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https://github.com/torvalds/linux
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c4bb978217
All RPi 1 and 2 boards used the PWM (audio out) on pin 40 and 45. So it was easy to define them in bcm2835-rpi.dtsi. Starting with RPi 3 this wont work anymore, because it uses pin 40 and 41. Furthermore the Zero variants doesn't have audio out. This patch fixes this pin conflict by moving the PWM node to the board-level. Change summary: RPi 3 B: PWM1 45 -> 41 Zero, Zero W: PWM disabled all other: no functional change Reported-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Reviewed-by: Eric Anholt <eric@anholt.net> Signed-off-by: Eric Anholt <eric@anholt.net>
110 lines
2.1 KiB
Plaintext
110 lines
2.1 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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/dts-v1/;
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#include "bcm2835.dtsi"
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#include "bcm2835-rpi.dtsi"
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#include "bcm283x-rpi-usb-host.dtsi"
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/ {
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compatible = "raspberrypi,model-a", "brcm,bcm2835";
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model = "Raspberry Pi Model A";
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leds {
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act {
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gpios = <&gpio 16 GPIO_ACTIVE_LOW>;
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};
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};
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};
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&gpio {
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/*
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* Taken from Raspberry-Pi-Rev-1.0-Model-AB-Schematics.pdf
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* RPI00021 sheet 02
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*
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* Legend:
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* "NC" = not connected (no rail from the SoC)
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* "FOO" = GPIO line named "FOO" on the schematic
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* "FOO_N" = GPIO line named "FOO" on schematic, active low
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*/
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gpio-line-names = "SDA0",
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"SCL0",
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"SDA1",
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"SCL1",
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"GPIO_GCLK",
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"CAM_GPIO1",
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"LAN_RUN",
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"SPI_CE1_N",
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"SPI_CE0_N",
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"SPI_MISO",
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"SPI_MOSI",
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"SPI_SCLK",
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"NC", /* GPIO12 */
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"NC", /* GPIO13 */
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/* Serial port */
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"TXD0",
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"RXD0",
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"STATUS_LED_N",
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"GPIO17",
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"GPIO18",
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"NC", /* GPIO19 */
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"NC", /* GPIO20 */
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"GPIO21",
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"GPIO22",
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"GPIO23",
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"GPIO24",
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"GPIO25",
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"NC", /* GPIO26 */
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"CAM_GPIO0",
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/* Binary number representing build/revision */
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"CONFIG0",
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"CONFIG1",
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"CONFIG2",
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"CONFIG3",
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"NC", /* GPIO32 */
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"NC", /* GPIO33 */
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"NC", /* GPIO34 */
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"NC", /* GPIO35 */
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"NC", /* GPIO36 */
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"NC", /* GPIO37 */
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"NC", /* GPIO38 */
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"NC", /* GPIO39 */
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"PWM0_OUT",
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"NC", /* GPIO41 */
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"NC", /* GPIO42 */
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"NC", /* GPIO43 */
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"NC", /* GPIO44 */
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"PWM1_OUT",
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"HDMI_HPD_P",
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"SD_CARD_DET",
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/* Used by SD Card */
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"SD_CLK_R",
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"SD_CMD_R",
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"SD_DATA0_R",
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"SD_DATA1_R",
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"SD_DATA2_R",
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"SD_DATA3_R";
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pinctrl-0 = <&gpioout &alt0 &i2s_alt2>;
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/* I2S interface */
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i2s_alt2: i2s_alt2 {
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brcm,pins = <28 29 30 31>;
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brcm,function = <BCM2835_FSEL_ALT2>;
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};
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};
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&hdmi {
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hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>;
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};
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&pwm {
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pinctrl-names = "default";
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pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio45>;
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status = "okay";
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};
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&uart0 {
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pinctrl-names = "default";
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pinctrl-0 = <&uart0_gpio14>;
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status = "okay";
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};
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