[2/3] ARM: dts: bcm: Add support for Raspberry Pi 2 (2nd rev)

Commit Message

Stefan Wahren April 18, 2025, 2:33 p.m. UTC

The Raspberry Pi 2 (2nd rev) has the BCM2837 SoC instead of the
BCM2836. Except of this the configuration of the board is same
as the predecessor (no WLAN, no BT).

Signed-off-by: Stefan Wahren <[e-mail]>
---
 arch/arm/boot/dts/broadcom/Makefile           |   2 +
 .../arm/boot/dts/broadcom/bcm2837-rpi-2-b.dts | 130 ++++++++++++++++++
 2 files changed, 132 insertions(+)
 create mode 100644 arch/arm/boot/dts/broadcom/bcm2837-rpi-2-b.dts

Patch

diff --git a/arch/arm/boot/dts/broadcom/Makefile b/arch/arm/boot/dts/broadcom/Makefile
index d23cf466127b..71062ff9adbe 100644
--- a/arch/arm/boot/dts/broadcom/Makefile
+++ b/arch/arm/boot/dts/broadcom/Makefile
@@ -7,6 +7,7 @@  DTC_FLAGS_bcm2835-rpi-b-plus := -@
 DTC_FLAGS_bcm2835-rpi-a-plus := -@
 DTC_FLAGS_bcm2835-rpi-cm1-io1 := -@
 DTC_FLAGS_bcm2836-rpi-2-b := -@
+DTC_FLAGS_bcm2837-rpi-2-b := -@
 DTC_FLAGS_bcm2837-rpi-3-a-plus := -@
 DTC_FLAGS_bcm2837-rpi-3-b := -@
 DTC_FLAGS_bcm2837-rpi-3-b-plus := -@
@@ -25,6 +26,7 @@  dtb-$(CONFIG_ARCH_BCM2835) += \
 	bcm2835-rpi-a-plus.dtb \
 	bcm2835-rpi-cm1-io1.dtb \
 	bcm2836-rpi-2-b.dtb \
+	bcm2837-rpi-2-b.dtb \
 	bcm2837-rpi-3-a-plus.dtb \
 	bcm2837-rpi-3-b.dtb \
 	bcm2837-rpi-3-b-plus.dtb \
diff --git a/arch/arm/boot/dts/broadcom/bcm2837-rpi-2-b.dts b/arch/arm/boot/dts/broadcom/bcm2837-rpi-2-b.dts
new file mode 100644
index 000000000000..1868cee05853
--- /dev/null
+++ b/arch/arm/boot/dts/broadcom/bcm2837-rpi-2-b.dts
@@ -0,0 +1,130 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+#include "bcm2837.dtsi"
+#include "bcm2836-rpi.dtsi"
+#include "bcm283x-rpi-led-deprecated.dtsi"
+#include "bcm283x-rpi-smsc9514.dtsi"
+#include "bcm283x-rpi-usb-host.dtsi"
+
+/ {
+	compatible = "raspberrypi,2-model-b-rev2", "brcm,bcm2837";
+	model = "Raspberry Pi 2 Model B rev 1.2";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0 0x40000000>;
+	};
+};
+
+&gpio {
+	/*
+	 * Taken from rpi_SCH_2b_1p2_reduced.pdf and
+	 * the official GPU firmware DT blob.
+	 *
+	 * Legend:
+	 * "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",
+			  "GPIO2",
+			  "GPIO3",
+			  "GPIO4",
+			  "GPIO5",
+			  "GPIO6",
+			  "GPIO7",
+			  "GPIO8",
+			  "GPIO9",
+			  "GPIO10",
+			  "GPIO11",
+			  "GPIO12",
+			  "GPIO13",
+			  "GPIO14",
+			  "GPIO15",
+			  "GPIO16",
+			  "GPIO17",
+			  "GPIO18",
+			  "GPIO19",
+			  "GPIO20",
+			  "GPIO21",
+			  "GPIO22",
+			  "GPIO23",
+			  "GPIO24",
+			  "GPIO25",
+			  "GPIO26",
+			  "GPIO27",
+			  "SDA0",
+			  "SCL0",
+			  "", /* GPIO30 */
+			  "LAN_RUN",
+			  "CAM_GPIO1",
+			  "", /* GPIO33 */
+			  "", /* GPIO34 */
+			  "PWR_LOW_N",
+			  "", /* GPIO36 */
+			  "", /* GPIO37 */
+			  "USB_LIMIT",
+			  "", /* GPIO39 */
+			  "PWM0_OUT",
+			  "CAM_GPIO0",
+			  "SMPS_SCL",
+			  "SMPS_SDA",
+			  "ETH_CLK",
+			  "PWM1_OUT",
+			  "HDMI_HPD_N",
+			  "STATUS_LED",
+			  /* Used by SD Card */
+			  "SD_CLK_R",
+			  "SD_CMD_R",
+			  "SD_DATA0_R",
+			  "SD_DATA1_R",
+			  "SD_DATA2_R",
+			  "SD_DATA3_R";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&gpioout &alt0 &i2s_alt0>;
+
+	/* I2S interface */
+	i2s_alt0: i2s_alt0 {
+		brcm,pins = <18 19 20 21>;
+		brcm,function = <BCM2835_FSEL_ALT0>;
+	};
+};
+
+&hdmi {
+	hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>;
+	power-domains = <&power RPI_POWER_DOMAIN_HDMI>;
+	status = "okay";
+};
+
+&led_act {
+	gpios = <&gpio 47 GPIO_ACTIVE_HIGH>;
+};
+
+&leds {
+	led-pwr {
+		label = "PWR";
+		gpios = <&gpio 35 GPIO_ACTIVE_HIGH>;
+		default-state = "keep";
+		linux,default-trigger = "default-on";
+	};
+};
+
+&pwm {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pwm0_gpio40 &pwm1_gpio45>;
+	status = "okay";
+};
+
+&sdhost {
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdhost_gpio48>;
+	bus-width = <4>;
+	status = "okay";
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_gpio14>;
+	status = "okay";
+};