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From: Chris Packham <Chris.Packham@alliedtelesis.co.nz>
To: Guenter Roeck <linux@roeck-us.net>
Cc: "jdelvare@suse.com" <jdelvare@suse.com>,
	"linux-hwmon@vger.kernel.org" <linux-hwmon@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] hwmon: (adt7470) Convert to devm_hwmon_device_register_with_info API
Date: Tue, 24 Aug 2021 21:15:46 +0000	[thread overview]
Message-ID: <e7c21c5c-9ce6-faf9-7653-df4456786dca@alliedtelesis.co.nz> (raw)
In-Reply-To: <20210824210757.GA3418382@roeck-us.net>


On 25/08/21 9:07 am, Guenter Roeck wrote:
> Chris,
>
> On Wed, Jun 23, 2021 at 12:20:57PM +1200, Chris Packham wrote:
>> Use the devm_hwmon_device_register_with_info and convert to using regmap
>> with better error handling.
>>
>> While at it clean up some checkpatch warnings.
>>
>> Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
> I have now tried several times to review this patch, and I always
> get stuck due to its complexity. Would it be possible to split it into
> multiple individual patches to simplify review ? There should be at
> least two patches, one to introduce regmap and the second to convert
> the driver to use devm_hwmon_device_register_with_info.
Sure can do. It may take me a while to get round to it but I don't think 
anyone is desperate for this change.
>
> Thanks,
> Guenter
>
>> ---
>>
>> Technically this is a v2 of an earlier patch[1] but because it's been a
>> while and there are fairly major changes since the earlier version it's
>> probably best considered as a new patch.
>>
>> I haven't gone all the way to remove the local caching in favor of fully
>> utilizing regmap because there are some complications with the way the
>> remote temperature sensors work so some caching is inevitable.
>> --
>> [1] - https://scanmail.trustwave.com/?c=20988&d=td-l4QBdeIBPk9vhsrJcOqHAKeRbiCctbcK9CW1O0A&u=https%3a%2f%2flore%2ekernel%2eorg%2flinux-hwmon%2f20201019223423%2e31488-3-chris%2epackham%40alliedtelesis%2eco%2enz%2f
>>
>>   drivers/hwmon/adt7470.c | 1082 ++++++++++++++++++---------------------
>>   1 file changed, 511 insertions(+), 571 deletions(-)
>>
>> diff --git a/drivers/hwmon/adt7470.c b/drivers/hwmon/adt7470.c
>> index 2e8feacccf84..24d210def09b 100644
>> --- a/drivers/hwmon/adt7470.c
>> +++ b/drivers/hwmon/adt7470.c
>> @@ -6,8 +6,6 @@
>>    * Author: Darrick J. Wong <darrick.wong@oracle.com>
>>    */
>>   
>> -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>> -
>>   #include <linux/module.h>
>>   #include <linux/jiffies.h>
>>   #include <linux/i2c.h>
>> @@ -18,6 +16,7 @@
>>   #include <linux/delay.h>
>>   #include <linux/log2.h>
>>   #include <linux/kthread.h>
>> +#include <linux/regmap.h>
>>   #include <linux/slab.h>
>>   #include <linux/util_macros.h>
>>   
>> @@ -35,7 +34,10 @@ static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
>>   #define ADT7470_REG_PWM_MAX_BASE_ADDR		0x38
>>   #define ADT7470_REG_PWM_MAX_MAX_ADDR		0x3B
>>   #define ADT7470_REG_CFG				0x40
>> +#define		ADT7470_STRT_MASK		0x01
>> +#define		ADT7470_TEST_MASK		0x02
>>   #define		ADT7470_FSPD_MASK		0x04
>> +#define		ADT7470_T05_STB_MASK		0x80
>>   #define ADT7470_REG_ALARM1			0x41
>>   #define		ADT7470_R1T_ALARM		0x01
>>   #define		ADT7470_R2T_ALARM		0x02
>> @@ -137,7 +139,7 @@ static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
>>   #define ADT7470_FREQ_SHIFT	4
>>   
>>   struct adt7470_data {
>> -	struct i2c_client	*client;
>> +	struct regmap		*regmap;
>>   	struct mutex		lock;
>>   	char			sensors_valid;
>>   	char			limits_valid;
>> @@ -154,7 +156,7 @@ struct adt7470_data {
>>   	u16			fan_min[ADT7470_FAN_COUNT];
>>   	u16			fan_max[ADT7470_FAN_COUNT];
>>   	u16			alarm;
>> -	u16			alarms_mask;
>> +	unsigned int		alarms_mask;
>>   	u8			force_pwm_max;
>>   	u8			pwm[ADT7470_PWM_COUNT];
>>   	u8			pwm_max[ADT7470_PWM_COUNT];
>> @@ -171,51 +173,76 @@ struct adt7470_data {
>>    * 16-bit registers on the ADT7470 are low-byte first.  The data sheet says
>>    * that the low byte must be read before the high byte.
>>    */
>> -static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg)
>> +static inline int adt7470_read_word_data(struct adt7470_data *data, unsigned int reg,
>> +					 unsigned int *val)
>>   {
>> -	u16 foo;
>> -	foo = i2c_smbus_read_byte_data(client, reg);
>> -	foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
>> -	return foo;
>> +	u8 regval[2];
>> +	int err;
>> +
>> +	err = regmap_bulk_read(data->regmap, reg, &regval, 2);
>> +	if (err < 0)
>> +		return err;
>> +
>> +	*val = regval[0] | (regval[1] << 8);
>> +
>> +	return 0;
>>   }
>>   
>> -static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
>> -					  u16 value)
>> +static inline int adt7470_write_word_data(struct adt7470_data *data, unsigned int reg,
>> +					  unsigned int val)
>>   {
>> -	return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
>> -	       || i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
>> +	u8 regval[2];
>> +
>> +	regval[0] = val & 0xFF;
>> +	regval[1] = val >> 8;
>> +
>> +	return regmap_bulk_write(data->regmap, reg, &regval, 2);
>>   }
>>   
>>   /* Probe for temperature sensors.  Assumes lock is held */
>> -static int adt7470_read_temperatures(struct i2c_client *client,
>> -				     struct adt7470_data *data)
>> +static int adt7470_read_temperatures(struct adt7470_data *data)
>>   {
>>   	unsigned long res;
>> +	unsigned int pwm_cfg[2];
>> +	int err;
>>   	int i;
>> -	u8 cfg, pwm[4], pwm_cfg[2];
>> +	u8 pwm[ADT7470_FAN_COUNT];
>>   
>>   	/* save pwm[1-4] config register */
>> -	pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0));
>> -	pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2));
>> +	err = regmap_read(data->regmap, ADT7470_REG_PWM_CFG(0), &pwm_cfg[0]);
>> +	if (err < 0)
>> +		return err;
>> +	err = regmap_read(data->regmap, ADT7470_REG_PWM_CFG(2), &pwm_cfg[1]);
>> +	if (err < 0)
>> +		return err;
>>   
>>   	/* set manual pwm to whatever it is set to now */
>> -	for (i = 0; i < ADT7470_FAN_COUNT; i++)
>> -		pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i));
>> +	err = regmap_bulk_read(data->regmap, ADT7470_REG_PWM(0), &pwm[0],
>> +			       ADT7470_PWM_COUNT);
>> +	if (err < 0)
>> +		return err;
>>   
>>   	/* put pwm in manual mode */
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0),
>> -		pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK));
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2),
>> -		pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK));
>> +	err = regmap_update_bits(data->regmap, ADT7470_REG_PWM_CFG(0),
>> +				 ADT7470_PWM_AUTO_MASK, 0);
>> +	if (err < 0)
>> +		return err;
>> +	err = regmap_update_bits(data->regmap, ADT7470_REG_PWM_CFG(2),
>> +				 ADT7470_PWM_AUTO_MASK, 0);
>> +	if (err < 0)
>> +		return err;
>>   
>>   	/* write pwm control to whatever it was */
>> -	for (i = 0; i < ADT7470_FAN_COUNT; i++)
>> -		i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]);
>> +	err = regmap_bulk_write(data->regmap, ADT7470_REG_PWM(0), &pwm[0],
>> +				ADT7470_PWM_COUNT);
>> +	if (err < 0)
>> +		return err;
>>   
>>   	/* start reading temperature sensors */
>> -	cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
>> -	cfg |= 0x80;
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
>> +	err = regmap_update_bits(data->regmap, ADT7470_REG_CFG,
>> +				 ADT7470_T05_STB_MASK, ADT7470_T05_STB_MASK);
>> +	if (err < 0)
>> +		return err;
>>   
>>   	/* Delay is 200ms * number of temp sensors. */
>>   	res = msleep_interruptible((data->num_temp_sensors >= 0 ?
