davinci: dm6467t evm: setup NAND flash timing

Setup NAND flash timing on DM6467T EVM.

Without the timing setup, the NAND flash on DM6467T
RevC EVM reports a number of random bad blocks because
of read errors.

Also, with this, copying a 100M file on RevB EVM takes
~35 sec against 1 minute 30 seconds earlier.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

diff --git a/arch/arm/mach-davinci/board-dm646x-evm.c b/arch/arm/mach-davinci/board-dm646x-evm.c
index 4502f346b2b04fe45550bdd4dc4742281ce92aab..5a29955b2f5cb95cc4a869fcb2bd81ca9b8a0e41 100644 (file)
--- a/arch/arm/mach-davinci/board-dm646x-evm.c
+++ b/arch/arm/mach-davinci/board-dm646x-evm.c
@@ -42,6 +42,7 @@
 #include <mach/nand.h>
 #include <mach/clock.h>
 #include <mach/cdce949.h>
+#include <mach/aemif.h>
 
 #include "clock.h"
 
@@ -71,6 +72,16 @@ static struct mtd_partition davinci_nand_partitions[] = {
        }
 };
 
+static struct davinci_aemif_timing dm6467tevm_nandflash_timing = {
+       .wsetup         = 29,
+       .wstrobe        = 24,
+       .whold          = 14,
+       .rsetup         = 19,
+       .rstrobe        = 33,
+       .rhold          = 0,
+       .ta             = 29,
+};
+
 static struct davinci_nand_pdata davinci_nand_data = {
        .mask_cle               = 0x80000,
        .mask_ale               = 0x40000,
@@ -763,6 +774,9 @@ static __init void evm_init(void)
        dm646x_init_mcasp0(&dm646x_evm_snd_data[0]);
        dm646x_init_mcasp1(&dm646x_evm_snd_data[1]);
 
+       if (machine_is_davinci_dm6467tevm())
+               davinci_nand_data.timing = &dm6467tevm_nandflash_timing;
+
        platform_device_register(&davinci_nand_device);
 
        dm646x_init_edma(dm646x_edma_rsv);