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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c8e96e0703
Control the Chromecast's two LEDs using PWM instead of GPIO pins. This allows for variable brightness. Signed-off-by: Thomas Hebb <tommyhebb@gmail.com> Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
109 lines
3.1 KiB
Plaintext
109 lines
3.1 KiB
Plaintext
/*
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* Device Tree file for Google Chromecast
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*
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* Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
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*
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* This file is dual-licensed: you can use it either under the terms
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* of the GPL or the X11 license, at your option. Note that this dual
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* licensing only applies to this file, and not this project as a
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* whole.
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*
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* a) This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*
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* Or, alternatively,
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*
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* b) Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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/dts-v1/;
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#include "berlin2cd.dtsi"
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#include <dt-bindings/gpio/gpio.h>
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/ {
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model = "Google Chromecast";
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compatible = "google,chromecast", "marvell,berlin2cd", "marvell,berlin";
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chosen {
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bootargs = "earlyprintk";
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stdout-path = "serial0:115200n8";
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};
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memory@0 {
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device_type = "memory";
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/*
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* We're using "linux,usable-memory" instead of "reg" here
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* because the (signed and encrypted) bootloader that shipped
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* with this device provides an incorrect memory range in
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* ATAG_MEM. Linux helpfully overrides the "reg" property with
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* data from the ATAG, so we can't specify the proper range
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* normally. Fortunately, this alternate property is checked
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* first by the OF driver, so we can (ab)use it instead.
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*/
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linux,usable-memory = <0x00000000 0x20000000>; /* 512 MB */
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};
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leds {
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compatible = "pwm-leds";
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pinctrl-0 = <&ledpwm_pmux>;
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pinctrl-names = "default";
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white {
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label = "white";
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pwms = <&pwm 0 600000 0>;
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max-brightness = <255>;
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linux,default-trigger = "default-on";
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};
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red {
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label = "red";
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pwms = <&pwm 1 600000 0>;
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max-brightness = <255>;
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};
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};
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};
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/*
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* AzureWave AW-NH387 (Marvell 88W8787)
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* 802.11b/g/n + Bluetooth 2.1
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*/
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&sdhci0 {
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non-removable;
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status = "okay";
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};
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&uart0 { status = "okay"; };
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&usb_phy1 { status = "okay"; };
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&usb1 { status = "okay"; };
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&soc_pinctrl {
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ledpwm_pmux: ledpwm-pmux {
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groups = "G0";
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function = "pwm";
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};
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};
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