>> @@ -223,26 +250,31 @@ static int adt7470_read_temperatures(struct i2c_client *client,
>>   				    TEMP_COLLECTION_TIME));
>>   
>>   	/* done reading temperature sensors */
>> -	cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
>> -	cfg &= ~0x80;
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
>> +	err = regmap_update_bits(data->regmap, ADT7470_REG_CFG,
>> +				 ADT7470_T05_STB_MASK, 0);
>> +	if (err < 0)
>> +		return err;
>>   
>>   	/* restore pwm[1-4] config registers */
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
>> +	err = regmap_write(data->regmap, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
>> +	if (err < 0)
>> +		return err;
>> +	err = regmap_write(data->regmap, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
>> +	if (err < 0)
>> +		return err;
>>   
>> -	if (res) {
>> -		pr_err("ha ha, interrupted\n");
>> +	if (res)
>>   		return -EAGAIN;
>> -	}
>>   
>>   	/* Only count fans if we have to */
>>   	if (data->num_temp_sensors >= 0)
>>   		return 0;
>>   
>> +	err = regmap_bulk_read(data->regmap, ADT7470_TEMP_REG(0), &data->temp[0],
>> +			       ADT7470_TEMP_COUNT);
>> +	if (err < 0)
>> +		return err;
>>   	for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
>> -		data->temp[i] = i2c_smbus_read_byte_data(client,
>> -						ADT7470_TEMP_REG(i));
>>   		if (data->temp[i])
>>   			data->num_temp_sensors = i + 1;
>>   	}
>> @@ -254,12 +286,16 @@ static int adt7470_update_thread(void *p)
>>   {
>>   	struct i2c_client *client = p;
>>   	struct adt7470_data *data = i2c_get_clientdata(client);
>> +	int err = 0;
>>   
>>   	while (!kthread_should_stop()) {
>>   		mutex_lock(&data->lock);
>> -		adt7470_read_temperatures(client, data);
>> +		err = adt7470_read_temperatures(data);
>>   		mutex_unlock(&data->lock);
>>   
>> +		if (err < 0)
>> +			dev_warn(&client->dev, "temperature read failed %d\n", err);
>> +
>>   		set_current_state(TASK_INTERRUPTIBLE);
>>   		if (kthread_should_stop())
>>   			break;
>> @@ -272,89 +308,106 @@ static int adt7470_update_thread(void *p)
>>   
>>   static int adt7470_update_sensors(struct adt7470_data *data)
>>   {
>> -	struct i2c_client *client = data->client;
>> -	u8 cfg;
>> +	unsigned int val;
>> +	int err;
>>   	int i;
>>   
>>   	if (!data->temperatures_probed)
>> -		adt7470_read_temperatures(client, data);
>> +		err = adt7470_read_temperatures(data);
>>   	else
>> -		for (i = 0; i < ADT7470_TEMP_COUNT; i++)
>> -			data->temp[i] = i2c_smbus_read_byte_data(client,
>> -						ADT7470_TEMP_REG(i));
>> +		err = regmap_bulk_read(data->regmap, ADT7470_TEMP_REG(0), &data->temp[0],
>> +				       ADT7470_TEMP_COUNT);
>> +	if (err < 0)
>> +		return err;
>>   
>> -	for (i = 0; i < ADT7470_FAN_COUNT; i++)
>> -		data->fan[i] = adt7470_read_word_data(client,
>> -						ADT7470_REG_FAN(i));
>> -
>> -	for (i = 0; i < ADT7470_PWM_COUNT; i++) {
>> -		int reg;
>> -		int reg_mask;
>> -
>> -		data->pwm[i] = i2c_smbus_read_byte_data(client,
>> -						ADT7470_REG_PWM(i));
>> -
>> -		if (i % 2)
>> -			reg_mask = ADT7470_PWM2_AUTO_MASK;
>> -		else
>> -			reg_mask = ADT7470_PWM1_AUTO_MASK;
>> -
>> -		reg = ADT7470_REG_PWM_CFG(i);
>> -		if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
>> -			data->pwm_automatic[i] = 1;
>> -		else
>> -			data->pwm_automatic[i] = 0;
>> -
>> -		reg = ADT7470_REG_PWM_AUTO_TEMP(i);
>> -		cfg = i2c_smbus_read_byte_data(client, reg);
>> -		if (!(i % 2))
>> -			data->pwm_auto_temp[i] = cfg >> 4;
>> -		else
>> -			data->pwm_auto_temp[i] = cfg & 0xF;
>> +	for (i = 0; i < ADT7470_FAN_COUNT; i++) {
>> +		err = adt7470_read_word_data(data, ADT7470_REG_FAN(i), &val);
>> +		if (err < 0)
>> +			return err;
>> +		data->fan[i] =	val;
>>   	}
>>   
>> -	if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
>> -	    ADT7470_FSPD_MASK)
>> -		data->force_pwm_max = 1;
>> -	else
>> -		data->force_pwm_max = 0;
>> +	err = regmap_bulk_read(data->regmap, ADT7470_REG_PWM(0), &data->pwm[0], ADT7470_PWM_COUNT);
>> +	if (err < 0)
>> +		return err;
>>   
>> -	data->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
>> -	if (data->alarm & ADT7470_OOL_ALARM)
>> -		data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
>> -							ADT7470_REG_ALARM2));
>> -	data->alarms_mask = adt7470_read_word_data(client,
>> -						   ADT7470_REG_ALARM1_MASK);
>> +	for (i = 0; i < ADT7470_PWM_COUNT; i++) {
>> +		unsigned int mask;
>>   
>> -	return 0;
>> +		if (i % 2)
>> +			mask = ADT7470_PWM2_AUTO_MASK;
>> +		else
>> +			mask = ADT7470_PWM1_AUTO_MASK;
>> +
>> +		err = regmap_read(data->regmap, ADT7470_REG_PWM_CFG(i), &val);
>> +		if (err < 0)
>> +			return err;
>> +		data->pwm_automatic[i] = !!(val & mask);
>> +
>> +		err = regmap_read(data->regmap, ADT7470_REG_PWM_AUTO_TEMP(i), &val);
>> +		if (err < 0)
>> +			return err;
>> +		if (!(i % 2))
>> +			data->pwm_auto_temp[i] = val >> 4;
>> +		else
>> +			data->pwm_auto_temp[i] = val & 0xF;
>> +	}
>> +
>> +	err = regmap_read(data->regmap, ADT7470_REG_ALARM1, &val);
>> +	if (err < 0)
>> +		return err;
>> +	data->alarm = val;
>> +	if (data->alarm & ADT7470_OOL_ALARM) {
>> +		err = regmap_read(data->regmap, ADT7470_REG_ALARM2, &val);
>> +		if (err < 0)
>> +			return err;
>> +		data->alarm |= ALARM2(val);
>> +	}
>> +
>> +	return adt7470_read_word_data(data, ADT7470_REG_ALARM1_MASK, &data->alarms_mask);
>>   }
>>   
>>   static int adt7470_update_limits(struct adt7470_data *data)
>>   {
>> -	struct i2c_client *client = data->client;
>> +	unsigned int val;
>> +	int err;
>>   	int i;
>>   
>>   	for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
>> -		data->temp_min[i] = i2c_smbus_read_byte_data(client,
>> -						ADT7470_TEMP_MIN_REG(i));
>> -		data->temp_max[i] = i2c_smbus_read_byte_data(client,
>> -						ADT7470_TEMP_MAX_REG(i));
>> +		err = regmap_read(data->regmap, ADT7470_TEMP_MIN_REG(i), &val);
>> +		if (err < 0)
>> +			return err;
>> +		data->temp_min[i] = (s8)val;
>> +		err = regmap_read(data->regmap, ADT7470_TEMP_MAX_REG(i), &val);
>> +		if (err < 0)
>> +			return err;
>> +		data->temp_max[i] = (s8)val;
>>   	}
>>   
>>   	for (i = 0; i < ADT7470_FAN_COUNT; i++) {
>> -		data->fan_min[i] = adt7470_read_word_data(client,
>> -						ADT7470_REG_FAN_MIN(i));
>> -		data->fan_max[i] = adt7470_read_word_data(client,
>> -						ADT7470_REG_FAN_MAX(i));
>> +		err = adt7470_read_word_data(data, ADT7470_REG_FAN_MIN(i), &val);
>> +		if (err < 0)
>> +			return err;
>> +		data->fan_min[i] = val;
