linux-kernel - Re: [PATCH] dell-smm-hwmon: Detect fan with index=2

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Date:	Sun, 22 May 2016 02:31:12 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Jean Delvare <jdelvare@...e.com>, Tolga Cakir <cevelnet@...il.com>,
	linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dell-smm-hwmon: Detect fan with index=2

On Sunday 22 May 2016 02:21:46 Guenter Roeck wrote:
> On 05/21/2016 07:52 AM, Pali Rohár wrote:
> > Some Dell machines (e.g. Dell Precision M3800) have two fans, first
> > with index=0 and second with index=2. So export also attributes
> > for third fan device with index=2.
> > 
> > Reported-by: Tolga Cakir <cevelnet@...il.com>
> > Signed-off-by: Pali Rohár <pali.rohar@...il.com>
> > ---
> > 
> >   drivers/hwmon/dell-smm-hwmon.c |   20 +++++++++++++++++++-
> >   1 file changed, 19 insertions(+), 1 deletion(-)
> > 
> > ---
> > 
> > Hi Tolga! Can you test this patch if sensors see fan device
> > correctly?
> 
> I assume this means I should wait for test results before applying
> the patch ?

Yes, testing should be done.

Do you have some pending/testing/next tree/branch for such patches?

> Thanks,
> Guenter
> 
> > diff --git a/drivers/hwmon/dell-smm-hwmon.c
> > b/drivers/hwmon/dell-smm-hwmon.c index 577445f..7a2764a 100644
> > --- a/drivers/hwmon/dell-smm-hwmon.c
> > +++ b/drivers/hwmon/dell-smm-hwmon.c
> > @@ -78,6 +78,7 @@ static uint i8k_fan_max = I8K_FAN_HIGH;
> > 
> >   #define I8K_HWMON_HAVE_TEMP4	(1 << 3)
> >   #define I8K_HWMON_HAVE_FAN1	(1 << 4)
> >   #define I8K_HWMON_HAVE_FAN2	(1 << 5)
> > 
> > +#define I8K_HWMON_HAVE_FAN3	(1 << 6)
> > 
> >   MODULE_AUTHOR("Massimo Dal Zotto (dz@...ian.org)");
> >   MODULE_AUTHOR("Pali Rohár <pali.rohar@...il.com>");
> > 
> > @@ -246,7 +247,7 @@ static int _i8k_get_fan_type(int fan)
> > 
> >   static int i8k_get_fan_type(int fan)
> >   {
> >   
> >   	/* I8K_SMM_GET_FAN_TYPE SMM call is expensive, so cache values
> >   	*/
> > 
> > -	static int types[2] = { INT_MIN, INT_MIN };
> > +	static int types[3] = { INT_MIN, INT_MIN, INT_MIN };
> > 
> >   	if (types[fan] == INT_MIN)
> >   	
> >   		types[fan] = _i8k_get_fan_type(fan);
> > 
> > @@ -707,6 +708,12 @@ static SENSOR_DEVICE_ATTR(fan2_label, S_IRUGO,
> > i8k_hwmon_show_fan_label, NULL,
> > 
> >   			  1);
> >   
> >   static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR,
> >   i8k_hwmon_show_pwm,
> >   
> >   			  i8k_hwmon_set_pwm, 1);
> > 
> > +static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, i8k_hwmon_show_fan,
> > NULL, +			  2);
> > +static SENSOR_DEVICE_ATTR(fan3_label, S_IRUGO,
> > i8k_hwmon_show_fan_label, NULL, +			  2);
> > +static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR,
> > i8k_hwmon_show_pwm, +			  i8k_hwmon_set_pwm, 2);
> > 
> >   static struct attribute *i8k_attrs[] = {
> >   
> >   	&sensor_dev_attr_temp1_input.dev_attr.attr,	/* 0 */
> > 
> > @@ -723,6 +730,9 @@ static struct attribute *i8k_attrs[] = {
> > 
> >   	&sensor_dev_attr_fan2_input.dev_attr.attr,	/* 11 */
> >   	&sensor_dev_attr_fan2_label.dev_attr.attr,	/* 12 */
> >   	&sensor_dev_attr_pwm2.dev_attr.attr,		/* 13 */
> > 
> > +	&sensor_dev_attr_fan3_input.dev_attr.attr,	/* 14 */
> > +	&sensor_dev_attr_fan3_label.dev_attr.attr,	/* 15 */
> > +	&sensor_dev_attr_pwm3.dev_attr.attr,		/* 16 */
> > 
> >   	NULL
> >   
> >   };
> > 
> > @@ -747,6 +757,9 @@ static umode_t i8k_is_visible(struct kobject
> > *kobj, struct attribute *attr,
> > 
> >   	if (index >= 11 && index <= 13 &&
> >   	
> >   	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2))
> >   		
> >   		return 0;
> > 
> > +	if (index >= 14 && index <= 16 &&
> > +	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN3))
> > +		return 0;
> > 
> >   	return attr->mode;
> >   
> >   }
> > 
> > @@ -788,6 +801,11 @@ static int __init i8k_init_hwmon(void)
> > 
> >   	if (err >= 0)
> >   	
> >   		i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN2;
> > 
> > +	/* Third fan attributes, if fan status is OK */
> > +	err = i8k_get_fan_status(2);
> > +	if (err >= 0)
> > +		i8k_hwmon_flags |= I8K_HWMON_HAVE_FAN3;
> > +
> > 
> >   	i8k_hwmon_dev = hwmon_device_register_with_groups(NULL,
> >   	"dell_smm",
> >   	
> >   							  NULL, i8k_groups);
> >   	
> >   	if (IS_ERR(i8k_hwmon_dev)) {

-- 
Pali Rohár
pali.rohar@...il.com

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