On Fri, Aug 19, 2022 at 10:18:46PM +0300, Matti Vaittinen wrote:
> Drop open-coded pattern: 'devm_regulator_get(), regulator_enable(),
> add_action_or_reset(regulator_disable)' and use the
> devm_regulator_get_enable() and drop the pointer to the regulator.
> This simplifies code and makes it less tempting to add manual control
> for the regulator which is also controlled by devm.
>
> Signed-off-by: Matti Vaittinen <mazziesaccount@xxxxxxxxx>
Acked-by: Guenter Roeck <linux@xxxxxxxxxxxx>
>
> ---
> v2 => v3:
> New patch
> ---
> drivers/hwmon/adm1177.c | 27 +++------------------------
> 1 file changed, 3 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/hwmon/adm1177.c b/drivers/hwmon/adm1177.c
> index 0c5dbc5e33b4..be17a26a84f1 100644
> --- a/drivers/hwmon/adm1177.c
> +++ b/drivers/hwmon/adm1177.c
> @@ -26,14 +26,12 @@
> /**
> * struct adm1177_state - driver instance specific data
> * @client: pointer to i2c client
> - * @reg: regulator info for the power supply of the device
> * @r_sense_uohm: current sense resistor value
> * @alert_threshold_ua: current limit for shutdown
> * @vrange_high: internal voltage divider
> */
> struct adm1177_state {
> struct i2c_client *client;
> - struct regulator *reg;
> u32 r_sense_uohm;
> u32 alert_threshold_ua;
> bool vrange_high;
> @@ -189,13 +187,6 @@ static const struct hwmon_chip_info adm1177_chip_info = {
> .info = adm1177_info,
> };
>
> -static void adm1177_remove(void *data)
> -{
> - struct adm1177_state *st = data;
> -
> - regulator_disable(st->reg);
> -}
> -
> static int adm1177_probe(struct i2c_client *client)
> {
> struct device *dev = &client->dev;
> @@ -210,21 +201,9 @@ static int adm1177_probe(struct i2c_client *client)
>
> st->client = client;
>
> - st->reg = devm_regulator_get_optional(&client->dev, "vref");
> - if (IS_ERR(st->reg)) {
> - if (PTR_ERR(st->reg) == -EPROBE_DEFER)
> - return -EPROBE_DEFER;
> -
> - st->reg = NULL;
> - } else {
> - ret = regulator_enable(st->reg);
> - if (ret)
> - return ret;
> - ret = devm_add_action_or_reset(&client->dev, adm1177_remove,
> - st);
> - if (ret)
> - return ret;
> - }
> + ret = devm_regulator_get_enable_optional(&client->dev, "vref");
> + if (ret == -EPROBE_DEFER)
> + return -EPROBE_DEFER;
>
> if (device_property_read_u32(dev, "shunt-resistor-micro-ohms",
> &st->r_sense_uohm))
> --
> 2.37.1
>
>
> --
> Matti Vaittinen, Linux device drivers
> ROHM Semiconductors, Finland SWDC
> Kiviharjunlenkki 1E
> 90220 OULU
> FINLAND
>
> ~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
> Simon says - in Latin please.
> ~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
> Thanks to Simon Glass for the translation =]