>> +		err = adt7470_read_word_data(data, ADT7470_REG_FAN_MAX(i), &val);
>> +		if (err < 0)
>> +			return err;
>> +		data->fan_max[i] = val;
>>   	}
>>   
>>   	for (i = 0; i < ADT7470_PWM_COUNT; i++) {
>> -		data->pwm_max[i] = i2c_smbus_read_byte_data(client,
>> -						ADT7470_REG_PWM_MAX(i));
>> -		data->pwm_min[i] = i2c_smbus_read_byte_data(client,
>> -						ADT7470_REG_PWM_MIN(i));
>> -		data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
>> -						ADT7470_REG_PWM_TMIN(i));
>> +		err = regmap_read(data->regmap, ADT7470_REG_PWM_MAX(i), &val);
>> +		if (err < 0)
>> +			return err;
>> +		data->pwm_max[i] = val;
>> +		err = regmap_read(data->regmap, ADT7470_REG_PWM_MIN(i), &val);
>> +		if (err < 0)
>> +			return err;
>> +		data->pwm_min[i] = val;
>> +		err = regmap_read(data->regmap, ADT7470_REG_PWM_TMIN(i), &val);
>> +		if (err < 0)
>> +			return err;
>> +		data->pwm_tmin[i] = (s8)val;
>>   	}
>>   
>>   	return 0;
>> @@ -443,10 +496,7 @@ static ssize_t num_temp_sensors_show(struct device *dev,
>>   				     struct device_attribute *devattr,
>>   				     char *buf)
>>   {
>> -	struct adt7470_data *data = adt7470_update_device(dev);
>> -
>> -	if (IS_ERR(data))
>> -		return PTR_ERR(data);
>> +	struct adt7470_data *data = dev_get_drvdata(dev);
>>   
>>   	return sprintf(buf, "%d\n", data->num_temp_sensors);
>>   }
>> @@ -472,98 +522,66 @@ static ssize_t num_temp_sensors_store(struct device *dev,
>>   	return count;
>>   }
>>   
>> -static ssize_t temp_min_show(struct device *dev,
>> -			     struct device_attribute *devattr, char *buf)
>> +static int adt7470_temp_read(struct device *dev, u32 attr, int channel, long *val)
>>   {
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>>   	struct adt7470_data *data = adt7470_update_device(dev);
>>   
>>   	if (IS_ERR(data))
>>   		return PTR_ERR(data);
>>   
>> -	return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
>> +	switch (attr) {
>> +	case hwmon_temp_input:
>> +		*val = 1000 * data->temp[channel];
>> +		break;
>> +	case hwmon_temp_min:
>> +		*val = 1000 * data->temp_min[channel];
>> +		break;
>> +	case hwmon_temp_max:
>> +		*val = 1000 * data->temp_max[channel];
>> +		break;
>> +	case hwmon_temp_alarm:
>> +		*val = !!(data->alarm & channel);
>> +		break;
>> +	default:
>> +		return -EOPNOTSUPP;
>> +	}
>> +
>> +	return 0;
>>   }
>>   
>> -static ssize_t temp_min_store(struct device *dev,
>> -			      struct device_attribute *devattr,
>> -			      const char *buf, size_t count)
>> +static int adt7470_temp_write(struct device *dev, u32 attr, int channel, long val)
>>   {
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>>   	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>> -	long temp;
>> +	int err;
>>   
>> -	if (kstrtol(buf, 10, &temp))
>> -		return -EINVAL;
>> +	val = clamp_val(val, -128000, 127000);
>> +	val = DIV_ROUND_CLOSEST(val, 1000);
>>   
>> -	temp = clamp_val(temp, -128000, 127000);
>> -	temp = DIV_ROUND_CLOSEST(temp, 1000);
>> +	switch (attr) {
>> +	case hwmon_temp_min:
>> +		mutex_lock(&data->lock);
>> +		data->temp_min[channel] = val;
>> +		err = regmap_write(data->regmap, ADT7470_TEMP_MIN_REG(channel), val);
>> +		mutex_unlock(&data->lock);
>> +		break;
>> +	case hwmon_temp_max:
>> +		mutex_lock(&data->lock);
>> +		data->temp_max[channel] = val;
>> +		err = regmap_write(data->regmap, ADT7470_TEMP_MAX_REG(channel), val);
>> +		mutex_unlock(&data->lock);
>> +		break;
>> +	default:
>> +		return -EOPNOTSUPP;
>> +	}
>>   
>> -	mutex_lock(&data->lock);
>> -	data->temp_min[attr->index] = temp;
>> -	i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
>> -				  temp);
>> -	mutex_unlock(&data->lock);
>> -
>> -	return count;
>> -}
>> -
>> -static ssize_t temp_max_show(struct device *dev,
>> -			     struct device_attribute *devattr, char *buf)
>> -{
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>> -	struct adt7470_data *data = adt7470_update_device(dev);
>> -
>> -	if (IS_ERR(data))
>> -		return PTR_ERR(data);
>> -
>> -	return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
>> -}
>> -
>> -static ssize_t temp_max_store(struct device *dev,
>> -			      struct device_attribute *devattr,
>> -			      const char *buf, size_t count)
>> -{
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>> -	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>> -	long temp;
>> -
>> -	if (kstrtol(buf, 10, &temp))
>> -		return -EINVAL;
>> -
>> -	temp = clamp_val(temp, -128000, 127000);
>> -	temp = DIV_ROUND_CLOSEST(temp, 1000);
>> -
>> -	mutex_lock(&data->lock);
>> -	data->temp_max[attr->index] = temp;
>> -	i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
>> -				  temp);
>> -	mutex_unlock(&data->lock);
>> -
>> -	return count;
>> -}
>> -
>> -static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
>> -			 char *buf)
>> -{
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>> -	struct adt7470_data *data = adt7470_update_device(dev);
>> -
>> -	if (IS_ERR(data))
>> -		return PTR_ERR(data);
>> -
>> -	return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
>> +	return err;
>>   }
>>   
>>   static ssize_t alarm_mask_show(struct device *dev,
>>   			   struct device_attribute *devattr,
>>   			   char *buf)
>>   {
>> -	struct adt7470_data *data = adt7470_update_device(dev);
>> -
>> -	if (IS_ERR(data))
>> -		return PTR_ERR(data);
>> +	struct adt7470_data *data = dev_get_drvdata(dev);
>>   
>>   	return sprintf(buf, "%x\n", data->alarms_mask);
>>   }
>> @@ -574,6 +592,7 @@ static ssize_t alarm_mask_store(struct device *dev,
>>   {
>>   	struct adt7470_data *data = dev_get_drvdata(dev);
>>   	long mask;
>> +	int err;
>>   
>>   	if (kstrtoul(buf, 0, &mask))
>>   		return -EINVAL;
>> @@ -583,113 +602,80 @@ static ssize_t alarm_mask_store(struct device *dev,
>>   
>>   	mutex_lock(&data->lock);
>>   	data->alarms_mask = mask;
>> -	adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask);
>> +	err = adt7470_write_word_data(data, ADT7470_REG_ALARM1_MASK, mask);
>>   	mutex_unlock(&data->lock);
>>   
>> -	return count;
>> +	return err < 0 ? err : count;
>>   }
>>   
>> -static ssize_t fan_max_show(struct device *dev,
>> -			    struct device_attribute *devattr, char *buf)
>> +static int adt7470_fan_read(struct device *dev, u32 attr, int channel, long *val)
>>   {
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>>   	struct adt7470_data *data = adt7470_update_device(dev);
>>   
>>   	if (IS_ERR(data))
