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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>
This commit is contained in:
Henry Chen 2015-08-10 21:10:45 +08:00 committed by Lee Jones
parent d9c93f5de8
commit f3151ab4a7
2 changed files with 50 additions and 0 deletions
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49
drivers/mfd/mt6397-core.c
View File

@ -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,
},
};

1
include/linux/mfd/mt6397/core.h
View File

@ -57,6 +57,7 @@ struct mt6397_chip {
int irq;
struct irq_domain *irq_domain;
struct mutex irqlock;
u16 wake_mask[2];
u16 irq_masks_cur[2];
u16 irq_masks_cache[2];
};