[PATCH v4 0/2] hwmon: Add support for W83667HG-B to w83627ehf driver.

[PATCH v4 0/2] hwmon: Add support for W83667HG-B to w83627ehf driver.

[Guenter Roeck]

The following patch series adds support for W83667HG-B to the w83627ehf driver.

The first patch makes generic changes to the driver, the second patch adds
support for W83667HG-B.

Key relevant difference between W83667HG and W83667HG-B are the Chip ID as well
as fan output and step output register addresses. Those differences are
addressed with this patch.

There are other relevant changes in the mapping of input sensors to fan
control (W83667HG datasheet chapter 8.7, W83667HG-B datasheet chapter 8.5).
However, control of those mappings is not implemented in the driver, thus the
respective changes should not have an impact on driver operation.

Patch has been tested with W83667HG-B on Asus P7F-E board. Fan and voltage
sensors are known to work. pwmcontrol does not have a noticeable effect,
though the reasons are unknown and might be board related.

Changes in v4: 
- Fixed error message "sysfs: cannot create duplicate filename".
- Split patch into generic and W83667HG-B specific parts.

Changes in v3:
- Updated driver documentation
- Read data from max and step registers in update_device function.
- In update_device, read fan pwm registers only for installed/supported fans.
- Removed W83667HG-I code; that should really have been W83677HG-I.
  Without datasheet, adding support for this chip would be too risky.
- For W83667HG-B, create max and step attribute files for all fans.

Changes in v2:
- Removed dash from hwmon device name.
- Moved global array pointers to per-device data.
- Added chip detection for W83667HG-I
  (assumed to be identical to W83667HG; needs to be validated).

[PATCH v4 1/2] hwmon: w83627ehf driver cleanup

[Guenter Roeck]

- Moved fan pwm register array pointers into per-instance data.
- Only read fan pwm data for installed/supported fans.
- Update fan max output and fan step output information from data in registers.
- Create max_output and step_output attribute files only if respective
  fan pwm registers exist.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
---
 drivers/hwmon/w83627ehf.c |   59 ++++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 56 insertions(+), 3 deletions(-)

diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index 0dcaba9..e01a3e9 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -277,6 +277,11 @@ struct w83627ehf_data {
 	struct device *hwmon_dev;
 	struct mutex lock;
 
+	const u8 *REG_FAN_START_OUTPUT;
+	const u8 *REG_FAN_STOP_OUTPUT;
+	const u8 *REG_FAN_MAX_OUTPUT;
+	const u8 *REG_FAN_STEP_OUTPUT;
+
 	struct mutex update_lock;
 	char valid;		/* !=0 if following fields are valid */
 	unsigned long last_updated;	/* In jiffies */
@@ -524,7 +529,10 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
 			}
 		}
 
-		for (i = 0; i < 4; i++) {
+		for (i = 0; i < data->pwm_num; i++) {
+			if (!(data->has_fan & (1 << i)))
+				continue;
+
 			/* pwmcfg, tolerance mapped for i=0, i=1 to same reg */
 			if (i != 1) {
 				pwmcfg = w83627ehf_read_value(data,
@@ -546,6 +554,17 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
 						W83627EHF_REG_FAN_STOP_OUTPUT[i]);
 			data->fan_stop_time[i] = w83627ehf_read_value(data,
 						W83627EHF_REG_FAN_STOP_TIME[i]);
+
+			if (data->REG_FAN_MAX_OUTPUT[i] != 0xff)
+				data->fan_max_output[i] =
+				  w83627ehf_read_value(data,
+					       data->REG_FAN_MAX_OUTPUT[i]);
+
+			if (data->REG_FAN_STEP_OUTPUT[i] != 0xff)
+				data->fan_step_output[i] =
+				  w83627ehf_read_value(data,
+					       data->REG_FAN_STEP_OUTPUT[i]);
+
 			data->target_temp[i] =
 				w83627ehf_read_value(data,
 					W83627EHF_REG_TARGET[i]) &
@@ -1126,7 +1145,7 @@ store_##reg(struct device *dev, struct device_attribute *attr, \
 	u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 1, 255); \
 	mutex_lock(&data->update_lock); \
 	data->reg[nr] = val; \
-	w83627ehf_write_value(data, W83627EHF_REG_##REG[nr], val); \
+	w83627ehf_write_value(data, data->REG_##REG[nr], val); \
 	mutex_unlock(&data->update_lock); \
 	return count; \
 }
@@ -1206,12 +1225,26 @@ static struct sensor_device_attribute sda_sf3_arrays[] = {
 		    store_fan_stop_output, 1),
 	SENSOR_ATTR(pwm3_stop_output, S_IWUSR | S_IRUGO, show_fan_stop_output,
 		    store_fan_stop_output, 2),
+};
 
