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| author | Sekhar Nori <nsekhar@ti.com> | 2010-08-09 15:46:39 +0530 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2010-09-24 07:40:27 -0700 |
| commit | 18a8505cc130448c8c0a29a46573b46697bf0e42 (patch) | |
| tree | 87ab67fecc0ffa2ebbf1f9644ba902cff2de0220 /arch | |
| parent | 217f13662f291d8eaac5a3dfd7ba35be0a91c9fc (diff) | |
| download | op-kernel-dev-18a8505cc130448c8c0a29a46573b46697bf0e42.zip op-kernel-dev-18a8505cc130448c8c0a29a46573b46697bf0e42.tar.gz | |
davinci: am18x/da850/omap-l138 evm: setup NAND flash timing
Setup the NAND flash timings for DA850 EVM
Before configuring the timing values, throughput calculation
using dd command yielded 469 kB/s write and 966 kB/s read speed.
After the timing configuration, the throughput was measured to
be 2.4 MB/s write and 5 MB/s read.
[Mukul Bhatnagar: actual calculation of timing values from the
NAND datasheet]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Cc: Mukul Bhatnagar <mbhatnagar@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-davinci/board-da850-evm.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c index 190ebd3..c1d45d7 100644 --- a/arch/arm/mach-davinci/board-da850-evm.c +++ b/arch/arm/mach-davinci/board-da850-evm.c @@ -36,6 +36,7 @@ #include <mach/da8xx.h> #include <mach/nand.h> #include <mach/mux.h> +#include <mach/aemif.h> #define DA850_EVM_PHY_MASK 0x1 #define DA850_EVM_MDIO_FREQUENCY 2200000 /* PHY bus frequency */ @@ -143,12 +144,23 @@ static struct mtd_partition da850_evm_nandflash_partition[] = { }, }; +static struct davinci_aemif_timing da850_evm_nandflash_timing = { + .wsetup = 24, + .wstrobe = 21, + .whold = 14, + .rsetup = 19, + .rstrobe = 50, + .rhold = 0, + .ta = 20, +}; + static struct davinci_nand_pdata da850_evm_nandflash_data = { .parts = da850_evm_nandflash_partition, .nr_parts = ARRAY_SIZE(da850_evm_nandflash_partition), .ecc_mode = NAND_ECC_HW, .ecc_bits = 4, .options = NAND_USE_FLASH_BBT, + .timing = &da850_evm_nandflash_timing, }; static struct resource da850_evm_nandflash_resource[] = { |
