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authorSudhakar Rajashekhara <sudhakar.raj@ti.com>2010-08-09 15:46:38 +0530
committerKevin Hilman <khilman@deeprootsystems.com>2010-09-24 07:40:27 -0700
commit217f13662f291d8eaac5a3dfd7ba35be0a91c9fc (patch)
tree025191f7a378ba3868a836cc020791e3fc680475 /arch/arm/mach-davinci/board-da830-evm.c
parentfe69c82d0862f54b1a5aa5ece046468b4e76b40c (diff)
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/board-da830-evm.c')
-rw-r--r--arch/arm/mach-davinci/board-da830-evm.c12
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[] = {