linux-kernel - Re: [PATCH v2 1/8] platform/x86: asus-wmi: add support for showing charger mode

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Message-ID: <3356d7b0-08fa-1b15-ef03-35781fc899c0@redhat.com>
Date:   Tue, 4 Jul 2023 13:33:35 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     "Luke D. Jones" <luke@...nes.dev>
Cc:     corentin.chary@...il.com, acpi4asus-user@...ts.sourceforge.net,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-hwmon@...r.kernel.org, markgross@...nel.org,
        jdelvare@...e.com, linux@...ck-us.net
Subject: Re: [PATCH v2 1/8] platform/x86: asus-wmi: add support for showing
 charger mode

Hi,

On 6/30/23 07:35, Luke D. Jones wrote:
> Expose a WMI method in sysfs platform for showing which connected
> charger the laptop is currently using.
> 
> Signed-off-by: Luke D. Jones <luke@...nes.dev>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@...hat.com>

Regards,

Hans


> ---
>  .../ABI/testing/sysfs-platform-asus-wmi       | 10 +++++++++
>  drivers/platform/x86/asus-wmi.c               | 21 +++++++++++++++++++
>  include/linux/platform_data/x86/asus-wmi.h    |  3 +++
>  3 files changed, 34 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-platform-asus-wmi b/Documentation/ABI/testing/sysfs-platform-asus-wmi
> index a77a004a1baa..eb29e3023c7b 100644
> --- a/Documentation/ABI/testing/sysfs-platform-asus-wmi
> +++ b/Documentation/ABI/testing/sysfs-platform-asus-wmi
> @@ -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@...nes.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
> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
> index 1038dfdcdd32..f23375d5fb82 100644
> --- a/drivers/platform/x86/asus-wmi.c
> +++ b/drivers/platform/x86/asus-wmi.c
> @@ -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);
> diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
> index 28234dc9fa6a..f90cafe26af1 100644
> --- a/include/linux/platform_data/x86/asus-wmi.h
> +++ b/include/linux/platform_data/x86/asus-wmi.h
> @@ -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
>