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Add the bare minimum needed to boot BCM2708 from a Device Tree. Signed-off-by: Noralf Tronnes <notro@tronnes.org> BCM2708: DT: change 'axi' nodename to 'soc' Change DT node named 'axi' to 'soc' so it matches ARCH_BCM2835. The VC4 bootloader fills in certain properties in the 'axi' subtree, but since this is part of an upstreaming effort, the name is changed. Signed-off-by: Noralf Tronnes notro@tronnes.org BCM2708_DT: Correct length of the peripheral space Use dts-dirs feature for overlays. The kernel makefiles have a dts-dirs target that is for vendor subdirectories. Using this fixes the install_dtbs target, which previously did not install the overlays. BCM270X_DT: configure I2S DMA channels Signed-off-by: Matthias Reichl <hias@horus.com> BCM270X_DT: switch to bcm2835-i2s I2S soundcard drivers with proper devicetree support (i.e. not linking to the cpu_dai/platform via name but to cpu/platform via of_node) will work out of the box without any modifications. When the kernel is compiled without devicetree support the platform code will instantiate the bcm2708-i2s driver and I2S soundcard drivers will link to it via name, as before. Signed-off-by: Matthias Reichl <hias@horus.com>
40 lines
685 B
Plaintext
40 lines
685 B
Plaintext
// Definitions for w1-gpio module (without external pullup)
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/dts-v1/;
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/plugin/;
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/ {
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compatible = "brcm,bcm2708";
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fragment@0 {
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target-path = "/";
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__overlay__ {
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w1: onewire@0 {
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compatible = "w1-gpio";
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pinctrl-names = "default";
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pinctrl-0 = <&w1_pins>;
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gpios = <&gpio 4 0>;
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rpi,parasitic-power = <0>;
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status = "okay";
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};
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};
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};
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fragment@1 {
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target = <&gpio>;
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__overlay__ {
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w1_pins: w1_pins {
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brcm,pins = <4>;
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brcm,function = <0>; // in (initially)
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brcm,pull = <0>; // off
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};
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};
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};
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__overrides__ {
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gpiopin = <&w1>,"gpios:4",
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<&w1_pins>,"brcm,pins:0";
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pullup = <&w1>,"rpi,parasitic-power:0";
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};
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};
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