diff options
| author | Poddar, Sourav <sourav.poddar@ti.com> | 2013-11-14 21:01:15 +0530 |
|---|---|---|
| committer | Jagannadha Sutradharudu Teki <jaganna@xilinx.com> | 2013-12-19 12:23:22 +0530 |
| commit | ac5cce38de8f97a120b8c98f34be0d5eec50a6fb (patch) | |
| tree | 74d5d9b3302c59998ced38d04347a3ae6458439c /drivers | |
| parent | 2c57b03bab960b77303043cb9736050173d36fb9 (diff) | |
driver: mtd: sf_ops: claim bus while doing memcpy
claim spi bus while doing memory copy, this will set up
the spi controller device control register before doing
a memory read.
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Tested-by: Yebio Mesfin <ymesfin@ti.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/spi/sf_ops.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c index 108665f441..e316a692a8 100644 --- a/drivers/mtd/spi/sf_ops.c +++ b/drivers/mtd/spi/sf_ops.c @@ -273,9 +273,15 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset, /* Handle memory-mapped SPI */ if (flash->memory_map) { + ret = spi_claim_bus(flash->spi); + if (ret) { + debug("SF: unable to claim SPI bus\n"); + return ret; + } spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP); memcpy(data, flash->memory_map + offset, len); spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP_END); + spi_release_bus(flash->spi); return 0; } |