From 3fa2fbb7f6e60b85086e454403c5eab1af63b1aa Mon Sep 17 00:00:00 2001 From: Dave Stevenson Date: Wed, 14 Jun 2023 13:43:58 +0100 Subject: [PATCH] dtoverlays: Add i2c bus overrides to edt-ft5406 overlay Adds the option for the touch controller to be connected to any of the I2C ports. Signed-off-by: Dave Stevenson --- arch/arm/boot/dts/overlays/README | 17 +++++++++++++++- .../boot/dts/overlays/edt-ft5406-overlay.dts | 20 +++++++++++++++++++ arch/arm/boot/dts/overlays/edt-ft5406.dtsi | 9 ++++++++- 3 files changed, 44 insertions(+), 2 deletions(-) --- a/arch/arm/boot/dts/overlays/README +++ b/arch/arm/boot/dts/overlays/README @@ -1040,9 +1040,11 @@ Params: dr_mode Dual rol Name: edt-ft5406 -Info: Overlay for the EDT FT5406 touchscreen on the CSI/DSI I2C interface. +Info: Overlay for the EDT FT5406 touchscreen. This works with the Raspberry Pi 7" touchscreen when not being polled by the firmware. + By default the overlay uses the i2c_csi_dsi I2C interface, but this + can be overridden You MUST use either "disable_touchscreen=1" or "ignore_lcd=1" in config.txt to stop the firmware polling the touchscreen. Load: dtoverlay=edt-ft5406,= @@ -1051,6 +1053,19 @@ Params: sizex Touchscr invx Touchscreen inverted x axis invy Touchscreen inverted y axis swapxy Touchscreen swapped x y axis + i2c0 Choose the I2C0 bus on GPIOs 0&1 + i2c1 Choose the I2C1 bus on GPIOs 2&3 + i2c3 Choose the I2C3 bus (configure with the i2c3 + overlay - BCM2711 only) + i2c4 Choose the I2C4 bus (configure with the i2c4 + overlay - BCM2711 only) + i2c5 Choose the I2C5 bus (configure with the i2c5 + overlay - BCM2711 only) + i2c6 Choose the I2C6 bus (configure with the i2c6 + overlay - BCM2711 only) + addr Sets the address for the touch controller. Note + that the device must be configured to use the + specified address. Name: enc28j60 --- a/arch/arm/boot/dts/overlays/edt-ft5406-overlay.dts +++ b/arch/arm/boot/dts/overlays/edt-ft5406-overlay.dts @@ -23,4 +23,24 @@ status = "okay"; }; }; + + __overrides__ { + i2c0 = <&frag13>,"target:0=",<&i2c0>; + i2c1 = <&frag13>, "target?=0", + <&frag13>, "target-path=i2c1", + <0>,"-0-1"; + i2c3 = <&frag13>, "target?=0", + <&frag13>, "target-path=i2c3", + <0>,"-0-1"; + i2c4 = <&frag13>, "target?=0", + <&frag13>, "target-path=i2c4", + <0>,"-0-1"; + i2c5 = <&frag13>, "target?=0", + <&frag13>, "target-path=i2c5", + <0>,"-0-1"; + i2c6 = <&frag13>, "target?=0", + <&frag13>, "target-path=i2c6", + <0>,"-0-1"; + addr = <&ft5406>,"reg:0"; + }; }; --- a/arch/arm/boot/dts/overlays/edt-ft5406.dtsi +++ b/arch/arm/boot/dts/overlays/edt-ft5406.dtsi @@ -23,7 +23,7 @@ }; fragment@12 { - target = <&i2c_csi_dsi>; + target = <&i2cbus>; __overlay__ { #address-cells = <1>; #size-cells = <0>; @@ -37,6 +37,13 @@ }; }; + frag13: fragment@13 { + target = <&i2c_csi_dsi>; + i2cbus: __overlay__ { + status = "okay"; + }; + }; + __overrides__ { sizex = <&ft5406>,"touchscreen-size-x:0"; sizey = <&ft5406>,"touchscreen-size-y:0";