[U-Boot] [PATCH] ARM: legoev3: convert to driver model

[David Lechner <david@lechnology.com>]

This converts LEGO MINDSTORMS EV3 to the driver model. MMC, SERIAL, SPI
and SPI_FLASH are converted.

The device tree contains only the minimal nodes required by U-Boot
since the size of U-Boot is limited to 256K on this device.

Signed-off-by: David Lechner <david@lechnology.com>
---
 arch/arm/dts/Makefile           |  3 +-
 arch/arm/dts/da850-lego-ev3.dts | 89 +++++++++++++++++++++++++++++++++
 board/lego/ev3/README           |  3 ++
 board/lego/ev3/legoev3.c        | 22 --------
 configs/legoev3_defconfig       |  9 +++-
 include/configs/legoev3.h       |  3 --
 6 files changed, 102 insertions(+), 27 deletions(-)
 create mode 100644 arch/arm/dts/da850-lego-ev3.dts

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 31ef2b66a3..fcbfc2a912 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -30,7 +30,8 @@ dtb-$(CONFIG_EXYNOS7420) += exynos7420-espresso7420.dtb
 
 dtb-$(CONFIG_ARCH_DAVINCI) += \
 	da850-evm.dtb \
-	da850-lcdk.dtb
+	da850-lcdk.dtb \
+	da850-lego-ev3.dtb
 
 dtb-$(CONFIG_KIRKWOOD) += \
 	kirkwood-atl-sbx81lifkw.dtb \
diff --git a/arch/arm/dts/da850-lego-ev3.dts b/arch/arm/dts/da850-lego-ev3.dts
new file mode 100644
index 0000000000..e281d039fd
--- /dev/null
+++ b/arch/arm/dts/da850-lego-ev3.dts
@@ -0,0 +1,89 @@
+/*
+ * Device tree for LEGO MINDSTORMS EV3
+ *
+ * Copyright (C) 2017 David Lechner <david@lechnology.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ * This is an absolute minimum device tree instead of using the one from Linux
+ * because the bootloader on the EV3 is limited to 256k. This saves us >10k.
+ */
+
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+	compatible = "lego,ev3", "ti,da850";
+	model = "LEGO MINDSTORMS EV3";
+
+	aliases {
+		serial1 = &serial1;
+		spi0 = &spi0;
+	};
+
+	chosen {
+		stdout-path = &serial1;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0xc0000000 0x04000000>;
+	};
+
+	arm {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+		intc: interrupt-controller at fffee000 {
+			compatible = "ti,cp-intc";
+			interrupt-controller;
+			#interrupt-cells = <1>;
+			ti,intc-size = <101>;
+			reg = <0xfffee000 0x2000>;
+		};
+	};
+
+	soc at 1c00000 {
+		compatible = "simple-bus";
+		model = "da850";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0x01c00000 0x400000>;
+		interrupt-parent = <&intc>;
+
+		mmc0: mmc at 40000 {
+			compatible = "ti,da830-mmc";
+			reg = <0x40000 0x1000>;
+			cap-sd-highspeed;
+			cap-mmc-highspeed;
+			interrupts = <16>;
+			max-frequency = <50000000>;
+			bus-width = <4>;
+		};
+
+		spi0: spi at 41000 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "ti,da830-spi";
+			reg = <0x41000 0x1000>;
+			num-cs = <6>;
+			ti,davinci-spi-intr-line = <1>;
+			interrupts = <20>;
+
+			flash at 0 {
+				compatible = "micron,n25q128a13", "jedec,spi-nor", "spi-flash";
+				reg = <0>;
+				spi-max-frequency = <50000000>;
+			};
+		};
+
+		serial1: serial at 10c000 {
+			compatible = "ti,da830-uart", "ns16550a";
+			reg = <0x10c000 0x100>;
+			reg-io-width = <4>;
+			reg-shift = <2>;
+			interrupts = <53>;
+		};
+	};
+};
diff --git a/board/lego/ev3/README b/board/lego/ev3/README
index da62a649ba..9ad93e8205 100644
--- a/board/lego/ev3/README
+++ b/board/lego/ev3/README
@@ -50,3 +50,6 @@ software or a 3rd party program capable of uploading a firmware file.
 If you are booting from the microSD card, it is enough to just write uboot.bin
 to the flash. If you are not using a microSD card, you will need to create an
 image file using the layout described above.
+
+IMPORTANT: The EEPROM bootloader only copies 256k, so u-boot.img must not
+exceed that size!
diff --git a/board/lego/ev3/legoev3.c b/board/lego/ev3/legoev3.c
index 423c2fa44b..fa099e95f5 100644
--- a/board/lego/ev3/legoev3.c
+++ b/board/lego/ev3/legoev3.c
@@ -25,11 +25,6 @@
 #include <asm/mach-types.h>
 #include <asm/setup.h>
 
