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-rw-r--r--drivers/hwmon/w83627ehf.c86
1 files changed, 59 insertions, 27 deletions
diff --git a/drivers/hwmon/w83627ehf.c b/drivers/hwmon/w83627ehf.c
index b3b4f2b41dcf..df6e50260e01 100644
--- a/drivers/hwmon/w83627ehf.c
+++ b/drivers/hwmon/w83627ehf.c
@@ -234,7 +234,7 @@ static const u16 NCT6775_REG_FAN_STOP_TIME[] = { 0x107, 0x207, 0x307 };
static const u16 NCT6775_REG_PWM[] = { 0x109, 0x209, 0x309 };
static const u16 NCT6775_REG_FAN_MAX_OUTPUT[] = { 0x10a, 0x20a, 0x30a };
static const u16 NCT6775_REG_FAN_STEP_OUTPUT[] = { 0x10b, 0x20b, 0x30b };
-static const u16 NCT6776_REG_FAN[] = { 0x630, 0x632, 0x634, 0x636, 0x638 };
+static const u16 NCT6775_REG_FAN[] = { 0x630, 0x632, 0x634, 0x636, 0x638 };
static const u16 NCT6776_REG_FAN_MIN[] = { 0x63a, 0x63c, 0x63e, 0x640, 0x642};
static const u16 NCT6775_REG_TEMP[]
@@ -342,21 +342,36 @@ static inline u8 step_time_to_reg(unsigned int msec, u8 mode)
(msec + 200) / 400), 1, 255);
}
-static inline unsigned int
-fan_from_reg(int reg, u16 val, unsigned int div)
+static unsigned int fan_from_reg8(u16 reg, unsigned int divreg)
{
- if (val == 0)
+ if (reg == 0 || reg == 255)
return 0;
- if (is_word_sized(reg)) {
- if ((val & 0xff1f) == 0xff1f)
- return 0;
- val = (val & 0x1f) | ((val & 0xff00) >> 3);
- } else {
- if (val == 255 || div == 0)
- return 0;
- val *= div;
- }
- return 1350000U / val;
+ return 1350000U / (reg << divreg);
+}
+
+static unsigned int fan_from_reg13(u16 reg, unsigned int divreg)
+{
+ if ((reg & 0xff1f) == 0xff1f)
+ return 0;
+
+ reg = (reg & 0x1f) | ((reg & 0xff00) >> 3);
+
+ if (reg == 0)
+ return 0;
+
+ return 1350000U / reg;
+}
+
+static unsigned int fan_from_reg16(u16 reg, unsigned int divreg)
+{
+ if (reg == 0 || reg == 0xffff)
+ return 0;
+
+ /*
+ * Even though the registers are 16 bit wide, the fan divisor
+ * still applies.
+ */
+ return 1350000U / (reg << divreg);
}
static inline unsigned int
@@ -424,6 +439,9 @@ struct w83627ehf_data {
const u16 *REG_FAN_MAX_OUTPUT;
const u16 *REG_FAN_STEP_OUTPUT;
+ unsigned int (*fan_from_reg)(u16 reg, unsigned int divreg);
+ unsigned int (*fan_from_reg_min)(u16 reg, unsigned int divreg);
+
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
@@ -439,6 +457,7 @@ struct w83627ehf_data {
u8 fan_div[5];
u8 has_fan; /* some fan inputs can be disabled */
u8 has_fan_min; /* some fans don't have min register */
+ bool has_fan_div;
u8 temp_type[3];
s16 temp[9];
s16 temp_max[9];
@@ -769,8 +788,8 @@ static struct w83627ehf_data *w83627ehf_update_device(struct device *dev)
/* If we failed to measure the fan speed and clock
divider can be increased, let's try that for next
time */
- if (!is_word_sized(data->REG_FAN[i])
- && (data->fan[i] == 0xff
+ if (data->has_fan_div
+ && (data->fan[i] >= 0xff
|| (sio_data->kind == nct6775
&& data->fan[i] == 0x00))
&& data->fan_div[i] < 0x07) {
@@ -966,9 +985,7 @@ show_fan(struct device *dev, struct device_attribute *attr, char *buf)
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
return sprintf(buf, "%d\n",
- fan_from_reg(data->REG_FAN[nr],
- data->fan[nr],
- div_from_reg(data->fan_div[nr])));
+ data->fan_from_reg(data->fan[nr], data->fan_div[nr]));
}
static ssize_t
@@ -978,9 +995,8 @@ show_fan_min(struct device *dev, struct device_attribute *attr, char *buf)
