hwmon: (it87) Add support for 6th fan of IT8620E

IT8620E supports up to 6 fan tachometers.

Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 33 insertions, 15 deletions

diff --git a/drivers/hwmon/it87.c b/drivers/hwmon/it87.c
index 4e4db72d38e8..8acbe8f852d1 100644
--- a/drivers/hwmon/it87.c
+++ b/drivers/hwmon/it87.c
@@ -216,11 +216,11 @@ static bool fix_pwm_polarity;
 
 /* Monitors: 9 voltage (0 to 7, battery), 3 temp (1 to 3), 3 fan (1 to 3) */
 
-static const u8 IT87_REG_FAN[]          = { 0x0d, 0x0e, 0x0f, 0x80, 0x82 };
-static const u8 IT87_REG_FAN_MIN[]      = { 0x10, 0x11, 0x12, 0x84, 0x86 };
-static const u8 IT87_REG_FANX[]         = { 0x18, 0x19, 0x1a, 0x81, 0x83 };
-static const u8 IT87_REG_FANX_MIN[]     = { 0x1b, 0x1c, 0x1d, 0x85, 0x87 };
-static const u8 IT87_REG_TEMP_OFFSET[]  = { 0x56, 0x57, 0x59 };
+static const u8 IT87_REG_FAN[]         = { 0x0d, 0x0e, 0x0f, 0x80, 0x82, 0x4c };
+static const u8 IT87_REG_FAN_MIN[]     = { 0x10, 0x11, 0x12, 0x84, 0x86, 0x4e };
+static const u8 IT87_REG_FANX[]        = { 0x18, 0x19, 0x1a, 0x81, 0x83, 0x4d };
+static const u8 IT87_REG_FANX_MIN[]    = { 0x1b, 0x1c, 0x1d, 0x85, 0x87, 0x4f };
+static const u8 IT87_REG_TEMP_OFFSET[] = { 0x56, 0x57, 0x59 };
 
 #define IT87_REG_FAN_MAIN_CTRL 0x13
 #define IT87_REG_FAN_CTL       0x14
@@ -264,6 +264,7 @@ struct it87_devices {
 #define FEAT_FIVE_FANS          (1 << 8)        /* Supports five fans */
 #define FEAT_VID                (1 << 9)        /* Set if chip supports VID */
 #define FEAT_IN7_INTERNAL       (1 << 10)       /* Set if in7 is internal */
+#define FEAT_SIX_FANS           (1 << 11)       /* Supports six fans */
 
 static const struct it87_devices it87_devices[] = {
         [it87] = {
@@ -382,7 +383,7 @@ static const struct it87_devices it87_devices[] = {
                 .name = "it8620",
                 .suffix = "E",
                 .features = FEAT_NEWER_AUTOPWM | FEAT_12MV_ADC | FEAT_16BIT_FANS
-                  | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_FIVE_FANS
+                  | FEAT_TEMP_OFFSET | FEAT_TEMP_PECI | FEAT_SIX_FANS
                   | FEAT_IN7_INTERNAL,
                 .peci_mask = 0x07,
         },
@@ -399,9 +400,11 @@ static const struct it87_devices it87_devices[] = {
                                 (((data)->features & FEAT_TEMP_OLD_PECI) && \
                                  ((data)->old_peci_mask & (1 << nr)))
 #define has_fan16_config(data)  ((data)->features & FEAT_FAN16_CONFIG)
-#define has_five_fans(data)     ((data)->features & FEAT_FIVE_FANS)
+#define has_five_fans(data)     ((data)->features & (FEAT_FIVE_FANS | \
+                                                     FEAT_SIX_FANS))
 #define has_vid(data)           ((data)->features & FEAT_VID)
 #define has_in7_internal(data)  ((data)->features & FEAT_IN7_INTERNAL)
+#define has_six_fans(data)      ((data)->features & FEAT_SIX_FANS)
 
 struct it87_sio_data {
         enum chips type;
@@ -438,7 +441,7 @@ struct it87_data {
         u16 in_scaled;          /* Internal voltage sensors are scaled */
         u8 in[10][3];           /* [nr][0]=in, [1]=min, [2]=max */
         u8 has_fan;             /* Bitfield, fans enabled */
-        u16 fan[5][2];          /* Register values, [nr][0]=fan, [1]=min */
+        u16 fan[6][2];          /* Register values, [nr][0]=fan, [1]=min */
         u8 has_temp;            /* Bitfield, temp sensors enabled */
         s8 temp[3][4];          /* [nr][0]=temp, [1]=min, [2]=max, [3]=offset */
         u8 sensor;              /* Register value (IT87_REG_TEMP_ENABLE) */
@@ -1277,6 +1280,10 @@ static SENSOR_DEVICE_ATTR_2(fan5_input, S_IRUGO, show_fan, NULL, 4, 0);
 static SENSOR_DEVICE_ATTR_2(fan5_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
                             4, 1);
 
