arm: at91: taurus/axm: add DM and DTS support

add DM and DTS support for the at91 based siemens
boards.

Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Andreas Bießmann <andreas@biessmann.org>
[rebased on current ToT]
Signed-off-by: Andreas Bießmann <andreas@biessmann.org>

arch/arm/dts/Makefile

@@ -3,6 +3,7 @@
 #
 
 dtb-$(CONFIG_AT91FAMILY) += at91sam9260-smartweb.dtb \
+	at91sam9g20-taurus.dtb \
 	at91sam9g45-corvus.dtb \
 	at91sam9g45-gurnard.dtb
 

arch/arm/dts/at91sam9g20-taurus.dts

@@ -0,0 +1,119 @@
+/*
+ * at91sam9g20-taurus.dts
+ * (C) Copyright 2016
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * Based on:
+ * at91sam9g20ek.dts - Device Tree file for Atmel at91sam9g20ek board
+ *
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * Licensed under GPLv2.
+ */
+/dts-v1/;
+#include "at91sam9g20.dtsi"
+
+/ {
+	model = "Siemens taurus";
+	compatible = "atmel,at91sam9g20ek", "atmel,at91sam9g20", "atmel,at91sam9";
+
+	chosen {
+		stdout-path = &dbgu;
+	};
+
+	memory {
+		reg = <0x20000000 0x4000000>;
+	};
+
+	clocks {
+		slow_xtal {
+			clock-frequency = <32768>;
+		};
+
+		main_xtal {
+			clock-frequency = <18432000>;
+		};
+	};
+
+	ahb {
+		apb {
+			pinctrl@fffff400 {
+				board {
+					pinctrl_pck0_as_mck: pck0_as_mck {
+						atmel,pins =
+							<AT91_PIOC 1 AT91_PERIPH_B AT91_PINCTRL_NONE>;	/* PC1 periph B */
+					};
+
+				};
+			};
+
+			dbgu: serial@fffff200 {
+				status = "okay";
+			};
+
+			usart0: serial@fffb0000 {
+				pinctrl-0 =
+					<&pinctrl_usart0
+					 &pinctrl_usart0_rts
+					 &pinctrl_usart0_cts
+					 &pinctrl_usart0_dtr_dsr
+					 &pinctrl_usart0_dcd
+					 &pinctrl_usart0_ri>;
+				status = "okay";
+			};
+
+			usart1: serial@fffb4000 {
+				status = "okay";
+			};
+
+			macb0: ethernet@fffc4000 {
+				phy-mode = "rmii";
+				status = "okay";
+			};
+
+			usb1: gadget@fffa4000 {
+				atmel,vbus-gpio = <&pioC 5 GPIO_ACTIVE_HIGH>;
+				status = "okay";
+			};
+
+			ssc0: ssc@fffbc000 {
+				status = "okay";
+				pinctrl-0 = <&pinctrl_ssc0_tx>;
+			};
+
+			spi0: spi@fffc8000 {
+				cs-gpios = <0>, <&pioC 11 0>, <0>, <0>;
+				mtd_dataflash@0 {
+					compatible = "atmel,at45", "atmel,dataflash";
+					spi-max-frequency = <50000000>;
+					reg = <1>;
+				};
+			};
+
+			rtc@fffffd20 {
+				atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
+				status = "okay";
+			};
+
+			watchdog@fffffd40 {
+				status = "okay";
+			};
+
+			gpbr: syscon@fffffd50 {
+				status = "okay";
+			};
+		};
+
+		nand0: nand@40000000 {
+			nand-bus-width = <8>;
+			nand-ecc-mode = "soft";
+			nand-on-flash-bbt;
+			status = "okay";
+		};
+
+		usb0: ohci@00500000 {
+			num-ports = <2>;
+			status = "okay";
+		};
+	};
+};

arch/arm/mach-at91/Kconfig

@@ -131,6 +131,10 @@ config TARGET_TAURUS
 	bool "Support taurus"
 	select CPU_ARM926EJS
 	select SUPPORT_SPL
+	select DM
+	select DM_SERIAL
+	select DM_GPIO
+	select DM_ETH
 
 config TARGET_SMARTWEB
 	bool "Support smartweb"

board/siemens/taurus/taurus.c

@@ -14,6 +14,7 @@
 
 #include <command.h>
 #include <common.h>
+#include <dm.h>
 #include <asm/io.h>
 #include <asm/arch/at91sam9260_matrix.h>
 #include <asm/arch/at91sam9_smc.h>
@@ -21,17 +22,28 @@
 #include <asm/arch/at91_rstc.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/at91sam9_sdramc.h>
+#include <asm/arch/atmel_serial.h>
 #include <asm/arch/clk.h>
+#include <asm/gpio.h>
 #include <linux/mtd/nand.h>
 #include <atmel_mci.h>
 #include <asm/arch/at91_spi.h>
 #include <spi.h>
 
