diff options
author | Stefan Wahren <stefan.wahren@i2se.com> | 2018-12-28 23:09:26 +0100 |
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committer | Stefan Wahren <stefan.wahren@i2se.com> | 2019-02-01 11:54:51 +0100 |
commit | 0040cf8dc9257049f9d4c11f1d38c82886cd391f (patch) | |
tree | 250a71f426b46cc138934163c98aa93b379b1355 /arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts | |
parent | b9e176e0f9c949ccb30fc28d4fc29c92207354cf (diff) | |
download | linux-0040cf8dc9257049f9d4c11f1d38c82886cd391f.tar.bz2 |
ARM: dts: add Raspberry Pi 3 A+
The Raspberry Pi 3 A+ is similar to the Pi 3 B+ but has only 512 MB RAM,
1 USB 2.0 port and no Ethernet.
Compared to the Raspberry Pi 3 B it isn't possible to control BT_ON and
WL_ON separately.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts')
-rw-r--r-- | arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts b/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts new file mode 100644 index 000000000000..e9fadd338227 --- /dev/null +++ b/arch/arm/boot/dts/bcm2837-rpi-3-a-plus.dts @@ -0,0 +1,175 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +#include "bcm2837.dtsi" +#include "bcm2836-rpi.dtsi" +#include "bcm283x-rpi-usb-host.dtsi" + +/ { + compatible = "raspberrypi,3-model-a-plus", "brcm,bcm2837"; + model = "Raspberry Pi 3 Model A+"; + + chosen { + /* 8250 auxiliary UART instead of pl011 */ + stdout-path = "serial1:115200n8"; + }; + + memory { + reg = <0 0x20000000>; + }; + + leds { + act { + gpios = <&gpio 29 GPIO_ACTIVE_HIGH>; + }; + + pwr { + label = "PWR"; + gpios = <&expgpio 2 GPIO_ACTIVE_LOW>; + }; + }; +}; + +&firmware { + expgpio: gpio { + compatible = "raspberrypi,firmware-gpio"; + gpio-controller; + #gpio-cells = <2>; + gpio-line-names = "", + "BT_WL_ON", + "STATUS_LED_R", + "", + "", + "CAM_GPIO0", + "CAM_GPIO1", + ""; + status = "okay"; + }; +}; + +&gpio { + /* + * This is mostly based on the official GPU firmware DT blob. + * + * Legend: + * "NC" = not connected (no rail from the SoC) + * "FOO" = GPIO line named "FOO" on the schematic + * "FOO_N" = GPIO line named "FOO" on schematic, active low + */ + gpio-line-names = "ID_SDA", + "ID_SCL", + "SDA1", + "SCL1", + "GPIO_GCLK", + "GPIO5", + "GPIO6", + "SPI_CE1_N", + "SPI_CE0_N", + "SPI_MISO", + "SPI_MOSI", + "SPI_SCLK", + "GPIO12", + "GPIO13", + /* Serial port */ + "TXD1", + "RXD1", + "GPIO16", + "GPIO17", + "GPIO18", + "GPIO19", + "GPIO20", + "GPIO21", + "GPIO22", + "GPIO23", + "GPIO24", + "GPIO25", + "GPIO26", + "GPIO27", + "HDMI_HPD_N", + "STATUS_LED_G", + /* Used by BT module */ + "CTS0", + "RTS0", + "TXD0", + "RXD0", + /* Used by Wifi */ + "SD1_CLK", + "SD1_CMD", + "SD1_DATA0", + "SD1_DATA1", + "SD1_DATA2", + "SD1_DATA3", + "PWM0_OUT", + "PWM1_OUT", + "", /* GPIO42 */ + "WIFI_CLK", + "SDA0", + "SCL0", + "SMPS_SCL", + "SMPS_SDA", + /* Used by SD Card */ + "SD_CLK_R", + "SD_CMD_R", + "SD_DATA0_R", + "SD_DATA1_R", + "SD_DATA2_R", + "SD_DATA3_R"; +}; + +&hdmi { + hpd-gpios = <&gpio 28 GPIO_ACTIVE_LOW>; +}; + +&pwm { + pinctrl-names = "default"; + pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio41>; + status = "okay"; +}; + +/* + * SDHCI is used to control the SDIO for wireless + * + * WL_REG_ON and BT_REG_ON of the CYW43455 Wifi/BT module are driven + * by a single GPIO. We can't give GPIO control to one of the drivers, + * otherwise the other part would get unexpectedly disturbed. + */ +&sdhci { + #address-cells = <1>; + #size-cells = <0>; + pinctrl-names = "default"; + pinctrl-0 = <&emmc_gpio34>; + status = "okay"; + bus-width = <4>; + non-removable; + + brcmf: wifi@1 { + reg = <1>; + compatible = "brcm,bcm4329-fmac"; + }; +}; + +/* SDHOST is used to drive the SD card */ +&sdhost { + pinctrl-names = "default"; + pinctrl-0 = <&sdhost_gpio48>; + status = "okay"; + bus-width = <4>; +}; + +/* uart0 communicates with the BT module */ +&uart0 { + pinctrl-names = "default"; + pinctrl-0 = <&uart0_ctsrts_gpio30 &uart0_gpio32 &gpclk2_gpio43>; + status = "okay"; + + bluetooth { + compatible = "brcm,bcm43438-bt"; + max-speed = <2000000>; + }; +}; + +/* uart1 is mapped to the pin header */ +&uart1 { + pinctrl-names = "default"; + pinctrl-0 = <&uart1_gpio14>; + status = "okay"; +}; |