[PATCH 01/13] mfd: rk808: convert to device managed resources

Sebastian Reichel
2022-08-31T21:55:05Z

Fully convert the driver to device managed resources.

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
---
drivers/mfd/rk808.c | 66 +++++++++++++++------------------------------
1 file changed, 22 insertions(+), 44 deletions(-)

diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c
index 4142b638e5fa..c17fea1d48ca 100644
--- a/drivers/mfd/rk808.c
+++ b/drivers/mfd/rk808.c
@@ -527,13 +527,11 @@ static const struct regmap_irq_chip rk818_irq_chip = {
.init_ack_masked = true,
};

-static struct i2c_client *rk808_i2c_client;
-
-static void rk808_pm_power_off(void)
+static int rk808_power_off(struct sys_off_data *data)
{
+ struct rk808 *rk808 = data->cb_data;
int ret;
unsigned int reg, bit;
- struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);

switch (rk808->variant) {
case RK805_ID:
@@ -554,16 +552,18 @@ static void rk808_pm_power_off(void)
bit = DEV_OFF;
break;
default:
- return;
+ return NOTIFY_DONE;
}
ret = regmap_update_bits(rk808->regmap, reg, bit, bit);
if (ret)
- dev_err(&rk808_i2c_client->dev, "Failed to shutdown device!\n");
+ dev_err(&rk808->i2c->dev, "Failed to shutdown device!\n");
+
+ return NOTIFY_DONE;
}

-static int rk808_restart_notify(struct notifier_block *this, unsigned long mode, void *cmd)
+static int rk808_restart(struct sys_off_data *data)
{
- struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
+ struct rk808 *rk808 = data->cb_data;
unsigned int reg, bit;
int ret;

@@ -579,16 +579,11 @@ static int rk808_restart_notify(struct notifier_block *this, unsigned long mode,
}
ret = regmap_update_bits(rk808->regmap, reg, bit, bit);
if (ret)
- dev_err(&rk808_i2c_client->dev, "Failed to restart device!\n");
+ dev_err(&rk808->i2c->dev, "Failed to restart device!\n");

return NOTIFY_DONE;
}

-static struct notifier_block rk808_restart_handler = {
- .notifier_call = rk808_restart_notify,
- .priority = 192,
-};
-
static void rk8xx_shutdown(struct i2c_client *client)
{
struct rk808 *rk808 = i2c_get_clientdata(client);
@@ -725,9 +720,9 @@ static int rk808_probe(struct i2c_client *client,
return -EINVAL;
}

- ret = regmap_add_irq_chip(rk808->regmap, client->irq,
- IRQF_ONESHOT, -1,
- rk808->regmap_irq_chip, &rk808->irq_data);
+ ret = devm_regmap_add_irq_chip(&client->dev, rk808->regmap, client->irq,
+ IRQF_ONESHOT, -1,
+ rk808->regmap_irq_chip, &rk808->irq_data);
if (ret) {
dev_err(&client->dev, "Failed to add irq_chip %d\n", ret);
return ret;
@@ -751,17 +746,23 @@ static int rk808_probe(struct i2c_client *client,
regmap_irq_get_domain(rk808->irq_data));
if (ret) {
dev_err(&client->dev, "failed to add MFD devices %d\n", ret);
- goto err_irq;
+ return ret;
}

if (of_property_read_bool(np, "rockchip,system-power-controller")) {
- rk808_i2c_client = client;
- pm_power_off = rk808_pm_power_off;
+ ret = devm_register_sys_off_handler(&client->dev,
+ SYS_OFF_MODE_POWER_OFF_PREPARE, SYS_OFF_PRIO_HIGH,
+ &rk808_power_off, rk808);
+ if (ret)
+ return dev_err_probe(&client->dev, ret,
+ "failed to register poweroff handler\n");

switch (rk808->variant) {
case RK809_ID:
case RK817_ID:
- ret = register_restart_handler(&rk808_restart_handler);
+ ret = devm_register_sys_off_handler(&client->dev,
+ SYS_OFF_MODE_RESTART, SYS_OFF_PRIO_HIGH,
+ &rk808_restart, rk808);
if (ret)
dev_warn(&client->dev, "failed to register rst handler, %d\n", ret);
break;
@@ -771,28 +772,6 @@ static int rk808_probe(struct i2c_client *client,
}
}

- return 0;
-
-err_irq:
- regmap_del_irq_chip(client->irq, rk808->irq_data);
- return ret;
-}
-
-static int rk808_remove(struct i2c_client *client)
-{
- struct rk808 *rk808 = i2c_get_clientdata(client);
-
- regmap_del_irq_chip(client->irq, rk808->irq_data);
-
- /**
- * pm_power_off may points to a function from another module.
- * Check if the pointer is set by us and only then overwrite it.
- */
- if (pm_power_off == rk808_pm_power_off)
- pm_power_off = NULL;
-
- unregister_restart_handler(&rk808_restart_handler);
-
return 0;
}

@@ -850,7 +829,6 @@ static struct i2c_driver rk808_i2c_driver = {
.pm = &rk8xx_pm_ops,
},
.probe = rk808_probe,
- .remove = rk808_remove,
.shutdown = rk8xx_shutdown,
};

--
2.35.1