 #include <net.h>
+#ifndef CONFIG_DM_ETH
 #include <netdev.h>
+#endif
 
 DECLARE_GLOBAL_DATA_PTR;
 
+static void taurus_request_gpio(void)
+{
+	gpio_request(CONFIG_SYS_NAND_ENABLE_PIN, "nand ena");
+	gpio_request(CONFIG_SYS_NAND_READY_PIN, "nand rdy");
+	gpio_request(AT91_PIN_PA25, "ena PHY");
+}
+
 static void taurus_nand_hw_init(void)
 {
 	struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
@@ -265,6 +277,7 @@ int board_early_init_f(void)
 	at91_periph_clk_enable(ATMEL_ID_PIOC);
 
 	at91_seriald_hw_init();
+	taurus_request_gpio();
 
 	return 0;
 }
@@ -308,6 +321,7 @@ int board_init(void)
 	/* adress of boot parameters */
 	gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
 
+	taurus_request_gpio();
 #ifdef CONFIG_CMD_NAND
 	taurus_nand_hw_init();
 #endif
@@ -330,6 +344,7 @@ int dram_init(void)
 	return 0;
 }
 
+#ifndef CONFIG_DM_ETH
 int board_eth_init(bd_t *bis)
 {
 	int rc = 0;
@@ -338,6 +353,7 @@ int board_eth_init(bd_t *bis)
 #endif
 	return rc;
 }
+#endif
 
 #if !defined(CONFIG_SPL_BUILD)
 #if defined(CONFIG_BOARD_AXM)
@@ -432,3 +448,12 @@ U_BOOT_CMD(
 );
 #endif
 #endif
+
+static struct atmel_serial_platdata at91sam9260_serial_plat = {
+	.base_addr = ATMEL_BASE_DBGU,
+};
+
+U_BOOT_DEVICE(at91sam9260_serial) = {
+	.name   = "serial_atmel",
+	.platdata = &at91sam9260_serial_plat,
+};

configs/axm_defconfig

@@ -1,8 +1,10 @@
 CONFIG_ARM=y
 CONFIG_ARCH_AT91=y
 CONFIG_TARGET_TAURUS=y
+CONFIG_DEFAULT_DEVICE_TREE="at91sam9g20-taurus"
 CONFIG_SPL=y
 CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9G20,MACH_TYPE=2068,BOARD_AXM"
+CONFIG_HUSH_PARSER=y
 CONFIG_BOOTDELAY=3
 # CONFIG_CMD_BDI is not set
 CONFIG_CMD_BOOTZ=y
@@ -16,7 +18,8 @@ CONFIG_CMD_SPI=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_PING=y
+CONFIG_OF_CONTROL=y
+CONFIG_OF_EMBED=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_USE_TINY_PRINTF=y
-CONFIG_OF_LIBFDT=y

configs/taurus_defconfig

@@ -1,8 +1,10 @@
 CONFIG_ARM=y
 CONFIG_ARCH_AT91=y
 CONFIG_TARGET_TAURUS=y
+CONFIG_DEFAULT_DEVICE_TREE="at91sam9g20-taurus"
 CONFIG_SPL=y
 CONFIG_SYS_EXTRA_OPTIONS="AT91SAM9G20,MACH_TYPE=2067,BOARD_TAURUS"
+CONFIG_HUSH_PARSER=y
 CONFIG_BOOTDELAY=3
 CONFIG_SYS_PROMPT="U-Boot> "
 # CONFIG_CMD_BDI is not set
@@ -19,6 +21,8 @@ CONFIG_CMD_DFU=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_PING=y
+CONFIG_OF_CONTROL=y
+CONFIG_OF_EMBED=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_USB=y
@@ -28,4 +32,3 @@ CONFIG_G_DNL_MANUFACTURER="Siemens AG"
 CONFIG_G_DNL_VENDOR_NUM=0x0908
 CONFIG_G_DNL_PRODUCT_NUM=0x02d2
 CONFIG_USE_TINY_PRINTF=y
-CONFIG_OF_LIBFDT=y

include/configs/taurus.h

@@ -45,7 +45,7 @@
 #define CONFIG_CMDLINE_TAG		/* enable passing of ATAGs */
 #define CONFIG_SETUP_MEMORY_TAGS
 #define CONFIG_INITRD_TAG
-#define CONFIG_SKIP_LOWLEVEL_INIT
+#define CONFIG_SKIP_LOWLEVEL_INIT_ONLY
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_DISPLAY_CPUINFO