hwmon: (w83793) VID and VRM handling cleanups
* 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>
diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index ee35af9..ed3c019 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -1024,10 +1024,9 @@
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 @@
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 @@
/* 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 @@
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 @@
}
}
+ /* 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 @@
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 @@
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);