mtd: nand: Add the sunxi NAND controller driver

We already have an SPL driver for the sunxi NAND controller, now add
the normal/standard one.

The source has been copied from Linux 4.6 with a few changes to make
it work in u-boot.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>

board/sunxi/board.c

@@ -136,7 +136,7 @@ int dram_init(void)
 	return 0;
 }
 
-#if defined(CONFIG_NAND_SUNXI) && defined(CONFIG_SPL_BUILD)
+#if defined(CONFIG_NAND_SUNXI)
 static void nand_pinmux_setup(void)
 {
 	unsigned int pin;
@@ -173,6 +173,9 @@ void board_nand_init(void)
 {
 	nand_pinmux_setup();
 	nand_clock_setup();
+#ifndef CONFIG_SPL_BUILD
+	sunxi_nand_init();
+#endif
 }
 #endif
 

drivers/mtd/nand/Kconfig

@@ -64,12 +64,14 @@ config NAND_PXA3XX
 	  PXA3xx processors (NFCv1) and also on Armada 370/XP (NFCv2).
 
 config NAND_SUNXI
-	bool "Support for NAND on Allwinner SoCs in SPL"
+	bool "Support for NAND on Allwinner SoCs"
 	depends on MACH_SUN4I || MACH_SUN5I || MACH_SUN7I
 	select SYS_NAND_SELF_INIT
 	---help---
-	Enable support for NAND. This option allows SPL to read from
+	Enable support for NAND. This option enables the standard and
-	sunxi NAND using DMA transfers.
+	SPL drivers.
+	The SPL driver only supports reading from the NAND using DMA
+	transfers.
 
 config NAND_ARASAN
 	bool "Configure Arasan Nand"

drivers/mtd/nand/Makefile

@@ -66,6 +66,7 @@ obj-$(CONFIG_TEGRA_NAND) += tegra_nand.o
 obj-$(CONFIG_NAND_OMAP_GPMC) += omap_gpmc.o
 obj-$(CONFIG_NAND_OMAP_ELM) += omap_elm.o
 obj-$(CONFIG_NAND_PLAT) += nand_plat.o
+obj-$(CONFIG_NAND_SUNXI) += sunxi_nand.o
 
 else  # minimal SPL drivers
 

include/configs/sunxi-common.h

@@ -135,6 +135,8 @@
 
 #ifdef CONFIG_NAND_SUNXI
 #define CONFIG_SPL_NAND_SUPPORT 1
+#define CONFIG_SYS_NAND_ONFI_DETECTION
+#define CONFIG_SYS_MAX_NAND_DEVICE 8
 #endif
 
 #ifdef CONFIG_SPL_SPI_SUNXI

include/fdtdec.h

@@ -155,6 +155,7 @@ enum fdt_compat_id {
 	COMPAT_INTEL_BAYTRAIL_FSP,	/* Intel Bay Trail FSP */
 	COMPAT_INTEL_BAYTRAIL_FSP_MDP,	/* Intel FSP memory-down params */
 	COMPAT_INTEL_IVYBRIDGE_FSP,	/* Intel Ivy Bridge FSP */
+	COMPAT_SUNXI_NAND,		/* SUNXI NAND controller */
 
 	COMPAT_COUNT,
 };

include/nand.h

@@ -142,3 +142,6 @@ __attribute__((noreturn)) void nand_boot(void);
 int get_nand_env_oob(struct mtd_info *mtd, unsigned long *result);
 #endif
 int spl_nand_erase_one(int block, int page);
+
+/* platform specific init functions */
+void sunxi_nand_init(void);

lib/fdtdec.c

@@ -65,6 +65,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
 	COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
 	COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
 	COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
+	COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"),
 };
 
 const char *fdtdec_get_compatible(enum fdt_compat_id id)