MIPS: DTS: img: add device tree for Marduk board

Add support for Imagination Technologies' Marduk board which is based
on Pistachio SoC. It is also known as Creator Ci40. Marduk is legacy
name and will be there for decades.

Documentation for this board can be found on
https://docs.creatordev.io/ci40/

This patch adds initial support for board with following peripherals:

* PWM based heartbeat LED
* GPIO based buttons
* SPI NOR flash on SPI1
* UART0 and UART1
* SD card
* Ethernet
* USB
* PWM
* ADC
* I2C

Signed-off-by: Rahul Bedarkar <rahul.bedarkar@imgtec.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: James Hartley <james.hartley@imgtec.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14394/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 172 insertions, 0 deletions

diff --git a/arch/mips/boot/dts/img/Makefile b/arch/mips/boot/dts/img/Makefile
new file mode 100644
index 000000000000..69a65f0f82d2
--- /dev/null
+++ b/arch/mips/boot/dts/img/Makefile
@@ -0,0 +1,9 @@
+dtb-$(CONFIG_MACH_PISTACHIO)    += pistachio_marduk.dtb
+
+obj-y                           += $(patsubst %.dtb, %.dtb.o, $(dtb-y))
+
+# Force kbuild to make empty built-in.o if necessary
+obj-                            += dummy.o
+
+always                          := $(dtb-y)
+clean-files                     := *.dtb *.dtb.S
diff --git a/arch/mips/boot/dts/img/pistachio_marduk.dts b/arch/mips/boot/dts/img/pistachio_marduk.dts
new file mode 100644
index 000000000000..cf9cebd52294
--- /dev/null
+++ b/arch/mips/boot/dts/img/pistachio_marduk.dts
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2015, 2016 Imagination Technologies Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * IMG Marduk board is also known as Creator Ci40.
+ */
+
+/dts-v1/;
+
+#include "pistachio.dtsi"
+
+/ {
+        model = "IMG Marduk (Creator Ci40)";
+        compatible = "img,pistachio-marduk", "img,pistachio";
+
+        aliases {
+                serial0 = &uart0;
+                serial1 = &uart1;
+                ethernet0 = &enet;
+                spi0 = &spfi0;
+                spi1 = &spfi1;
+        };
+
+        chosen {
+                bootargs = "root=/dev/sda1 rootwait ro lpj=723968";
+                stdout-path = "serial1:115200";
+        };
+
+        memory {
+                device_type = "memory";
+                reg =  <0x00000000 0x10000000>;
+        };
+
+        reg_1v8: fixed-regulator {
+                compatible = "regulator-fixed";
+                regulator-name = "aux_adc_vref";
+                regulator-min-microvolt = <1800000>;
+                regulator-max-microvolt = <1800000>;
+                regulator-boot-on;
+        };
+
+        internal_dac_supply: internal-dac-supply {
+                compatible = "regulator-fixed";
+                regulator-name = "internal_dac_supply";
+                regulator-min-microvolt = <1800000>;
+                regulator-max-microvolt = <1800000>;
+        };
+
+        leds {
+                compatible = "pwm-leds";
+                heartbeat {
+                        label = "marduk:red:heartbeat";
+                        pwms = <&pwm 3 300000>;
+                        max-brightness = <255>;
+                        linux,default-trigger = "heartbeat";
+                };
+        };
+
+        keys {
+                compatible = "gpio-keys";
+                button@1 {
+                        label = "Button 1";
+                        linux,code = <0x101>; /* BTN_1 */
+                        gpios = <&gpio3 6 GPIO_ACTIVE_LOW>;
+                };
+                button@2 {
+                        label = "Button 2";
+                        linux,code = <0x102>; /* BTN_2 */
+                        gpios = <&gpio2 14 GPIO_ACTIVE_LOW>;
+                };
+        };
+};
+
+&internal_dac {
+        VDD-supply = <&internal_dac_supply>;
+};
+
+&spfi1 {
+        status = "okay";
+
+        pinctrl-0 = <&spim1_pins>, <&spim1_quad_pins>, <&spim1_cs0_pin>,
+                    <&spim1_cs1_pin>;
+        pinctrl-names = "default";
+        cs-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>, <&gpio0 1 GPIO_ACTIVE_HIGH>;
+
+        flash@0 {
+                compatible = "spansion,s25fl016k", "jedec,spi-nor";
+                reg = <0>;
+                spi-max-frequency = <50000000>;
+        };
+};
+
+&uart0 {
+        status = "okay";
+        assigned-clock-rates = <114278400>, <1843200>;
+};
+
+&uart1 {
+        status = "okay";
+};
+
+&usb {
+        status = "okay";
+};
+
+&enet {
+        status = "okay";
+};
+
+&pin_enet {
+        drive-strength = <2>;
+};
+
+&pin_enet_phy_clk {
+        drive-strength = <2>;
+};
+
+&sdhost {
+        status = "okay";
+        bus-width = <4>;
+        disable-wp;
+};
+
+&pin_sdhost_cmd {
+        drive-strength = <2>;
+};
+
+&pin_sdhost_data {
+        drive-strength = <2>;
+};
+
+&pwm {
+        status = "okay";
+
+        pinctrl-0 = <&pwmpdm0_pin>, <&pwmpdm1_pin>, <&pwmpdm2_pin>,
+                    <&pwmpdm3_pin>;
+        pinctrl-names = "default";
+};
+
+&adc {
+        status = "okay";
+        vref-supply = <&reg_1v8>;
+        adc-reserved-channels = <0x10>;
+};
+
+&i2c2 {
+        status = "okay";
+        clock-frequency = <400000>;
+
+        tpm@20 {
+                compatible = "infineon,slb9645tt";
+                reg = <0x20>;
+        };
+
+};
+
+&i2c3 {
+        status = "okay";
+        clock-frequency = <400000>;
+};