arm: mvebu: Add SolidRun ClearFog Armada 38x initial support

This patch adds basic support for the SolidRun ClearFog Armada 38x based
board to mainline U-Boot. Supported interfaces / devices are:
- DDR3
- UART
- MMC
- Ethernet port 0 (connected to dedicated PHY)
- I2C

The included DT source was taken from Russell King's ftp server:
http://www.home.arm.linux.org.uk/~rmk/clearfog/

With only minor modifications, like the addition of some aliases and the
"u-boot,dm-pre-reloc" property.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Rabeeh Khoury <rabeeh@solid-run.com>
Cc: Luka Perkov <luka.perkov@sartura.hr>

4 files changed, 514 insertions, 0 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ab621cca7d..4b5cd57f71 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -828,6 +828,7 @@ source "board/siemens/draco/Kconfig"
 source "board/siemens/pxm2/Kconfig"
 source "board/siemens/rut/Kconfig"
 source "board/silica/pengwyn/Kconfig"
+source "board/solidrun/clearfog/Kconfig"
 source "board/spear/spear300/Kconfig"
 source "board/spear/spear310/Kconfig"
 source "board/spear/spear320/Kconfig"
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index a2964953db..084f11327d 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -48,6 +48,7 @@ dtb-$(CONFIG_TEGRA) += tegra20-harmony.dtb \
 	tegra210-p2571.dtb
 
 dtb-$(CONFIG_ARCH_MVEBU) +=			\
+	armada-388-clearfog.dtb			\
 	armada-388-gp.dtb			\
 	armada-xp-gp.dtb			\
 	armada-xp-maxbcm.dtb
diff --git a/arch/arm/dts/armada-388-clearfog.dts b/arch/arm/dts/armada-388-clearfog.dts
new file mode 100644
index 0000000000..b2dfd56435
--- /dev/null
+++ b/arch/arm/dts/armada-388-clearfog.dts
@@ -0,0 +1,509 @@
+/*
+ * Device Tree file for SolidRun Clearfog revision A1 rev 2.0 (88F6828)
+ *
+ *  Copyright (C) 2015 Russell King
+ *
+ * This board is in development; the contents of this file work with
+ * the A1 rev 2.0 of the board, which does not represent final
+ * production board.  Things will change, don't expect this file to
+ * remain compatible info the future.
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ *  a) This file 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.
+ *
+ *     This file is distributed in the hope that it will be useful
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ * Or, alternatively
+ *
+ *  b) Permission is hereby granted, free of charge, to any person
+ *     obtaining a copy of this software and associated documentation
+ *     files (the "Software"), to deal in the Software without
+ *     restriction, including without limitation the rights to use
+ *     copy, modify, merge, publish, distribute, sublicense, and/or
+ *     sell copies of the Software, and to permit persons to whom the
+ *     Software is furnished to do so, subject to the following
+ *     conditions:
+ *
+ *     The above copyright notice and this permission notice shall be
+ *     included in all copies or substantial portions of the Software.
+ *
+ *     THE SOFTWARE IS PROVIDED , WITHOUT WARRANTY OF ANY KIND
+ *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY
+ *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *     OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/dts-v1/;
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/gpio.h>
+#include "armada-388.dtsi"
+
+/ {
+	model = "SolidRun Clearfog A1";
+	compatible = "solidrun,clearfog-a1", "marvell,armada388",
+		"marvell,armada385", "marvell,armada380";
+
+	aliases {
+		/* So that mvebu u-boot can update the MAC addresses */
+		ethernet1 = &eth0;
+		ethernet2 = &eth1;
+		ethernet3 = &eth2;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x00000000 0x10000000>; /* 256 MB */
+	};
+
+	reg_3p3v: regulator-3p3v {
+		compatible = "regulator-fixed";
+		regulator-name = "3P3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
+
+	soc {
+		ranges = <MBUS_ID(0xf0, 0x01) 0 0xf1000000 0x100000
+			  MBUS_ID(0x01, 0x1d) 0 0xfff00000 0x100000
+			  MBUS_ID(0x09, 0x19) 0 0xf1100000 0x10000
+			  MBUS_ID(0x09, 0x15) 0 0xf1110000 0x10000>;
+
+		internal-regs {
+			ethernet@30000 {
+				mac-address = [00 50 43 02 02 02];
+				phy-mode = "sgmii";
+				status = "okay";
+
+				fixed-link {
+					speed = <1000>;
+					full-duplex;
+				};
+			};
+
+			ethernet@34000 {
+				mac-address = [00 50 43 02 02 03];
+				managed = "in-band-status";
+				phy-mode = "sgmii";
+				status = "okay";
+			};
+
+			ethernet@70000 {
+				mac-address = [00 50 43 02 02 01];
+				pinctrl-0 = <&ge0_rgmii_pins>;
+				pinctrl-names = "default";
+				phy = <&phy_dedicated>;
+				phy-mode = "rgmii-id";
+				status = "okay";
+			};
+
+			i2c@11000 {
+				/* Is there anything on this? */
+				clock-frequency = <100000>;
+				pinctrl-0 = <&i2c0_pins>;
+				pinctrl-names = "default";
+				status = "okay";
+
+				/*
+				 * PCA9655 GPIO expander, up to 1MHz clock.