-	/* pwm1 and pwm3 don't support max and step settings */
+
+/*
+ * pwm1 and pwm3 don't support max and step settings on all chips.
+ * Need to check support while generating/removing attribute files.
+ */
+static struct sensor_device_attribute sda_sf3_max_step_arrays[] = {
+	SENSOR_ATTR(pwm1_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
+		    store_fan_max_output, 0),
+	SENSOR_ATTR(pwm1_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
+		    store_fan_step_output, 0),
 	SENSOR_ATTR(pwm2_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
 		    store_fan_max_output, 1),
 	SENSOR_ATTR(pwm2_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
 		    store_fan_step_output, 1),
+	SENSOR_ATTR(pwm3_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
+		    store_fan_max_output, 2),
+	SENSOR_ATTR(pwm3_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
+		    store_fan_step_output, 2),
 };
 
 static ssize_t
@@ -1235,6 +1268,12 @@ static void w83627ehf_device_remove_files(struct device *dev)
 
 	for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays); i++)
 		device_remove_file(dev, &sda_sf3_arrays[i].dev_attr);
+	for (i = 0; i < ARRAY_SIZE(sda_sf3_max_step_arrays); i++) {
+		struct sensor_device_attribute *attr =
+		  &sda_sf3_max_step_arrays[i];
+		if (data->REG_FAN_STEP_OUTPUT[attr->index] != 0xff)
+			device_remove_file(dev, &attr->dev_attr);
+	}
 	for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++)
 		device_remove_file(dev, &sda_sf3_arrays_fan4[i].dev_attr);
 	for (i = 0; i < data->in_num; i++) {
@@ -1352,6 +1391,11 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
 		data->in6_skip = !data->temp3_disable;
 	}
 
+	data->REG_FAN_START_OUTPUT = W83627EHF_REG_FAN_START_OUTPUT;
+	data->REG_FAN_STOP_OUTPUT = W83627EHF_REG_FAN_STOP_OUTPUT;
+	data->REG_FAN_MAX_OUTPUT = W83627EHF_REG_FAN_MAX_OUTPUT;
+	data->REG_FAN_STEP_OUTPUT = W83627EHF_REG_FAN_STEP_OUTPUT;
+
 	/* Initialize the chip */
 	w83627ehf_init_device(data);
 
@@ -1440,6 +1484,15 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
 			&sda_sf3_arrays[i].dev_attr)))
 			goto exit_remove;
 
+	for (i = 0; i < ARRAY_SIZE(sda_sf3_max_step_arrays); i++) {
+		struct sensor_device_attribute *attr =
+		  &sda_sf3_max_step_arrays[i];
+		if (data->REG_FAN_STEP_OUTPUT[attr->index] != 0xff) {
+			err = device_create_file(dev, &attr->dev_attr);
+			if (err)
+				goto exit_remove;
+		}
+	}
 	/* if fan4 is enabled create the sf3 files for it */
 	if ((data->has_fan & (1 << 3)) && data->pwm_num >= 4)
 		for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++) {
-- 
1.7.0.87.g0901d

Re: [PATCH v4 1/2] hwmon: w83627ehf driver cleanup

[Jean Delvare]

Hi Guenter,

On Sat, 3 Jul 2010 15:13:21 -0700, Guenter Roeck wrote:
> - Moved fan pwm register array pointers into per-instance data.
> - Only read fan pwm data for installed/supported fans.
> - Update fan max output and fan step output information from data in registers.
> - Create max_output and step_output attribute files only if respective
>   fan pwm registers exist.
> 
> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
> ---
>  drivers/hwmon/w83627ehf.c |   59 ++++++++++++++++++++++++++++++++++++++++++--
>  1 files changed, 56 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
> index 0dcaba9..e01a3e9 100644
> --- a/drivers/hwmon/w83627ehf.c
> +++ b/drivers/hwmon/w83627ehf.c
> @@ -277,6 +277,11 @@ struct w83627ehf_data {
>  	struct device *hwmon_dev;
>  	struct mutex lock;
>  
> +	const u8 *REG_FAN_START_OUTPUT;
> +	const u8 *REG_FAN_STOP_OUTPUT;
> +	const u8 *REG_FAN_MAX_OUTPUT;
> +	const u8 *REG_FAN_STEP_OUTPUT;
> +
>  	struct mutex update_lock;
>  	char valid;		/* !=0 if following fields are valid */
>  	unsigned long last_updated;	/* In jiffies */
> @@ -524,7 +529,10 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
>  			}
>  		}
>  
> -		for (i = 0; i < 4; i++) {
> +		for (i = 0; i < data->pwm_num; i++) {
> +			if (!(data->has_fan & (1 << i)))
> +				continue;

