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Subject[PATCH v5 04/11] hwmon: (w83627ehf) Improve support for W83667HG-B
Date
Add support for 4th temperature sensor on W83677HG-B.
Display temperature labels on W83677HG-B to report temperature sources.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
---
Documentation/hwmon/w83627ehf | 19 +++--
drivers/hwmon/w83627ehf.c | 155 ++++++++++++++++++++++++++++++++--------
2 files changed, 136 insertions(+), 38 deletions(-)
diff --git a/Documentation/hwmon/w83627ehf b/Documentation/hwmon/w83627ehf
index 13d5561..0643019 100644
--- a/Documentation/hwmon/w83627ehf
+++ b/Documentation/hwmon/w83627ehf
@@ -39,16 +39,21 @@ This driver implements support for the Winbond W83627EHF, W83627EHG,
W83627DHG, W83627DHG-P, W83667HG and W83667HG-B super I/O chips.
We will refer to them collectively as Winbond chips.

-The chips implement three temperature sensors, five fan rotation
-speed sensors, ten analog voltage sensors (only nine for the 627DHG), one
-VID (6 pins for the 627EHF/EHG, 8 pins for the 627DHG and 667HG), alarms
-with beep warnings (control unimplemented), and some automatic fan
+The chips implement three temperature sensors (up to four for 667HG-B),
+five fan rotation speed sensors, ten analog voltage sensors (only nine for the
+627DHG), one VID (6 pins for the 627EHF/EHG, 8 pins for the 627DHG and 667HG),
+alarms with beep warnings (control unimplemented), and some automatic fan
regulation strategies (plus manual fan control mode).

+The temperature sensor sources on W82677HG-B are configurable. temp4 is only
+reported if its temperature source differs from the temperature sources of the
+other three temperature sensors. The configured source for each of the
+temperature sensors is reported in tempX_label.
+
Temperatures are measured in degrees Celsius and measurement resolution is 1
-degC for temp1 and 0.5 degC for temp2 and temp3. An alarm is triggered when
-the temperature gets higher than high limit; it stays on until the temperature
-falls below the hysteresis value.
+degC for temp1 and temp4, and 0.5 degC for temp2 and temp3. An alarm is
+triggered when the temperature gets higher than high limit; it stays on until
+the temperature falls below the hysteresis value.

Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
triggered if the rotation speed has dropped below a programmable limit. Fan
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index 5a627b9..d10fe70 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -39,7 +39,7 @@
w83627dhg 9 5 4 3 0xa020 0xc1 0x5ca3
w83627dhg-p 9 5 4 3 0xb070 0xc1 0x5ca3
w83667hg 9 5 3 3 0xa510 0xc1 0x5ca3
- w83667hg-b 9 5 3 3 0xb350 0xc1 0x5ca3
+ w83667hg-b 9 5 3 4 0xb350 0xc1 0x5ca3
*/

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -164,10 +164,10 @@ static const u16 W83627EHF_REG_FAN_MIN[] = { 0x3b, 0x3c, 0x3d, 0x3e, 0x55c };
#define W83627EHF_REG_IN(nr) ((nr < 7) ? (0x20 + (nr)) : \
(0x550 + (nr) - 7))

-static const u16 W83627EHF_REG_TEMP[] = { 0x27, 0x150, 0x250 };
-static const u16 W83627EHF_REG_TEMP_HYST[] = { 0x3a, 0x153, 0x253 };
-static const u16 W83627EHF_REG_TEMP_OVER[] = { 0x39, 0x155, 0x255 };
-static const u16 W83627EHF_REG_TEMP_CONFIG[] = { 0, 0x152, 0x252 };
+static const u16 W83627EHF_REG_TEMP[] = { 0x27, 0x150, 0x250, 0x7e };
+static const u16 W83627EHF_REG_TEMP_HYST[] = { 0x3a, 0x153, 0x253, 0 };
+static const u16 W83627EHF_REG_TEMP_OVER[] = { 0x39, 0x155, 0x255, 0 };
+static const u16 W83627EHF_REG_TEMP_CONFIG[] = { 0, 0x152, 0x252, 0 };

/* Fan clock dividers are spread over the following five registers */
#define W83627EHF_REG_FANDIV1 0x47
@@ -213,6 +213,19 @@ static const u8 W83627EHF_REG_FAN_STEP_OUTPUT_COMMON[]
static const u8 W83627EHF_REG_FAN_MAX_OUTPUT_W83667_B[] = { 0x67, 0x69, 0x6b };
static const u8 W83627EHF_REG_FAN_STEP_OUTPUT_W83667_B[] = { 0x68, 0x6a, 0x6c };

