Re: [PATCH v5 1/6] platform: x86-android-tablets: other: Add swnode for Xiaomi pad2 indicator LED

From: Hans de Goede <hdegoede@redhat.com>
To: "Kate Hsuan" <hpa@redhat.com>, "Pavel Machek" <pavel@ucw.cz>,
	"Lee Jones" <lee@kernel.org>,
	linux-leds@vger.kernel.org, platform-driver-x86@vger.kernel.org,
	"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
	"André Apitzsch" <git@apitzsch.eu>,
	linux-kernel@vger.kernel.org,
	"Sebastian Reichel" <sre@kernel.org>,
	linux-pm@vger.kernel.org
Subject: Re: [PATCH v5 1/6] platform: x86-android-tablets: other: Add swnode for Xiaomi pad2 indicator LED
Date: Mon, 25 Mar 2024 16:02:54 +0100	[thread overview]
Message-ID: <bb7536be-9bed-4557-b111-6409ebfe48f4@redhat.com> (raw)
In-Reply-To: <20240322033736.9344-2-hpa@redhat.com>

Hi Kate,

On 3/22/24 4:37 AM, Kate Hsuan wrote:
> There is a KTD2026 LED controller to manage the indicator LED for Xiaomi
> pad2. The ACPI for it is not properly made so the kernel can't get
> a correct description of it.
> 
> This work add a description for this RGB LED controller and also set a
> trigger to indicate the chaging event (bq27520-0-charging). When it is
> charging, the indicator LED will be turn on.
> 
> Signed-off-by: Kate Hsuan <hpa@redhat.com>

Thank you for your patch, I've applied this patch to my review-hans 
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

I will also merge [PATCH v5 6/6] platform: x86-android-tablets:
others: Set the LED trigger to charging_red_full_green for Xiaomi pad2"

Once the new power_supply trigger patch this relies on has been
accepted.

Once I've run some tests on this branch the patches there will be
added to the platform-drivers-x86/for-next branch and eventually
will be included in the pdx86 pull-request to Linus for the next
merge-window.

