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asus-wmi: add hwmon interface and pwm1 

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Corentin Chary 2011-02-26 10:20:42 +01:00 committed by Matthew Garrett
parent 2f686b54fb
commit e07babde13
2 changed files with 129 additions and 0 deletions
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1
drivers/platform/x86/Kconfig
View File

@ -458,6 +458,7 @@ config ASUS_WMI
tristate "ASUS WMI Driver (EXPERIMENTAL)"
depends on ACPI_WMI
depends on INPUT
depends on HWMON
depends on EXPERIMENTAL
depends on BACKLIGHT_CLASS_DEVICE
depends on RFKILL || RFKILL = n

128
drivers/platform/x86/asus-wmi.c
View File

@ -39,6 +39,8 @@
#include <linux/rfkill.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/platform_device.h>
@ -167,6 +169,7 @@ struct asus_wmi {
struct input_dev *inputdev;
struct backlight_device *backlight_device;
struct device *hwmon_device;
struct platform_device *platform_device;
struct led_classdev tpd_led;
@ -790,6 +793,124 @@ exit:
return result;
}
/*
* Hwmon device
*/
static ssize_t asus_hwmon_pwm1(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct asus_wmi *asus = dev_get_drvdata(dev);
u32 value;
int err;
err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
if (err < 0)
return err;
value |= 0xFF;
if (value == 1) /* Low Speed */
value = 85;
else if (value == 2)
value = 170;
else if (value == 3)
value = 255;
else if (value != 0) {
pr_err("Unknown fan speed %#x", value);
value = -1;
}
return sprintf(buf, "%d\n", value);
}
static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL, 0);
static ssize_t
show_name(struct device *dev, struct device_attribute *attr, char *buf)
{
return sprintf(buf, "asus\n");
}
static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
static struct attribute *hwmon_attributes[] = {
&sensor_dev_attr_pwm1.dev_attr.attr,
&sensor_dev_attr_name.dev_attr.attr,
NULL
};
static mode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
struct attribute *attr, int idx)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct platform_device *pdev = to_platform_device(dev->parent);
struct asus_wmi *asus = platform_get_drvdata(pdev);
bool ok = true;
int dev_id = -1;
u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
if (attr == &sensor_dev_attr_pwm1.dev_attr.attr)
dev_id = ASUS_WMI_DEVID_FAN_CTRL;
if (dev_id != -1) {
int err = asus_wmi_get_devstate(asus, dev_id, &value);
if (err < 0)
return err;
}
if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
/*
* We need to find a better way, probably using sfun,
* bits or spec ...
* Currently we disable it if:
* - ASUS_WMI_UNSUPPORTED_METHOD is returned
* - reverved bits are non-zero
* - sfun and presence bit are not set
*/
if (value != ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
|| (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
ok = false;
}
return ok ? attr->mode : 0;
}
static struct attribute_group hwmon_attribute_group = {
.is_visible = asus_hwmon_sysfs_is_visible,
.attrs = hwmon_attributes
};
static void asus_wmi_hwmon_exit(struct asus_wmi *asus)
{
struct device *hwmon;
hwmon = asus->hwmon_device;
if (!hwmon)
return;
sysfs_remove_group(&hwmon->kobj, &hwmon_attribute_group);
hwmon_device_unregister(hwmon);
asus->hwmon_device = NULL;
}
static int asus_wmi_hwmon_init(struct asus_wmi *asus)
{
struct device *hwmon;
int result;
hwmon = hwmon_device_register(&asus->platform_device->dev);
if (IS_ERR(hwmon)) {
pr_err("Could not register asus hwmon device\n");
return PTR_ERR(hwmon);
}
asus->hwmon_device = hwmon;
result = sysfs_create_group(&hwmon->kobj, &hwmon_attribute_group);
if (result)
asus_wmi_hwmon_exit(asus);
return result;
}
/*
* Backlight
*/
@ -1331,6 +1452,10 @@ static int asus_wmi_add(struct platform_device *pdev)
if (err)
goto fail_input;
err = asus_wmi_hwmon_init(asus);
if (err)
goto fail_hwmon;
err = asus_wmi_led_init(asus);
if (err)
goto fail_leds;
@ -1369,6 +1494,8 @@ fail_backlight:
fail_rfkill:
asus_wmi_led_exit(asus);
fail_leds:
asus_wmi_hwmon_exit(asus);
fail_hwmon:
asus_wmi_input_exit(asus);
fail_input:
asus_wmi_platform_exit(asus);
@ -1385,6 +1512,7 @@ static int asus_wmi_remove(struct platform_device *device)
wmi_remove_notify_handler(asus->driver->event_guid);
asus_wmi_backlight_exit(asus);
asus_wmi_input_exit(asus);
asus_wmi_hwmon_exit(asus);
asus_wmi_led_exit(asus);
asus_wmi_rfkill_exit(asus);
asus_wmi_debugfs_exit(asus);