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path: root/drivers/hwmon/w83781d.c
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Diffstat (limited to 'drivers/hwmon/w83781d.c')
-rw-r--r--drivers/hwmon/w83781d.c82
1 files changed, 51 insertions, 31 deletions
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index 64c1f8af5bb2..e4c700356c44 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -42,6 +42,7 @@
#include <linux/hwmon.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
+#include <linux/mutex.h>
#include <asm/io.h>
#include "lm75.h"
@@ -56,6 +57,10 @@ I2C_CLIENT_INSMOD_5(w83781d, w83782d, w83783s, w83627hf, as99127f);
I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
"{bus, clientaddr, subclientaddr1, subclientaddr2}");
+static int reset;
+module_param(reset, bool, 0);
+MODULE_PARM_DESC(reset, "Set to one to reset chip on load");
+
static int init = 1;
module_param(init, bool, 0);
MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");
@@ -226,10 +231,10 @@ DIV_TO_REG(long val, enum chips type)
struct w83781d_data {
struct i2c_client client;
struct class_device *class_dev;
- struct semaphore lock;
+ struct mutex lock;
enum chips type;
- struct semaphore update_lock;
+ struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
@@ -267,9 +272,8 @@ static int w83781d_isa_attach_adapter(struct i2c_adapter *adapter);
static int w83781d_detect(struct i2c_adapter *adapter, int address, int kind);
static int w83781d_detach_client(struct i2c_client *client);
-static int w83781d_read_value(struct i2c_client *client, u16 register);
-static int w83781d_write_value(struct i2c_client *client, u16 register,
- u16 value);
+static int w83781d_read_value(struct i2c_client *client, u16 reg);
+static int w83781d_write_value(struct i2c_client *client, u16 reg, u16 value);
static struct w83781d_data *w83781d_update_device(struct device *dev);
static void w83781d_init_client(struct i2c_client *client);
@@ -311,11 +315,11 @@ static ssize_t store_in_##reg (struct device *dev, const char *buf, size_t count
\
val = simple_strtoul(buf, NULL, 10) / 10; \
\
- down(&data->update_lock); \
+ mutex_lock(&data->update_lock); \
data->in_##reg[nr] = IN_TO_REG(val); \
w83781d_write_value(client, W83781D_REG_IN_##REG(nr), data->in_##reg[nr]); \
\
- up(&data->update_lock); \
+ mutex_unlock(&data->update_lock); \
return count; \
}
store_in_reg(MIN, min);
@@ -381,13 +385,13 @@ store_fan_min(struct device *dev, const char *buf, size_t count, int nr)
val = simple_strtoul(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->fan_min[nr - 1] =
FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr - 1]));
w83781d_write_value(client, W83781D_REG_FAN_MIN(nr),
data->fan_min[nr - 1]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -446,7 +450,7 @@ static ssize_t store_temp_##reg (struct device *dev, const char *buf, size_t cou
\
val = simple_strtol(buf, NULL, 10); \
\
- down(&data->update_lock); \
+ mutex_lock(&data->update_lock); \
\
if (nr >= 2) { /* TEMP2 and TEMP3 */ \
data->temp_##reg##_add[nr-2] = LM75_TEMP_TO_REG(val); \
@@ -458,7 +462,7 @@ static ssize_t store_temp_##reg (struct device *dev, const char *buf, size_t cou
data->temp_##reg); \
} \
\
- up(&data->update_lock); \
+ mutex_unlock(&data->update_lock); \
return count; \
}
store_temp_reg(OVER, max);
@@ -571,7 +575,7 @@ store_beep_reg(struct device *dev, const char *buf, size_t count,
val = simple_strtoul(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if (update_mask == BEEP_MASK) { /* We are storing beep_mask */
data->beep_mask = BEEP_MASK_TO_REG(val, data->type);
@@ -592,7 +596,7 @@ store_beep_reg(struct device *dev, const char *buf, size_t count,
w83781d_write_value(client, W83781D_REG_BEEP_INTS2,
val2 | data->beep_enable << 7);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -637,7 +641,7 @@ store_fan_div_reg(struct device *dev, const char *buf, size_t count, int nr)
u8 reg;
unsigned long val = simple_strtoul(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
/* Save fan_min */
min = FAN_FROM_REG(data->fan_min[nr],
@@ -662,7 +666,7 @@ store_fan_div_reg(struct device *dev, const char *buf, size_t count, int nr)
data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
w83781d_write_value(client, W83781D_REG_FAN_MIN(nr+1), data->fan_min[nr]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -709,10 +713,10 @@ store_pwm_reg(struct device *dev, const char *buf, size_t count, int nr)
