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platform/x86: asus-wmi: add support for showing charger mode

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Expose a WMI method in sysfs platform for showing which connected
charger the laptop is currently using.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230630053552.976579-2-luke@ljones.dev
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Luke D. Jones 2023-06-30 17:35:45 +12:00 committed by Hans de Goede
parent 9204fc5071
commit 77ee9d299e
3 changed files with 34 additions and 0 deletions
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10
Documentation/ABI/testing/sysfs-platform-asus-wmi
View File

@ -98,3 +98,13 @@ Description:
Enable an LCD response-time boost to reduce or remove ghosting:
* 0 - Disable,
* 1 - Enable
What: /sys/devices/platform/<platform>/charge_mode
Date: Jun 2023
KernelVersion: 6.5
Contact: "Luke Jones" <luke@ljones.dev>
Description:
Get the current charging mode being used:
* 1 - Barrel connected charger,
* 2 - USB-C charging
* 3 - Both connected, barrel used for charging

21
drivers/platform/x86/asus-wmi.c
View File

@ -237,6 +237,7 @@ struct asus_wmi {
u8 fan_boost_mode_mask;
u8 fan_boost_mode;
bool charge_mode_available;
bool egpu_enable_available;
bool dgpu_disable_available;
bool gpu_mux_mode_available;
@ -586,6 +587,22 @@ static void asus_wmi_tablet_mode_get_state(struct asus_wmi *asus)
asus_wmi_tablet_sw_report(asus, result);
}
/* Charging mode, 1=Barrel, 2=USB ******************************************/
static ssize_t charge_mode_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct asus_wmi *asus = dev_get_drvdata(dev);
int result, value;
result = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_CHARGE_MODE, &value);
if (result < 0)
return result;
return sysfs_emit(buf, "%d\n", value & 0xff);
}
static DEVICE_ATTR_RO(charge_mode);
/* dGPU ********************************************************************/
static ssize_t dgpu_disable_show(struct device *dev,
struct device_attribute *attr, char *buf)
@ -3462,6 +3479,7 @@ static struct attribute *platform_attributes[] = {
&dev_attr_camera.attr,
&dev_attr_cardr.attr,
&dev_attr_touchpad.attr,
&dev_attr_charge_mode.attr,
&dev_attr_egpu_enable.attr,
&dev_attr_dgpu_disable.attr,
&dev_attr_gpu_mux_mode.attr,
@ -3491,6 +3509,8 @@ static umode_t asus_sysfs_is_visible(struct kobject *kobj,
devid = ASUS_WMI_DEVID_LID_RESUME;
else if (attr == &dev_attr_als_enable.attr)
devid = ASUS_WMI_DEVID_ALS_ENABLE;
else if (attr == &dev_attr_charge_mode.attr)
ok = asus->charge_mode_available;
else if (attr == &dev_attr_egpu_enable.attr)
ok = asus->egpu_enable_available;
else if (attr == &dev_attr_dgpu_disable.attr)
@ -3757,6 +3777,7 @@ static int asus_wmi_add(struct platform_device *pdev)
if (err)
goto fail_platform;
asus->charge_mode_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_CHARGE_MODE);
asus->egpu_enable_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_EGPU);
asus->dgpu_disable_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_DGPU);
asus->gpu_mux_mode_available = asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_GPU_MUX);

3
include/linux/platform_data/x86/asus-wmi.h
View File

@ -95,6 +95,9 @@
/* Keyboard dock */
#define ASUS_WMI_DEVID_KBD_DOCK 0x00120063
/* Charging mode - 1=Barrel, 2=USB */
#define ASUS_WMI_DEVID_CHARGE_MODE 0x0012006C
/* dgpu on/off */
#define ASUS_WMI_DEVID_EGPU 0x00090019