+				 *  0-CON3 CLKREQ#
+				 *  1-CON3 PERST#
+				 *  2-CON2 PERST#
+				 *  3-CON3 W_DISABLE
+				 *  4-CON2 CLKREQ#
+				 *  5-USB3 overcurrent
+				 *  6-USB3 power
+				 *  7-CON2 W_DISABLE
+				 *  8-JP4 P1
+				 *  9-JP4 P4
+				 * 10-JP4 P5
+				 * 11-m.2 DEVSLP
+				 * 12-SFP_LOS
+				 * 13-SFP_TX_FAULT
+				 * 14-SFP_TX_DISABLE
+				 * 15-SFP_MOD_DEF0
+				 */
+				expander0: gpio-expander@20 {
+					/*
+					 * This is how it should be:
+					 * compatible = "onnn,pca9655",
+					 *	 "nxp,pca9555";
+					 * but you can't do this because of
+					 * the way I2C works.
+					 */
+					compatible = "nxp,pca9555";
+					gpio-controller;
+					#gpio-cells = <2>;
+					reg = <0x20>;
+
+					pcie1_0_clkreq {
+						gpio-hog;
+						gpios = <0 GPIO_ACTIVE_LOW>;
+						input;
+						line-name = "pcie1.0-clkreq";
+					};
+					pcie1_0_w_disable {
+						gpio-hog;
+						gpios = <3 GPIO_ACTIVE_LOW>;
+						output-low;
+						line-name = "pcie1.0-w-disable";
+					};
+					pcie2_0_clkreq {
+						gpio-hog;
+						gpios = <4 GPIO_ACTIVE_LOW>;
+						input;
+						line-name = "pcie2.0-clkreq";
+					};
+					pcie2_0_w_disable {
+						gpio-hog;
+						gpios = <7 GPIO_ACTIVE_LOW>;
+						output-low;
+						line-name = "pcie2.0-w-disable";
+					};
+					usb3_ilimit {
+						gpio-hog;
+						gpios = <5 GPIO_ACTIVE_LOW>;
+						input;
+						line-name = "usb3-current-limit";
+					};
+					usb3_power {
+						gpio-hog;
+						gpios = <6 GPIO_ACTIVE_HIGH>;
+						output-high;
+						line-name = "usb3-power";
+					};
+					m2_devslp {
+						gpio-hog;
+						gpios = <11 GPIO_ACTIVE_HIGH>;
+						output-low;
+						line-name = "m.2 devslp";
+					};
+				};
+
+				/* The MCP3021 is 100kHz clock only */
+				mikrobus_adc: mcp3021@4c {
+					compatible = "microchip,mcp3021";
+					reg = <0x4c>;
+				};
+
+				/* Also something at 0x64 */
+			};
+
+			i2c@11100 {
+				/*
+				 * Routed to SFP, mikrobus, and PCIe.
+				 * SFP limits this to 100kHz, and requires
+				 *  an AT24C01A/02/04 with address pins tied
+				 *  low, which takes addresses 0x50 and 0x51.
+				 * Mikrobus doesn't specify beyond an I2C
+				 *  bus being present.
+				 * PCIe uses ARP to assign addresses, or
+				 *  0x63-0x64.
+				 */
+				clock-frequency = <100000>;
+				pinctrl-0 = <&clearfog_i2c1_pins>;
+				pinctrl-names = "default";
+				status = "okay";
+			};
+
+			mdio@72004 {
+				pinctrl-0 = <&mdio_pins>;
+				pinctrl-names = "default";
+
+				phy_dedicated: ethernet-phy@0 {
+					/*
+					 * Annoyingly, the marvell phy driver
+					 * configures the LED register, rather
+					 * than preserving reset-loaded setting.
+					 * We undo that rubbish here.