Regards,

Hans

> ---
>  .../platform/x86/x86-android-tablets/other.c  | 82 +++++++++++++++++++
>  .../x86/x86-android-tablets/shared-psy-info.h |  2 +
>  2 files changed, 84 insertions(+)
> 
> diff --git a/drivers/platform/x86/x86-android-tablets/other.c b/drivers/platform/x86/x86-android-tablets/other.c
> index bc6bbf7ec6ea..1012a158f7b7 100644
> --- a/drivers/platform/x86/x86-android-tablets/other.c
> +++ b/drivers/platform/x86/x86-android-tablets/other.c
> @@ -13,6 +13,8 @@
>  #include <linux/input.h>
>  #include <linux/platform_device.h>
>  
> +#include <dt-bindings/leds/common.h>
> +
>  #include "shared-psy-info.h"
>  #include "x86-android-tablets.h"
>  
> @@ -593,6 +595,83 @@ const struct x86_dev_info whitelabel_tm800a550l_info __initconst = {
>  	.gpiod_lookup_tables = whitelabel_tm800a550l_gpios,
>  };
>  
> +/*
> + * The fwnode for ktd2026 on Xaomi pad2. It composed of a RGB LED node
> + * with three subnodes for each color (B/G/R). The RGB LED node is named
> + * "multi-led" to align with the name in the device tree.
> + */
> +
> +/* main fwnode for ktd2026 */
> +static const struct software_node ktd2026_node = {
> +	.name = "ktd2026"
> +};
> +
> +static const struct property_entry ktd2026_rgb_led_props[] = {
> +	PROPERTY_ENTRY_U32("reg", 0),
> +	PROPERTY_ENTRY_U32("color", LED_COLOR_ID_RGB),
> +	PROPERTY_ENTRY_STRING("function", "indicator"),
> +	PROPERTY_ENTRY_STRING("linux,default-trigger", "bq27520-0-charging"),
> +	{ }
> +};
> +
> +static const struct software_node ktd2026_rgb_led_node = {
> +	.name = "multi-led",
> +	.properties = ktd2026_rgb_led_props,
> +	.parent = &ktd2026_node,
> +};
> +
> +static const struct property_entry ktd2026_blue_led_props[] = {
> +	PROPERTY_ENTRY_U32("reg", 0),
> +	PROPERTY_ENTRY_U32("color", LED_COLOR_ID_BLUE),
> +	{ }
> +};
> +
> +static const struct software_node ktd2026_blue_led_node = {
> +	.properties = ktd2026_blue_led_props,
> +	.parent = &ktd2026_rgb_led_node,
> +};
> +
> +static const struct property_entry ktd2026_green_led_props[] = {
> +	PROPERTY_ENTRY_U32("reg", 1),
> +	PROPERTY_ENTRY_U32("color", LED_COLOR_ID_GREEN),
> +	{ }
> +};
> +
> +static const struct software_node ktd2026_green_led_node = {
> +	.properties = ktd2026_green_led_props,
> +	.parent = &ktd2026_rgb_led_node,
> +};
> +
> +static const struct property_entry ktd2026_red_led_props[] = {
> +	PROPERTY_ENTRY_U32("reg", 2),
> +	PROPERTY_ENTRY_U32("color", LED_COLOR_ID_RED),
> +	{ }
> +};
> +
> +static const struct software_node ktd2026_red_led_node = {
> +	.properties = ktd2026_red_led_props,
> +	.parent = &ktd2026_rgb_led_node,
> +};
> +
> +static const struct software_node *ktd2026_node_group[] = {
> +	&ktd2026_node,
> +	&ktd2026_rgb_led_node,
> +	&ktd2026_green_led_node,
> +	&ktd2026_blue_led_node,
> +	&ktd2026_red_led_node,
> +	NULL
> +};
> +
> +static int __init xiaomi_mipad2_init(void)
> +{
> +	return software_node_register_node_group(ktd2026_node_group);
> +}
> +
> +static void xiaomi_mipad2_exit(void)
> +{
> +	software_node_unregister_node_group(ktd2026_node_group);
> +}
> +
>  /*
>   * If the EFI bootloader is not Xiaomi's own signed Android loader, then the
>   * Xiaomi Mi Pad 2 X86 tablet sets OSID in the DSDT to 1 (Windows), causing
> @@ -616,6 +695,7 @@ static const struct x86_i2c_client_info xiaomi_mipad2_i2c_clients[] __initconst
>  			.type = "ktd2026",
>  			.addr = 0x30,
>  			.dev_name = "ktd2026",
> +			.swnode = &ktd2026_node,
>  		},
>  		.adapter_path = "\\_SB_.PCI0.I2C3",
>  	},
> @@ -624,4 +704,6 @@ static const struct x86_i2c_client_info xiaomi_mipad2_i2c_clients[] __initconst
>  const struct x86_dev_info xiaomi_mipad2_info __initconst = {
>  	.i2c_client_info = xiaomi_mipad2_i2c_clients,
>  	.i2c_client_count = ARRAY_SIZE(xiaomi_mipad2_i2c_clients),
> +	.init = xiaomi_mipad2_init,
> +	.exit = xiaomi_mipad2_exit,
>  };
> diff --git a/drivers/platform/x86/x86-android-tablets/shared-psy-info.h b/drivers/platform/x86/x86-android-tablets/shared-psy-info.h
> index c2d2968cddc2..8c33ec47ee12 100644
> --- a/drivers/platform/x86/x86-android-tablets/shared-psy-info.h
> +++ b/drivers/platform/x86/x86-android-tablets/shared-psy-info.h
> @@ -29,4 +29,6 @@ extern const char * const bq24190_modules[];
>  extern const struct platform_device_info int3496_pdevs[];
>  extern struct gpiod_lookup_table int3496_reference_gpios;
>  
> +extern const struct software_node ktd2026_leds_node;
> +
>  #endif