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Merge pull request #1283 from javigomezo/master

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raspberry-pi-4: add tv-hat overlay
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Jörg Thalheim 2024-12-22 11:17:24 +01:00 committed by GitHub
commit e8516a2352
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1
raspberry-pi/4/default.nix
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@ -17,6 +17,7 @@
./pwm0.nix
./tc358743.nix
./touch-ft5406.nix
./tv-hat.nix
./xhci.nix
];

110
raspberry-pi/4/tv-hat.nix Normal file
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@ -0,0 +1,110 @@
{ config, lib, ... }:
let
cfg = config.hardware.raspberry-pi."4".tv-hat;
in {
options.hardware = {
raspberry-pi."4".tv-hat = {
enable = lib.mkEnableOption ''
support for the Raspberry Pi TV Hat.
'';
};
};
config = lib.mkIf cfg.enable {
hardware.raspberry-pi."4".apply-overlays-dtmerge.enable = lib.mkDefault true;
hardware.deviceTree.filter = "*-rpi-4-*.dtb";
hardware.deviceTree.overlays = [
# https://github.com/raspberrypi/linux/blob/rpi-6.1.y/arch/arm/boot/dts/overlays/spi0-0cs-overlay.dts
# https://github.com/raspberrypi/linux/blob/rpi-6.1.y/arch/arm/boot/dts/overlays/rpi-tv-overlay.dts
{
name = "spi0-0cs.dtbo";
dtsText = "
/dts-v1/;
/plugin/;
/{
compatible = \"brcm,bcm2711\";
fragment@0 {
target-path = \"/soc/gpio@7e200000\";
__overlay__ {
spi0_pins: spi0_pins {
brcm,pins = <0x09 0x0a 0x0b>;
brcm,function = <0x04>;
phandle = <0x0d>;
};
spi0_cs_pins: spi0_cs_pins {
brcm,pins = <0x08 0x07>;
brcm,function = <0x01>;
phandle = <0x0e>;
};
};
};
fragment@1 {
target-path = \"/soc/spi@7e204000\";
__overlay__ {
pinctrl-names = \"default\";
pinctrl-0 = <&spi0_pins &spi0_cs_pins>;
cs-gpios = <&gpio 8 1>, <&gpio 7 1>;
status = \"okay\";
spidev0: spidev@0{
compatible = \"lwn,bk4\";
reg = <0>; /* CE0 */
#address-cells = <1>;
#size-cells = <0>;
spi-max-frequency = <125000000>;
};
spidev1: spidev@1{
compatible = \"lwn,bk4\";
reg = <1>; /* CE1 */
#address-cells = <1>;
#size-cells = <0>;
spi-max-frequency = <125000000>;
};
};
};
};";
}
{
name = "rpi-tv-overlay";
dtsText = ''
// rpi-tv HAT
/dts-v1/;
/plugin/;
/ {
compatible = "brcm,bcm2711";
fragment@0 {
target = <&spidev0>;
__overlay__ {
status = "disabled";
};
};
fragment@1 {
target = <&spi0>;
__overlay__ {
/* needed to avoid dtc warning */
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
cxd2880@0 {
compatible = "sony,cxd2880";
reg = <0>; /* CE0 */
spi-max-frequency = <50000000>;
status = "okay";
};
};
};
};
'';
}
];
};
}