this is usefull for custom boards with different NAND flashs
(for informations u-boot defaults chip_delay to 75)
Signed-off-by: Eric Bénard <eric@xxxxxxxxxx>
---
arch/arm/mach-at91/include/mach/board.h | 1 +
drivers/mtd/nand/atmel_nand.c | 5 ++++-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-at91/include/mach/board.h b/arch/arm/mach-at91/include/mach/board.h
index aa0fdae..4e6fa8b 100644
--- a/arch/arm/mach-at91/include/mach/board.h
+++ b/arch/arm/mach-at91/include/mach/board.h
@@ -64,6 +64,7 @@ struct atmel_nand_data {
u8 ecc_mode; /* NAND_ECC_* */
u8 on_flash_bbt; /* Use flash based bbt */
u8 bus_on_d0;
+ int chip_delay;
u8 pmecc_corr_cap;
u16 pmecc_sector_size;
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 658ae52..2ff7427 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -1161,7 +1161,10 @@ static int __init atmel_nand_probe(struct device_d *dev)
nand_chip->ecc.mode = NAND_ECC_HW;
}
- nand_chip->chip_delay = 20; /* 20us command delay time */
+ if (host->board->chip_delay > 0)
+ nand_chip->chip_delay = host->board->chip_delay;
+ else
+ nand_chip->chip_delay = 20; /* 20us command delay time */
if (host->board->bus_width_16) { /* 16-bit bus width */
nand_chip->options |= NAND_BUSWIDTH_16;
--
1.8.3.1
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