>>   		return PTR_ERR(data);
>>   
>> -	if (FAN_DATA_VALID(data->fan_max[attr->index]))
>> -		return sprintf(buf, "%d\n",
>> -			       FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
>> -	else
>> -		return sprintf(buf, "0\n");
>> +	switch (attr) {
>> +	case hwmon_fan_input:
>> +		if (FAN_DATA_VALID(data->fan[channel]))
>> +			*val = FAN_PERIOD_TO_RPM(data->fan[channel]);
>> +		else
>> +			*val = 0;
>> +		break;
>> +	case hwmon_fan_min:
>> +		if (FAN_DATA_VALID(data->fan_min[channel]))
>> +			*val = FAN_PERIOD_TO_RPM(data->fan_min[channel]);
>> +		else
>> +			*val = 0;
>> +		break;
>> +	case hwmon_fan_max:
>> +		if (FAN_DATA_VALID(data->fan_max[channel]))
>> +			*val = FAN_PERIOD_TO_RPM(data->fan_max[channel]);
>> +		else
>> +			*val = 0;
>> +		break;
>> +	case hwmon_fan_alarm:
>> +		*val = !!(data->alarm & (1 << (12 + channel)));
>> +		break;
>> +	default:
>> +		return -EOPNOTSUPP;
>> +	}
>> +
>> +	return 0;
>>   }
>>   
>> -static ssize_t fan_max_store(struct device *dev,
>> -			     struct device_attribute *devattr,
>> -			     const char *buf, size_t count)
>> +static int adt7470_fan_write(struct device *dev, u32 attr, int channel, long val)
>>   {
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>>   	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>> -	long temp;
>> +	int err;
>>   
>> -	if (kstrtol(buf, 10, &temp) || !temp)
>> -		return -EINVAL;
>> +	val = FAN_RPM_TO_PERIOD(val);
>> +	val = clamp_val(val, 1, 65534);
>>   
>> -	temp = FAN_RPM_TO_PERIOD(temp);
>> -	temp = clamp_val(temp, 1, 65534);
>> +	switch (attr) {
>> +	case hwmon_fan_min:
>> +		mutex_lock(&data->lock);
>> +		data->fan_min[channel] = val;
>> +		err = adt7470_write_word_data(data, ADT7470_REG_FAN_MIN(channel), val);
>> +		mutex_unlock(&data->lock);
>> +		break;
>> +	case hwmon_fan_max:
>> +		mutex_lock(&data->lock);
>> +		data->fan_max[channel] = val;
>> +		err = adt7470_write_word_data(data, ADT7470_REG_FAN_MAX(channel), val);
>> +		mutex_unlock(&data->lock);
>> +		break;
>> +	default:
>> +		return -EOPNOTSUPP;
>> +	}
>>   
>> -	mutex_lock(&data->lock);
>> -	data->fan_max[attr->index] = temp;
>> -	adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
>> -	mutex_unlock(&data->lock);
>> -
>> -	return count;
>> -}
>> -
>> -static ssize_t fan_min_show(struct device *dev,
>> -			    struct device_attribute *devattr, char *buf)
>> -{
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>> -	struct adt7470_data *data = adt7470_update_device(dev);
>> -
>> -	if (IS_ERR(data))
>> -		return PTR_ERR(data);
>> -
>> -	if (FAN_DATA_VALID(data->fan_min[attr->index]))
>> -		return sprintf(buf, "%d\n",
>> -			       FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
>> -	else
>> -		return sprintf(buf, "0\n");
>> -}
>> -
>> -static ssize_t fan_min_store(struct device *dev,
>> -			     struct device_attribute *devattr,
>> -			     const char *buf, size_t count)
>> -{
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>> -	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>> -	long temp;
>> -
>> -	if (kstrtol(buf, 10, &temp) || !temp)
>> -		return -EINVAL;
>> -
>> -	temp = FAN_RPM_TO_PERIOD(temp);
>> -	temp = clamp_val(temp, 1, 65534);
>> -
>> -	mutex_lock(&data->lock);
>> -	data->fan_min[attr->index] = temp;
>> -	adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
>> -	mutex_unlock(&data->lock);
>> -
>> -	return count;
>> -}
>> -
>> -static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
>> -			char *buf)
>> -{
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>> -	struct adt7470_data *data = adt7470_update_device(dev);
>> -
>> -	if (IS_ERR(data))
>> -		return PTR_ERR(data);
>> -
>> -	if (FAN_DATA_VALID(data->fan[attr->index]))
>> -		return sprintf(buf, "%d\n",
>> -			       FAN_PERIOD_TO_RPM(data->fan[attr->index]));
>> -	else
>> -		return sprintf(buf, "0\n");
>> +	return err;
>>   }
>>   
>>   static ssize_t force_pwm_max_show(struct device *dev,
>>   				  struct device_attribute *devattr, char *buf)
>>   {
>> -	struct adt7470_data *data = adt7470_update_device(dev);
>> -
>> -	if (IS_ERR(data))
>> -		return PTR_ERR(data);
>> +	struct adt7470_data *data = dev_get_drvdata(dev);
>>   
>>   	return sprintf(buf, "%d\n", data->force_pwm_max);
>>   }
>> @@ -699,57 +685,20 @@ static ssize_t force_pwm_max_store(struct device *dev,
>>   				   const char *buf, size_t count)
>>   {
>>   	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>>   	long temp;
>> -	u8 reg;
>> +	int err;
>>   
>>   	if (kstrtol(buf, 10, &temp))
>>   		return -EINVAL;
>>   
>>   	mutex_lock(&data->lock);
>>   	data->force_pwm_max = temp;
>> -	reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
>> -	if (temp)
>> -		reg |= ADT7470_FSPD_MASK;
>> -	else
>> -		reg &= ~ADT7470_FSPD_MASK;
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
>> +	err = regmap_update_bits(data->regmap, ADT7470_REG_CFG,
>> +				 ADT7470_FSPD_MASK,
>> +				 temp ? ADT7470_FSPD_MASK : 0);
>>   	mutex_unlock(&data->lock);
>>   
>> -	return count;
>> -}
>> -
>> -static ssize_t pwm_show(struct device *dev, struct device_attribute *devattr,
>> -			char *buf)
>> -{
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>> -	struct adt7470_data *data = adt7470_update_device(dev);
>> -
>> -	if (IS_ERR(data))
>> -		return PTR_ERR(data);
>> -
>> -	return sprintf(buf, "%d\n", data->pwm[attr->index]);
>> -}
>> -
>> -static ssize_t pwm_store(struct device *dev, struct device_attribute *devattr,
>> -			 const char *buf, size_t count)
>> -{
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>> -	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>> -	long temp;
>> -
>> -	if (kstrtol(buf, 10, &temp))
>> -		return -EINVAL;
>> -
>> -	temp = clamp_val(temp, 0, 255);
>> -
>> -	mutex_lock(&data->lock);
>> -	data->pwm[attr->index] = temp;
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
>> -	mutex_unlock(&data->lock);
>> -
>> -	return count;
>> +	return err < 0 ? err : count;
>>   }
>>   
>>   /* These are the valid PWM frequencies to the nearest Hz */
>> @@ -757,17 +706,20 @@ static const int adt7470_freq_map[] = {
>>   	11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500
>>   };
>>   
>> -static ssize_t pwm1_freq_show(struct device *dev,
>> -			      struct device_attribute *devattr, char *buf)
>> +static int pwm1_freq_get(struct device *dev)
>>   {
>> -	struct adt7470_data *data = adt7470_update_device(dev);
>> -	unsigned char cfg_reg_1;
