linux-kernel - [RFC 2/2] ARM: dts: imx6dl-yapp4: Fix lp5562 driver probe

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Date:   Fri, 14 May 2021 16:44:37 +0200
From:   Michal Vokáč <michal.vokac@...ft.com>
To:     Pavel Machek <pavel@....cz>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>
Cc:     Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        linux-kernel@...r.kernel.org, linux-leds@...r.kernel.org,
        Michal Vokáč <michal.vokac@...ft.com>,
        stable@...r.kernel.org
Subject: [RFC 2/2] ARM: dts: imx6dl-yapp4: Fix lp5562 driver probe

Since the LED multicolor framework support was added in commit
92a81562e695 ("leds: lp55xx: Add multicolor framework support to lp55xx")
LEDs on this platform stopped working.

Author of the framework attempted to accommodate this DT to the
framework in commit b86d3d21cd4c ("ARM: dts: imx6dl-yapp4: Add reg property
to the lp5562 channel node") but that is not sufficient. A color property
is now required even if the multicolor framework is not used, otherwise
the driver probe fails:

  lp5562: probe of 1-0030 failed with error -22

Add the color property to fix this and remove the actually unused white
channel.

Fixes: b86d3d21cd4c ("ARM: dts: imx6dl-yapp4: Add reg property to the lp5562 channel node")
Cc: <stable@...r.kernel.org>
Cc: Pavel Machek <pavel@....cz>
Cc: Jacek Anaszewski <jacek.anaszewski@...il.com>
Cc: linux-leds@...r.kernel.org
Signed-off-by: Michal Vokáč <michal.vokac@...ft.com>
---
 arch/arm/boot/dts/imx6dl-yapp4-common.dtsi | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
index 7d2c72562c73..3107bf7fbce5 100644
--- a/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
+++ b/arch/arm/boot/dts/imx6dl-yapp4-common.dtsi
@@ -5,6 +5,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
 #include <dt-bindings/pwm/pwm.h>
 
 / {
@@ -271,6 +272,7 @@
 			led-cur = /bits/ 8 <0x20>;
 			max-cur = /bits/ 8 <0x60>;
 			reg = <0>;
+			color = <LED_COLOR_ID_RED>;
 		};
 
 		chan@1 {
@@ -278,6 +280,7 @@
 			led-cur = /bits/ 8 <0x20>;
 			max-cur = /bits/ 8 <0x60>;
 			reg = <1>;
+			color = <LED_COLOR_ID_GREEN>;
 		};
 
 		chan@2 {
@@ -285,13 +288,7 @@
 			led-cur = /bits/ 8 <0x20>;
 			max-cur = /bits/ 8 <0x60>;
 			reg = <2>;
-		};
-
-		chan@3 {
-			chan-name = "W";
-			led-cur = /bits/ 8 <0x0>;
-			max-cur = /bits/ 8 <0x0>;
-			reg = <3>;
+			color = <LED_COLOR_ID_BLUE>;
 		};
 	};
 
-- 
2.7.4