On 30 July 2015 at 11:04, Vignesh R <vigne...@ti.com> wrote:
> From: Tom Rini <tr...@ti.com>
>
> When doing a memory mapped copy we may have DMA available and thus need
> to have this copy abstracted so that the driver can do it, rather than a
> simple memcpy.
>
> Signed-off-by: Tom Rini <tr...@ti.com>
> Signed-off-by: Vignesh R <vigne...@ti.com>
> ---
Reviewed-by: Jagan Teki <jt...@openedev.com>
> drivers/mtd/spi/sf_ops.c | 8 +++++++-
> include/spi.h | 3 +++
> 2 files changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c
> index 38592f518b72..900ec1f2a9ce 100644
> --- a/drivers/mtd/spi/sf_ops.c
> +++ b/drivers/mtd/spi/sf_ops.c
> @@ -14,6 +14,7 @@
> #include <spi.h>
> #include <spi_flash.h>
> #include <watchdog.h>
> +#include <linux/compiler.h>
>
> #include "sf_internal.h"
>
> @@ -378,6 +379,11 @@ int spi_flash_read_common(struct spi_flash *flash, const
> u8 *cmd,
> return ret;
> }
>
> +void __weak spi_flash_copy_mmap(void *data, void *offset, size_t len)
> +{
> + memcpy(data, offset, len);
> +}
> +
> int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
> size_t len, void *data)
> {
> @@ -394,7 +400,7 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32
> offset,
> return ret;
> }
> spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP);
> - memcpy(data, flash->memory_map + offset, len);
> + spi_flash_copy_mmap(data, flash->memory_map + offset, len);
> spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP_END);
> spi_release_bus(flash->spi);
> return 0;
> diff --git a/include/spi.h b/include/spi.h
> index 18362364cf0e..51fdfd6d7360 100644
> --- a/include/spi.h
> +++ b/include/spi.h
> @@ -272,6 +272,9 @@ int spi_set_wordlen(struct spi_slave *slave, unsigned int
> wordlen);
> int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
> void *din, unsigned long flags);
>
> +/* Copy memory mapped data */
> +void spi_flash_copy_mmap(void *data, void *offset, size_t len);
> +
> /**
> * Determine if a SPI chipselect is valid.
> * This function is provided by the board if the low-level SPI driver
> --
> 2.5.0
>
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thanks!
--
Jagan | openedev.
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