I'm skeptical. data->has_fan refers to fan inputs, not fan outputs.
There is no guarantee that pwm1 is mapped to fan1, etc., so you can't
use data->has_fan to discard fan outputs.

> +
>  			/* pwmcfg, tolerance mapped for i=0, i=1 to same reg */
>  			if (i != 1) {
>  				pwmcfg = w83627ehf_read_value(data,
> @@ -546,6 +554,17 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
>  						W83627EHF_REG_FAN_STOP_OUTPUT[i]);
>  			data->fan_stop_time[i] = w83627ehf_read_value(data,
>  						W83627EHF_REG_FAN_STOP_TIME[i]);
> +
> +			if (data->REG_FAN_MAX_OUTPUT[i] != 0xff)
> +				data->fan_max_output[i] =
> +				  w83627ehf_read_value(data,
> +					       data->REG_FAN_MAX_OUTPUT[i]);
> +
> +			if (data->REG_FAN_STEP_OUTPUT[i] != 0xff)
> +				data->fan_step_output[i] =
> +				  w83627ehf_read_value(data,
> +					       data->REG_FAN_STEP_OUTPUT[i]);
> +

Huuu, wait a minute, So these values were supposedly exposed to
user-space, but were never read from their respective registers? So
this is a plain bug you're fixing?

Now I'm wondering, how useful is a feature that has been broken forever
and nobody ever complained?

>  			data->target_temp[i] =
>  				w83627ehf_read_value(data,
>  					W83627EHF_REG_TARGET[i]) &
> @@ -1126,7 +1145,7 @@ store_##reg(struct device *dev, struct device_attribute *attr, \
>  	u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 1, 255); \
>  	mutex_lock(&data->update_lock); \
>  	data->reg[nr] = val; \
> -	w83627ehf_write_value(data, W83627EHF_REG_##REG[nr], val); \
> +	w83627ehf_write_value(data, data->REG_##REG[nr], val); \
>  	mutex_unlock(&data->update_lock); \
>  	return count; \
>  }
> @@ -1206,12 +1225,26 @@ static struct sensor_device_attribute sda_sf3_arrays[] = {
>  		    store_fan_stop_output, 1),
>  	SENSOR_ATTR(pwm3_stop_output, S_IWUSR | S_IRUGO, show_fan_stop_output,
>  		    store_fan_stop_output, 2),
> +};
>  
> -	/* pwm1 and pwm3 don't support max and step settings */
> +
> +/*
> + * pwm1 and pwm3 don't support max and step settings on all chips.
> + * Need to check support while generating/removing attribute files.
> + */
> +static struct sensor_device_attribute sda_sf3_max_step_arrays[] = {
> +	SENSOR_ATTR(pwm1_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
> +		    store_fan_max_output, 0),
> +	SENSOR_ATTR(pwm1_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
> +		    store_fan_step_output, 0),
>  	SENSOR_ATTR(pwm2_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
>  		    store_fan_max_output, 1),
>  	SENSOR_ATTR(pwm2_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
>  		    store_fan_step_output, 1),
> +	SENSOR_ATTR(pwm3_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
> +		    store_fan_max_output, 2),
> +	SENSOR_ATTR(pwm3_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
> +		    store_fan_step_output, 2),
>  };
>  
>  static ssize_t
> @@ -1235,6 +1268,12 @@ static void w83627ehf_device_remove_files(struct device *dev)
>  
>  	for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays); i++)
>  		device_remove_file(dev, &sda_sf3_arrays[i].dev_attr);
> +	for (i = 0; i < ARRAY_SIZE(sda_sf3_max_step_arrays); i++) {
> +		struct sensor_device_attribute *attr =
> +		  &sda_sf3_max_step_arrays[i];
> +		if (data->REG_FAN_STEP_OUTPUT[attr->index] != 0xff)
> +			device_remove_file(dev, &attr->dev_attr);
> +	}
>  	for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++)
>  		device_remove_file(dev, &sda_sf3_arrays_fan4[i].dev_attr);
>  	for (i = 0; i < data->in_num; i++) {
> @@ -1352,6 +1391,11 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
>  		data->in6_skip = !data->temp3_disable;
>  	}
>  
> +	data->REG_FAN_START_OUTPUT = W83627EHF_REG_FAN_START_OUTPUT;
> +	data->REG_FAN_STOP_OUTPUT = W83627EHF_REG_FAN_STOP_OUTPUT;
> +	data->REG_FAN_MAX_OUTPUT = W83627EHF_REG_FAN_MAX_OUTPUT;
> +	data->REG_FAN_STEP_OUTPUT = W83627EHF_REG_FAN_STEP_OUTPUT;
> +
>  	/* Initialize the chip */
>  	w83627ehf_init_device(data);
>  
> @@ -1440,6 +1484,15 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
>  			&sda_sf3_arrays[i].dev_attr)))
>  			goto exit_remove;
>  
> +	for (i = 0; i < ARRAY_SIZE(sda_sf3_max_step_arrays); i++) {
> +		struct sensor_device_attribute *attr =
> +		  &sda_sf3_max_step_arrays[i];
> +		if (data->REG_FAN_STEP_OUTPUT[attr->index] != 0xff) {
> +			err = device_create_file(dev, &attr->dev_attr);
> +			if (err)
> +				goto exit_remove;
> +		}
> +	}
>  	/* if fan4 is enabled create the sf3 files for it */
>  	if ((data->has_fan & (1 << 3)) && data->pwm_num >= 4)
>  		for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++) {


