1 files changed, 36 insertions, 6 deletions

diff --git a/arch/arm/mach-davinci/board-dm644x-evm.c b/arch/arm/mach-davinci/board-dm644x-evm.c
index 5387e6b20405..c039674fe99e 100644
--- a/arch/arm/mach-davinci/board-dm644x-evm.c
+++ b/arch/arm/mach-davinci/board-dm644x-evm.c
@@ -16,11 +16,12 @@
 #include <linux/gpio.h>
 #include <linux/leds.h>
 #include <linux/memory.h>
+#include <linux/etherdevice.h>
 
 #include <linux/i2c.h>
 #include <linux/i2c/pcf857x.h>
 #include <linux/i2c/at24.h>
-#include <linux/etherdevice.h>
+
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
 #include <linux/mtd/partitions.h>
@@ -113,20 +114,49 @@ static struct platform_device davinci_evm_norflash_device = {
         .resource       = &davinci_evm_norflash_resource,
 };
 
+/* DM644x EVM includes a 64 MByte small-page NAND flash (16K blocks).
+ * It may used instead of the (default) NOR chip to boot, using TI's
+ * tools to install the secondary boot loader (UBL) and U-Boot.
+ */
 struct mtd_partition davinci_evm_nandflash_partition[] = {
-        /* 5 MB space at the beginning for bootloader and kernel */
+        /* Bootloader layout depends on whose u-boot is installed, but we
+         * can hide all the details.
+         *  - block 0 for u-boot environment ... in mainline u-boot
+         *  - block 1 for UBL (plus up to four backup copies in blocks 2..5)
+         *  - blocks 6...? for u-boot
+         *  - blocks 16..23 for u-boot environment ... in TI's u-boot
+         */
+        {
+                .name           = "bootloader",
+                .offset         = 0,
+                .size           = SZ_256K + SZ_128K,
+                .mask_flags     = MTD_WRITEABLE,        /* force read-only */
+        },
+        /* Kernel */
         {
-                .name           = "NAND filesystem",
-                .offset         = 5 * SZ_1M,
+                .name           = "kernel",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = SZ_4M,
+                .mask_flags     = 0,
+        },
+        /* File system (older GIT kernels started this on the 5MB mark) */
+        {
+                .name           = "filesystem",
+                .offset         = MTDPART_OFS_APPEND,
                 .size           = MTDPART_SIZ_FULL,
                 .mask_flags     = 0,
         }
+        /* A few blocks at end hold a flash BBT ... created by TI's CCS
+         * using flashwriter_nand.out, but ignored by TI's versions of
+         * Linux and u-boot.  We boot faster by using them.
+         */
 };
 
 static struct davinci_nand_pdata davinci_evm_nandflash_data = {
         .parts          = davinci_evm_nandflash_partition,
         .nr_parts       = ARRAY_SIZE(davinci_evm_nandflash_partition),
         .ecc_mode       = NAND_ECC_HW,
+        .options        = NAND_USE_FLASH_BBT,
 };
 
 static struct resource davinci_evm_nandflash_resource[] = {
@@ -151,14 +181,14 @@ static struct platform_device davinci_evm_nandflash_device = {
         .resource       = davinci_evm_nandflash_resource,
 };
 
-static u64 davinci_fb_dma_mask = DMA_32BIT_MASK;
+static u64 davinci_fb_dma_mask = DMA_BIT_MASK(32);
 
 static struct platform_device davinci_fb_device = {
         .name           = "davincifb",
         .id             = -1,
         .dev = {
                 .dma_mask               = &davinci_fb_dma_mask,
-                .coherent_dma_mask      = DMA_32BIT_MASK,
+                .coherent_dma_mask      = DMA_BIT_MASK(32),
         },
         .num_resources = 0,
 };