>> -	unsigned char cfg_reg_2;
>> +	struct adt7470_data *data = dev_get_drvdata(dev);
>> +	unsigned int cfg_reg_1, cfg_reg_2;
>>   	int index;
>> +	int err;
>>   
>>   	mutex_lock(&data->lock);
>> -	cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG);
>> -	cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2);
>> +	err = regmap_read(data->regmap, ADT7470_REG_CFG, &cfg_reg_1);
>> +	if (err < 0)
>> +		goto out;
>> +	err = regmap_read(data->regmap, ADT7470_REG_CFG_2, &cfg_reg_2);
>> +	if (err < 0)
>> +		goto out;
>>   	mutex_unlock(&data->lock);
>>   
>>   	index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT;
>> @@ -776,22 +728,43 @@ static ssize_t pwm1_freq_show(struct device *dev,
>>   	if (index >= ARRAY_SIZE(adt7470_freq_map))
>>   		index = ARRAY_SIZE(adt7470_freq_map) - 1;
>>   
>> -	return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]);
>> +	return adt7470_freq_map[index];
>> +
>> +out:
>> +	mutex_unlock(&data->lock);
>> +	return err;
>>   }
>>   
>> -static ssize_t pwm1_freq_store(struct device *dev,
>> -			       struct device_attribute *devattr,
>> -			       const char *buf, size_t count)
>> +static int adt7470_pwm_read(struct device *dev, u32 attr, int channel, long *val)
>> +{
>> +	struct adt7470_data *data = adt7470_update_device(dev);
>> +
>> +	if (IS_ERR(data))
>> +		return PTR_ERR(data);
>> +
>> +	switch (attr) {
>> +	case hwmon_pwm_input:
>> +		*val = data->pwm[channel];
>> +		break;
>> +	case hwmon_pwm_enable:
>> +		*val = 1 + data->pwm_automatic[channel];
>> +		break;
>> +	case hwmon_pwm_freq:
>> +		*val = pwm1_freq_get(dev);
>> +		break;
>> +	default:
>> +		return -EOPNOTSUPP;
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static int pwm1_freq_set(struct device *dev, long freq)
>>   {
>>   	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>> -	long freq;
>> +	unsigned int low_freq = ADT7470_CFG_LF;
>>   	int index;
>> -	int low_freq = ADT7470_CFG_LF;
>> -	unsigned char val;
>> -
>> -	if (kstrtol(buf, 10, &freq))
>> -		return -EINVAL;
>> +	int err;
>>   
>>   	/* Round the user value given to the closest available frequency */
>>   	index = find_closest(freq, adt7470_freq_map,
>> @@ -804,16 +777,62 @@ static ssize_t pwm1_freq_store(struct device *dev,
>>   
>>   	mutex_lock(&data->lock);
>>   	/* Configuration Register 1 */
>> -	val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_CFG,
>> -				  (val & ~ADT7470_CFG_LF) | low_freq);
>> +	err = regmap_update_bits(data->regmap, ADT7470_REG_CFG,
>> +				 ADT7470_CFG_LF, low_freq);
>> +	if (err < 0)
>> +		goto out;
>> +
>>   	/* Configuration Register 2 */
>> -	val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2);
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2,
>> -		(val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT));
>> +	err = regmap_update_bits(data->regmap, ADT7470_REG_CFG_2,
>> +				 ADT7470_FREQ_MASK,
>> +				 index << ADT7470_FREQ_SHIFT);
>> +out:
>>   	mutex_unlock(&data->lock);
>>   
>> -	return count;
>> +	return err;
>> +}
>> +
>> +static int adt7470_pwm_write(struct device *dev, u32 attr, int channel, long val)
>> +{
>> +	struct adt7470_data *data = dev_get_drvdata(dev);
>> +	unsigned int pwm_auto_reg_mask;
>> +	int err;
>> +
>> +	switch (attr) {
>> +	case hwmon_pwm_input:
>> +		val = clamp_val(val, 0, 255);
>> +		mutex_lock(&data->lock);
>> +		data->pwm[channel] = val;
>> +		err = regmap_write(data->regmap, ADT7470_REG_PWM(channel),
>> +				   data->pwm[channel]);
>> +		mutex_unlock(&data->lock);
>> +		break;
>> +	case hwmon_pwm_enable:
>> +		if (channel % 2)
>> +			pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
>> +		else
>> +			pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
>> +
>> +		if (val != 2 && val != 1)
>> +			return -EINVAL;
>> +		val--;
>> +
>> +		mutex_lock(&data->lock);
>> +		data->pwm_automatic[channel] = val;
>> +		err = regmap_update_bits(data->regmap, ADT7470_REG_PWM_CFG(channel),
>> +				pwm_auto_reg_mask,
>> +				val ? pwm_auto_reg_mask : 0);
>> +		mutex_unlock(&data->lock);
>> +		break;
>> +	case hwmon_pwm_freq:
>> +		err = pwm1_freq_set(dev, val);
>> +		break;
>> +	default:
>> +		return -EOPNOTSUPP;
>> +	}
>> +
>> +	return err;
>> +
>>   }
>>   
>>   static ssize_t pwm_max_show(struct device *dev,
>> @@ -834,8 +853,8 @@ static ssize_t pwm_max_store(struct device *dev,
>>   {
>>   	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>>   	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>>   	long temp;
>> +	int err;
>>   
>>   	if (kstrtol(buf, 10, &temp))
>>   		return -EINVAL;
>> @@ -844,11 +863,11 @@ static ssize_t pwm_max_store(struct device *dev,
>>   
>>   	mutex_lock(&data->lock);
>>   	data->pwm_max[attr->index] = temp;
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
>> -				  temp);
>> +	err = regmap_write(data->regmap, ADT7470_REG_PWM_MAX(attr->index),
>> +			   temp);
>>   	mutex_unlock(&data->lock);
>>   
>> -	return count;
>> +	return err < 0 ? err : count;
>>   }
>>   
>>   static ssize_t pwm_min_show(struct device *dev,
>> @@ -869,8 +888,8 @@ static ssize_t pwm_min_store(struct device *dev,
>>   {
>>   	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>>   	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>>   	long temp;
>> +	int err;
>>   
>>   	if (kstrtol(buf, 10, &temp))
>>   		return -EINVAL;
>> @@ -879,11 +898,11 @@ static ssize_t pwm_min_store(struct device *dev,
>>   
>>   	mutex_lock(&data->lock);
>>   	data->pwm_min[attr->index] = temp;
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
>> -				  temp);
>> +	err = regmap_write(data->regmap, ADT7470_REG_PWM_MIN(attr->index),
>> +			   temp);
>>   	mutex_unlock(&data->lock);
>>   
>> -	return count;
>> +	return err < 0 ? err : count;
>>   }
>>   
>>   static ssize_t pwm_tmax_show(struct device *dev,
>> @@ -917,8 +936,8 @@ static ssize_t pwm_tmin_store(struct device *dev,
>>   {
>>   	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>>   	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>>   	long temp;
>> +	int err;
>>   
>>   	if (kstrtol(buf, 10, &temp))
>>   		return -EINVAL;
>> @@ -928,60 +947,11 @@ static ssize_t pwm_tmin_store(struct device *dev,
>>   
>>   	mutex_lock(&data->lock);
>>   	data->pwm_tmin[attr->index] = temp;
>> -	i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
>> -				  temp);
>> +	err = regmap_write(data->regmap, ADT7470_REG_PWM_TMIN(attr->index),
>> +			   temp);
>>   	mutex_unlock(&data->lock);
