[U-Boot] [PATCH v3] sf: Fix to compute proper sector_size

[Jagan Teki <jagannadh.teki@gmail.com>]

On 27 April 2015 at 21:06, Jagannadha Sutradharudu Teki
<jagannadh.teki@gmail.com> wrote:
> Upto now flash sector_size is assigned from params which isn't
> necessarily a sector size from vendor, so based on the SECT_*
> flags from flash_params the erase_size will compute and it will
> become the sector_size finally.
>
> Bug report (from Bin Meng):
> => sf probe
> SF: Detected SST25VF016B with page size 256 Bytes, erase size 4 KiB,
> total 2 MiB, mapped at ffe00000
>
> => sf erase 0 +100
> SF: 65536 bytes @ 0x0 Erased: OK
>
> Signed-off-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
> Reported-by: Bin Meng <bmeng.cn@gmail.com>
> Tested-by: Bin Meng <bmeng.cn@gmail.com>
> ---
> Changes for v3:
>         - Updated comments
> Changes for v2:
>         - Minimize the code logic
>
>  drivers/mtd/spi/sf_internal.h | 3 ++-
>  drivers/mtd/spi/sf_probe.c    | 3 +++
>  2 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h
> index bd834dc..4158e13 100644
> --- a/drivers/mtd/spi/sf_internal.h
> +++ b/drivers/mtd/spi/sf_internal.h
> @@ -119,7 +119,8 @@ int sst_write_bp(struct spi_flash *flash, u32 offset, size_t len,
>   * @name:              Device name ([MANUFLETTER][DEVTYPE][DENSITY][EXTRAINFO])
>   * @jedec:             Device jedec ID (0x[1byte_manuf_id][2byte_dev_id])
>   * @ext_jedec:         Device ext_jedec ID
> - * @sector_size:       Sector size of this device
> + * @sector_size:       Isn't necessarily a sector size from vendor,
> + *                     the size listed here is what works with CMD_ERASE_64K
>   * @nr_sectors:        No.of sectors on this device
>   * @e_rd_cmd:          Enum list for read commands
>   * @flags:             Important param, for flash specific behaviour
> diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c
> index de8d0b7..3f6b882 100644
> --- a/drivers/mtd/spi/sf_probe.c
> +++ b/drivers/mtd/spi/sf_probe.c
> @@ -184,6 +184,9 @@ static int spi_flash_validate_params(struct spi_slave *spi, u8 *idcode,
>                 flash->erase_size = flash->sector_size;
>         }
>
> +       /* Now erase size becomes valid sector size */
> +       flash->sector_size = flash->erase_size;
> +
>         /* Look for the fastest read cmd */
>         cmd = fls(params->e_rd_cmd & flash->spi->op_mode_rx);
>         if (cmd) {
> --
> 1.9.1
>

Applied to u-boot-spi/master

thanks!
-- 
Jagan.