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117 lines
3.1 KiB
Diff
117 lines
3.1 KiB
Diff
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From 911dedf3f51adf8cfd6554af1c89c922c4453889 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Mon, 24 Apr 2023 16:27:57 +0100
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Subject: [PATCH] dtoverlays: Add overrides for alternate i2c buses to
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i2c-mux
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The i2c-mux overlay was fixed to i2c-1. Add overrides to allow
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it to be assigned to alternate buses.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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arch/arm/boot/dts/overlays/README | 16 ++++++++
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.../arm/boot/dts/overlays/i2c-mux-overlay.dts | 40 +++++++++++++++++--
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2 files changed, 53 insertions(+), 3 deletions(-)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -1833,6 +1833,22 @@ Params: pca9542 Select t
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addr Change I2C address of the device (default 0x70)
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+ i2c0 Choose the I2C0 bus on GPIOs 0&1
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+
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+ i2c_csi_dsi Choose the I2C0 bus on GPIOs 44&45
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+
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+ i2c3 Choose the I2C3 bus (configure with the i2c3
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+ overlay - BCM2711 only)
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+
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+ i2c4 Choose the I2C3 bus (configure with the i2c3
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+ overlay - BCM2711 only)
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+
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+ i2c5 Choose the I2C5 bus (configure with the i2c4
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+ overlay - BCM2711 only)
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+
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+ i2c6 Choose the I2C6 bus (configure with the i2c6
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+ overlay - BCM2711 only)
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+
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[ The i2c-mux-pca9548a overlay has been deleted. See i2c-mux. ]
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--- a/arch/arm/boot/dts/overlays/i2c-mux-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/i2c-mux-overlay.dts
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@@ -7,7 +7,7 @@
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compatible = "brcm,bcm2835";
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fragment@0 {
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- target = <&i2c_arm>;
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+ target = <&i2cbus>;
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__dormant__ {
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#address-cells = <1>;
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#size-cells = <0>;
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@@ -34,7 +34,7 @@
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};
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fragment@1 {
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- target = <&i2c_arm>;
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+ target = <&i2cbus>;
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__dormant__ {
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#address-cells = <1>;
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#size-cells = <0>;
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@@ -71,7 +71,7 @@
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};
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fragment@2 {
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- target = <&i2c_arm>;
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+ target = <&i2cbus>;
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__dormant__ {
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#address-cells = <1>;
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#size-cells = <0>;
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@@ -127,6 +127,27 @@
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};
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};
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+ frag100: fragment@100 {
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+ target = <&i2c_arm>;
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+ i2cbus: __overlay__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@101 {
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+ target = <&i2c0if>;
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+ __dormant__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@102 {
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+ target = <&i2c0mux>;
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+ __dormant__ {
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+ status = "okay";
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+ };
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+ };
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+
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__overrides__ {
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pca9542 = <0>, "+0";
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pca9545 = <0>, "+1";
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@@ -135,5 +156,18 @@
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addr = <&pca9542>,"reg:0",
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<&pca9545>,"reg:0",
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<&pca9548>,"reg:0";
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+
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+ i2c0 = <&frag100>, "target:0=",<&i2c0>,
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+ <0>,"+101+102";
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+ i2c_csi_dsi = <&frag100>, "target:0=",<&i2c_csi_dsi>,
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+ <0>,"+101+102";
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+ i2c3 = <&frag100>, "target?=0",
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+ <&frag100>, "target-path=i2c3";
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+ i2c4 = <&frag100>, "target?=0",
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+ <&frag100>, "target-path=i2c4";
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+ i2c5 = <&frag100>, "target?=0",
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+ <&frag100>, "target-path=i2c5";
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+ i2c6 = <&frag100>, "target?=0",
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+ <&frag100>, "target-path=i2c6";
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};
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};
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