val = simple_strtoul(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->pwm[nr - 1] = PWM_TO_REG(val);
w83781d_write_value(client, W83781D_REG_PWM(nr), data->pwm[nr - 1]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -725,7 +729,7 @@ store_pwmenable_reg(struct device *dev, const char *buf, size_t count, int nr)
val = simple_strtoul(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
switch (val) {
case 0:
@@ -742,11 +746,11 @@ store_pwmenable_reg(struct device *dev, const char *buf, size_t count, int nr)
break;
default:
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return -EINVAL;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -808,7 +812,7 @@ store_sensor_reg(struct device *dev, const char *buf, size_t count, int nr)
val = simple_strtoul(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
switch (val) {
case 1: /* PII/Celeron diode */
@@ -841,7 +845,7 @@ store_sensor_reg(struct device *dev, const char *buf, size_t count, int nr)
break;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -1073,7 +1077,7 @@ w83781d_detect(struct i2c_adapter *adapter, int address, int kind)
new_client = &data->client;
i2c_set_clientdata(new_client, data);
new_client->addr = address;
- init_MUTEX(&data->lock);
+ mutex_init(&data->lock);
new_client->adapter = adapter;
new_client->driver = is_isa ? &w83781d_isa_driver : &w83781d_driver;
new_client->flags = 0;
@@ -1178,7 +1182,7 @@ w83781d_detect(struct i2c_adapter *adapter, int address, int kind)
data->type = kind;
data->valid = 0;
- init_MUTEX(&data->update_lock);
+ mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
@@ -1325,7 +1329,7 @@ w83781d_read_value(struct i2c_client *client, u16 reg)
int res, word_sized, bank;
struct i2c_client *cl;
- down(&data->lock);
+ mutex_lock(&data->lock);
if (i2c_is_isa_client(client)) {
word_sized = (((reg & 0xff00) == 0x100)
|| ((reg & 0xff00) == 0x200))
@@ -1383,7 +1387,7 @@ w83781d_read_value(struct i2c_client *client, u16 reg)
if (bank > 2)
i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
}
- up(&data->lock);
+ mutex_unlock(&data->lock);
return res;
}
@@ -1394,7 +1398,7 @@ w83781d_write_value(struct i2c_client *client, u16 reg, u16 value)
int word_sized, bank;
struct i2c_client *cl;
- down(&data->lock);
+ mutex_lock(&data->lock);
if (i2c_is_isa_client(client)) {
word_sized = (((reg & 0xff00) == 0x100)
|| ((reg & 0xff00) == 0x200))
@@ -1447,7 +1451,7 @@ w83781d_write_value(struct i2c_client *client, u16 reg, u16 value)
if (bank > 2)
i2c_smbus_write_byte_data(client, W83781D_REG_BANK, 0);
}
- up(&data->lock);
+ mutex_unlock(&data->lock);
return 0;
}
@@ -1459,8 +1463,17 @@ w83781d_init_client(struct i2c_client *client)
int type = data->type;
u8 tmp;
- if (init && type != as99127f) { /* this resets registers we don't have
+ if (reset && type != as99127f) { /* this resets registers we don't have
documentation for on the as99127f */
+ /* Resetting the chip has been the default for a long time,
+ but it causes the BIOS initializations (fan clock dividers,
+ thermal sensor types...) to be lost, so it is now optional.
+ It might even go away if nobody reports it as being useful,
+ as I see very little reason why this would be needed at
+ all. */
+ dev_info(&client->dev, "If reset=1 solved a problem you were "
+ "having, please report!\n");
+
/* save these registers */
i = w83781d_read_value(client, W83781D_REG_BEEP_CONFIG);
p = w83781d_read_value(client, W83781D_REG_PWMCLK12);
@@ -1477,6 +1490,13 @@ w83781d_init_client(struct i2c_client *client)
w83781d_write_value(client, W83781D_REG_BEEP_INTS2, 0);
}
+ /* Disable power-on abnormal beep, as advised by the datasheet.
+ Already done if reset=1. */
+ if (init && !reset && type != as99127f) {
+ i = w83781d_read_value(client, W83781D_REG_BEEP_CONFIG);
+ w83781d_write_value(client, W83781D_REG_BEEP_CONFIG, i | 0x80);
+ }
+
data->vrm = vid_which_vrm();
if ((type != w83781d) && (type != as99127f)) {
@@ -1533,7 +1553,7 @@ static struct w83781d_data *w83781d_update_device(struct device *dev)
struct w83781d_data *data = i2c_get_clientdata(client);
int i;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
@@ -1641,7 +1661,7 @@ static struct w83781d_data *w83781d_update_device(struct device *dev)
data->valid = 1;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return data;
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-26 16:18:33 +0300