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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>
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// SPDX-License-Identifier: GPL-2.0 | ||
/dts-v1/; | ||
#include "bcm2837.dtsi" | ||
#include "bcm2836-rpi.dtsi" | ||
#include "bcm283x-rpi-usb-host.dtsi" | ||
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/ { | ||
compatible = "raspberrypi,3-model-a-plus", "brcm,bcm2837"; | ||
model = "Raspberry Pi 3 Model A+"; | ||
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chosen { | ||
/* 8250 auxiliary UART instead of pl011 */ | ||
stdout-path = "serial1:115200n8"; | ||
}; | ||
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memory { | ||
reg = <0 0x20000000>; | ||
}; | ||
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leds { | ||
act { | ||
gpios = <&gpio 29 GPIO_ACTIVE_HIGH>; | ||
}; | ||
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pwr { | ||
label = "PWR"; | ||
gpios = <&expgpio 2 GPIO_ACTIVE_LOW>; | ||
}; | ||
}; | ||
}; | ||
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&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"; | ||
}; | ||
}; | ||
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&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"; | ||
}; | ||
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&hdmi { | ||
hpd-gpios = <&gpio 28 GPIO_ACTIVE_LOW>; | ||
}; | ||
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&pwm { | ||
pinctrl-names = "default"; | ||
pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio41>; | ||
status = "okay"; | ||
}; | ||
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/* | ||
* 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; | ||
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brcmf: wifi@1 { | ||
reg = <1>; | ||
compatible = "brcm,bcm4329-fmac"; | ||
}; | ||
}; | ||
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/* SDHOST is used to drive the SD card */ | ||
&sdhost { | ||
pinctrl-names = "default"; | ||
pinctrl-0 = <&sdhost_gpio48>; | ||
status = "okay"; | ||
bus-width = <4>; | ||
}; | ||
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/* uart0 communicates with the BT module */ | ||
&uart0 { | ||
pinctrl-names = "default"; | ||
pinctrl-0 = <&uart0_ctsrts_gpio30 &uart0_gpio32 &gpclk2_gpio43>; | ||
status = "okay"; | ||
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bluetooth { | ||
compatible = "brcm,bcm43438-bt"; | ||
max-speed = <2000000>; | ||
}; | ||
}; | ||
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/* uart1 is mapped to the pin header */ | ||
&uart1 { | ||
pinctrl-names = "default"; | ||
pinctrl-0 = <&uart1_gpio14>; | ||
status = "okay"; | ||
}; |