ARM: dts: add Raspberry Pi Compute Module 3 and IO board

The Raspberry Pi Compute Module 3 (CM3) and the Raspberry Pi
Compute Module 3 Lite (CM3L) are SoMs which contains a BCM2837 processor,
1 GB RAM and a GPIO expander. The CM3 has a 4 GB eMMC, but on the CM3L
the eMMC is unpopulated and it's up to the user to connect their
own SD/MMC device. The dtsi file is designed to work for both modules.
There is also a matching carrier board which is called
Compute Module IO Board V3.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>

diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index b5bd3de87c331ed9f7e85d43767c46c3831dfbcc..35c749fe22eb1c1dbfa4fae76f964132810b76a8 100644 (file)
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -81,6 +81,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += \
        bcm2836-rpi-2-b.dtb \
        bcm2837-rpi-3-b.dtb \
        bcm2837-rpi-3-b-plus.dtb \
+       bcm2837-rpi-cm3-io3.dtb \
        bcm2835-rpi-zero.dtb \
        bcm2835-rpi-zero-w.dtb
 dtb-$(CONFIG_ARCH_BCM_5301X) += \

diff --git a/arch/arm/boot/dts/bcm2837-rpi-cm3-io3.dts b/arch/arm/boot/dts/bcm2837-rpi-cm3-io3.dts
new file mode 100644 (file)
index 0000000..6c8233a
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2837-rpi-cm3-io3.dts
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+#include "bcm2837-rpi-cm3.dtsi"
+#include "bcm283x-rpi-usb-host.dtsi"
+
+/ {
+       compatible = "raspberrypi,3-compute-module", "brcm,bcm2837";
+       model = "Raspberry Pi Compute Module 3 IO board V3.0";
+};
+
+&gpio {
+       /*
+        * This is 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 = "GPIO0",
+                         "GPIO1",
+                         "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",
+                         "GPIO28",
+                         "GPIO29",
+                         "GPIO30",
+                         "GPIO31",
+                         "GPIO32",
+                         "GPIO33",
+                         "GPIO34",
+                         "GPIO35",
+                         "GPIO36",
+                         "GPIO37",
+                         "GPIO38",
+                         "GPIO39",
+                         "GPIO40",
+                         "GPIO41",
+                         "GPIO42",
+                         "GPIO43",
+                         "GPIO44",
+                         "GPIO45",
+                         "GPIO46",
+                         "GPIO47",
+                         /* Used by eMMC */
+                         "SD_CLK_R",
+                         "SD_CMD_R",
+                         "SD_DATA0_R",
+                         "SD_DATA1_R",
+                         "SD_DATA2_R",
+                         "SD_DATA3_R";
+
+       pinctrl-0 = <&gpioout &alt0>;
+};
+
+&hdmi {
+       hpd-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;
+};
+
+&uart0 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&uart0_gpio14>;
+       status = "okay";
+};

diff --git a/arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi b/arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi
new file mode 100644 (file)
index 0000000..7b7ab6a
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2837-rpi-cm3.dtsi
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+#include "bcm2837.dtsi"
+#include "bcm2835-rpi.dtsi"
+
+/ {
+       memory {
+               reg = <0 0x40000000>;
+       };
+
+       reg_3v3: fixed-regulator {
+               compatible = "regulator-fixed";
+               regulator-name = "3V3";
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+               regulator-always-on;
+       };
+
+       reg_1v8: fixed-regulator {
+               compatible = "regulator-fixed";
+               regulator-name = "1V8";
+               regulator-min-microvolt = <1800000>;
+               regulator-max-microvolt = <1800000>;
+               regulator-always-on;
+       };
+};
+
+&firmware {
+       expgpio: gpio {
+               compatible = "raspberrypi,firmware-gpio";
+               gpio-controller;
+               #gpio-cells = <2>;
+               gpio-line-names = "HDMI_HPD_N",
+                                 "EMMC_EN_N",
+                                 "NC",
+                                 "NC",
+                                 "NC",
+                                 "NC",
+                                 "NC",
+                                 "NC";
+               status = "okay";
+       };
+};
+
+&sdhost {
+       pinctrl-names = "default";
+       pinctrl-0 = <&sdhost_gpio48>;
+       bus-width = <4>;
+       vmmc-supply = <&reg_3v3>;
+       vqmmc-supply = <&reg_1v8>;
+       status = "okay";
+};