+					 */
+					marvell,reg-init = <3 16 0 0x101e>;
+					reg = <0>;
+				};
+			};
+
+			pinctrl@18000 {
+				clearfog_dsa0_clk_pins: clearfog-dsa0-clk-pins {
+					marvell,pins = "mpp46";
+					marvell,function = "ref";
+				};
+				clearfog_dsa0_pins: clearfog-dsa0-pins {
+					marvell,pins = "mpp23", "mpp41";
+					marvell,function = "gpio";
+				};
+				clearfog_i2c1_pins: i2c1-pins {
+					/* SFP, PCIe, mSATA, mikrobus */
+					marvell,pins = "mpp26", "mpp27";
+					marvell,function = "i2c1";
+				};
+				clearfog_sdhci_cd_pins: clearfog-sdhci-cd-pins {
+					marvell,pins = "mpp20";
+					marvell,function = "gpio";
+				};
+				clearfog_sdhci_pins: clearfog-sdhci-pins {
+					marvell,pins = "mpp21", "mpp28",
+						       "mpp37", "mpp38",
+						       "mpp39", "mpp40";
+					marvell,function = "sd0";
+				};
+				clearfog_spi1_cs_pins: spi1-cs-pins {
+					marvell,pins = "mpp55";
+					marvell,function = "spi1";
+				};
+				mikro_pins: mikro-pins {
+					/* int: mpp22 rst: mpp29 */
+					marvell,pins = "mpp22", "mpp29";
+					marvell,function = "gpio";
+				};
+				mikro_spi_pins: mikro-spi-pins {
+					marvell,pins = "mpp43";
+					marvell,function = "spi1";
+				};
+				mikro_uart_pins: mikro-uart-pins {
+					marvell,pins = "mpp24", "mpp25";
+					marvell,function = "ua1";
+				};
+				rear_button_pins: rear-button-pins {
+					marvell,pins = "mpp34";
+					marvell,function = "gpio";
+				};
+			};
+
+			rtc@a3800 {
+				/*
+				 * If the rtc doesn't work, run "date reset"
+				 * twice in u-boot.
+				 */
+				status = "okay";
+			};
+
+			sata@a8000 {
+				/* pinctrl? */
+				status = "okay";
+			};
+
+			sata@e0000 {
+				/* pinctrl? */
+				status = "okay";
+			};
+
+			sdhci@d8000 {
+				bus-width = <4>;
+				cd-gpios = <&gpio0 20 GPIO_ACTIVE_LOW>;
+				no-1-8-v;
+				pinctrl-0 = <&clearfog_sdhci_pins
+					     &clearfog_sdhci_cd_pins>;
+				pinctrl-names = "default";
+				status = "okay";
+				vmmc = <&reg_3p3v>;
+				wp-inverted;
+			};
+
+			serial@12000 {
+				pinctrl-0 = <&uart0_pins>;
+				pinctrl-names = "default";
+				status = "okay";
+				u-boot,dm-pre-reloc;
+			};
+
+			serial@12100 {
+				/* mikrobus uart */
+				pinctrl-0 = <&mikro_uart_pins>;
+				pinctrl-names = "default";
+				status = "okay";
+			};
+
+			spi@10680 {
+				/*
+				 * We don't seem to have the W25Q32 on the
+				 * A1 Rev 2.0 boards, so disable SPI.
+				 * CS0: W25Q32 (doesn't appear to be present)
+				 * CS1:
+				 * CS2: mikrobus
+				 */
+				pinctrl-0 = <&spi1_pins &clearfog_spi1_cs_pins &mikro_spi_pins>;
+				pinctrl-names = "default";
+				status = "okay";
+
+				spi-flash@0 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					compatible = "w25q32", "jedec,spi-nor";
+					reg = <0>; /* Chip select 0 */
+					spi-max-frequency = <3000000>;
+					status = "disabled";
+				};
+			};
+
+			usb3@f8000 {
+				status = "okay";
+			};
+		};
+
+		pcie-controller {
+			status = "okay";
+			/*
+			 * The two PCIe units are accessible through
+			 * the mini-PCIe connectors on the board.
