Re: [PATCH] dell-smm-hwmon.c: Additional temperature sensors

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On 12/7/18 4:56 PM, Michele Sorcinelli wrote:

The code has been extended to support up to 10 temperature sensors.

The i8k_get_temp_type() calls inside i8k_init_hwmon() have been replaced
with i8k_get_temp() as in some laptop firmwares the related SMM procedure
is not implemented correctly so i8k_get_temp_type() can't be used to
discover temperature sensors.

Signed-off-by: Michele Sorcinelli <michelesr@xxxxxxxxxxxxx>


Please _always_ version your patches, and add a changelog, at least if you
would like to see it applied. I have now two patches which look almost the same,
meaning I would have to pull both versions, compare, and hope to apply the
correct one.

Anyway, I would like to get some feedback if this can cause regressions
on systems which don't support that many sensors and maybe report something
completely different if one tries to read the high-numbered sensors.
I seem to recall that there was a reason for checking the type and not just
trying to read sensor values.

Guenter


---
  drivers/hwmon/dell-smm-hwmon.c | 113 +++++++++++++++++++++++++++------
  1 file changed, 94 insertions(+), 19 deletions(-)
  mode change 100644 => 100755 drivers/hwmon/dell-smm-hwmon.c

diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c
old mode 100644
new mode 100755
index 367a8a617..b58f756ea
--- a/drivers/hwmon/dell-smm-hwmon.c
+++ b/drivers/hwmon/dell-smm-hwmon.c
@@ -82,9 +82,16 @@ static bool disallow_fan_support;
  #define I8K_HWMON_HAVE_TEMP2	(1 << 1)
  #define I8K_HWMON_HAVE_TEMP3	(1 << 2)
  #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)
+#define I8K_HWMON_HAVE_TEMP5	(1 << 4)
+#define I8K_HWMON_HAVE_TEMP6	(1 << 5)
+#define I8K_HWMON_HAVE_TEMP7	(1 << 6)
+#define I8K_HWMON_HAVE_TEMP8	(1 << 7)
+#define I8K_HWMON_HAVE_TEMP9	(1 << 8)
+#define I8K_HWMON_HAVE_TEMP10	(1 << 9)
+
+#define I8K_HWMON_HAVE_FAN1	(1 << 10)
+#define I8K_HWMON_HAVE_FAN2	(1 << 11)
+#define I8K_HWMON_HAVE_FAN3	(1 << 12)
MODULE_AUTHOR("Massimo Dal Zotto (dz@xxxxxxxxxx)"); 
  MODULE_AUTHOR("Pali Rohár <pali.rohar@xxxxxxxxx>");
@@ -743,6 +750,25 @@ static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
  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(temp5_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 4);
+static SENSOR_DEVICE_ATTR(temp5_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
+			  4);
+static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 5);
+static SENSOR_DEVICE_ATTR(temp6_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
+			  5);
+static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 6);
+static SENSOR_DEVICE_ATTR(temp7_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
+			  6);
+static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 7);
+static SENSOR_DEVICE_ATTR(temp8_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
+			  7);
+static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 8);
+static SENSOR_DEVICE_ATTR(temp9_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
+			  8);
+static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, i8k_hwmon_show_temp, NULL, 9);
+static SENSOR_DEVICE_ATTR(temp10_label, S_IRUGO, i8k_hwmon_show_temp_label, NULL,
+			  9);
+
  static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, i8k_hwmon_show_fan, NULL, 0);
  static SENSOR_DEVICE_ATTR(fan1_label, S_IRUGO, i8k_hwmon_show_fan_label, NULL,
  			  0);
@@ -770,15 +796,27 @@ static struct attribute *i8k_attrs[] = {
  	&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_fan1_label.dev_attr.attr,	/* 9 */
-	&sensor_dev_attr_pwm1.dev_attr.attr,		/* 10 */
-	&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 */
+	&sensor_dev_attr_temp5_input.dev_attr.attr,	/* 8 */
+	&sensor_dev_attr_temp5_label.dev_attr.attr,	/* 9 */
