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hwmon: (w83793) VID and VRM handling cleanups

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* Rework the device initialization function so as to read the
"Multi-Function Pin Control" register (0x58) once instead of twice.
I2C transactions aren't cheap so this speeds up the driver loading.

* Only create the "vrm" attribute if at least one VID value is
available.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Gong Jun <jgong@winbond.com>
Acked-by: Rudolf Marek <r.marek@assembler.cz>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
This commit is contained in:
Jean Delvare 2008-02-12 11:25:07 +01:00 committed by Mark M. Hoffman
parent 4040c415f5
commit 93c75a4ac2
1 changed files with 14 additions and 12 deletions
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26
drivers/hwmon/w83793.c
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@ -1024,10 +1024,9 @@ static struct sensor_device_attribute_2 w83793_vid[] = {
SENSOR_ATTR_2(cpu0_vid, S_IRUGO, show_vid, NULL, NOT_USED, 0),
SENSOR_ATTR_2(cpu1_vid, S_IRUGO, show_vid, NULL, NOT_USED, 1),
};
static DEVICE_ATTR(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm);
static struct sensor_device_attribute_2 sda_single_files[] = {
SENSOR_ATTR_2(vrm, S_IWUSR | S_IRUGO, show_vrm, store_vrm,
NOT_USED, NOT_USED),
SENSOR_ATTR_2(chassis, S_IWUSR | S_IRUGO, show_alarm_beep,
store_chassis_clear, ALARM_STATUS, 30),
SENSOR_ATTR_2(beep_enable, S_IWUSR | S_IRUGO, show_beep_enable,
@ -1080,6 +1079,7 @@ static int w83793_detach_client(struct i2c_client *client)
for (i = 0; i < ARRAY_SIZE(w83793_vid); i++)
device_remove_file(dev, &w83793_vid[i].dev_attr);
device_remove_file(dev, &dev_attr_vrm);
for (i = 0; i < ARRAY_SIZE(w83793_left_fan); i++)
device_remove_file(dev, &w83793_left_fan[i].dev_attr);
@ -1282,7 +1282,6 @@ static int w83793_detect(struct i2c_adapter *adapter, int address, int kind)
/* Initialize the chip */
w83793_init_client(client);
data->vrm = vid_which_vrm();
/*
Only fan 1-5 has their own input pins,
Pwm 1-3 has their own pins
@ -1293,7 +1292,9 @@ static int w83793_detect(struct i2c_adapter *adapter, int address, int kind)
val = w83793_read_value(client, W83793_REG_FANIN_CTRL);
/* check the function of pins 49-56 */
if (!(tmp & 0x80)) {
if (tmp & 0x80) {
data->has_vid |= 0x2; /* has VIDB */
} else {
data->has_pwm |= 0x18; /* pwm 4,5 */
if (val & 0x01) { /* fan 6 */
data->has_fan |= 0x20;
@ -1309,13 +1310,15 @@ static int w83793_detect(struct i2c_adapter *adapter, int address, int kind)
}
}
/* check the function of pins 37-40 */
if (!(tmp & 0x29))
data->has_vid |= 0x1; /* has VIDA */
if (0x08 == (tmp & 0x0c)) {
if (val & 0x08) /* fan 9 */
data->has_fan |= 0x100;
if (val & 0x10) /* fan 10 */
data->has_fan |= 0x200;
}
if (0x20 == (tmp & 0x30)) {
if (val & 0x20) /* fan 11 */
data->has_fan |= 0x400;
@ -1359,13 +1362,6 @@ static int w83793_detect(struct i2c_adapter *adapter, int address, int kind)
if (tmp & 0x02)
data->has_temp |= 0x20;
/* Detect the VID usage and ignore unused input */
tmp = w83793_read_value(client, W83793_REG_MFC);
if (!(tmp & 0x29))
data->has_vid |= 0x1; /* has VIDA */
if (tmp & 0x80)
data->has_vid |= 0x2; /* has VIDB */
/* Register sysfs hooks */
for (i = 0; i < ARRAY_SIZE(w83793_sensor_attr_2); i++) {
err = device_create_file(dev,
@ -1381,6 +1377,12 @@ static int w83793_detect(struct i2c_adapter *adapter, int address, int kind)
if (err)
goto exit_remove;
}
if (data->has_vid) {
data->vrm = vid_which_vrm();
err = device_create_file(dev, &dev_attr_vrm);
if (err)
goto exit_remove;
}
for (i = 0; i < ARRAY_SIZE(sda_single_files); i++) {
err = device_create_file(dev, &sda_single_files[i].dev_attr);