+static const char *const w83667hg_b_temp_label[] = {
+ "SYSTIN",
+ "CPUTIN",
+ "AUXTIN",
+ "AMDTSI",
+ "PECI Agent 1",
+ "PECI Agent 2",
+ "PECI Agent 3",
+ "PECI Agent 4"
+};
+
+#define NUM_REG_TEMP 4
+
static inline int is_word_sized(u16 reg)
{
return (((reg & 0xff00) == 0x100
@@ -294,6 +307,9 @@ struct w83627ehf_data {
struct device *hwmon_dev;
struct mutex lock;

+ u8 temp_src[NUM_REG_TEMP];
+ const char * const *temp_label;
+
const u8 *REG_FAN_START_OUTPUT;
const u8 *REG_FAN_STOP_OUTPUT;
const u8 *REG_FAN_MAX_OUTPUT;
@@ -314,9 +330,9 @@ struct w83627ehf_data {
u8 fan_div[5];
u8 has_fan; /* some fan inputs can be disabled */
u8 temp_type[3];
- s16 temp[3];
- s16 temp_max[3];
- s16 temp_max_hyst[3];
+ s16 temp[4];
+ s16 temp_max[4];
+ s16 temp_max_hyst[4];
u32 alarms;

u8 pwm_mode[4]; /* 0->DC variable voltage, 1->PWM variable duty cycle */
@@ -339,7 +355,7 @@ struct w83627ehf_data {
u8 vid;
u8 vrm;

- u8 temp3_disable;
+ u8 have_temp;
u8 in6_skip;
};

@@ -577,12 +593,18 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
}

/* Measured temperatures and limits */
- for (i = 0; i < 3; i++) {
- data->temp[i] = w83627ehf_read_value(data,
- W83627EHF_REG_TEMP[i]);
- data->temp_max[i] = w83627ehf_read_value(data,
- W83627EHF_REG_TEMP_OVER[i]);
- data->temp_max_hyst[i] = w83627ehf_read_value(data,
+ for (i = 0; i < NUM_REG_TEMP; i++) {
+ if (!(data->have_temp & (1 << i)))
+ continue;
+ data->temp[i]
+ = w83627ehf_read_value(data, W83627EHF_REG_TEMP[i]);
+ if (i > 2)
+ break;
+ data->temp_max[i]
+ = w83627ehf_read_value(data,
+ W83627EHF_REG_TEMP_OVER[i]);
+ data->temp_max_hyst[i]
+ = w83627ehf_read_value(data,
W83627EHF_REG_TEMP_HYST[i]);
}

@@ -844,6 +866,15 @@ static struct sensor_device_attribute sda_fan_div[] = {
SENSOR_ATTR(fan5_div, S_IRUGO, show_fan_div, NULL, 4),
};

+static ssize_t
+show_temp_label(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct w83627ehf_data *data = w83627ehf_update_device(dev);
+ struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
+ int nr = sensor_attr->index;
+ return sprintf(buf, "%s\n", data->temp_label[data->temp_src[nr]]);
+}
+
#define show_temp_reg(REG, reg) \
static ssize_t \
show_##reg(struct device *dev, struct device_attribute *attr, \
@@ -897,6 +928,14 @@ static struct sensor_device_attribute sda_temp_input[] = {
SENSOR_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0),
SENSOR_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1),
SENSOR_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2),
+ SENSOR_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3),
+};
+
+static struct sensor_device_attribute sda_temp_label[] = {
+ SENSOR_ATTR(temp1_label, S_IRUGO, show_temp_label, NULL, 0),
+ SENSOR_ATTR(temp2_label, S_IRUGO, show_temp_label, NULL, 1),
+ SENSOR_ATTR(temp3_label, S_IRUGO, show_temp_label, NULL, 2),
+ SENSOR_ATTR(temp4_label, S_IRUGO, show_temp_label, NULL, 3),
};

static struct sensor_device_attribute sda_temp_max[] = {
@@ -1328,10 +1367,13 @@ static void w83627ehf_device_remove_files(struct device *dev)
device_remove_file(dev, &sda_target_temp[i].dev_attr);
device_remove_file(dev, &sda_tolerance[i].dev_attr);
}
- for (i = 0; i < 3; i++) {
- if ((i == 2) && data->temp3_disable)
+ for (i = 0; i < NUM_REG_TEMP; i++) {
+ if (!(data->have_temp & (1 << i)))
continue;
device_remove_file(dev, &sda_temp_input[i].dev_attr);
+ device_remove_file(dev, &sda_temp_label[i].dev_attr);
+ if (i > 2)
+ break;
device_remove_file(dev, &sda_temp_max[i].dev_attr);
device_remove_file(dev, &sda_temp_max_hyst[i].dev_attr);
device_remove_file(dev, &sda_temp_alarm[i].dev_attr);
@@ -1354,12 +1396,14 @@ static inline void __devinit w83627ehf_init_device(struct w83627ehf_data *data)
w83627ehf_write_value(data, W83627EHF_REG_CONFIG,
tmp | 0x01);

