linux-kernel - Re: [PATCH v1] hwmon: (tmp103) Convert tmp103 to use new hwmon registration API

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Date:   Fri, 8 Oct 2021 07:19:01 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Jean Delvare <jdelvare@...e.com>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org,
        David Jander <david@...tonic.nl>
Subject: Re: [PATCH v1] hwmon: (tmp103) Convert tmp103 to use new hwmon
 registration API

On Thu, Oct 07, 2021 at 02:53:01PM +0200, Oleksij Rempel wrote:
> Use devm_hwmon_device_register_with_info() which will make thermal framework
> work.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>

Applied.

Thanks,
Guenter

> ---
>  drivers/hwmon/tmp103.c | 105 +++++++++++++++++++++++++++++------------
>  1 file changed, 74 insertions(+), 31 deletions(-)
> 
> diff --git a/drivers/hwmon/tmp103.c b/drivers/hwmon/tmp103.c
> index a7e202cc8323..5cab4436aa77 100644
> --- a/drivers/hwmon/tmp103.c
> +++ b/drivers/hwmon/tmp103.c
> @@ -51,51 +51,92 @@ static inline u8 tmp103_mc_to_reg(int val)
>  	return DIV_ROUND_CLOSEST(val, 1000);
>  }
>  
> -static ssize_t tmp103_temp_show(struct device *dev,
> -				struct device_attribute *attr, char *buf)
> +static int tmp103_read(struct device *dev, enum hwmon_sensor_types type,
> +		       u32 attr, int channel, long *temp)
>  {
> -	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
>  	struct regmap *regmap = dev_get_drvdata(dev);
>  	unsigned int regval;
> -	int ret;
> +	int err, reg;
> +
> +	switch (attr) {
> +	case hwmon_temp_input:
> +		reg = TMP103_TEMP_REG;
> +		break;
> +	case hwmon_temp_min:
> +		reg = TMP103_TLOW_REG;
> +		break;
> +	case hwmon_temp_max:
> +		reg = TMP103_THIGH_REG;
> +		break;
> +	default:
> +		return -EOPNOTSUPP;
> +	}
>  
> -	ret = regmap_read(regmap, sda->index, &regval);
> -	if (ret < 0)
> -		return ret;
> +	err = regmap_read(regmap, reg, &regval);
> +	if (err < 0)
> +		return err;
> +
> +	*temp = tmp103_reg_to_mc(regval);
>  
> -	return sprintf(buf, "%d\n", tmp103_reg_to_mc(regval));
> +	return 0;
>  }
>  
> -static ssize_t tmp103_temp_store(struct device *dev,
> -				 struct device_attribute *attr,
> -				 const char *buf, size_t count)
> +static int tmp103_write(struct device *dev, enum hwmon_sensor_types type,
> +			u32 attr, int channel, long temp)
>  {
> -	struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
>  	struct regmap *regmap = dev_get_drvdata(dev);
> -	long val;
> -	int ret;
> -
> -	if (kstrtol(buf, 10, &val) < 0)
> -		return -EINVAL;
> +	int reg;
> +
> +	switch (attr) {
> +	case hwmon_temp_min:
> +		reg = TMP103_TLOW_REG;
> +		break;
> +	case hwmon_temp_max:
> +		reg = TMP103_THIGH_REG;
> +		break;
> +	default:
> +		return -EOPNOTSUPP;
> +	}
>  
> -	val = clamp_val(val, -55000, 127000);
> -	ret = regmap_write(regmap, sda->index, tmp103_mc_to_reg(val));
> -	return ret ? ret : count;
> +	temp = clamp_val(temp, -55000, 127000);
> +	return regmap_write(regmap, reg, tmp103_mc_to_reg(temp));
>  }
>  
> -static SENSOR_DEVICE_ATTR_RO(temp1_input, tmp103_temp, TMP103_TEMP_REG);
> +static umode_t tmp103_is_visible(const void *data, enum hwmon_sensor_types type,
> +				 u32 attr, int channel)
> +{
> +	if (type != hwmon_temp)
> +		return 0;
> +
> +	switch (attr) {
> +	case hwmon_temp_input:
> +		return 0444;
> +	case hwmon_temp_min:
> +	case hwmon_temp_max:
> +		return 0644;
> +	default:
> +		return 0;
> +	}
> +}
>  
> -static SENSOR_DEVICE_ATTR_RW(temp1_min, tmp103_temp, TMP103_TLOW_REG);
> +static const struct hwmon_channel_info *tmp103_info[] = {
> +	HWMON_CHANNEL_INFO(chip,
> +			   HWMON_C_REGISTER_TZ),
> +	HWMON_CHANNEL_INFO(temp,
> +			   HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MIN),
> +	NULL
> +};
>  
> -static SENSOR_DEVICE_ATTR_RW(temp1_max, tmp103_temp, TMP103_THIGH_REG);
> +static const struct hwmon_ops tmp103_hwmon_ops = {
> +	.is_visible = tmp103_is_visible,
> +	.read = tmp103_read,
> +	.write = tmp103_write,
> +};
>  
> -static struct attribute *tmp103_attrs[] = {
> -	&sensor_dev_attr_temp1_input.dev_attr.attr,
> -	&sensor_dev_attr_temp1_min.dev_attr.attr,
> -	&sensor_dev_attr_temp1_max.dev_attr.attr,
> -	NULL
> +static const struct hwmon_chip_info tmp103_chip_info = {
> +	.ops = &tmp103_hwmon_ops,
> +	.info = tmp103_info,
>  };
> -ATTRIBUTE_GROUPS(tmp103);
>  
>  static bool tmp103_regmap_is_volatile(struct device *dev, unsigned int reg)
>  {
> @@ -130,8 +171,10 @@ static int tmp103_probe(struct i2c_client *client)
>  	}
>  
>  	i2c_set_clientdata(client, regmap);
> -	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
> -						      regmap, tmp103_groups);
> +	hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
> +							 regmap,
> +							 &tmp103_chip_info,
> +							 NULL);
>  	return PTR_ERR_OR_ZERO(hwmon_dev);
>  }
>