linux-kernel - Re: [PATCH v2] hwmon: pm_bus: core: Implement regulator get

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Date:   Fri, 18 Nov 2022 04:11:44 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Naresh Solanki <naresh.solanki@...ements.com>
Cc:     linux-hwmon@...r.kernel.org, Jean Delvare <jdelvare@...e.com>,
        Patrick Rudolph <patrick.rudolph@...ements.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] hwmon: pm_bus: core: Implement regulator get_status

On Fri, Nov 18, 2022 at 09:46:36AM +0100, Naresh Solanki wrote:
> From: Patrick Rudolph <patrick.rudolph@...ements.com>
> 
> Add get_status for pmbus_regulator_ops.
> 
> Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
> Signed-off-by: Naresh Solanki <Naresh.Solanki@...ements.com>

Just noticed: The subject should start with "hwmon: (pmbus/core)"

Thanks,
Guenter

> ---
>  drivers/hwmon/pmbus/pmbus_core.c | 72 ++++++++++++++++++++++++++++++++
>  1 file changed, 72 insertions(+)
> 
> diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
> index 7ec04934747e..5dde345c7679 100644
> --- a/drivers/hwmon/pmbus/pmbus_core.c
> +++ b/drivers/hwmon/pmbus/pmbus_core.c
> @@ -2851,6 +2851,77 @@ static int pmbus_regulator_get_error_flags(struct regulator_dev *rdev, unsigned
>  	return 0;
>  }
>  
> +static int pmbus_regulator_get_status(struct regulator_dev *rdev)
> +{
> +	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 status, status2;
> +
> +	mutex_lock(&data->update_lock);
> +	status = pmbus_get_status(client, page, PMBUS_STATUS_WORD);
> +	mutex_unlock(&data->update_lock);
> +	if (status < 0)
> +		return status;
> +
> +	if (status & (PB_STATUS_VIN_UV | PB_STATUS_IOUT_OC | PB_STATUS_VOUT_OV |
> +	    PB_STATUS_UNKNOWN))
> +		return REGULATOR_STATUS_ERROR;
> +
> +	if (status & (PB_STATUS_OFF | PB_STATUS_POWER_GOOD_N))
> +		return REGULATOR_STATUS_OFF;
> +
> +	if (status & PB_STATUS_VOUT &&
> +	    data->info->func[page] & PMBUS_HAVE_STATUS_VOUT) {
> +		mutex_lock(&data->update_lock);
> +		status2 = _pmbus_read_byte_data(client, page,
> +					 PMBUS_STATUS_VOUT);
> +		mutex_unlock(&data->update_lock);
> +		if (status2 < 0)
> +			return status2;
> +		if (status2 & (PB_VOLTAGE_OV_FAULT | PB_VOLTAGE_UV_FAULT))
> +			return REGULATOR_STATUS_ERROR;
> +	}
> +	if (status & PB_STATUS_IOUT_POUT &&
> +	    data->info->func[page] & PMBUS_HAVE_STATUS_IOUT) {
> +		mutex_lock(&data->update_lock);
> +		status2 = _pmbus_read_byte_data(client, page,
> +						 PMBUS_STATUS_IOUT);
> +		mutex_unlock(&data->update_lock);
> +		if (status2 < 0)
> +			return status2;
> +		if (status2 & (PB_POUT_OP_FAULT | PB_IOUT_UC_FAULT |
> +		    PB_IOUT_OC_LV_FAULT | PB_IOUT_OC_FAULT))
> +			return REGULATOR_STATUS_ERROR;
> +	}
> +	if (status & PB_STATUS_INPUT &&
> +	    data->info->func[page] & PMBUS_HAVE_STATUS_INPUT) {
> +		mutex_lock(&data->update_lock);
> +		status2 = _pmbus_read_byte_data(client, page,
> +						 PMBUS_STATUS_INPUT);
> +		mutex_unlock(&data->update_lock);
> +		if (status2 < 0)
> +			return status2;
> +		if (status2 & (PB_IIN_OC_FAULT | PB_VOLTAGE_OV_FAULT |
> +		    PB_VOLTAGE_UV_FAULT))
> +			return REGULATOR_STATUS_ERROR;
> +	}
> +	if (status & PB_STATUS_TEMPERATURE &&
> +	    data->info->func[page] & PMBUS_HAVE_STATUS_TEMP) {
> +		mutex_lock(&data->update_lock);
> +		status2 = _pmbus_read_byte_data(client, page,
> +						 PMBUS_STATUS_TEMPERATURE);
> +		mutex_unlock(&data->update_lock);
> +		if (status2 < 0)
> +			return status2;
> +		if (status2 & (PB_TEMP_UT_FAULT | PB_TEMP_OT_FAULT))
> +			return REGULATOR_STATUS_ERROR;
> +	}
> +
> +	return REGULATOR_STATUS_ON;
> +}
> +
>  static int pmbus_regulator_get_low_margin(struct i2c_client *client, int page)
>  {
>  	struct pmbus_data *data = i2c_get_clientdata(client);
> @@ -2991,6 +3062,7 @@ const struct regulator_ops pmbus_regulator_ops = {
>  	.disable = pmbus_regulator_disable,
>  	.is_enabled = pmbus_regulator_is_enabled,
>  	.get_error_flags = pmbus_regulator_get_error_flags,
> +	.get_status = pmbus_regulator_get_status,
>  	.get_voltage = pmbus_regulator_get_voltage,
>  	.set_voltage = pmbus_regulator_set_voltage,
>  	.list_voltage = pmbus_regulator_list_voltage,
> 
> base-commit: 27fea302952d8c90cafbdbee96bafeca03544401
> -- 
> 2.37.3
>