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103 lines
3.7 KiB
Diff
103 lines
3.7 KiB
Diff
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From 3fa2fbb7f6e60b85086e454403c5eab1af63b1aa Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Wed, 14 Jun 2023 13:43:58 +0100
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Subject: [PATCH] dtoverlays: Add i2c bus overrides to edt-ft5406 overlay
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Adds the option for the touch controller to be connected to any
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of the I2C ports.
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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 | 17 +++++++++++++++-
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.../boot/dts/overlays/edt-ft5406-overlay.dts | 20 +++++++++++++++++++
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arch/arm/boot/dts/overlays/edt-ft5406.dtsi | 9 ++++++++-
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3 files changed, 44 insertions(+), 2 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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@@ -1040,9 +1040,11 @@ Params: dr_mode Dual rol
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Name: edt-ft5406
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-Info: Overlay for the EDT FT5406 touchscreen on the CSI/DSI I2C interface.
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+Info: Overlay for the EDT FT5406 touchscreen.
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This works with the Raspberry Pi 7" touchscreen when not being polled
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by the firmware.
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+ By default the overlay uses the i2c_csi_dsi I2C interface, but this
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+ can be overridden
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You MUST use either "disable_touchscreen=1" or "ignore_lcd=1" in
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config.txt to stop the firmware polling the touchscreen.
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Load: dtoverlay=edt-ft5406,<param>=<val>
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@@ -1051,6 +1053,19 @@ Params: sizex Touchscr
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invx Touchscreen inverted x axis
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invy Touchscreen inverted y axis
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swapxy Touchscreen swapped x y axis
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+ i2c0 Choose the I2C0 bus on GPIOs 0&1
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+ i2c1 Choose the I2C1 bus on GPIOs 2&3
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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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+ addr Sets the address for the touch controller. Note
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+ that the device must be configured to use the
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+ specified address.
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Name: enc28j60
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--- a/arch/arm/boot/dts/overlays/edt-ft5406-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/edt-ft5406-overlay.dts
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@@ -23,4 +23,24 @@
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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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+ i2c0 = <&frag13>,"target:0=",<&i2c0>;
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+ i2c1 = <&frag13>, "target?=0",
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+ <&frag13>, "target-path=i2c1",
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+ <0>,"-0-1";
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+ i2c3 = <&frag13>, "target?=0",
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+ <&frag13>, "target-path=i2c3",
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+ <0>,"-0-1";
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+ i2c4 = <&frag13>, "target?=0",
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+ <&frag13>, "target-path=i2c4",
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+ <0>,"-0-1";
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+ i2c5 = <&frag13>, "target?=0",
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+ <&frag13>, "target-path=i2c5",
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+ <0>,"-0-1";
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+ i2c6 = <&frag13>, "target?=0",
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+ <&frag13>, "target-path=i2c6",
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+ <0>,"-0-1";
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+ addr = <&ft5406>,"reg:0";
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+ };
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};
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--- a/arch/arm/boot/dts/overlays/edt-ft5406.dtsi
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+++ b/arch/arm/boot/dts/overlays/edt-ft5406.dtsi
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@@ -23,7 +23,7 @@
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};
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fragment@12 {
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- target = <&i2c_csi_dsi>;
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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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@@ -37,6 +37,13 @@
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};
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};
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+ frag13: fragment@13 {
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+ target = <&i2c_csi_dsi>;
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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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__overrides__ {
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sizex = <&ft5406>,"touchscreen-size-x:0";
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sizey = <&ft5406>,"touchscreen-size-y:0";
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