+static SENSOR_DEVICE_ATTR_2(fan6_input, S_IRUGO, show_fan, NULL, 5, 0);
+static SENSOR_DEVICE_ATTR_2(fan6_min, S_IRUGO | S_IWUSR, show_fan, set_fan,
+                            5, 1);
+
 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
                           show_pwm_enable, set_pwm_enable, 0);
 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
@@ -1407,6 +1414,7 @@ static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 1);
 static SENSOR_DEVICE_ATTR(fan3_alarm, S_IRUGO, show_alarm, NULL, 2);
 static SENSOR_DEVICE_ATTR(fan4_alarm, S_IRUGO, show_alarm, NULL, 3);
 static SENSOR_DEVICE_ATTR(fan5_alarm, S_IRUGO, show_alarm, NULL, 6);
+static SENSOR_DEVICE_ATTR(fan6_alarm, S_IRUGO, show_alarm, NULL, 7);
 static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 16);
 static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 17);
 static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 18);
@@ -1457,6 +1465,7 @@ static SENSOR_DEVICE_ATTR(fan2_beep, S_IRUGO, show_beep, set_beep, 0);
 static SENSOR_DEVICE_ATTR(fan3_beep, S_IRUGO, show_beep, set_beep, 0);
 static SENSOR_DEVICE_ATTR(fan4_beep, S_IRUGO, show_beep, set_beep, 0);
 static SENSOR_DEVICE_ATTR(fan5_beep, S_IRUGO, show_beep, set_beep, 0);
+static SENSOR_DEVICE_ATTR(fan6_beep, S_IRUGO, show_beep, set_beep, 0);
 static SENSOR_DEVICE_ATTR(temp1_beep, S_IRUGO | S_IWUSR,
                           show_beep, set_beep, 2);
 static SENSOR_DEVICE_ATTR(temp2_beep, S_IRUGO, show_beep, NULL, 2);
@@ -1660,7 +1669,7 @@ static struct attribute *it87_attributes_temp_beep[] = {
         &sensor_dev_attr_temp3_beep.dev_attr.attr,
 };
 
-static struct attribute *it87_attributes_fan[5][3+1] = { {
+static struct attribute *it87_attributes_fan[6][3+1] = { {
         &sensor_dev_attr_fan1_input.dev_attr.attr,
         &sensor_dev_attr_fan1_min.dev_attr.attr,
         &sensor_dev_attr_fan1_alarm.dev_attr.attr,
@@ -1685,14 +1694,20 @@ static struct attribute *it87_attributes_fan[5][3+1] = { {
         &sensor_dev_attr_fan5_min.dev_attr.attr,
         &sensor_dev_attr_fan5_alarm.dev_attr.attr,
         NULL
+}, {
+        &sensor_dev_attr_fan6_input.dev_attr.attr,
+        &sensor_dev_attr_fan6_min.dev_attr.attr,
+        &sensor_dev_attr_fan6_alarm.dev_attr.attr,
+        NULL
 } };
 
-static const struct attribute_group it87_group_fan[5] = {
+static const struct attribute_group it87_group_fan[6] = {
         { .attrs = it87_attributes_fan[0] },
         { .attrs = it87_attributes_fan[1] },
         { .attrs = it87_attributes_fan[2] },
         { .attrs = it87_attributes_fan[3] },
         { .attrs = it87_attributes_fan[4] },
+        { .attrs = it87_attributes_fan[5] },
 };
 
 static const struct attribute *it87_attributes_fan_div[] = {
@@ -1774,6 +1789,7 @@ static struct attribute *it87_attributes_fan_beep[] = {
         &sensor_dev_attr_fan3_beep.dev_attr.attr,
         &sensor_dev_attr_fan4_beep.dev_attr.attr,
         &sensor_dev_attr_fan5_beep.dev_attr.attr,
+        &sensor_dev_attr_fan6_beep.dev_attr.attr,
 };
 
 static struct attribute *it87_attributes_vid[] = {
@@ -2155,7 +2171,7 @@ static void it87_remove_files(struct device *dev)
                         sysfs_remove_file(&dev->kobj,
                                           it87_attributes_temp_beep[i]);
         }
-        for (i = 0; i < 5; i++) {
+        for (i = 0; i < 6; i++) {
                 if (!(data->has_fan & (1 << i)))
                         continue;
                 sysfs_remove_group(&dev->kobj, &it87_group_fan[i]);
@@ -2312,7 +2328,7 @@ static int it87_probe(struct platform_device *pdev)
 
         /* Do not create fan files for disabled fans */
         fan_beep_need_rw = 1;
-        for (i = 0; i < 5; i++) {
+        for (i = 0; i < 6; i++) {
                 if (!(data->has_fan & (1 << i)))
                         continue;
                 err = sysfs_create_group(&dev->kobj, &it87_group_fan[i]);
@@ -2557,9 +2573,10 @@ static void it87_init_device(struct platform_device *pdev)
         }
         data->has_fan = (data->fan_main_ctrl >> 4) & 0x07;
 
+        tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
+
         /* Set tachometers to 16-bit mode if needed */
         if (has_fan16_config(data)) {
-                tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
                 if (~tmp & 0x07 & data->has_fan) {
                         dev_dbg(&pdev->dev,
                                 "Setting fan1-3 to 16-bit mode\n");
@@ -2570,11 +2587,12 @@ static void it87_init_device(struct platform_device *pdev)
 
         /* Check for additional fans */
         if (has_five_fans(data)) {
-                tmp = it87_read_value(data, IT87_REG_FAN_16BIT);
                 if (tmp & (1 << 4))
                         data->has_fan |= (1 << 3); /* fan4 enabled */
                 if (tmp & (1 << 5))
                         data->has_fan |= (1 << 4); /* fan5 enabled */
+                if (has_six_fans(data) && (tmp & (1 << 2)))
+                        data->has_fan |= (1 << 5); /* fan6 enabled */
         }
 
         /* Fan input pins may be used for alternative functions */
@@ -2642,7 +2660,7 @@ static struct it87_data *it87_update_device(struct device *dev)
                 if (data->type == it8603)
                         data->in[9][0] = it87_read_value(data, 0x2f);
 
-                for (i = 0; i < 5; i++) {
+                for (i = 0; i < 6; i++) {
                         /* Skip disabled fans */
                         if (!(data->has_fan & (1 << i)))
                                 continue;