Nice cleanup overall.

-- 
Jean Delvare

Re: [PATCH v4 1/2] hwmon: w83627ehf driver cleanup

[Guenter Roeck]

Hi Jean,

On Sun, Jul 04, 2010 at 07:24:42AM -0400, Jean Delvare wrote:
> Hi Guenter,
> 
> On Sat, 3 Jul 2010 15:13:21 -0700, Guenter Roeck wrote:
> > - Moved fan pwm register array pointers into per-instance data.
> > - Only read fan pwm data for installed/supported fans.
> > - Update fan max output and fan step output information from data in registers.
> > - Create max_output and step_output attribute files only if respective
> >   fan pwm registers exist.
> > 
> > Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
> > ---
> >  drivers/hwmon/w83627ehf.c |   59 ++++++++++++++++++++++++++++++++++++++++++--
> >  1 files changed, 56 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
> > index 0dcaba9..e01a3e9 100644
> > --- a/drivers/hwmon/w83627ehf.c
> > +++ b/drivers/hwmon/w83627ehf.c
> > @@ -277,6 +277,11 @@ struct w83627ehf_data {
> >  	struct device *hwmon_dev;
> >  	struct mutex lock;
> >  
> > +	const u8 *REG_FAN_START_OUTPUT;
> > +	const u8 *REG_FAN_STOP_OUTPUT;
> > +	const u8 *REG_FAN_MAX_OUTPUT;
> > +	const u8 *REG_FAN_STEP_OUTPUT;
> > +
> >  	struct mutex update_lock;
> >  	char valid;		/* !=0 if following fields are valid */
> >  	unsigned long last_updated;	/* In jiffies */
> > @@ -524,7 +529,10 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
> >  			}
> >  		}
> >  
> > -		for (i = 0; i < 4; i++) {
> > +		for (i = 0; i < data->pwm_num; i++) {
> > +			if (!(data->has_fan & (1 << i)))
> > +				continue;
> 
> I'm skeptical. data->has_fan refers to fan inputs, not fan outputs.
> There is no guarantee that pwm1 is mapped to fan1, etc., so you can't
> use data->has_fan to discard fan outputs.
> 
Maybe, but they are treated as 1:1 for fan4 when creating the pwm files,
and the pwm files for fan4 are not created if the matching bit isn't set.
This applies to all chips supported by this driver. And for fan1..3, the
mapping is supposed to be 1:1 per the driver documentation.

I figured that it does not make sense to read the registers for a non-existing
attribute file.