+			 */
+			pcie@2,0 {
+				/* Port 1, Lane 0. CONN3, nearest power. */
+				reset-gpios = <&expander0 1 GPIO_ACTIVE_LOW>;
+				status = "okay";
+			};
+			pcie@3,0 {
+				/* Port 2, Lane 0. CONN2, nearest CPU. */
+				reset-gpios = <&expander0 2 GPIO_ACTIVE_LOW>;
+				status = "okay";
+			};
+		};
+	};
+
+	sfp: sfp {
+		compatible = "sff,sfp";
+		i2c-bus = <&i2c1>;
+		los-gpio = <&expander0 12 GPIO_ACTIVE_HIGH>;
+		moddef0-gpio = <&expander0 15 GPIO_ACTIVE_LOW>;
+		sfp,ethernet = <&eth2>;
+		tx-disable-gpio = <&expander0 14 GPIO_ACTIVE_HIGH>;
+		tx-fault-gpio = <&expander0 13 GPIO_ACTIVE_HIGH>;
+	};
+
+	dsa@0 {
+		compatible = "marvell,dsa";
+		dsa,ethernet = <&eth1>;
+		dsa,mii-bus = <&mdio>;
+		pinctrl-0 = <&clearfog_dsa0_clk_pins &clearfog_dsa0_pins>;
+		pinctrl-names = "default";
+		#address-cells = <2>;
+		#size-cells = <0>;
+
+		switch@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <4 0>;
+
+			port@0 {
+				reg = <0>;
+				label = "lan1";
+			};
+
+			port@1 {
+				reg = <1>;
+				label = "lan2";
+			};
+
+			port@2 {
+				reg = <2>;
+				label = "lan3";
+			};
+
+			port@3 {
+				reg = <3>;
+				label = "lan4";
+			};
+
+			port@4 {
+				reg = <4>;
+				label = "lan5";
+			};
+
+			port@5 {
+				reg = <5>;
+				label = "cpu";
+			};
+
+			port@6 {
+				/* 88E1512 external phy */
+				reg = <6>;
+				label = "lan6";
+				fixed-link {
+					speed = <1000>;
+					full-duplex;
+				};
+			};
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		pinctrl-0 = <&rear_button_pins>;
+		pinctrl-names = "default";
+
+		button_0 {
+			/* The rear SW3 button */
+			label = "Rear Button";
+			gpios = <&gpio1 2 GPIO_ACTIVE_LOW>;
+			linux,can-disable;
+			linux,code = <BTN_0>;
+		};
+	};
+};
+
+/*
++#define A38x_CUSTOMER_BOARD_1_MPP16_23         0x00400011
+MPP18: gpio		? (pca9655 int?)
+MPP19: gpio		? (clkreq?)
+MPP20: gpio		? (sd0 detect)
+MPP21: sd0:cmd		x sd0
+MPP22: gpio		x mikro int
+MPP23: gpio		x switch irq
++#define A38x_CUSTOMER_BOARD_1_MPP24_31         0x22043333
+MPP24: ua1:rxd		x mikro rx
+MPP25: ua1:txd		x mikro tx
+MPP26: i2c1:sck		x mikro sck
+MPP27: i2c1:sda		x mikro sda
+MPP28: sd0:clk		x sd0
+MPP29: gpio		x mikro rst
+MPP30: ge1:txd2		? (config)
+MPP31: ge1:txd3		? (config)
++#define A38x_CUSTOMER_BOARD_1_MPP32_39         0x44400002
+MPP32: ge1:txctl	? (unused)
+MPP33: gpio		? (pic_com0)
+MPP34: gpio		x rear button (pic_com1)
+MPP35: gpio		? (pic_com2)
+MPP36: gpio		? (unused)
+MPP37: sd0:d3		x sd0
+MPP38: sd0:d0		x sd0
+MPP39: sd0:d1		x sd0
++#define A38x_CUSTOMER_BOARD_1_MPP40_47         0x41144004
+MPP40: sd0:d2		x sd0
+MPP41: gpio		x switch reset
+MPP42: gpio		? sw1-1
+MPP43: spi1:cs2		x mikro cs
+MPP44: sata3:prsnt	? (unused)
+MPP45: ref:clk_out0	?
+MPP46: ref:clk_out1	x switch clk
+MPP47: 4		? (unused)
++#define A38x_CUSTOMER_BOARD_1_MPP48_55         0x40333333
+MPP48: tdm:pclk
+MPP49: tdm:fsync
+MPP50: tdm:drx
+MPP51: tdm:dtx
+MPP52: tdm:int
+MPP53: tdm:rst
+MPP54: gpio		? (pwm)
+MPP55: spi1:cs1		x slic
++#define A38x_CUSTOMER_BOARD_1_MPP56_63         0x00004444
+MPP56: spi1:mosi	x mikro mosi
+MPP57: spi1:sck		x mikro sck
+MPP58: spi1:miso	x mikro miso
+MPP59: spi1:cs0		x w25q32
+*/
diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 79ff0e8278..82a439e6af 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -4,6 +4,9 @@ choice
 	prompt "Marvell MVEBU (Armada XP/38x) board select"
 	optional
 
+config TARGET_CLEARFOG
+	bool "Support ClearFog"
+
 config TARGET_DB_88F6820_GP
 	bool "Support DB-88F6820-GP"