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mfd: mt6397: Modify suspend/resume behavior

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Some pmics don't need backup interrupt settings, so we change to use
pm notifier for the pmics which are necessary to store settings.

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Hsin-Hsiung Wang 2020-04-21 11:00:07 +08:00 committed by Lee Jones
parent 8f3d9f3542
commit 4e2e7cfec1
3 changed files with 36 additions and 31 deletions
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30
drivers/mfd/mt6397-core.c
View File

@ -100,35 +100,6 @@ static const struct mfd_cell mt6397_devs[] = {
}
};
#ifdef CONFIG_PM_SLEEP
static int mt6397_irq_suspend(struct device *dev)
{
struct mt6397_chip *chip = dev_get_drvdata(dev);
regmap_write(chip->regmap, chip->int_con[0], chip->wake_mask[0]);
regmap_write(chip->regmap, chip->int_con[1], 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, chip->int_con[0], chip->irq_masks_cur[0]);
regmap_write(chip->regmap, chip->int_con[1], 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);
struct chip_data {
u32 cid_addr;
u32 cid_shift;
@ -238,7 +209,6 @@ static struct platform_driver mt6397_driver = {
.driver = {
.name = "mt6397",
.of_match_table = of_match_ptr(mt6397_of_match),
.pm = &mt6397_pm_ops,
},
.id_table = mt6397_id,
};

35
drivers/mfd/mt6397-irq.c
View File

@ -9,6 +9,7 @@
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/suspend.h>
#include <linux/mfd/mt6323/core.h>
#include <linux/mfd/mt6323/registers.h>
#include <linux/mfd/mt6397/core.h>
@ -81,7 +82,7 @@ static struct irq_chip mt6397_irq_chip = {
static void mt6397_irq_handle_reg(struct mt6397_chip *mt6397, int reg,
int irqbase)
{
unsigned int status;
unsigned int status = 0;
int i, irq, ret;
ret = regmap_read(mt6397->regmap, reg, &status);
@ -128,6 +129,36 @@ static const struct irq_domain_ops mt6397_irq_domain_ops = {
.map = mt6397_irq_domain_map,
};
static int mt6397_irq_pm_notifier(struct notifier_block *notifier,
unsigned long pm_event, void *unused)
{
struct mt6397_chip *chip =
container_of(notifier, struct mt6397_chip, pm_nb);
switch (pm_event) {
case PM_SUSPEND_PREPARE:
regmap_write(chip->regmap,
chip->int_con[0], chip->wake_mask[0]);
regmap_write(chip->regmap,
chip->int_con[1], chip->wake_mask[1]);
enable_irq_wake(chip->irq);
break;
case PM_POST_SUSPEND:
regmap_write(chip->regmap,
chip->int_con[0], chip->irq_masks_cur[0]);
regmap_write(chip->regmap,
chip->int_con[1], chip->irq_masks_cur[1]);
disable_irq_wake(chip->irq);
break;
default:
break;
}
return NOTIFY_DONE;
}
int mt6397_irq_init(struct mt6397_chip *chip)
{
int ret;
@ -159,6 +190,7 @@ int mt6397_irq_init(struct mt6397_chip *chip)
regmap_write(chip->regmap, chip->int_con[0], 0x0);
regmap_write(chip->regmap, chip->int_con[1], 0x0);
chip->pm_nb.notifier_call = mt6397_irq_pm_notifier;
chip->irq_domain = irq_domain_add_linear(chip->dev->of_node,
MT6397_IRQ_NR,
&mt6397_irq_domain_ops,
@ -177,5 +209,6 @@ int mt6397_irq_init(struct mt6397_chip *chip)
return ret;
}
register_pm_notifier(&chip->pm_nb);
return 0;
}

2
include/linux/mfd/mt6397/core.h
View File

@ -8,6 +8,7 @@
#define __MFD_MT6397_CORE_H__
#include <linux/mutex.h>
#include <linux/notifier.h>
enum chip_id {
MT6323_CHIP_ID = 0x23,
@ -54,6 +55,7 @@ enum mt6397_irq_numbers {
struct mt6397_chip {
struct device *dev;
struct regmap *regmap;
struct notifier_block pm_nb;
int irq;
struct irq_domain *irq_domain;
struct mutex irqlock;