>>   
>> -	return count;
>> -}
>> -
>> -static ssize_t pwm_auto_show(struct device *dev,
>> -			     struct device_attribute *devattr, char *buf)
>> -{
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>> -	struct adt7470_data *data = adt7470_update_device(dev);
>> -
>> -	if (IS_ERR(data))
>> -		return PTR_ERR(data);
>> -
>> -	return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
>> -}
>> -
>> -static ssize_t pwm_auto_store(struct device *dev,
>> -			      struct device_attribute *devattr,
>> -			      const char *buf, size_t count)
>> -{
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>> -	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>> -	int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
>> -	int pwm_auto_reg_mask;
>> -	long temp;
>> -	u8 reg;
>> -
>> -	if (kstrtol(buf, 10, &temp))
>> -		return -EINVAL;
>> -
>> -	if (attr->index % 2)
>> -		pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
>> -	else
>> -		pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
>> -
>> -	if (temp != 2 && temp != 1)
>> -		return -EINVAL;
>> -	temp--;
>> -
>> -	mutex_lock(&data->lock);
>> -	data->pwm_automatic[attr->index] = temp;
>> -	reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
>> -	if (temp)
>> -		reg |= pwm_auto_reg_mask;
>> -	else
>> -		reg &= ~pwm_auto_reg_mask;
>> -	i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
>> -	mutex_unlock(&data->lock);
>> -
>> -	return count;
>> +	return err < 0 ? err : count;
>>   }
>>   
>>   static ssize_t pwm_auto_temp_show(struct device *dev,
>> @@ -1016,10 +986,10 @@ static ssize_t pwm_auto_temp_store(struct device *dev,
>>   {
>>   	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>>   	struct adt7470_data *data = dev_get_drvdata(dev);
>> -	struct i2c_client *client = data->client;
>>   	int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
>> +	unsigned int mask, val;
>>   	long temp;
>> -	u8 reg;
>> +	int err;
>>   
>>   	if (kstrtol(buf, 10, &temp))
>>   		return -EINVAL;
>> @@ -1030,111 +1000,27 @@ static ssize_t pwm_auto_temp_store(struct device *dev,
>>   
>>   	mutex_lock(&data->lock);
>>   	data->pwm_automatic[attr->index] = temp;
>> -	reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
>>   
>>   	if (!(attr->index % 2)) {
>> -		reg &= 0xF;
>> -		reg |= (temp << 4) & 0xF0;
>> +		mask = 0xF0;
>> +		val = (temp << 4) & 0xF0;
>>   	} else {
>> -		reg &= 0xF0;
>> -		reg |= temp & 0xF;
>> +		mask = 0x0F;
>> +		val = temp & 0x0F;
>>   	}
>>   
>> -	i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
>> +	err = regmap_update_bits(data->regmap, pwm_auto_reg, mask, val);
>>   	mutex_unlock(&data->lock);
>>   
>> -	return count;
>> -}
>> -
>> -static ssize_t alarm_show(struct device *dev,
>> -			  struct device_attribute *devattr, char *buf)
>> -{
>> -	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
>> -	struct adt7470_data *data = adt7470_update_device(dev);
>> -
>> -	if (data->alarm & attr->index)
>> -		return sprintf(buf, "1\n");
>> -	else
>> -		return sprintf(buf, "0\n");
>> +	return err < 0 ? err : count;
>>   }
>>   
>>   static DEVICE_ATTR_RW(alarm_mask);
>>   static DEVICE_ATTR_RW(num_temp_sensors);
>>   static DEVICE_ATTR_RW(auto_update_interval);
>>   
>> -static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
>> -static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
>> -static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
>> -static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
>> -static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);
>> -static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);
>> -static SENSOR_DEVICE_ATTR_RW(temp7_max, temp_max, 6);
>> -static SENSOR_DEVICE_ATTR_RW(temp8_max, temp_max, 7);
>> -static SENSOR_DEVICE_ATTR_RW(temp9_max, temp_max, 8);
>> -static SENSOR_DEVICE_ATTR_RW(temp10_max, temp_max, 9);
>> -
>> -static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
>> -static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
>> -static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2);
>> -static SENSOR_DEVICE_ATTR_RW(temp4_min, temp_min, 3);
>> -static SENSOR_DEVICE_ATTR_RW(temp5_min, temp_min, 4);
>> -static SENSOR_DEVICE_ATTR_RW(temp6_min, temp_min, 5);
>> -static SENSOR_DEVICE_ATTR_RW(temp7_min, temp_min, 6);
>> -static SENSOR_DEVICE_ATTR_RW(temp8_min, temp_min, 7);
>> -static SENSOR_DEVICE_ATTR_RW(temp9_min, temp_min, 8);
>> -static SENSOR_DEVICE_ATTR_RW(temp10_min, temp_min, 9);
>> -
>> -static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
>> -static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
>> -static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
>> -static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
>> -static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
>> -static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
>> -static SENSOR_DEVICE_ATTR_RO(temp7_input, temp, 6);
>> -static SENSOR_DEVICE_ATTR_RO(temp8_input, temp, 7);
>> -static SENSOR_DEVICE_ATTR_RO(temp9_input, temp, 8);
>> -static SENSOR_DEVICE_ATTR_RO(temp10_input, temp, 9);
>> -
>> -static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, ADT7470_R1T_ALARM);
>> -static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, ADT7470_R2T_ALARM);
>> -static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, ADT7470_R3T_ALARM);
>> -static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, ADT7470_R4T_ALARM);
>> -static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, ADT7470_R5T_ALARM);
>> -static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, ADT7470_R6T_ALARM);
>> -static SENSOR_DEVICE_ATTR_RO(temp7_alarm, alarm, ADT7470_R7T_ALARM);
>> -static SENSOR_DEVICE_ATTR_RO(temp8_alarm, alarm, ALARM2(ADT7470_R8T_ALARM));
>> -static SENSOR_DEVICE_ATTR_RO(temp9_alarm, alarm, ALARM2(ADT7470_R9T_ALARM));
>> -static SENSOR_DEVICE_ATTR_RO(temp10_alarm, alarm, ALARM2(ADT7470_R10T_ALARM));
>> -
>> -static SENSOR_DEVICE_ATTR_RW(fan1_max, fan_max, 0);
>> -static SENSOR_DEVICE_ATTR_RW(fan2_max, fan_max, 1);
>> -static SENSOR_DEVICE_ATTR_RW(fan3_max, fan_max, 2);
>> -static SENSOR_DEVICE_ATTR_RW(fan4_max, fan_max, 3);
>> -
>> -static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
>> -static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
>> -static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
>> -static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);
>> -