-#ifdef CONFIG_MMC_DAVINCI
-#include <mmc.h>
-#include <asm/arch/sdmmc_defs.h>
-#endif
-
 DECLARE_GLOBAL_DATA_PTR;
 
 u8 board_rev;
@@ -38,23 +33,6 @@ u8 board_rev;
 #define EEPROM_REV_OFFSET	0x3F00
 #define EEPROM_MAC_OFFSET	0x3F06
 
-#ifdef CONFIG_MMC_DAVINCI
-static struct davinci_mmc mmc_sd0 = {
-	.reg_base = (struct davinci_mmc_regs *)DAVINCI_MMC_SD0_BASE,
-	.host_caps = MMC_MODE_4BIT,     /* DA850 supports only 4-bit SD/MMC */
-	.voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
-	.version = MMC_CTLR_VERSION_2,
-};
-
-int board_mmc_init(bd_t *bis)
-{
-	mmc_sd0.input_clk = clk_get(DAVINCI_MMCSD_CLKID);
-
-	/* Add slot-0 to mmc subsystem */
-	return davinci_mmc_init(bis, &mmc_sd0);
-}
-#endif
-
 const struct pinmux_resource pinmuxes[] = {
 	PINMUX_ITEM(spi0_pins_base),
 	PINMUX_ITEM(spi0_pins_scs0),
diff --git a/configs/legoev3_defconfig b/configs/legoev3_defconfig
index 32cd52c13e..78cca8eb56 100644
--- a/configs/legoev3_defconfig
+++ b/configs/legoev3_defconfig
@@ -23,12 +23,19 @@ CONFIG_CMD_SPI=y
 CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_DIAG=y
+CONFIG_OF_CONTROL=y
+CONFIG_DEFAULT_DEVICE_TREE="da850-lego-ev3"
+CONFIG_DM=y
+# CONFIG_DM_DEVICE_REMOVE is not set
 CONFIG_SYS_I2C_DAVINCI=y
+CONFIG_DM_MMC=y
+CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
 CONFIG_SF_DEFAULT_SPEED=50000000
 CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
 CONFIG_SPI=y
+CONFIG_DM_SPI=y
 CONFIG_DAVINCI_SPI=y
-CONFIG_OF_LIBFDT=y
 # CONFIG_EFI_LOADER is not set
diff --git a/include/configs/legoev3.h b/include/configs/legoev3.h
index 36ca3b201e..c97e6a0ebb 100644
--- a/include/configs/legoev3.h
+++ b/include/configs/legoev3.h
@@ -42,11 +42,8 @@
  * Serial Driver info
  */
 #define CONFIG_SYS_NS16550_SERIAL
-#define CONFIG_SYS_NS16550_REG_SIZE	-4	/* NS16550 register size */
-#define CONFIG_SYS_NS16550_COM1	DAVINCI_UART1_BASE /* Base address of UART1 */
 #define CONFIG_SYS_NS16550_CLK	clk_get(DAVINCI_UART2_CLKID)
 
-#define CONFIG_SYS_SPI_BASE		DAVINCI_SPI0_BASE
 #define CONFIG_SYS_SPI_CLK		clk_get(DAVINCI_SPI0_CLKID)
 
 /*
-- 
2.17.1