linux-kernel - [PATCH 1/4] arm64: dts: beacon-renesom: Fix gpio expander reference

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Date:   Wed,  4 Jan 2023 08:12:42 -0600
From:   Adam Ford <aford173@...il.com>
To:     linux-renesas-soc@...r.kernel.org
Cc:     aford@...conembedded.com, Adam Ford <aford173@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] arm64: dts: beacon-renesom: Fix gpio expander reference

The board used to originally introduce the Beacon Embedded
RZ/G2[M/N/H] boards had a GPIO expander with address 20, but
this was change when the final board went to production.

The production boards changed both the part itself and
the address.  With the incorrect address, the LCD cannot
come up.  If the LCD fails, the rcar-du driver fails to come up,
and that also breaks HDMI.

Pre-release board were not shipped to the general public, so it
should be safe to push this as a fix.  Anyone with a production
board would have video fail due to this GPIO expander change.

Fixes: a1d8a344f1ca ("arm64: dts: renesas: Introduce r8a774a1-beacon-rzg2m-kit")
Signed-off-by: Adam Ford <aford173@...il.com>

diff --git a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
index 8166e3c1ff4e..8b6fe235a8f0 100644
--- a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
+++ b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi
@@ -437,20 +437,6 @@ wm8962_endpoint: endpoint {
 		};
 	};
 
-	/* 0 - lcd_reset */
-	/* 1 - lcd_pwr */
-	/* 2 - lcd_select */
-	/* 3 - backlight-enable */
-	/* 4 - Touch_shdwn */
-	/* 5 - LCD_H_pol */
-	/* 6 - lcd_V_pol */
-	gpio_exp1: gpio@20 {
-		compatible = "onnn,pca9654";
-		reg = <0x20>;
-		gpio-controller;
-		#gpio-cells = <2>;
-	};
-
 	touchscreen@26 {
 		compatible = "ilitek,ili2117";
 		reg = <0x26>;
@@ -482,6 +468,21 @@ hd3ss3220_out_ep: endpoint {
 			};
 		};
 	};
+
+	gpio_exp1: gpio@70 {
+		compatible = "onnn,pca9654";
+		reg = <0x70>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names =
+			"lcd_reset",
+			"lcd_pwr",
+			"lcd_select",
+			"backlight-enable",
+			"Touch_shdwn",
+			"LCD_H_pol",
+			"lcd_V_pol";
+	};
 };
 
 &lvds0 {
-- 
2.34.1