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authorHenry Chen <henryc.chen@mediatek.com>2015-08-10 16:10:45 +0300
committerLee Jones <lee.jones@linaro.org>2015-08-11 17:09:11 +0300
commitf3151ab4a7320ce3f48955fe796bd90dd00881ab (patch)
tree9360da8758a53b9975831988047648c316f7af4d /drivers/mfd
parentd9c93f5de8c84ccbb58fd88a530b730643fbb129 (diff)
downloadlinux-f3151ab4a7320ce3f48955fe796bd90dd00881ab.tar.xz
mfd: mt6397: Implement wake handler and suspend/resume to handle wake up event
Implement .irq_set_wake() to get who is wakeup source and setup on suspend/reumse. Enable mt6393_irq as wake up source properly to pinctrl by enable_irq_wake()/enable_irq_wake(). Signed-off-by: Henry Chen <henryc.chen@mediatek.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/mt6397-core.c49
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/mfd/mt6397-core.c b/drivers/mfd/mt6397-core.c
index 9ca290fec003..1749c1c9f405 100644
--- a/drivers/mfd/mt6397-core.c
+++ b/drivers/mfd/mt6397-core.c
@@ -93,12 +93,31 @@ static void mt6397_irq_enable(struct irq_data *data)
mt6397->irq_masks_cur[reg] |= BIT(shift);
}
+#ifdef CONFIG_PM_SLEEP
+static int mt6397_irq_set_wake(struct irq_data *irq_data, unsigned int on)
+{
+ struct mt6397_chip *mt6397 = irq_data_get_irq_chip_data(irq_data);
+ int shift = irq_data->hwirq & 0xf;
+ int reg = irq_data->hwirq >> 4;
+
+ if (on)
+ mt6397->wake_mask[reg] |= BIT(shift);
+ else
+ mt6397->wake_mask[reg] &= ~BIT(shift);
+
+ return 0;
+}
+#else
+#define mt6397_irq_set_wake NULL
+#endif
+
static struct irq_chip mt6397_irq_chip = {
.name = "mt6397-irq",
.irq_bus_lock = mt6397_irq_lock,
.irq_bus_sync_unlock = mt6397_irq_sync_unlock,
.irq_enable = mt6397_irq_enable,
.irq_disable = mt6397_irq_disable,
+ .irq_set_wake = mt6397_irq_set_wake,
};
static void mt6397_irq_handle_reg(struct mt6397_chip *mt6397, int reg,
@@ -179,6 +198,35 @@ static int mt6397_irq_init(struct mt6397_chip *mt6397)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int mt6397_irq_suspend(struct device *dev)
+{
+ struct mt6397_chip *chip = dev_get_drvdata(dev);
+
+ regmap_write(chip->regmap, MT6397_INT_CON0, chip->wake_mask[0]);
+ regmap_write(chip->regmap, MT6397_INT_CON1, chip->wake_mask[1]);
+
+ enable_irq_wake(chip->irq);
+
+ return 0;
+}
+
+static int mt6397_irq_resume(struct device *dev)
+{
+ struct mt6397_chip *chip = dev_get_drvdata(dev);
+
+ regmap_write(chip->regmap, MT6397_INT_CON0, chip->irq_masks_cur[0]);
+ regmap_write(chip->regmap, MT6397_INT_CON1, chip->irq_masks_cur[1]);
+
+ disable_irq_wake(chip->irq);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(mt6397_pm_ops, mt6397_irq_suspend,
+ mt6397_irq_resume);
+
static int mt6397_probe(struct platform_device *pdev)
{
int ret;
@@ -233,6 +281,7 @@ static struct platform_driver mt6397_driver = {
.driver = {
.name = "mt6397",
.of_match_table = of_match_ptr(mt6397_of_match),
+ .pm = &mt6397_pm_ops,
},
};