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72 lines
2.4 KiB
Diff
72 lines
2.4 KiB
Diff
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From 36faab69e8eebfb7f587bddef96040c59d3daa7c Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Wed, 16 Oct 2024 11:31:04 +0100
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Subject: [PATCH 1324/1350] dts: bcm2712-rpi: Add aliases for the CSI/DSI I2Cs
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Older Pis arrange that the camera I2C ports appear as /dev/i2c-10. Add
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aliases so that on the Pi 5 family, i2c_csi_dsi0 becomes i2c-10 and
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i2c_csi_dsi1 becomes i2c-11. Only the I2C buses that appear on the
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40-pin header, i.e. I2C0 to I2C3, get a low bus number.
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Also add hints for our udev rules about which symlinks to create for
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backwards-compatibility with the previous bus numbers. Note that
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lower numbers have priority, so i2c-0 on CM5 masks i2c-11, forcing
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i2c-11 to be a symlink to i2c-0, not vice versa.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts | 2 ++
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arch/arm64/boot/dts/broadcom/bcm2712-rpi-cm5.dtsi | 2 ++
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arch/arm64/boot/dts/broadcom/bcm2712-rpi.dtsi | 7 +++----
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3 files changed, 7 insertions(+), 4 deletions(-)
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--- a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts
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+++ b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b.dts
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@@ -255,12 +255,14 @@ i2c_csi_dsi0: &i2c6 { // Note: This is f
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pinctrl-0 = <&rp1_i2c6_38_39>;
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pinctrl-names = "default";
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clock-frequency = <100000>;
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+ symlink = "i2c-6";
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};
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i2c_csi_dsi1: &i2c4 { // Note: This is for MIPI1 connector only
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pinctrl-0 = <&rp1_i2c4_40_41>;
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pinctrl-names = "default";
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clock-frequency = <100000>;
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+ symlink = "i2c-4";
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};
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i2c_csi_dsi: &i2c_csi_dsi1 { }; // An alias for compatibility
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--- a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-cm5.dtsi
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+++ b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-cm5.dtsi
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@@ -238,9 +238,11 @@ i2c_csi_dsi0: &i2c6 { // Note: This is f
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pinctrl-0 = <&rp1_i2c6_38_39>;
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pinctrl-names = "default";
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clock-frequency = <100000>;
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+ symlink = "i2c-6";
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};
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i2c_csi_dsi1: &i2c0 { // Note: This is for MIPI1 connector
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+ symlink = "i2c-11";
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};
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i2c_csi_dsi: &i2c_csi_dsi1 { }; // An alias for compatibility
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--- a/arch/arm64/boot/dts/broadcom/bcm2712-rpi.dtsi
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+++ b/arch/arm64/boot/dts/broadcom/bcm2712-rpi.dtsi
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@@ -117,12 +117,11 @@
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i2c = &i2c_arm;
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i2c0 = &i2c0;
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i2c1 = &i2c1;
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- i2c10 = &i2c_rp1boot;
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i2c2 = &i2c2;
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i2c3 = &i2c3;
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- i2c4 = &i2c4;
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- i2c5 = &i2c5;
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- i2c6 = &i2c6;
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+ i2c10 = &i2c_csi_dsi0;
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+ i2c11 = &i2c_csi_dsi1;
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+ i2c12 = &i2c_rp1boot;
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mailbox = &mailbox;
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mmc0 = &sdio1;
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serial0 = &uart0;
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