From 18a8505cc130448c8c0a29a46573b46697bf0e42 Mon Sep 17 00:00:00 2001 From: Sekhar Nori Date: Mon, 9 Aug 2010 15:46:39 +0530 Subject: [PATCH] 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 Cc: Mukul Bhatnagar Acked-by: Kevin Hilman Signed-off-by: Kevin Hilman --- arch/arm/mach-davinci/board-da850-evm.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) 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 #include #include +#include #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[] = { -- 2.7.4