hwmon: (nct7802) Add auto_point attributes

Introduced REG_PWM, pwm[1..3]_auto_point[1..5]_temp,
pwm[1..3]_auto_point[1..5]_pwm, nct7802_auto_point_attrs,
nct7802_auto_point_group, updated nct7802_regmap_is_volatile

Signed-off-by: Constantine Shulyupin <const@MakeLinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 126 insertions, 4 deletions

diff --git a/drivers/hwmon/nct7802.c b/drivers/hwmon/nct7802.c
index f4908bb228b8..3ce33d244cc0 100644
--- a/drivers/hwmon/nct7802.c
+++ b/drivers/hwmon/nct7802.c
@@ -53,6 +53,7 @@ static const u8 REG_VOLTAGE_LIMIT_MSB_SHIFT[2][5] = {
 #define REG_PECI_ENABLE         0x23
 #define REG_FAN_ENABLE          0x24
 #define REG_VMON_ENABLE         0x25
+#define REG_PWM(x)              (0x60 + (x))
 #define REG_SMARTFAN_EN(x)      (0x64 + (x) / 2)
 #define SMARTFAN_EN_SHIFT(x)    ((x) % 2 * 4)
 #define REG_VENDOR_ID           0xfd
@@ -130,6 +131,9 @@ static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
         unsigned int val;
         int ret;
 
+        if (!attr->index)
+                return sprintf(buf, "255\n");
+
         ret = regmap_read(data->regmap, attr->index, &val);
         if (ret < 0)
                 return ret;
@@ -826,9 +830,12 @@ static SENSOR_DEVICE_ATTR(pwm2_mode, S_IRUGO, show_pwm_mode, NULL, 1);
 static SENSOR_DEVICE_ATTR(pwm3_mode, S_IRUGO, show_pwm_mode, NULL, 2);
 
 /* 7.2.91... Fan Control Output Value */
-static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x60);
-static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x61);
-static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm, 0x62);
+static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
+                          REG_PWM(0));
+static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
+                          REG_PWM(1));
+static SENSOR_DEVICE_ATTR(pwm3, S_IRUGO | S_IWUSR, show_pwm, store_pwm,
+                          REG_PWM(2));
 
 /* 7.2.95... Temperature to Fan mapping Relationships Register */
 static SENSOR_DEVICE_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, show_pwm_enable,
@@ -893,11 +900,125 @@ static struct attribute_group nct7802_pwm_group = {
         .attrs = nct7802_pwm_attrs,
 };
 
+/* 7.2.115... 0x80-0x83, 0x84 Temperature (X-axis) transition */
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point1_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0x80, 0);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point2_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0x81, 0);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point3_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0x82, 0);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point4_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0x83, 0);
+static SENSOR_DEVICE_ATTR_2(pwm1_auto_point5_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0x84, 0);
+
+/* 7.2.120... 0x85-0x88 PWM (Y-axis) transition */
+static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0x85);
+static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0x86);
+static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0x87);
+static SENSOR_DEVICE_ATTR(pwm1_auto_point4_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0x88);
+static SENSOR_DEVICE_ATTR(pwm1_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
+
+/* 7.2.124 Table 2 X-axis Transition Point 1 Register */
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point1_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0x90, 0);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point2_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0x91, 0);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point3_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0x92, 0);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point4_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0x93, 0);
+static SENSOR_DEVICE_ATTR_2(pwm2_auto_point5_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0x94, 0);
+
+/* 7.2.129 Table 2 Y-axis Transition Point 1 Register */
+static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0x95);
+static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0x96);
+static SENSOR_DEVICE_ATTR(pwm2_auto_point3_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0x97);
+static SENSOR_DEVICE_ATTR(pwm2_auto_point4_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0x98);
+static SENSOR_DEVICE_ATTR(pwm2_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
+
+/* 7.2.133 Table 3 X-axis Transition Point 1 Register */
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point1_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0xA0, 0);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point2_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0xA1, 0);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point3_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0xA2, 0);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point4_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0xA3, 0);
+static SENSOR_DEVICE_ATTR_2(pwm3_auto_point5_temp, S_IRUGO | S_IWUSR,
+                            show_temp, store_temp, 0xA4, 0);
+
+/* 7.2.138 Table 3 Y-axis Transition Point 1 Register */
+static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0xA5);
+static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0xA6);
+static SENSOR_DEVICE_ATTR(pwm3_auto_point3_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0xA7);
+static SENSOR_DEVICE_ATTR(pwm3_auto_point4_pwm, S_IRUGO | S_IWUSR,
+                          show_pwm, store_pwm, 0xA8);
+static SENSOR_DEVICE_ATTR(pwm3_auto_point5_pwm, S_IRUGO, show_pwm, NULL, 0);
+
+static struct attribute *nct7802_auto_point_attrs[] = {
+        &sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point3_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point4_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point5_temp.dev_attr.attr,
+
+        &sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point4_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm1_auto_point5_pwm.dev_attr.attr,
+
+        &sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point3_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point4_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point5_temp.dev_attr.attr,
+
+        &sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point3_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point4_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm2_auto_point5_pwm.dev_attr.attr,
+
+        &sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point3_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point4_temp.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point5_temp.dev_attr.attr,
+
+        &sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point3_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point4_pwm.dev_attr.attr,
+        &sensor_dev_attr_pwm3_auto_point5_pwm.dev_attr.attr,
+
+        NULL
+};
+
+static struct attribute_group nct7802_auto_point_group = {
+        .attrs = nct7802_auto_point_attrs,
+};
+
 static const struct attribute_group *nct7802_groups[] = {
         &nct7802_temp_group,
         &nct7802_in_group,
         &nct7802_fan_group,
         &nct7802_pwm_group,
+        &nct7802_auto_point_group,
         NULL
 };
 
@@ -945,7 +1066,8 @@ static int nct7802_detect(struct i2c_client *client,
 
 static bool nct7802_regmap_is_volatile(struct device *dev, unsigned int reg)
 {
-        return reg != REG_BANK && reg <= 0x20;
+        return (reg != REG_BANK && reg <= 0x20) ||
+                (reg >= REG_PWM(0) && reg <= REG_PWM(2));
 }
 
 static const struct regmap_config nct7802_regmap_config = {