> > +
> >  			/* pwmcfg, tolerance mapped for i=0, i=1 to same reg */
> >  			if (i != 1) {
> >  				pwmcfg = w83627ehf_read_value(data,
> > @@ -546,6 +554,17 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
> >  						W83627EHF_REG_FAN_STOP_OUTPUT[i]);
> >  			data->fan_stop_time[i] = w83627ehf_read_value(data,
> >  						W83627EHF_REG_FAN_STOP_TIME[i]);
> > +
> > +			if (data->REG_FAN_MAX_OUTPUT[i] != 0xff)
> > +				data->fan_max_output[i] =
> > +				  w83627ehf_read_value(data,
> > +					       data->REG_FAN_MAX_OUTPUT[i]);
> > +
> > +			if (data->REG_FAN_STEP_OUTPUT[i] != 0xff)
> > +				data->fan_step_output[i] =
> > +				  w83627ehf_read_value(data,
> > +					       data->REG_FAN_STEP_OUTPUT[i]);
> > +
> 
> Huuu, wait a minute, So these values were supposedly exposed to
> user-space, but were never read from their respective registers? So
> this is a plain bug you're fixing?
> 
This one, yes.

> Now I'm wondering, how useful is a feature that has been broken forever
> and nobody ever complained?
> 
No idea, really.

> >  			data->target_temp[i] =
> >  				w83627ehf_read_value(data,
> >  					W83627EHF_REG_TARGET[i]) &
> > @@ -1126,7 +1145,7 @@ store_##reg(struct device *dev, struct device_attribute *attr, \
> >  	u32 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 1, 255); \
> >  	mutex_lock(&data->update_lock); \
> >  	data->reg[nr] = val; \
> > -	w83627ehf_write_value(data, W83627EHF_REG_##REG[nr], val); \
> > +	w83627ehf_write_value(data, data->REG_##REG[nr], val); \
> >  	mutex_unlock(&data->update_lock); \
> >  	return count; \
> >  }
> > @@ -1206,12 +1225,26 @@ static struct sensor_device_attribute sda_sf3_arrays[] = {
> >  		    store_fan_stop_output, 1),
> >  	SENSOR_ATTR(pwm3_stop_output, S_IWUSR | S_IRUGO, show_fan_stop_output,
> >  		    store_fan_stop_output, 2),
> > +};
> >  
> > -	/* pwm1 and pwm3 don't support max and step settings */
> > +
> > +/*
> > + * pwm1 and pwm3 don't support max and step settings on all chips.
> > + * Need to check support while generating/removing attribute files.
> > + */
> > +static struct sensor_device_attribute sda_sf3_max_step_arrays[] = {
> > +	SENSOR_ATTR(pwm1_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
> > +		    store_fan_max_output, 0),
> > +	SENSOR_ATTR(pwm1_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
> > +		    store_fan_step_output, 0),
> >  	SENSOR_ATTR(pwm2_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
> >  		    store_fan_max_output, 1),
> >  	SENSOR_ATTR(pwm2_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
> >  		    store_fan_step_output, 1),
> > +	SENSOR_ATTR(pwm3_max_output, S_IWUSR | S_IRUGO, show_fan_max_output,
> > +		    store_fan_max_output, 2),
> > +	SENSOR_ATTR(pwm3_step_output, S_IWUSR | S_IRUGO, show_fan_step_output,
> > +		    store_fan_step_output, 2),
> >  };
> >  
> >  static ssize_t
> > @@ -1235,6 +1268,12 @@ static void w83627ehf_device_remove_files(struct device *dev)
> >  
> >  	for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays); i++)
> >  		device_remove_file(dev, &sda_sf3_arrays[i].dev_attr);
> > +	for (i = 0; i < ARRAY_SIZE(sda_sf3_max_step_arrays); i++) {
> > +		struct sensor_device_attribute *attr =
> > +		  &sda_sf3_max_step_arrays[i];
> > +		if (data->REG_FAN_STEP_OUTPUT[attr->index] != 0xff)
> > +			device_remove_file(dev, &attr->dev_attr);
> > +	}
> >  	for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++)
> >  		device_remove_file(dev, &sda_sf3_arrays_fan4[i].dev_attr);
> >  	for (i = 0; i < data->in_num; i++) {
> > @@ -1352,6 +1391,11 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
> >  		data->in6_skip = !data->temp3_disable;
> >  	}
> >  
> > +	data->REG_FAN_START_OUTPUT = W83627EHF_REG_FAN_START_OUTPUT;
> > +	data->REG_FAN_STOP_OUTPUT = W83627EHF_REG_FAN_STOP_OUTPUT;
> > +	data->REG_FAN_MAX_OUTPUT = W83627EHF_REG_FAN_MAX_OUTPUT;
> > +	data->REG_FAN_STEP_OUTPUT = W83627EHF_REG_FAN_STEP_OUTPUT;
> > +
> >  	/* Initialize the chip */
> >  	w83627ehf_init_device(data);
> >  
> > @@ -1440,6 +1484,15 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
> >  			&sda_sf3_arrays[i].dev_attr)))
> >  			goto exit_remove;
> >  
> > +	for (i = 0; i < ARRAY_SIZE(sda_sf3_max_step_arrays); i++) {
> > +		struct sensor_device_attribute *attr =
> > +		  &sda_sf3_max_step_arrays[i];
> > +		if (data->REG_FAN_STEP_OUTPUT[attr->index] != 0xff) {
> > +			err = device_create_file(dev, &attr->dev_attr);
> > +			if (err)
> > +				goto exit_remove;
> > +		}
> > +	}
> >  	/* if fan4 is enabled create the sf3 files for it */
> >  	if ((data->has_fan & (1 << 3)) && data->pwm_num >= 4)
> >  		for (i = 0; i < ARRAY_SIZE(sda_sf3_arrays_fan4); i++) {
> 
> 
> Nice cleanup overall.
> 
Thanks

