[PATCH V2 6/7] ARM: dts: Add Raspberry Pi 400 support
From: Stefan Wahren <hidden>
Date: 2021-06-06 12:17:05
Also in:
linux-arm-kernel, linux-watchdog
Subsystem:
arm and arm64 soc sub-architectures (common parts), the rest · Maintainers:
Arnd Bergmann, Krzysztof Kozlowski, Alexandre Belloni, Linus Walleij, Linus Torvalds
The Raspberry Pi 400 is like a Pi 4 B designed into a keyboard. But there are some minor differences: - higher CPU clock rate (1.8 GHz) - different Wifi chip (BCM43456) - power off is now handled via GPIO - no ACT LED Signed-off-by: Stefan Wahren <redacted> --- arch/arm/boot/dts/Makefile | 1 + arch/arm/boot/dts/bcm2711-rpi-400.dts | 45 +++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+) create mode 100644 arch/arm/boot/dts/bcm2711-rpi-400.dts
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index f8f09c5..ec00dba 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile@@ -88,6 +88,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += \ bcm2837-rpi-3-b.dtb \ bcm2837-rpi-3-b-plus.dtb \ bcm2837-rpi-cm3-io3.dtb \ + bcm2711-rpi-400.dtb \ bcm2711-rpi-4-b.dtb \ bcm2835-rpi-zero.dtb \ bcm2835-rpi-zero-w.dtb
diff --git a/arch/arm/boot/dts/bcm2711-rpi-400.dts b/arch/arm/boot/dts/bcm2711-rpi-400.dts
new file mode 100644
index 0000000..f4d2fc2
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2711-rpi-400.dts@@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +#include "bcm2711-rpi-4-b.dts" + +/ { + compatible = "raspberrypi,400", "brcm,bcm2711"; + model = "Raspberry Pi 400"; + + chosen { + /* 8250 auxiliary UART instead of pl011 */ + stdout-path = "serial1:115200n8"; + }; + + leds { + /delete-node/ led-act; + + led-pwr { + gpios = <&gpio 42 GPIO_ACTIVE_HIGH>; + }; + }; + + gpio-poweroff { + compatible = "gpio-poweroff"; + gpios = <&expgpio 5 GPIO_ACTIVE_HIGH>; + }; +}; + +&expgpio { + gpio-line-names = "BT_ON", + "WL_ON", + "", + "GLOBAL_RESET", + "VDD_SD_IO_SEL", + "CAM_GPIO", + "SD_PWR_ON", + "SD_OC_N"; +}; + +&genet_mdio { + clock-frequency = <1950000>; +}; + +&pm { + /delete-property/ system-power-controller; +};
--
2.7.4