+	&sensor_dev_attr_temp6_input.dev_attr.attr,	/* 10 */
+	&sensor_dev_attr_temp6_label.dev_attr.attr,	/* 11 */
+	&sensor_dev_attr_temp7_input.dev_attr.attr,	/* 12 */
+	&sensor_dev_attr_temp7_label.dev_attr.attr,	/* 13 */
+	&sensor_dev_attr_temp8_input.dev_attr.attr,	/* 14 */
+	&sensor_dev_attr_temp8_label.dev_attr.attr,	/* 15 */
+	&sensor_dev_attr_temp9_input.dev_attr.attr,	/* 16 */
+	&sensor_dev_attr_temp9_label.dev_attr.attr,	/* 17 */
+	&sensor_dev_attr_temp10_input.dev_attr.attr,	/* 18 */
+	&sensor_dev_attr_temp10_label.dev_attr.attr,	/* 19 */
+	&sensor_dev_attr_fan1_input.dev_attr.attr,	/* 20 */
+	&sensor_dev_attr_fan1_label.dev_attr.attr,	/* 21 */
+	&sensor_dev_attr_pwm1.dev_attr.attr,		/* 22 */
+	&sensor_dev_attr_fan2_input.dev_attr.attr,	/* 23 */
+	&sensor_dev_attr_fan2_label.dev_attr.attr,	/* 24 */
+	&sensor_dev_attr_pwm2.dev_attr.attr,		/* 25 */
+	&sensor_dev_attr_fan3_input.dev_attr.attr,	/* 26 */
+	&sensor_dev_attr_fan3_label.dev_attr.attr,	/* 27 */
+	&sensor_dev_attr_pwm3.dev_attr.attr,		/* 28 */
  	NULL
  };
@@ -802,13 +840,32 @@ static umode_t i8k_is_visible(struct kobject *kobj, struct attribute *attr, 
  	if (index >= 6 && index <= 7 &&
  	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP4))
  		return 0;
-	if (index >= 8 && index <= 10 &&
+	if (index >= 8 && index <= 9 &&
+	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP5))
+		return 0;
+	if (index >= 10 && index <= 11 &&
+	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP6))
+		return 0;
+	if (index >= 12 && index <= 13 &&
+	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP7))
+		return 0;
+	if (index >= 14 && index <= 15 &&
+	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP8))
+		return 0;
+	if (index >= 16 && index <= 17 &&
+	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP9))
+		return 0;
+	if (index >= 18 && index <= 19 &&
+	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_TEMP10))
+		return 0;
+
+	if (index >= 20 && index <= 22 &&
  	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN1))
  		return 0;
-	if (index >= 11 && index <= 13 &&
+	if (index >= 23 && index <= 25 &&
  	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN2))
  		return 0;
-	if (index >= 14 && index <= 16 &&
+	if (index >= 26 && index <= 28 &&
  	    !(i8k_hwmon_flags & I8K_HWMON_HAVE_FAN3))
  		return 0;
@@ -828,19 +885,37 @@ static int __init i8k_init_hwmon(void) 
  	i8k_hwmon_flags = 0;
/* CPU temperature attributes, if temperature type is OK */ 
-	err = i8k_get_temp_type(0);
+	err = i8k_get_temp(0);
  	if (err >= 0)
  		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1;
  	/* check for additional temperature sensors */
-	err = i8k_get_temp_type(1);
+	err = i8k_get_temp(1);
  	if (err >= 0)
  		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2;
-	err = i8k_get_temp_type(2);
+	err = i8k_get_temp(2);
  	if (err >= 0)
  		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3;
-	err = i8k_get_temp_type(3);
+	err = i8k_get_temp(3);
  	if (err >= 0)
  		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4;
+	err = i8k_get_temp(4);
+	if (err >= 0)
+		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP5;
+	err = i8k_get_temp(5);
+	if (err >= 0)
+		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP6;
+	err = i8k_get_temp(6);
+	if (err >= 0)
+		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP7;
+	err = i8k_get_temp(7);
+	if (err >= 0)
+		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP8;
+	err = i8k_get_temp(8);
+	if (err >= 0)
+		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP9;
+	err = i8k_get_temp(9);
+	if (err >= 0)
+		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP10;
/* First fan attributes, if fan status or type is OK */ 
  	err = i8k_get_fan_status(0);
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