Guenter

Re: [PATCH v4 1/2] hwmon: w83627ehf driver cleanup

[Jean Delvare]

Hi Guenter,

On Sun, 4 Jul 2010 06:50:10 -0700, Guenter Roeck wrote:
> On Sun, Jul 04, 2010 at 07:24:42AM -0400, Jean Delvare wrote:
> > I'm skeptical. data->has_fan refers to fan inputs, not fan outputs.
> > There is no guarantee that pwm1 is mapped to fan1, etc., so you can't
> > use data->has_fan to discard fan outputs.
>
> Maybe, but they are treated as 1:1 for fan4 when creating the pwm files,
> and the pwm files for fan4 are not created if the matching bit isn't set.
> This applies to all chips supported by this driver. And for fan1..3, the
> mapping is supposed to be 1:1 per the driver documentation.

The driver documentation was written by ourselves, I wouldn't trust it ;)

Oh well, I hadn't noticed that sysfs file creation already assumes a
1:1 fan to pwm mapping. I am still unsure if it is correct, but it might
be good enough on practice, and your patch isn't changing it anyway, so
it's not the time to discuss it.

> I figured that it does not make sense to read the registers for a non-existing
> attribute file.

I agree that we want to skip register reads when possible (not that it
matters as much as when reading over slow SMBus though.) 

I have no further objections to your patch, so I'll apply it now. Then
I'll publish the patches and update the stand-alone driver, and we can
call for testers.

-- 
Jean Delvare

Re: [lm-sensors] [PATCH v4 1/2] hwmon: w83627ehf driver cleanup

[Jean Delvare]

On Mon, 5 Jul 2010 13:59:00 +0200, Jean Delvare wrote:
> I have no further objections to your patch, so I'll apply it now. Then
> I'll publish the patches and update the stand-alone driver, and we can
> call for testers.

Standalone driver is available for testing:
http://khali.linux-fr.org/devel/misc/w83667hg/

-- 
Jean Delvare

[PATCH v4 2/2] hwmon: Add support for W83667HG-B to w83627ehf driver

[Guenter Roeck]

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
---
 Documentation/hwmon/w83627ehf |   15 +++++++++----
 drivers/hwmon/w83627ehf.c     |   42 ++++++++++++++++++++++++++++++++--------
 2 files changed, 43 insertions(+), 14 deletions(-)

diff --git a/Documentation/hwmon/w83627ehf b/Documentation/hwmon/w83627ehf
index b7e42ec..13d5561 100644
--- a/Documentation/hwmon/w83627ehf
+++ b/Documentation/hwmon/w83627ehf
@@ -20,6 +20,10 @@ Supported chips:
     Prefix: 'w83667hg'
     Addresses scanned: ISA address retrieved from Super I/O registers
     Datasheet: not available
+  * Winbond W83667HG-B
+    Prefix: 'w83667hg'
+    Addresses scanned: ISA address retrieved from Super I/O registers
+    Datasheet: Available from Nuvoton upon request
 
 Authors:
         Jean Delvare <khali@linux-fr.org>
@@ -32,8 +36,8 @@ Description
 -----------
 
 This driver implements support for the Winbond W83627EHF, W83627EHG,
-W83627DHG, W83627DHG-P and W83667HG super I/O chips. We will refer to them
-collectively as Winbond chips.
+W83627DHG, W83627DHG-P, W83667HG and W83667HG-B super I/O chips.
+We will refer to them collectively as Winbond chips.
 
