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Message-ID: <20230225170708.GA3995447@roeck-us.net>
Date: Sat, 25 Feb 2023 09:07:08 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Naresh Solanki <naresh.solanki@...ements.com>
Cc: Jean Delvare <jdelvare@...e.com>, linux-hwmon@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/4] hwmon: (pmbus/core) Generalise pmbus get status
On Fri, Feb 17, 2023 at 09:36:29AM +0100, Naresh Solanki wrote:
> Add function pmbus get status that can be used to get both pmbus
> specific status & regulator status
>
> Signed-off-by: Naresh Solanki <Naresh.Solanki@...ements.com>
For my reference:
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
> ...
> Changes in V3:
> - Add pmbus_is_enabled function
> Changes in V2:
> - Add __maybe attribute for pmbus_get_status function
> - Remove unrelated changes
> ---
> drivers/hwmon/pmbus/pmbus_core.c | 98 ++++++++++++++++++++------------
> 1 file changed, 62 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
> index 1b70cf3be313..f8ac9016ea0e 100644
> --- a/drivers/hwmon/pmbus/pmbus_core.c
> +++ b/drivers/hwmon/pmbus/pmbus_core.c
> @@ -2735,18 +2735,12 @@ static const struct pmbus_status_category __maybe_unused pmbus_status_flag_map[]
> },
> };
>
> -#if IS_ENABLED(CONFIG_REGULATOR)
> -static int pmbus_regulator_is_enabled(struct regulator_dev *rdev)
> +static int _pmbus_is_enabled(struct device *dev, u8 page)
> {
> - struct device *dev = rdev_get_dev(rdev);
> struct i2c_client *client = to_i2c_client(dev->parent);
> - struct pmbus_data *data = i2c_get_clientdata(client);
> - u8 page = rdev_get_id(rdev);
> int ret;
>
> - mutex_lock(&data->update_lock);
> ret = _pmbus_read_byte_data(client, page, PMBUS_OPERATION);
> - mutex_unlock(&data->update_lock);
>
> if (ret < 0)
> return ret;
> @@ -2754,58 +2748,38 @@ static int pmbus_regulator_is_enabled(struct regulator_dev *rdev)
> return !!(ret & PB_OPERATION_CONTROL_ON);
> }
>
> -static int _pmbus_regulator_on_off(struct regulator_dev *rdev, bool enable)
> +static int __maybe_unused pmbus_is_enabled(struct device *dev, u8 page)
> {
> - struct device *dev = rdev_get_dev(rdev);
> struct i2c_client *client = to_i2c_client(dev->parent);
> struct pmbus_data *data = i2c_get_clientdata(client);
> - u8 page = rdev_get_id(rdev);
> int ret;
>
> mutex_lock(&data->update_lock);
> - ret = pmbus_update_byte_data(client, page, PMBUS_OPERATION,
> - PB_OPERATION_CONTROL_ON,
> - enable ? PB_OPERATION_CONTROL_ON : 0);
> + ret = _pmbus_is_enabled(dev, page);
> mutex_unlock(&data->update_lock);
>
> - return ret;
> -}
> -
> -static int pmbus_regulator_enable(struct regulator_dev *rdev)
> -{
> - return _pmbus_regulator_on_off(rdev, 1);
> -}
> -
> -static int pmbus_regulator_disable(struct regulator_dev *rdev)
> -{
> - return _pmbus_regulator_on_off(rdev, 0);
> + return !!(ret & PB_OPERATION_CONTROL_ON);
> }
>
> -static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)
> +static int _pmbus_get_flags(struct pmbus_data *data, u8 page, unsigned int *flags)
> {
> int i, status;
> const struct pmbus_status_category *cat;
> const struct pmbus_status_assoc *bit;
> - struct device *dev = rdev_get_dev(rdev);
> - struct i2c_client *client = to_i2c_client(dev->parent);
> - struct pmbus_data *data = i2c_get_clientdata(client);
> - u8 page = rdev_get_id(rdev);
> + struct device *dev = data->dev;
> + struct i2c_client *client = to_i2c_client(dev);
> int func = data->info->func[page];
>
> *flags = 0;
>
> - mutex_lock(&data->update_lock);
> -
> for (i = 0; i < ARRAY_SIZE(pmbus_status_flag_map); i++) {
> cat = &pmbus_status_flag_map[i];
> if (!(func & cat->func))
> continue;
>
> status = _pmbus_read_byte_data(client, page, cat->reg);
> - if (status < 0) {
> - mutex_unlock(&data->update_lock);
> + if (status < 0)
> return status;
> - }
>
> for (bit = cat->bits; bit->pflag; bit++) {
> if (status & bit->pflag)
> @@ -2823,11 +2797,10 @@ static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned
> * REGULATOR_ERROR_<foo>_WARN.
> */
> status = pmbus_get_status(client, page, PMBUS_STATUS_WORD);
> - mutex_unlock(&data->update_lock);
> if (status < 0)
> return status;
>
> - if (pmbus_regulator_is_enabled(rdev)) {
> + if (_pmbus_is_enabled(dev, page)) {
> if (status & PB_STATUS_OFF)
> *flags |= REGULATOR_ERROR_FAIL;
>
> @@ -2855,6 +2828,59 @@ static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned
> return 0;
> }
>
> +static int __maybe_unused pmbus_get_flags(struct pmbus_data *data, u8 page, unsigned int *flags)
> +{
> + int ret;
> +
> + mutex_lock(&data->update_lock);
> + ret = _pmbus_get_flags(data, page, flags);
> + mutex_unlock(&data->update_lock);
> +
> + return ret;
> +}
> +
> +#if IS_ENABLED(CONFIG_REGULATOR)
> +static int pmbus_regulator_is_enabled(struct regulator_dev *rdev)
> +{
> + return pmbus_is_enabled(rdev_get_dev(rdev), rdev_get_id(rdev));
> +}
> +
> +static int _pmbus_regulator_on_off(struct regulator_dev *rdev, bool enable)
> +{
> + struct device *dev = rdev_get_dev(rdev);
> + struct i2c_client *client = to_i2c_client(dev->parent);
> + struct pmbus_data *data = i2c_get_clientdata(client);
> + u8 page = rdev_get_id(rdev);
> + int ret;
> +
> + mutex_lock(&data->update_lock);
> + ret = pmbus_update_byte_data(client, page, PMBUS_OPERATION,
> + PB_OPERATION_CONTROL_ON,
> + enable ? PB_OPERATION_CONTROL_ON : 0);
> + mutex_unlock(&data->update_lock);
> +
> + return ret;
> +}
> +
> +static int pmbus_regulator_enable(struct regulator_dev *rdev)
> +{
> + return _pmbus_regulator_on_off(rdev, 1);
> +}
> +
> +static int pmbus_regulator_disable(struct regulator_dev *rdev)
> +{
> + return _pmbus_regulator_on_off(rdev, 0);
> +}
> +
> +static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)
> +{
> + struct device *dev = rdev_get_dev(rdev);
> + struct i2c_client *client = to_i2c_client(dev->parent);
> + struct pmbus_data *data = i2c_get_clientdata(client);
> +
> + return pmbus_get_flags(data, rdev_get_id(rdev), flags);
> +}
> +
> static int pmbus_regulator_get_status(struct regulator_dev *rdev)
> {
> struct device *dev = rdev_get_dev(rdev);
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