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driver: mtd: sf_ops: claim bus while doing memcpy

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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>
This commit is contained in:
Poddar, Sourav 2013-11-14 21:01:15 +05:30 committed by Jagannadha Sutradharudu Teki
parent 2c57b03bab
commit ac5cce38de
1 changed files with 6 additions and 0 deletions
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6
drivers/mtd/spi/sf_ops.c
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@ -273,9 +273,15 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
/* Handle memory-mapped SPI */ /* Handle memory-mapped SPI */
if (flash->memory_map) { 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); spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP);
memcpy(data, flash->memory_map + offset, len); memcpy(data, flash->memory_map + offset, len);
spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP_END); spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP_END);
spi_release_bus(flash->spi);
return 0; return 0;
} }