diff options
| author | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2014-01-07 00:11:35 +0530 |
|---|---|---|
| committer | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2014-01-12 21:40:22 +0530 |
| commit | 056fbc73d54df64adcb93c513cba708acb2683bd (patch) | |
| tree | 4243a3f6eb6f1a2fabc57cdad08031fc4e351cd6 /drivers/mtd/spi/sf_ops.c | |
| parent | f77f469117ab3184ac45683a50dc446265be28cc (diff) | |
sf: Add dual memories support - DUAL_PARALLEL
This patch added support for accessing dual memories in
parallel connection with single chipselect line from controller.
For more info - see doc/SPI/README.dual-flash
Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Diffstat (limited to 'drivers/mtd/spi/sf_ops.c')
| -rw-r--r-- | drivers/mtd/spi/sf_ops.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c index e877858a91..843f379ef1 100644 --- a/drivers/mtd/spi/sf_ops.c +++ b/drivers/mtd/spi/sf_ops.c @@ -119,7 +119,7 @@ static int spi_flash_bank(struct spi_flash *flash, u32 offset) u8 bank_sel; int ret; - bank_sel = offset / SPI_FLASH_16MB_BOUN; + bank_sel = offset / (SPI_FLASH_16MB_BOUN << flash->shift); ret = spi_flash_cmd_bankaddr_write(flash, bank_sel); if (ret) { @@ -142,6 +142,9 @@ static void spi_flash_dual_flash(struct spi_flash *flash, u32 *addr) flash->spi->flags &= ~SPI_XFER_U_PAGE; } break; + case SF_DUAL_PARALLEL_FLASH: + *addr >>= flash->shift; + break; default: debug("SF: Unsupported dual_flash=%d\n", flash->dual_flash); break; @@ -388,7 +391,8 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset, if (bank_sel < 0) return ret; #endif - remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1)) - offset; + remain_len = ((SPI_FLASH_16MB_BOUN << flash->shift) * + (bank_sel + 1)) - offset; if (len < remain_len) read_len = len; else |