>> -static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
>> -static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
>> -static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
>> -static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
>> -
>> -static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, ALARM2(ADT7470_FAN1_ALARM));
>> -static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, ALARM2(ADT7470_FAN2_ALARM));
>> -static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm, ALARM2(ADT7470_FAN3_ALARM));
>> -static SENSOR_DEVICE_ATTR_RO(fan4_alarm, alarm, ALARM2(ADT7470_FAN4_ALARM));
>> -
>>   static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0);
>>   
>> -static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
>> -static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
>> -static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
>> -static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);
>> -
>> -static DEVICE_ATTR_RW(pwm1_freq);
>> -
>>   static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_min, 0);
>>   static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm_min, 1);
>>   static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm_min, 2);
>> @@ -1155,11 +1041,6 @@ static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point2_temp, pwm_tmax, 1);
>>   static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point2_temp, pwm_tmax, 2);
>>   static SENSOR_DEVICE_ATTR_RO(pwm4_auto_point2_temp, pwm_tmax, 3);
>>   
>> -static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_auto, 0);
>> -static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_auto, 1);
>> -static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_auto, 2);
>> -static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_auto, 3);
>> -
>>   static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels_temp, pwm_auto_temp, 0);
>>   static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels_temp, pwm_auto_temp, 1);
>>   static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels_temp, pwm_auto_temp, 2);
>> @@ -1169,68 +1050,7 @@ static struct attribute *adt7470_attrs[] = {
>>   	&dev_attr_alarm_mask.attr,
>>   	&dev_attr_num_temp_sensors.attr,
>>   	&dev_attr_auto_update_interval.attr,
>> -	&sensor_dev_attr_temp1_max.dev_attr.attr,
>> -	&sensor_dev_attr_temp2_max.dev_attr.attr,
>> -	&sensor_dev_attr_temp3_max.dev_attr.attr,
>> -	&sensor_dev_attr_temp4_max.dev_attr.attr,
>> -	&sensor_dev_attr_temp5_max.dev_attr.attr,
>> -	&sensor_dev_attr_temp6_max.dev_attr.attr,
>> -	&sensor_dev_attr_temp7_max.dev_attr.attr,
>> -	&sensor_dev_attr_temp8_max.dev_attr.attr,
>> -	&sensor_dev_attr_temp9_max.dev_attr.attr,
>> -	&sensor_dev_attr_temp10_max.dev_attr.attr,
>> -	&sensor_dev_attr_temp1_min.dev_attr.attr,
>> -	&sensor_dev_attr_temp2_min.dev_attr.attr,
>> -	&sensor_dev_attr_temp3_min.dev_attr.attr,
>> -	&sensor_dev_attr_temp4_min.dev_attr.attr,
>> -	&sensor_dev_attr_temp5_min.dev_attr.attr,
>> -	&sensor_dev_attr_temp6_min.dev_attr.attr,
>> -	&sensor_dev_attr_temp7_min.dev_attr.attr,
>> -	&sensor_dev_attr_temp8_min.dev_attr.attr,
>> -	&sensor_dev_attr_temp9_min.dev_attr.attr,
>> -	&sensor_dev_attr_temp10_min.dev_attr.attr,
>> -	&sensor_dev_attr_temp1_input.dev_attr.attr,
>> -	&sensor_dev_attr_temp2_input.dev_attr.attr,
>> -	&sensor_dev_attr_temp3_input.dev_attr.attr,
>> -	&sensor_dev_attr_temp4_input.dev_attr.attr,
>> -	&sensor_dev_attr_temp5_input.dev_attr.attr,
>> -	&sensor_dev_attr_temp6_input.dev_attr.attr,
>> -	&sensor_dev_attr_temp7_input.dev_attr.attr,
>> -	&sensor_dev_attr_temp8_input.dev_attr.attr,
>> -	&sensor_dev_attr_temp9_input.dev_attr.attr,
>> -	&sensor_dev_attr_temp10_input.dev_attr.attr,
>> -	&sensor_dev_attr_temp1_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_temp2_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_temp3_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_temp4_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_temp5_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_temp6_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_temp7_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_temp8_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_temp9_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_temp10_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_fan1_max.dev_attr.attr,
>> -	&sensor_dev_attr_fan2_max.dev_attr.attr,
>> -	&sensor_dev_attr_fan3_max.dev_attr.attr,
>> -	&sensor_dev_attr_fan4_max.dev_attr.attr,
>> -	&sensor_dev_attr_fan1_min.dev_attr.attr,
>> -	&sensor_dev_attr_fan2_min.dev_attr.attr,
>> -	&sensor_dev_attr_fan3_min.dev_attr.attr,
>> -	&sensor_dev_attr_fan4_min.dev_attr.attr,
>> -	&sensor_dev_attr_fan1_input.dev_attr.attr,
>> -	&sensor_dev_attr_fan2_input.dev_attr.attr,
>> -	&sensor_dev_attr_fan3_input.dev_attr.attr,
>> -	&sensor_dev_attr_fan4_input.dev_attr.attr,
>> -	&sensor_dev_attr_fan1_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_fan2_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_fan3_alarm.dev_attr.attr,
>> -	&sensor_dev_attr_fan4_alarm.dev_attr.attr,
>>   	&sensor_dev_attr_force_pwm_max.dev_attr.attr,
>> -	&sensor_dev_attr_pwm1.dev_attr.attr,
>> -	&dev_attr_pwm1_freq.attr,
>> -	&sensor_dev_attr_pwm2.dev_attr.attr,
>> -	&sensor_dev_attr_pwm3.dev_attr.attr,
>> -	&sensor_dev_attr_pwm4.dev_attr.attr,
>>   	&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
>>   	&sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
>>   	&sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
>> @@ -1247,10 +1067,6 @@ static struct attribute *adt7470_attrs[] = {
>>   	&sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
>>   	&sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
>>   	&sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
>> -	&sensor_dev_attr_pwm1_enable.dev_attr.attr,
>> -	&sensor_dev_attr_pwm2_enable.dev_attr.attr,
>> -	&sensor_dev_attr_pwm3_enable.dev_attr.attr,
>> -	&sensor_dev_attr_pwm4_enable.dev_attr.attr,
>>   	&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
>>   	&sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
>>   	&sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
>> @@ -1260,6 +1076,129 @@ static struct attribute *adt7470_attrs[] = {
>>   
>>   ATTRIBUTE_GROUPS(adt7470);
>>   
>> +static int adt7470_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
>> +			int channel, long *val)
>> +{
>> +	switch (type) {