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
return sprintf(buf, "%d\n",
- fan_from_reg(data->REG_FAN_MIN[nr],
- data->fan_min[nr],
- div_from_reg(data->fan_div[nr])));
+ data->fan_from_reg_min(data->fan_min[nr],
+ data->fan_div[nr]));
}
static ssize_t
@@ -1010,7 +1026,11 @@ store_fan_min(struct device *dev, struct device_attribute *attr,
return err;
mutex_lock(&data->update_lock);
- if (is_word_sized(data->REG_FAN_MIN[nr])) {
+ if (!data->has_fan_div) {
+ /*
+ * Only NCT6776F for now, so we know that this is a 13 bit
+ * register
+ */
if (!val) {
val = 0xff1f;
} else {
@@ -1034,7 +1054,7 @@ store_fan_min(struct device *dev, struct device_attribute *attr,
new_div = 7; /* 128 == (1 << 7) */
dev_warn(dev, "fan%u low limit %lu below minimum %u, set to "
"minimum\n", nr + 1, val,
- fan_from_reg(data->REG_FAN_MIN[nr], 254, 128));
+ data->fan_from_reg_min(254, 7));
} else if (!reg) {
/* Speed above this value cannot possibly be represented,
even with the lowest divider (1) */
@@ -1042,7 +1062,7 @@ store_fan_min(struct device *dev, struct device_attribute *attr,
new_div = 0; /* 1 == (1 << 0) */
dev_warn(dev, "fan%u low limit %lu above maximum %u, set to "
"maximum\n", nr + 1, val,
- fan_from_reg(data->REG_FAN_MIN[nr], 1, 1));
+ data->fan_from_reg_min(1, 0));
} else {
/* Automatically pick the best divider, i.e. the one such
that the min limit will correspond to a register value
@@ -1943,9 +1963,12 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
}
if (sio_data->kind == nct6775) {
+ data->has_fan_div = true;
+ data->fan_from_reg = fan_from_reg16;
+ data->fan_from_reg_min = fan_from_reg8;
data->REG_PWM = NCT6775_REG_PWM;
data->REG_TARGET = NCT6775_REG_TARGET;
- data->REG_FAN = W83627EHF_REG_FAN;
+ data->REG_FAN = NCT6775_REG_FAN;
data->REG_FAN_MIN = W83627EHF_REG_FAN_MIN;
data->REG_FAN_START_OUTPUT = NCT6775_REG_FAN_START_OUTPUT;
data->REG_FAN_STOP_OUTPUT = NCT6775_REG_FAN_STOP_OUTPUT;
@@ -1953,14 +1976,20 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
data->REG_FAN_MAX_OUTPUT = NCT6775_REG_FAN_MAX_OUTPUT;
data->REG_FAN_STEP_OUTPUT = NCT6775_REG_FAN_STEP_OUTPUT;
} else if (sio_data->kind == nct6776) {
+ data->has_fan_div = false;
+ data->fan_from_reg = fan_from_reg13;
+ data->fan_from_reg_min = fan_from_reg13;
data->REG_PWM = NCT6775_REG_PWM;
data->REG_TARGET = NCT6775_REG_TARGET;
- data->REG_FAN = NCT6776_REG_FAN;
+ data->REG_FAN = NCT6775_REG_FAN;
data->REG_FAN_MIN = NCT6776_REG_FAN_MIN;
data->REG_FAN_START_OUTPUT = NCT6775_REG_FAN_START_OUTPUT;
data->REG_FAN_STOP_OUTPUT = NCT6775_REG_FAN_STOP_OUTPUT;
data->REG_FAN_STOP_TIME = NCT6775_REG_FAN_STOP_TIME;
} else if (sio_data->kind == w83667hg_b) {
+ data->has_fan_div = true;
+ data->fan_from_reg = fan_from_reg8;
+ data->fan_from_reg_min = fan_from_reg8;
data->REG_PWM = W83627EHF_REG_PWM;
data->REG_TARGET = W83627EHF_REG_TARGET;
data->REG_FAN = W83627EHF_REG_FAN;
@@ -1973,6 +2002,9 @@ static int __devinit w83627ehf_probe(struct platform_device *pdev)
data->REG_FAN_STEP_OUTPUT =
W83627EHF_REG_FAN_STEP_OUTPUT_W83667_B;
} else {
+ data->has_fan_div = true;
+ data->fan_from_reg = fan_from_reg8;
+ data->fan_from_reg_min = fan_from_reg8;
data->REG_PWM = W83627EHF_REG_PWM;
data->REG_TARGET = W83627EHF_REG_TARGET;
data->REG_FAN = W83627EHF_REG_FAN;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.