[PATCH v2 29/45] mfd: acer-a500: Use devm_register_power_handler()

Dmitry Osipenko
2021-10-27T21:22:57Z

Use devm_register_power_handler() that replaces global pm_power_off
variable and allows to register multiple power-off handlers. It also
provides restart-handler support, i.e. all in one API.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/mfd/acer-ec-a500.c | 52 ++++++++++++++------------------------
1 file changed, 19 insertions(+), 33 deletions(-)

diff --git a/drivers/mfd/acer-ec-a500.c b/drivers/mfd/acer-ec-a500.c
index 80c2fdd14fc4..fc864abc0049 100644
--- a/drivers/mfd/acer-ec-a500.c
+++ b/drivers/mfd/acer-ec-a500.c
@@ -31,8 +31,6 @@ enum {
REG_COLD_REBOOT = 0x55,
};

-static struct i2c_client *a500_ec_client_pm_off;
-
static int a500_ec_read(void *context, const void *reg_buf, size_t reg_size,
void *val_buf, size_t val_sizel)
{
@@ -104,32 +102,35 @@ static const struct regmap_bus a500_ec_regmap_bus = {
.max_raw_read = 2,
};

-static void a500_ec_poweroff(void)
+static void a500_ec_power_off_handler(struct power_off_data *data)
{
- i2c_smbus_write_word_data(a500_ec_client_pm_off,
- REG_SHUTDOWN, CMD_SHUTDOWN);
+ struct i2c_client *client = data->cb_data;
+
+ i2c_smbus_write_word_data(client, REG_SHUTDOWN, CMD_SHUTDOWN);

mdelay(A500_EC_POWER_CMD_TIMEOUT);
}

-static int a500_ec_restart_notify(struct notifier_block *this,
- unsigned long reboot_mode, void *data)
+static void a500_ec_restart_handler(struct restart_data *data)
{
- if (reboot_mode == REBOOT_WARM)
- i2c_smbus_write_word_data(a500_ec_client_pm_off,
+ struct i2c_client *client = data->cb_data;
+
+ if (data->mode == REBOOT_WARM)
+ i2c_smbus_write_word_data(client,
REG_WARM_REBOOT, CMD_WARM_REBOOT);
else
- i2c_smbus_write_word_data(a500_ec_client_pm_off,
+ i2c_smbus_write_word_data(client,
REG_COLD_REBOOT, CMD_COLD_REBOOT);

mdelay(A500_EC_POWER_CMD_TIMEOUT);
-
- return NOTIFY_DONE;
}

-static struct notifier_block a500_ec_restart_handler = {
- .notifier_call = a500_ec_restart_notify,
- .priority = 200,
+static struct power_handler a500_ec_power_handler = {
+ .restart_cb = a500_ec_restart_handler,
+ .restart_priority = RESTART_PRIO_HIGH,
+
+ .power_off_cb = a500_ec_power_off_handler,
+ .power_off_priority = POWEROFF_PRIO_HIGH,
};

static const struct mfd_cell a500_ec_cells[] = {
@@ -156,26 +157,12 @@ static int a500_ec_probe(struct i2c_client *client)
}

if (of_device_is_system_power_controller(client->dev.of_node)) {
- a500_ec_client_pm_off = client;
+ a500_ec_power_handler.cb_data = client;

- err = register_restart_handler(&a500_ec_restart_handler);
+ err = devm_register_power_handler(&client->dev,
+ &a500_ec_power_handler);
if (err)
return err;
-
- if (!pm_power_off)
- pm_power_off = a500_ec_poweroff;
- }
-
- return 0;
-}
-
-static int a500_ec_remove(struct i2c_client *client)
-{
- if (of_device_is_system_power_controller(client->dev.of_node)) {
- if (pm_power_off == a500_ec_poweroff)
- pm_power_off = NULL;
-
- unregister_restart_handler(&a500_ec_restart_handler);
}

return 0;
@@ -193,7 +180,6 @@ static struct i2c_driver a500_ec_driver = {
.of_match_table = a500_ec_match,
},
.probe_new = a500_ec_probe,
- .remove = a500_ec_remove,
};
module_i2c_driver(a500_ec_driver);

--
2.33.1