>> +	case hwmon_temp:
>> +		return adt7470_temp_read(dev, attr, channel, val);
>> +	case hwmon_fan:
>> +		return adt7470_fan_read(dev, attr, channel, val);
>> +	case hwmon_pwm:
>> +		return adt7470_pwm_read(dev, attr, channel, val);
>> +	default:
>> +		return -EOPNOTSUPP;
>> +	}
>> +}
>> +
>> +static int adt7470_write(struct device *dev, enum hwmon_sensor_types type, u32 attr,
>> +			int channel, long val)
>> +{
>> +	switch (type) {
>> +	case hwmon_temp:
>> +		return adt7470_temp_write(dev, attr, channel, val);
>> +	case hwmon_fan:
>> +		return adt7470_fan_write(dev, attr, channel, val);
>> +	case hwmon_pwm:
>> +		return adt7470_pwm_write(dev, attr, channel, val);
>> +	default:
>> +		return -EOPNOTSUPP;
>> +	}
>> +}
>> +
>> +static umode_t adt7470_is_visible(const void *_data, enum hwmon_sensor_types type,
>> +				  u32 attr, int channel)
>> +{
>> +	umode_t mode = 0;
>> +
>> +	switch (type) {
>> +	case hwmon_temp:
>> +		switch (attr) {
>> +		case hwmon_temp:
>> +		case hwmon_temp_alarm:
>> +			mode = 0444;
>> +			break;
>> +		case hwmon_temp_min:
>> +		case hwmon_temp_max:
>> +			mode = 0644;
>> +			break;
>> +		default:
>> +			break;
>> +		}
>> +		break;
>> +	case hwmon_fan:
>> +		switch (attr) {
>> +		case hwmon_fan_input:
>> +		case hwmon_fan_alarm:
>> +			mode = 0444;
>> +			break;
>> +		case hwmon_fan_min:
>> +		case hwmon_fan_max:
>> +			mode = 0644;
>> +			break;
>> +		default:
>> +			break;
>> +		}
>> +		break;
>> +	case hwmon_pwm:
>> +		switch (attr) {
>> +		case hwmon_pwm_input:
>> +		case hwmon_pwm_enable:
>> +			mode = 0644;
>> +			break;
>> +		case hwmon_pwm_freq:
>> +			if (channel == 0)
>> +				mode = 0644;
>> +			else
>> +				mode = 0;
>> +			break;
>> +		default:
>> +			break;
>> +		}
>> +		break;
>> +	default:
>> +		break;
>> +	}
>> +
>> +	return mode;
>> +}
>> +
>> +static const struct hwmon_ops adt7470_hwmon_ops = {
>> +	.is_visible = adt7470_is_visible,
>> +	.read = adt7470_read,
>> +	.write = adt7470_write,
>> +};
>> +
>> +static const struct hwmon_channel_info *adt7470_info[] = {
>> +	HWMON_CHANNEL_INFO(temp,
>> +			HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
>> +			HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
>> +			HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
>> +			HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
>> +			HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
>> +			HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
>> +			HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
>> +			HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
>> +			HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM,
>> +			HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX | HWMON_T_ALARM),
>> +	HWMON_CHANNEL_INFO(fan,
>> +			HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM,
>> +			HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM,
>> +			HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM,
>> +			HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_MAX | HWMON_F_DIV | HWMON_F_ALARM),
>> +	HWMON_CHANNEL_INFO(pwm,
>> +			HWMON_PWM_INPUT | HWMON_PWM_ENABLE | HWMON_PWM_FREQ,
>> +			HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
>> +			HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
>> +			HWMON_PWM_INPUT | HWMON_PWM_ENABLE),
>> +	NULL
>> +};
>> +
>> +static const struct hwmon_chip_info adt7470_chip_info = {
>> +	.ops = &adt7470_hwmon_ops,
>> +	.info = adt7470_info,
>> +};
>> +
>>   /* Return 0 if detection is successful, -ENODEV otherwise */
>>   static int adt7470_detect(struct i2c_client *client,
>>   			  struct i2c_board_info *info)
>> @@ -1287,23 +1226,19 @@ static int adt7470_detect(struct i2c_client *client,
>>   	return 0;
>>   }
>>   
>> -static void adt7470_init_client(struct i2c_client *client)
>> -{
>> -	int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
>> -
>> -	if (reg < 0) {
>> -		dev_err(&client->dev, "cannot read configuration register\n");
>> -	} else {
>> -		/* start monitoring (and do a self-test) */
>> -		i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
>> -	}
>> -}
>> +static const struct regmap_config adt7470_regmap_config = {
>> +	.reg_bits = 8,
>> +	.val_bits = 8,
>> +	.use_single_read = true,
>> +	.use_single_write = true,
>> +};
>>   
>>   static int adt7470_probe(struct i2c_client *client)
>>   {
>>   	struct device *dev = &client->dev;
>>   	struct adt7470_data *data;
>>   	struct device *hwmon_dev;
>> +	int err;
>>   
>>   	data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
>>   	if (!data)
>> @@ -1311,29 +1246,34 @@ static int adt7470_probe(struct i2c_client *client)
>>   
>>   	data->num_temp_sensors = -1;
>>   	data->auto_update_interval = AUTO_UPDATE_INTERVAL;
>> +	data->regmap = devm_regmap_init_i2c(client, &adt7470_regmap_config);
>> +	if (IS_ERR(data->regmap))
>> +		return PTR_ERR(data->regmap);
>>   
>>   	i2c_set_clientdata(client, data);
>> -	data->client = client;
>>   	mutex_init(&data->lock);
>>   
>>   	dev_info(&client->dev, "%s chip found\n", client->name);
>>   
>>   	/* Initialize the ADT7470 chip */
>> -	adt7470_init_client(client);
>> +	err = regmap_update_bits(data->regmap, ADT7470_REG_CFG,
>> +				 ADT7470_STRT_MASK | ADT7470_TEST_MASK,
>> +				 ADT7470_STRT_MASK | ADT7470_TEST_MASK);
>> +	if (err < 0)
>> +		return err;
>>   
>>   	/* Register sysfs hooks */
>> -	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
>> -							   data,
>> -							   adt7470_groups);
>> +	hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, data,
>> +							 &adt7470_chip_info,
>> +							 adt7470_groups);
>>   
>>   	if (IS_ERR(hwmon_dev))
>>   		return PTR_ERR(hwmon_dev);
>>   
>>   	data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
>>   					dev_name(hwmon_dev));
>> -	if (IS_ERR(data->auto_update)) {
>> +	if (IS_ERR(data->auto_update))
>>   		return PTR_ERR(data->auto_update);
>> -	}
>>   
>>   	return 0;
>>   }

  reply	other threads:[~2021-08-24 21:15 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-23  0:20 [PATCH 0/2] hwmon: (adt7470) Clean up Chris Packham
2021-06-23  0:20 ` [PATCH 1/2] hwmon: (adt7470) Convert to devm_hwmon_device_register_with_info API Chris Packham
2021-08-24 21:07   ` Guenter Roeck
2021-08-24 21:15     ` Chris Packham [this message]
2021-06-23  0:20 ` [PATCH 2/2] hwmon: (adt7470) Use standard update_interval property Chris Packham

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