diff options
| author | Marc Hulsman <m.hulsman@tudelft.nl> | 2008-10-17 17:51:16 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@mahadeva.delvare> | 2008-10-17 17:51:16 +0200 |
| commit | 6e1ecd9b8f1358ed4d099f0c54434240dc40debe (patch) | |
| tree | c8ea5efe96c442de2f82149d3bfc667699c58dae /drivers/hwmon/w83791d.c | |
| parent | a80e8ee66793ec2e7ce27fd0495a7b9c8e0a2a24 (diff) | |
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>
Diffstat (limited to 'drivers/hwmon/w83791d.c')
| -rw-r--r-- | drivers/hwmon/w83791d.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c index de21142d106..6b1cec9950f 100644 --- a/drivers/hwmon/w83791d.c +++ b/drivers/hwmon/w83791d.c @@ -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: |