[U-Boot] [RFC PATCH 12/13] arm: add NanoPi M3 board support

[Andre Przywara]

The NanoPi M3 is a single board computer containing a
Nexell S5P6818 SoC (with 8 ARMv8 Cortex-A53 cores).
Add the respective defconfig and a (preliminary) device tree listing
the devices that we support so far.

Signed-off-by: Andre Przywara <andre.przywara at arm.com>
---
 arch/arm/Kconfig                       |  6 ++++++
 arch/arm/dts/s5p6818-nanopi-m3.dts     | 30 ++++++++++++++++++++++++++++++
 arch/arm/include/asm/arch-nexell/clk.h |  1 +
 arch/arm/mach-nexell/board.c           | 10 ++++++++++
 configs/nanopi_m3_defconfig            | 12 ++++++++++++
 include/configs/s5p6818.h              |  2 ++
 6 files changed, 61 insertions(+)
 create mode 100644 arch/arm/dts/s5p6818-nanopi-m3.dts
 create mode 100644 configs/nanopi_m3_defconfig

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 56f6179fe3..5c52344ca6 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -660,6 +660,12 @@ config ARCH_NEXELL
 	select DM
 	select DM_SERIAL
 	select SAMSUNG_UART
+	select DM_RESET
+	select GENERIC_RESET
+	select DM_MMC
+	select DM_MMC_OPS
+	select MMC_DW
+	select MMC_DW_NEXELL
 
 config ARCH_QEMU
 	bool "QEMU Virtual Platform"
diff --git a/arch/arm/dts/s5p6818-nanopi-m3.dts b/arch/arm/dts/s5p6818-nanopi-m3.dts
new file mode 100644
index 0000000000..c95c40120e
--- /dev/null
+++ b/arch/arm/dts/s5p6818-nanopi-m3.dts
@@ -0,0 +1,30 @@
+/dts-v1/;
+
+#include "s5p6818.dtsi"
+
+/ {
+	model = "Nano Pi M3";
+	compatible = "FriendlyARM,NanoPi-M3";
+
+	chosen {
+		stdout-path = "serial0:115200";
+		bootargs = "console=ttySAC0,115200n8 earlycon=s5pv210,0xc00a1000";
+	};
+
+	aliases {
+		mmc0 = &mmc_0;
+		serial0 = &serial_0;
+	};
+
+	memory {
+		reg = <0x40000000 0x40000000>;
+	};
+};
+
+&serial_0 {
+	status = "okay";
+};
+
+&mmc_0 {
+	status = "okay";
+};
diff --git a/arch/arm/include/asm/arch-nexell/clk.h b/arch/arm/include/asm/arch-nexell/clk.h
index 8cf56ef52c..792aabfffb 100644
--- a/arch/arm/include/asm/arch-nexell/clk.h
+++ b/arch/arm/include/asm/arch-nexell/clk.h
@@ -9,6 +9,7 @@
 #define __ASM_ARCH_CLK_H_
 
 unsigned long get_uart_clk(int dev_index);
+unsigned long get_mmc_clk(int dev_index);
 unsigned long get_pwm_clk(void);
 
 #endif
diff --git a/arch/arm/mach-nexell/board.c b/arch/arm/mach-nexell/board.c
index e9b4f94630..a968863e14 100644
--- a/arch/arm/mach-nexell/board.c
+++ b/arch/arm/mach-nexell/board.c
@@ -112,6 +112,16 @@ unsigned long get_pwm_clk(void)
 	return get_pll_freq(pll_index) / div;
 }
 
+unsigned long get_mmc_clk(int dev_index)
+{
+	uintptr_t clock_ofs[3] = {0xc00c5000, 0xc00cc000, 0xc00cd000};
+
+	if (dev_index < 0 || dev_index >= 3)
+		return 0;
+
+	return get_level1_clk_freq(clock_ofs[dev_index]);
+}
+
 int board_init(void)
 {
 	return 0;
diff --git a/configs/nanopi_m3_defconfig b/configs/nanopi_m3_defconfig
new file mode 100644
index 0000000000..148ff1a8b9
--- /dev/null
+++ b/configs/nanopi_m3_defconfig
@@ -0,0 +1,12 @@
+CONFIG_ARM=y
+CONFIG_ARCH_NEXELL=y
+# CONFIG_DISPLAY_CPUINFO is not set
+# CONFIG_CMD_FLASH is not set
+# CONFIG_SYS_ARCH_TIMER is not set
+CONFIG_DEFAULT_DEVICE_TREE="s5p6818-nanopi-m3"
+CONFIG_HUSH_PARSER=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
diff --git a/include/configs/s5p6818.h b/include/configs/s5p6818.h
index 4d394dbec9..dff4736e20 100644
--- a/include/configs/s5p6818.h
+++ b/include/configs/s5p6818.h
@@ -30,4 +30,6 @@
 
 #define CONFIG_SYS_TIMER_COUNTER	0xc0017040	/* TCNTO4 */
 
+#define CONFIG_BOUNCE_BUFFER
+
 #endif	/* __CONFIG_H */
-- 
2.14.1