[PATCH v2 35/45] mfd: max8907: Use devm_register_simple_power_off_handler()

Dmitry Osipenko
2021-10-27T21:25:03Z

Use devm_register_simple_power_off_handler() that replaces global
pm_power_off variable and allows to register multiple power-off handlers.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/mfd/max8907.c | 22 +++++++++++++++-------
1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/drivers/mfd/max8907.c b/drivers/mfd/max8907.c
index 41f566e6a096..58699510311b 100644
--- a/drivers/mfd/max8907.c
+++ b/drivers/mfd/max8907.c
@@ -16,6 +16,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/reboot.h>
#include <linux/regmap.h>
#include <linux/slab.h>

@@ -174,9 +175,10 @@ static const struct regmap_irq_chip max8907_rtc_irq_chip = {
.num_irqs = ARRAY_SIZE(max8907_rtc_irqs),
};

-static struct max8907 *max8907_pm_off;
-static void max8907_power_off(void)
+static void max8907_power_off(void *data)
{
+ struct max8907 *max8907_pm_off = data;
+
regmap_update_bits(max8907_pm_off->regmap_gen, MAX8907_REG_RESET_CNFG,
MAX8907_MASK_POWER_OFF, MAX8907_MASK_POWER_OFF);
}
@@ -214,6 +216,17 @@ static int max8907_i2c_probe(struct i2c_client *i2c,
goto err_regmap_gen;
}

+ if (pm_off) {
+ ret = devm_register_simple_power_off_handler(&i2c->dev,
+ max8907_power_off,
+ max8907);
+ if (ret) {
+ dev_err(&i2c->dev,
+ "failed to register power-off handler: %d\n", ret);
+ return ret;
+ }
+ }
+
max8907->i2c_rtc = i2c_new_dummy_device(i2c->adapter, MAX8907_RTC_I2C_ADDR);
if (IS_ERR(max8907->i2c_rtc)) {
ret = PTR_ERR(max8907->i2c_rtc);
@@ -260,11 +273,6 @@ static int max8907_i2c_probe(struct i2c_client *i2c,
goto err_add_devices;
}

- if (pm_off && !pm_power_off) {
- max8907_pm_off = max8907;
- pm_power_off = max8907_power_off;
- }
-
return 0;

err_add_devices:
--
2.33.1