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140 lines
3.7 KiB
Diff
140 lines
3.7 KiB
Diff
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From 2541eaca2c169ca90e017b5a3b014b41c0988909 Mon Sep 17 00:00:00 2001
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From: Janis Streib <janis+github@dogcraft.de>
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Date: Sun, 15 Oct 2023 21:08:40 +0200
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Subject: [PATCH 0672/1085] overlays: mcp23017: allow specification of the i2c
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bus
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Analogous to i2c-rtc-overlay.dts
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See: https://github.com/raspberrypi/linux/pull/5650
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---
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arch/arm/boot/dts/overlays/README | 10 +++
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.../boot/dts/overlays/mcp23017-overlay.dts | 68 ++++++++++++++-----
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2 files changed, 61 insertions(+), 17 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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@@ -2810,6 +2810,16 @@ Params: gpiopin Gpio pin
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mcp23008 Configure an MCP23008 instead.
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noints Disable the interrupt GPIO line.
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+ i2c0 Choose the I2C0 bus on GPIOs 0&1
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+ i2c_csi_dsi Choose the I2C0 bus on GPIOs 44&45
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+ i2c3 Choose the I2C3 bus (configure with the i2c3
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+ overlay - BCM2711 only)
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+ i2c4 Choose the I2C4 bus (configure with the i2c4
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+ overlay - BCM2711 only)
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+ i2c5 Choose the I2C5 bus (configure with the i2c5
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+ overlay - BCM2711 only)
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+ i2c6 Choose the I2C6 bus (configure with the i2c6
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+ overlay - BCM2711 only)
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Name: mcp23s17
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--- a/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/mcp23017-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 = <&i2c1>;
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+ target = <&i2cbus>;
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__overlay__ {
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status = "okay";
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};
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@@ -24,13 +24,33 @@
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};
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fragment@2 {
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- target = <&i2c1>;
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+ target = <&mcp23017>;
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+ __dormant__ {
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+ compatible = "microchip,mcp23008";
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+ };
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+ };
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+
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+ fragment@3 {
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+ target = <&mcp23017>;
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+ mcp23017_irq: __overlay__ {
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+ #interrupt-cells=<2>;
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+ interrupt-parent = <&gpio>;
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+ interrupts = <4 2>;
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+ interrupt-controller;
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+ microchip,irq-mirror;
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+ };
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+ };
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+
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+ fragment@4 {
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+ target = <&i2cbus>;
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__overlay__ {
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#address-cells = <1>;
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#size-cells = <0>;
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mcp23017: mcp@20 {
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compatible = "microchip,mcp23017";
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+ pinctrl-name = "default";
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+ pinctrl-0 = <&mcp23017_pins>;
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reg = <0x20>;
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gpio-controller;
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#gpio-cells = <2>;
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@@ -40,30 +60,44 @@
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};
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};
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- fragment@3 {
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- target = <&mcp23017>;
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- __dormant__ {
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- compatible = "microchip,mcp23008";
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+ frag100: fragment@100 {
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+ target = <&i2c1>;
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+ i2cbus: __overlay__ {
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+ status = "okay";
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};
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};
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- fragment@4 {
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- target = <&mcp23017>;
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- mcp23017_irq: __overlay__ {
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- #interrupt-cells=<2>;
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- interrupt-parent = <&gpio>;
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- interrupts = <4 2>;
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- interrupt-controller;
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- microchip,irq-mirror;
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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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__overrides__ {
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gpiopin = <&mcp23017_pins>,"brcm,pins:0",
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<&mcp23017_irq>,"interrupts:0";
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addr = <&mcp23017>,"reg:0", <&mcp23017_pins>,"reg:0";
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- mcp23008 = <0>,"=3";
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- noints = <0>,"!1!4";
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+ mcp23008 = <0>,"=2";
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+ noints = <0>,"!1!3";
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+ i2c0 = <&frag100>, "target:0=",<&i2c0>;
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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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