int ab8500_i2c_suspend(struct device *dev)
+{
+ struct ab8500 *ab = dev_get_drvdata(dev);
+
+ disable_irq(ab->irq);
+ enable_irq_wake(ab->irq);
+
+ return 0;
+}
+
+static int ab8500_i2c_resume(struct device *dev)
+{
+ struct ab8500 *ab = dev_get_drvdata(dev);
+
+ disable_irq_wake(ab->irq);
+ enable_irq(ab->irq);
+
+ return 0;
+}
+
+static const struct dev_pm_ops ab8500_i2c_pm_ops = {
+ .suspend = ab8500_i2c_suspend,
+ .resume = ab8500_i2c_resume,
+};
+
+#define AB8500_I2C_PM_OPS (&ab8500_i2c_pm_ops)
+#else
+#define AB8500_I2C_PM_OPS NULL
+#endif
+
static struct platform_driver ab8500_i2c_driver = {
.driver = {
.name = "ab8500-i2c",
.owner = THIS_MODULE,
+ .pm = AB8500_I2C_PM_OPS,
},
.probe = ab8500_i2c_probe,
.remove = __devexit_p(ab8500_i2c_remove),
--
1.7.9.2
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2012-04-17 7:30 [PATCH 2/6] mfd/ab8500: handle the irq for suspend/resume Linus Walleij
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