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platform/x86: x86-android-tablets: Add swnode for Xiaomi pad2 indicator LED

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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 adds a description for this RGB LED controller and also sets
a trigger to indicate the charging event (bq27520-0-charging). When it
is charging, the indicator LED will be turned on.

Signed-off-by: Kate Hsuan <hpa@redhat.com>
Link: https://lore.kernel.org/r/20240322033736.9344-2-hpa@redhat.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Kate Hsuan 2024-03-22 11:37:31 +08:00 committed by Hans de Goede
parent fe7af61159
commit fcc6220ddc
1 changed files with 82 additions and 0 deletions
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82
drivers/platform/x86/x86-android-tablets/other.c
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@ -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,
};