mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

hwmon: (w83791d) fan 4/5 pins can also be used for gpio 

Pins fan/pwm 4-5 can be in use as GPIO. If that is the case, do not
create their sysfs-interface. 

Signed-off-by: Marc Hulsman <m.hulsman@tudelft.nl>
Acked-by: Hans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Marc Hulsman 2008-10-17 17:51:16 +02:00 committed by Jean Delvare
parent a80e8ee667
commit 6e1ecd9b8f
1 changed files with 27 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/hwmon/w83791d.c
View File

@ -160,6 +160,7 @@ static const u8 W83791D_REG_BEEP_CTRL[3] = {
0xA3, /* BEEP Control Register 3 */
};
#define W83791D_REG_GPIO 0x15
#define W83791D_REG_CONFIG 0x40
#define W83791D_REG_VID_FANDIV 0x47
#define W83791D_REG_DID_VID4 0x49
@ -908,8 +909,6 @@ static struct attribute *w83791d_attributes[] = {
FAN_UNIT_ATTRS(0),
FAN_UNIT_ATTRS(1),
FAN_UNIT_ATTRS(2),
FAN_UNIT_ATTRS(3),
FAN_UNIT_ATTRS(4),
TEMP_UNIT_ATTRS(0),
TEMP_UNIT_ATTRS(1),
TEMP_UNIT_ATTRS(2),
@ -925,6 +924,18 @@ static const struct attribute_group w83791d_group = {
.attrs = w83791d_attributes,
};
/* Separate group of attributes for fan/pwm 4-5. Their pins can also be
in use for GPIO in which case their sysfs-interface should not be made
available */
static struct attribute *w83791d_attributes_fanpwm45[] = {
FAN_UNIT_ATTRS(3),
FAN_UNIT_ATTRS(4),
NULL
};
static const struct attribute_group w83791d_group_fanpwm45 = {
.attrs = w83791d_attributes_fanpwm45,
};
static int w83791d_detect_subclients(struct i2c_client *client)
{
@ -1056,6 +1067,7 @@ static int w83791d_probe(struct i2c_client *client,
struct w83791d_data *data;
struct device *dev = &client->dev;
int i, err;
u8 has_fanpwm45;
#ifdef DEBUG
int val1;
@ -1090,15 +1102,27 @@ static int w83791d_probe(struct i2c_client *client,
if ((err = sysfs_create_group(&client->dev.kobj, &w83791d_group)))
goto error3;
/* Check if pins of fan/pwm 4-5 are in use as GPIO */
has_fanpwm45 = w83791d_read(client, W83791D_REG_GPIO) & 0x10;
if (has_fanpwm45) {
err = sysfs_create_group(&client->dev.kobj,
&w83791d_group_fanpwm45);
if (err)
goto error4;
}
/* Everything is ready, now register the working device */
data->hwmon_dev = hwmon_device_register(dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto error4;
goto error5;
}
return 0;
error5:
if (has_fanpwm45)
sysfs_remove_group(&client->dev.kobj, &w83791d_group_fanpwm45);
error4:
sysfs_remove_group(&client->dev.kobj, &w83791d_group);
error3: