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| author | Sudhakar Rajashekhara <sudhakar.raj@ti.com> | 2010-08-09 14:16:38 +0400 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2010-09-24 18:40:27 +0400 |
| commit | 217f13662f291d8eaac5a3dfd7ba35be0a91c9fc (patch) | |
| tree | 025191f7a378ba3868a836cc020791e3fc680475 /arch/arm/mach-davinci | |
| parent | fe69c82d0862f54b1a5aa5ece046468b4e76b40c (diff) | |
| download | linux-217f13662f291d8eaac5a3dfd7ba35be0a91c9fc.tar.xz | |
davinci: am17x/da830/omap-l137 evm: setup NAND flash timing
Setup the NAND flash timings for DA830 EVM.
Before configuring the timing values, throughput calculation
using dd command yielded 477 kB/s write and 970 kB/s read speed.
After the timing configuration, the throughput was measured to
be 2.5 MB/s write and 5.1 MB/s read.
[Mukul Bhatnagar: actual calculation of timing values from the
NAND datasheet]
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Cc: Mukul Bhatnagar <mbhatnagar@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci')
| -rw-r--r-- | arch/arm/mach-davinci/board-da830-evm.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/board-da830-evm.c b/arch/arm/mach-davinci/board-da830-evm.c index 292e8b7c02ac..de82739c00ec 100644 --- a/arch/arm/mach-davinci/board-da830-evm.c +++ b/arch/arm/mach-davinci/board-da830-evm.c @@ -29,6 +29,7 @@ #include <mach/nand.h> #include <mach/da8xx.h> #include <mach/usb.h> +#include <mach/aemif.h> #define DA830_EVM_PHY_MASK 0x0 #define DA830_EVM_MDIO_FREQUENCY 2200000 /* PHY bus frequency */ @@ -360,6 +361,16 @@ static struct nand_bbt_descr da830_evm_nand_bbt_mirror_descr = { .pattern = da830_evm_nand_mirror_pattern }; +static struct davinci_aemif_timing da830_evm_nandflash_timing = { + .wsetup = 24, + .wstrobe = 21, + .whold = 14, + .rsetup = 19, + .rstrobe = 50, + .rhold = 0, + .ta = 20, +}; + static struct davinci_nand_pdata da830_evm_nand_pdata = { .parts = da830_evm_nand_partitions, .nr_parts = ARRAY_SIZE(da830_evm_nand_partitions), @@ -368,6 +379,7 @@ static struct davinci_nand_pdata da830_evm_nand_pdata = { .options = NAND_USE_FLASH_BBT, .bbt_td = &da830_evm_nand_bbt_main_descr, .bbt_md = &da830_evm_nand_bbt_mirror_descr, + .timing = &da830_evm_nandflash_timing, }; static struct resource da830_evm_nand_resources[] = { |