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From 0339c8c61ca6b54c529f699e7bafd65cda9f3733 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Mon, 16 Oct 2023 09:06:25 +0100
Subject: [PATCH] dts: bcm2712: Set default I2C baudrates to 100kHz
The RP1 I2C interfaces were being left with their default clock rates,
apparently 400kHz.
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
arch/arm/boot/dts/bcm2712-rpi-5-b.dts | 2 ++
arch/arm/boot/dts/bcm2712-rpi.dtsi | 2 ++
2 files changed, 4 insertions(+)
--- a/arch/arm/boot/dts/bcm2712-rpi-5-b.dts
+++ b/arch/arm/boot/dts/bcm2712-rpi-5-b.dts
@@ -250,11 +250,13 @@ i2c0mux: &rp1_gpio {};
i2c_csi_dsi0: &i2c6 { // Note: This is for MIPI0 connector only
pinctrl-0 = <&rp1_i2c6_38_39>;
pinctrl-names = "default";
+ clock-frequency = <100000>;
};
i2c_csi_dsi1: &i2c4 { // Note: This is for MIPI1 connector only
pinctrl-0 = <&rp1_i2c4_40_41>;
pinctrl-names = "default";
+ clock-frequency = <100000>;
};
i2c_csi_dsi: &i2c_csi_dsi1 { }; // An alias for compatibility
--- a/arch/arm/boot/dts/bcm2712-rpi.dtsi
+++ b/arch/arm/boot/dts/bcm2712-rpi.dtsi
@@ -204,11 +204,13 @@ uart4: &rp1_uart4 { };
i2c_vc: &i2c0 { // This is pins 27,28 on the header (not MIPI)
pinctrl-0 = <&rp1_i2c0_0_1>;
pinctrl-names = "default";
+ clock-frequency = <100000>;
};
i2c_arm: &i2c1 {
pinctrl-names = "default";
pinctrl-0 = <&rp1_i2c1_2_3>;
+ clock-frequency = <100000>;
};
&i2c2 {
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