linux-kernel - [PATCH v3 4/4] mfd: cros_ec: Register keyboard backlight subdevice

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Message-Id: <20240526-cros_ec-kbd-led-framework-v3-4-ee577415a521@weissschuh.net>
Date: Sun, 26 May 2024 20:17:18 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Lee Jones <lee@...nel.org>, Benson Leung <bleung@...omium.org>, 
 Guenter Roeck <groeck@...omium.org>, Tzung-Bi Shih <tzungbi@...nel.org>, 
 Pavel Machek <pavel@....cz>
Cc: chrome-platform@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 Dustin Howett <dustin@...ett.net>, 
 Mario Limonciello <mario.limonciello@....com>, linux-leds@...r.kernel.org, 
 Rajas Paranjpe <paranjperajas@...il.com>, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH v3 4/4] mfd: cros_ec: Register keyboard backlight subdevice

Load cros_kbd_led_backlight when the EC reports EC_FEATURE_PWM_KEYB.
This makes cros_kbd_led_backlight work on machines without specific
ACPI or OF support for the keyboard backlight.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 drivers/mfd/cros_ec_dev.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
index a52d59cc2b1e..4444b361aeae 100644
--- a/drivers/mfd/cros_ec_dev.c
+++ b/drivers/mfd/cros_ec_dev.c
@@ -99,6 +99,10 @@ static const struct mfd_cell cros_ec_wdt_cells[] = {
 	{ .name = "cros-ec-wdt", }
 };
 
+static const struct mfd_cell cros_ec_keyboard_leds_cells[] = {
+	{ .name = "cros-keyboard-leds", },
+};
+
 static const struct cros_feature_to_cells cros_subdevices[] = {
 	{
 		.id		= EC_FEATURE_CEC,
@@ -125,6 +129,11 @@ static const struct cros_feature_to_cells cros_subdevices[] = {
 		.mfd_cells	= cros_ec_wdt_cells,
 		.num_cells	= ARRAY_SIZE(cros_ec_wdt_cells),
 	},
+	{
+		.id		= EC_FEATURE_PWM_KEYB,
+		.mfd_cells	= cros_ec_keyboard_leds_cells,
+		.num_cells	= ARRAY_SIZE(cros_ec_keyboard_leds_cells),
+	},
 };
 
 static const struct mfd_cell cros_ec_platform_cells[] = {

-- 
2.45.1