- /* Enable temp2 and temp3 if needed */
- for (i = 1; i < 3; i++) {
+ /* Enable temperature sensors if needed */
+ for (i = 0; i < NUM_REG_TEMP; i++) {
+ if (!(data->have_temp & (1 << i)))
+ continue;
+ if (!W83627EHF_REG_TEMP_CONFIG[i])
+ continue;
tmp = w83627ehf_read_value(data,
W83627EHF_REG_TEMP_CONFIG[i]);
- if ((i == 2) && data->temp3_disable)
- continue;
if (tmp & 0x01)
w83627ehf_write_value(data,
W83627EHF_REG_TEMP_CONFIG[i],
@@ -1417,11 +1461,52 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
data->pwm_num = (sio_data->kind == w83667hg
|| sio_data->kind == w83667hg_b) ? 3 : 4;

+ data->have_temp = 0x07;
/* Check temp3 configuration bit for 667HG */
- if (sio_data->kind == w83667hg || sio_data->kind == w83667hg_b) {
- data->temp3_disable = w83627ehf_read_value(data,
- W83627EHF_REG_TEMP_CONFIG[2]) & 0x01;
- data->in6_skip = !data->temp3_disable;
+ if (sio_data->kind == w83667hg) {
+ u8 reg;
+
+ reg = w83627ehf_read_value(data, W83627EHF_REG_TEMP_CONFIG[2]);
+ if (reg & 0x01)
+ data->have_temp &= ~(1 << 2);
+ else
+ data->in6_skip = 1; /* Either temp3 or in6 */
+ } else if (sio_data->kind == w83667hg_b) {
+ u8 reg;
+
+ reg = w83627ehf_read_value(data, 0x4a);
+ data->temp_src[0] = reg >> 5;
+ reg = w83627ehf_read_value(data, 0x49);
+ data->temp_src[1] = reg & 0x07;
+ data->temp_src[2] = (reg >> 4) & 0x07;
+
+ /*
+ * W83667HG-B has another temperature register at 0x7e.
+ * The temperature source is selected with register 0x7d.
+ * Support it if the source differs from already reported
+ * sources.
+ */
+ reg = w83627ehf_read_value(data, 0x7d);
+ reg &= 0x07;
+ if (reg != data->temp_src[0] && reg != data->temp_src[1]
+ && reg != data->temp_src[2]) {
+ data->temp_src[3] = reg;
+ data->have_temp |= 1 << 3;
+ }
+
+ /*
+ * Chip supports either AUXTIN or VIN3. Try to find out which
+ * one.
+ */
+ reg = w83627ehf_read_value(data, W83627EHF_REG_TEMP_CONFIG[2]);
+ if (data->temp_src[2] == 2 && (reg & 0x01))
+ data->have_temp &= ~(1 << 2);
+
+ if ((data->temp_src[2] == 2 && (data->have_temp & (1 << 2)))
+ || (data->temp_src[3] == 2 && (data->have_temp & (1 << 3))))
+ data->in6_skip = 1;
+
+ data->temp_label = w83667hg_b_temp_label;
}

data->REG_FAN_START_OUTPUT = W83627EHF_REG_FAN_START_OUTPUT;
@@ -1584,13 +1669,21 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
}
}

- for (i = 0; i < 3; i++) {
- if ((i == 2) && data->temp3_disable)
+ for (i = 0; i < NUM_REG_TEMP; i++) {
+ if (!(data->have_temp & (1 << i)))
continue;
- if ((err = device_create_file(dev,
- &sda_temp_input[i].dev_attr))
- || (err = device_create_file(dev,
- &sda_temp_max[i].dev_attr))
+ err = device_create_file(dev, &sda_temp_input[i].dev_attr);
+ if (err)
+ goto exit_remove;
+ if (data->temp_label) {
+ err = device_create_file(dev,
+ &sda_temp_label[i].dev_attr);
+ if (err)
+ goto exit_remove;
+ }
+ if (i > 2)
+ break;
+ if ((err = device_create_file(dev, &sda_temp_max[i].dev_attr))
|| (err = device_create_file(dev,
&sda_temp_max_hyst[i].dev_attr))
|| (err = device_create_file(dev,
--
1.7.3.1


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