linux-kernel - Re: [PATCH 1/3] i8k: Add support for temperature sensor labels

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Date:	Sun, 30 Nov 2014 12:48:30 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Pali Rohár <pali.rohar@...il.com>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:	Steven Honeyman <stevenhoneyman@...il.com>,
	linux-kernel@...r.kernel.org,
	Gabriele Mazzotta <gabriele.mzt@...il.com>
Subject: Re: [PATCH 1/3] i8k: Add support for temperature sensor labels

On 11/30/2014 12:26 PM, Pali Rohár wrote:
> This patch adds labels for temperature sensors if SMM function with EAX register
> 0x11a3 reports it. This information was taken from DOS binary NBSVC.MDM.
>
> Signed-off-by: Pali Rohár <pali.rohar@...il.com>

Nitpick below, otherwise

Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Tested-by: Guenter Roeck <linux@...ck-us.net>

Thanks,
Guenter

> ---
>   drivers/char/i8k.c |   74 +++++++++++++++++++++++++++++++++++++++++++---------
>   1 file changed, 61 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
> index e34a019..4be72a4 100644
> --- a/drivers/char/i8k.c
> +++ b/drivers/char/i8k.c
> @@ -42,6 +42,7 @@
>   #define I8K_SMM_GET_FAN		0x00a3
>   #define I8K_SMM_GET_SPEED	0x02a3
>   #define I8K_SMM_GET_TEMP	0x10a3
> +#define I8K_SMM_GET_TEMP_TYPE	0x11a3
>   #define I8K_SMM_GET_DELL_SIG1	0xfea3
>   #define I8K_SMM_GET_DELL_SIG2	0xffa3
>
> @@ -288,6 +289,14 @@ static int i8k_set_fan(int fan, int speed)
>   	return i8k_smm(&regs) ? : i8k_get_fan_status(fan);
>   }
>
> +static int i8k_get_temp_type(int sensor)
> +{
> +	struct smm_regs regs = { .eax = I8K_SMM_GET_TEMP_TYPE, };
> +
> +	regs.ebx = sensor & 0xff;
> +	return i8k_smm(&regs) ? : regs.eax & 0xff;
> +}
> +
>   /*
>    * Read the cpu temperature.
>    */
> @@ -493,6 +502,29 @@ static int i8k_open_fs(struct inode *inode, struct file *file)
>    * Hwmon interface
>    */
>
> +static ssize_t i8k_hwmon_show_temp_label(struct device *dev,
> +				   struct device_attribute *devattr,
> +				   char *buf)

Continuation lines should be aligned with '('.

> +{
> +	static const char * const labels[] = {
> +		"CPU",
> +		"GPU",
> +		"SODIMM",
> +		"Other",
> +		"Ambient",
> +		"Other",
> +	};
> +	int index = to_sensor_dev_attr(devattr)->index;
> +	int type;
> +
> +	type = i8k_get_temp_type(index);
> +	if (type < 0)
> +		return type;
> +	if (type >= ARRAY_SIZE(labels))
> +		type = ARRAY_SIZE(labels) - 1;
> +	return sprintf(buf, "%s\n", labels[type]);
> +}
> +
>   static ssize_t i8k_hwmon_show_temp(struct device *dev,
>   				   struct device_attribute *devattr,
>   				   char *buf)
> @@ -555,9 +587,17 @@ static ssize_t i8k_hwmon_set_pwm(struct device *dev,
>   }
>
>   static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 0);
> +static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> +			  0);
>   static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 1);
> +static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> +			  1);
>   static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 2);
> +static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> +			  2);
>   static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 3);
> +static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
> +			  3);
>   static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL,
>   			  I8K_FAN_LEFT);
>   static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm,
> @@ -569,31 +609,39 @@ static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, i8k_hwmon_show_pwm,
>
>   static struct attribute *i8k_attrs[] = {
>   	&sensor_dev_attr_temp1_input.dev_attr.attr,	/* 0 */
> -	&sensor_dev_attr_temp2_input.dev_attr.attr,	/* 1 */
> -	&sensor_dev_attr_temp3_input.dev_attr.attr,	/* 2 */
> -	&sensor_dev_attr_temp4_input.dev_attr.attr,	/* 3 */
> -	&sensor_dev_attr_fan1_input.dev_attr.attr,	/* 4 */
> -	&sensor_dev_attr_pwm1.dev_attr.attr,		/* 5 */
> -	&sensor_dev_attr_fan2_input.dev_attr.attr,	/* 6 */
> -	&sensor_dev_attr_pwm2.dev_attr.attr,		/* 7 */
> +	&sensor_dev_attr_temp1_label.dev_attr.attr,	/* 1 */
> +	&sensor_dev_attr_temp2_input.dev_attr.attr,	/* 2 */
> +	&sensor_dev_attr_temp2_label.dev_attr.attr,	/* 3 */
> +	&sensor_dev_attr_temp3_input.dev_attr.attr,	/* 4 */
> +	&sensor_dev_attr_temp3_label.dev_attr.attr,	/* 5 */
> +	&sensor_dev_attr_temp4_input.dev_attr.attr,	/* 6 */
> +	&sensor_dev_attr_temp4_label.dev_attr.attr,	/* 7 */
> +	&sensor_dev_attr_fan1_input.dev_attr.attr,	/* 8 */
> +	&sensor_dev_attr_pwm1.dev_attr.attr,		/* 9 */
> +	&sensor_dev_attr_fan2_input.dev_attr.attr,	/* 10 */
> +	&sensor_dev_attr_pwm2.dev_attr.attr,		/* 11 */
>   	NULL
>   };
>
>   static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr,
>   			      int index)
>   {
> -	if (index == 0 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1))
> +	if (index >= 0 && index <= 1 &&
> +	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP1))
>   		return 0;
> -	if (index == 1 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2))
> +	if (index >= 2 && index <= 3 &&
> +	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP2))
>   		return 0;
> -	if (index == 2 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3))
> +	if (index >= 4 && index <= 5 &&
> +	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP3))
>   		return 0;
> -	if (index == 3 && !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4))
> +	if (index >= 6 && index <= 7 &&
> +	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4))
>   		return 0;
> -	if (index >= 4 && index <= 5 &&
> +	if (index >= 8 && index <= 9 &&
>   	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1))
>   		return 0;
> -	if (index >= 6 && index <= 7 &&
> +	if (index >= 10 && index <= 11 &&
>   	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2))
>   		return 0;
>
>

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