linux-kernel - [PATCH] ARM: zynq: dts: Add SCL & SDA GPIO entries for recovery

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Message-ID: <5eb73d1150648e782795e35c30fccb983b3e0db7.1683035557.git.michal.simek@amd.com>
Date:   Tue, 2 May 2023 15:52:41 +0200
From:   Michal Simek <michal.simek@....com>
To:     <linux-kernel@...r.kernel.org>, <monstr@...str.eu>,
        <michal.simek@...inx.com>, <git@...inx.com>
CC:     Chirag Parekh <chiragp@...inx.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH] ARM: zynq: dts: Add SCL & SDA GPIO entries for recovery

From: Chirag Parekh <chiragp@...inx.com>

Wire i2c pinmuxing gpio recovery for zc702.

Signed-off-by: Chirag Parekh <chiragp@...inx.com>
Signed-off-by: Michal Simek <michal.simek@....com>
---

 arch/arm/boot/dts/zynq-zc702.dts | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/zynq-zc702.dts b/arch/arm/boot/dts/zynq-zc702.dts
index d23201ba8cd7..6efdbca9d3ef 100644
--- a/arch/arm/boot/dts/zynq-zc702.dts
+++ b/arch/arm/boot/dts/zynq-zc702.dts
@@ -5,6 +5,7 @@
  */
 /dts-v1/;
 #include "zynq-7000.dtsi"
+#include <dt-bindings/gpio/gpio.h>
 
 / {
 	model = "Xilinx ZC702 board";
@@ -106,8 +107,11 @@ &gpio0 {
 &i2c0 {
 	status = "okay";
 	clock-frequency = <400000>;
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c0_default>;
+	pinctrl-1 = <&pinctrl_i2c0_gpio>;
+	scl-gpios = <&gpio0 50 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&gpio0 51 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
 
 	i2c-mux@74 {
 		compatible = "nxp,pca9548";
@@ -298,6 +302,19 @@ conf {
 		};
 	};
 
+	pinctrl_i2c0_gpio: i2c0-gpio {
+		mux {
+			groups = "gpio0_50_grp", "gpio0_51_grp";
+			function = "gpio0";
+		};
+
+		conf {
+			groups = "gpio0_50_grp", "gpio0_51_grp";
+			slew-rate = <0>;
+			io-standard = <1>;
+		};
+	};
+
 	pinctrl_sdhci0_default: sdhci0-default {
 		mux {
 			groups = "sdio0_2_grp";
-- 
2.36.1