 The chips implement three temperature sensors, five fan rotation
 speed sensors, ten analog voltage sensors (only nine for the 627DHG), one
@@ -68,14 +72,15 @@ follows:
 temp1 -> pwm1
 temp2 -> pwm2
 temp3 -> pwm3
-prog  -> pwm4 (not on 667HG; the programmable setting is not supported by
-	       the driver)
+prog  -> pwm4 (not on 667HG and 667HG-B; the programmable setting is not
+	       supported by the driver)
 
 /sys files
 ----------
 
 name - this is a standard hwmon device entry. For the W83627EHF and W83627EHG,
-       it is set to "w83627ehf" and for the W83627DHG it is set to "w83627dhg"
+       it is set to "w83627ehf", for the W83627DHG it is set to "w83627dhg",
+       and for the W83667HG it is set to "w83667hg".
 
 pwm[1-4] - this file stores PWM duty cycle or DC value (fan speed) in range:
 	   0 (stop) to 255 (full)
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index e01a3e9..e96e69d 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -39,6 +39,7 @@
     w83627dhg    9      5       4       3      0xa020 0xc1    0x5ca3
     w83627dhg-p  9      5       4       3      0xb070 0xc1    0x5ca3
     w83667hg     9      5       3       3      0xa510 0xc1    0x5ca3
+    w83667hg-b   9      5       3       3      0xb350 0xc1    0x5ca3
 */
 
 #include <linux/module.h>
@@ -55,7 +56,7 @@
 #include <linux/io.h>
 #include "lm75.h"
 
-enum kinds { w83627ehf, w83627dhg, w83627dhg_p, w83667hg };
+enum kinds { w83627ehf, w83627dhg, w83627dhg_p, w83667hg, w83667hg_b };
 
 /* used to set data->name = w83627ehf_device_names[data->sio_kind] */
 static const char * w83627ehf_device_names[] = {
@@ -63,6 +64,7 @@ static const char * w83627ehf_device_names[] = {
 	"w83627dhg",
 	"w83627dhg",
 	"w83667hg",
+	"w83667hg",
 };
 
 static unsigned short force_id;
@@ -91,6 +93,7 @@ MODULE_PARM_DESC(force_id, "Override the detected device ID");
 #define SIO_W83627DHG_ID	0xa020
 #define SIO_W83627DHG_P_ID	0xb070
 #define SIO_W83667HG_ID 	0xa510
+#define SIO_W83667HG_B_ID	0xb350
 #define SIO_ID_MASK		0xFFF0
 
 static inline void
@@ -201,8 +204,14 @@ static const u8 W83627EHF_REG_TOLERANCE[] = { 0x07, 0x07, 0x14, 0x62 };
 static const u8 W83627EHF_REG_FAN_START_OUTPUT[] = { 0x0a, 0x0b, 0x16, 0x65 };
 static const u8 W83627EHF_REG_FAN_STOP_OUTPUT[] = { 0x08, 0x09, 0x15, 0x64 };
 static const u8 W83627EHF_REG_FAN_STOP_TIME[] = { 0x0c, 0x0d, 0x17, 0x66 };
-static const u8 W83627EHF_REG_FAN_MAX_OUTPUT[] = { 0xff, 0x67, 0xff, 0x69 };
-static const u8 W83627EHF_REG_FAN_STEP_OUTPUT[] = { 0xff, 0x68, 0xff, 0x6a };
+
+static const u8 W83627EHF_REG_FAN_MAX_OUTPUT_COMMON[]
+						= { 0xff, 0x67, 0xff, 0x69 };
+static const u8 W83627EHF_REG_FAN_STEP_OUTPUT_COMMON[]
+						= { 0xff, 0x68, 0xff, 0x6a };
+
+static const u8 W83627EHF_REG_FAN_MAX_OUTPUT_W83667_B[] = { 0x67, 0x69, 0x6b };
+static const u8 W83627EHF_REG_FAN_STEP_OUTPUT_W83667_B[] = { 0x68, 0x6a, 0x6c };
 
 /*
  * Conversions
@@ -1382,10 +1391,11 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
 	/* 627EHG and 627EHF have 10 voltage inputs; 627DHG and 667HG have 9 */
 	data->in_num = (sio_data->kind == w83627ehf) ? 10 : 9;
 	/* 667HG has 3 pwms */
-	data->pwm_num = (sio_data->kind == w83667hg) ? 3 : 4;
+	data->pwm_num = (sio_data->kind == w83667hg
+			 || sio_data->kind == w83667hg_b) ? 3 : 4;
 
