Commit 77ee9d29 authored by Luke D. Jones's avatar Luke D. Jones Committed by Hans de Goede
Browse files

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



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

Signed-off-by: default avatarLuke D. Jones <luke@ljones.dev>
Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230630053552.976579-2-luke@ljones.dev


Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent 9204fc50

Documentation/ABI/testing/sysfs-platform-asus-wmi

+10 −0
Original line number Diff line number Diff line
@@ -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
 
 No newline at end of file

drivers/platform/x86/asus-wmi.c

+21 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/platform_data/x86/asus-wmi.h

+3 −0
Original line number Diff line number Diff line
@@ -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