The KTD2026 LED controller manages the indicator LED for Xiaomi pad2. This work added a description for this RGB LED controller and also set 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@xxxxxxxxxx> --- .../platform/x86/x86-android-tablets/other.c | 85 +++++++++++++++++++ .../x86/x86-android-tablets/shared-psy-info.h | 2 + 2 files changed, 87 insertions(+) diff --git a/drivers/platform/x86/x86-android-tablets/other.c b/drivers/platform/x86/x86-android-tablets/other.c index bc6bbf7ec6ea..542ef6667b7b 100644 --- a/drivers/platform/x86/x86-android-tablets/other.c +++ b/drivers/platform/x86/x86-android-tablets/other.c @@ -12,6 +12,7 @@ #include <linux/gpio/machine.h> #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 +594,87 @@ 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 = { +}; + +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, +}; + +/* B */ +static const struct property_entry ktd2026_red_led_props[] = { + PROPERTY_ENTRY_U32("reg", 0), + PROPERTY_ENTRY_U32("color", LED_COLOR_ID_BLUE), + { } +}; + +static const struct software_node ktd2026_red_led_node = { + .properties = ktd2026_red_led_props, + .parent = &ktd2026_rgb_led_node, +}; + +/* G */ +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, +}; + +/* R */ +static const struct property_entry ktd2026_blue_led_props[] = { + PROPERTY_ENTRY_U32("reg", 2), + PROPERTY_ENTRY_U32("color", LED_COLOR_ID_RED), + { } +}; + +static const struct software_node ktd2026_blue_led_node = { + .properties = ktd2026_blue_led_props, + .parent = &ktd2026_rgb_led_node, +}; + +static const struct software_node *ktd2026_node_group[] = { + &ktd2026_node, + &ktd2026_rgb_led_node, + &ktd2026_red_led_node, + &ktd2026_green_led_node, + &ktd2026_blue_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 +698,7 @@ 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 +707,6 @@ 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 -- 2.43.0