 	/* Check temp3 configuration bit for 667HG */
-	if (sio_data->kind == w83667hg) {
+	if (sio_data->kind == w83667hg || sio_data->kind == w83667hg_b) {
 		data->temp3_disable = w83627ehf_read_value(data,
 					W83627EHF_REG_TEMP_CONFIG[1]) & 0x01;
 		data->in6_skip = !data->temp3_disable;
@@ -1393,8 +1403,17 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
 
 	data->REG_FAN_START_OUTPUT = W83627EHF_REG_FAN_START_OUTPUT;
 	data->REG_FAN_STOP_OUTPUT = W83627EHF_REG_FAN_STOP_OUTPUT;
-	data->REG_FAN_MAX_OUTPUT = W83627EHF_REG_FAN_MAX_OUTPUT;
-	data->REG_FAN_STEP_OUTPUT = W83627EHF_REG_FAN_STEP_OUTPUT;
+	if (sio_data->kind == w83667hg_b) {
+		data->REG_FAN_MAX_OUTPUT =
+		  W83627EHF_REG_FAN_MAX_OUTPUT_W83667_B;
+		data->REG_FAN_STEP_OUTPUT =
+		  W83627EHF_REG_FAN_STEP_OUTPUT_W83667_B;
+	} else {
+		data->REG_FAN_MAX_OUTPUT =
+		  W83627EHF_REG_FAN_MAX_OUTPUT_COMMON;
+		data->REG_FAN_STEP_OUTPUT =
+		  W83627EHF_REG_FAN_STEP_OUTPUT_COMMON;
+	}
 
 	/* Initialize the chip */
 	w83627ehf_init_device(data);
@@ -1402,7 +1421,7 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
 	data->vrm = vid_which_vrm();
 	superio_enter(sio_data->sioreg);
 	/* Read VID value */
-	if (sio_data->kind == w83667hg) {
+	if (sio_data->kind == w83667hg || sio_data->kind == w83667hg_b) {
 		/* W83667HG has different pins for VID input and output, so
 		we can get the VID input values directly at logical device D
 		0xe3. */
@@ -1453,7 +1472,7 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
 	}
 
 	/* fan4 and fan5 share some pins with the GPIO and serial flash */
-	if (sio_data->kind == w83667hg) {
+	if (sio_data->kind == w83667hg || sio_data->kind == w83667hg_b) {
 		fan5pin = superio_inb(sio_data->sioreg, 0x27) & 0x20;
 		fan4pin = superio_inb(sio_data->sioreg, 0x27) & 0x40;
 	} else {
@@ -1609,6 +1628,7 @@ static int __init w83627ehf_find(int sioaddr, unsigned short *addr,
 	static const char __initdata sio_name_W83627DHG[] = "W83627DHG";
 	static const char __initdata sio_name_W83627DHG_P[] = "W83627DHG-P";
 	static const char __initdata sio_name_W83667HG[] = "W83667HG";
+	static const char __initdata sio_name_W83667HG_B[] = "W83667HG-B";
 
 	u16 val;
 	const char *sio_name;
@@ -1641,6 +1661,10 @@ static int __init w83627ehf_find(int sioaddr, unsigned short *addr,
 		sio_data->kind = w83667hg;
 		sio_name = sio_name_W83667HG;
 		break;
+	case SIO_W83667HG_B_ID:
+		sio_data->kind = w83667hg_b;
+		sio_name = sio_name_W83667HG_B;
+		break;
 	default:
 		if (val != 0xffff)
 			pr_debug(DRVNAME ": unsupported chip ID: 0x%04x\n",
-- 
1.7.0.87.g0901d

Re: [PATCH v4 2/2] hwmon: Add support for W83667HG-B to w83627ehf driver

[Jean Delvare]

Hi Guenter,

On Sat, 3 Jul 2010 15:13:22 -0700, Guenter Roeck wrote:
> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
> ---
>  Documentation/hwmon/w83627ehf |   15 +++++++++----
>  drivers/hwmon/w83627ehf.c     |   42 ++++++++++++++++++++++++++++++++--------
>  2 files changed, 43 insertions(+), 14 deletions(-)

Looks very good, no objection. I'll pick this patch in my tree.

-- 
Jean Delvare