target/linux/bcm27xx/patches-6.1/950-1030-dts-bcm2712-Set-default-I2C-baudrates-to-100kHz.patch

   1 From 0339c8c61ca6b54c529f699e7bafd65cda9f3733 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.com>
   3 Date: Mon, 16 Oct 2023 09:06:25 +0100
   4 Subject: [PATCH] dts: bcm2712: Set default I2C baudrates to 100kHz
   5
   6 The RP1 I2C interfaces were being left with their default clock rates,
   7 apparently 400kHz.
   8
   9 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
  10 ---
  11  arch/arm/boot/dts/bcm2712-rpi-5-b.dts | 2 ++
  12  arch/arm/boot/dts/bcm2712-rpi.dtsi    | 2 ++
  13  2 files changed, 4 insertions(+)
  14
  15 --- a/arch/arm/boot/dts/bcm2712-rpi-5-b.dts
  16 +++ b/arch/arm/boot/dts/bcm2712-rpi-5-b.dts
  17 @@ -250,11 +250,13 @@ i2c0mux: &rp1_gpio {};
  18  i2c_csi_dsi0: &i2c6 { // Note: This is for MIPI0 connector only
  19         pinctrl-0 = <&rp1_i2c6_38_39>;
  20         pinctrl-names = "default";
  21 +       clock-frequency = <100000>;
  22  };
  23
  24  i2c_csi_dsi1: &i2c4 { // Note: This is for MIPI1 connector only
  25         pinctrl-0 = <&rp1_i2c4_40_41>;
  26         pinctrl-names = "default";
  27 +       clock-frequency = <100000>;
  28  };
  29
  30  i2c_csi_dsi: &i2c_csi_dsi1 { }; // An alias for compatibility
  31 --- a/arch/arm/boot/dts/bcm2712-rpi.dtsi
  32 +++ b/arch/arm/boot/dts/bcm2712-rpi.dtsi
  33 @@ -204,11 +204,13 @@ uart4: &rp1_uart4 { };
  34  i2c_vc: &i2c0 {      // This is pins 27,28 on the header (not MIPI)
  35         pinctrl-0 = <&rp1_i2c0_0_1>;
  36         pinctrl-names = "default";
  37 +       clock-frequency = <100000>;
  38  };
  39
  40  i2c_arm: &i2c1 {
  41         pinctrl-names = "default";
  42         pinctrl-0 = <&rp1_i2c1_2_3>;
  43 +       clock-frequency = <100000>;
  44  };
  45
  46  &i2c2 {