[U-Boot] [PATCH 4/5] sf: Add status register protect for Winbond

[Bin Meng]

On Tue, Oct 11, 2016 at 2:58 AM, George McCollister
<george.mccollister at gmail.com> wrote:
> Winbond parts such as W25Q64FV and Spansion parts such as S25FL128S
> support two status register protection bits. Implement sr_protect for
> Winbond and Spansion devices.
>
>  -------------------------------------------------------
>  | SRP1 | SRP0 | Method   | Description                |
>  -------------------------|-----------------------------
>  | 0    | 0    | Software | Blocked until write enable |
>  | 0    | 1    | Hardware | Blocked if WP pin is low   |
>  | 1    | 0    | Power    | Blocked until power down   |
>  | 1    | 1    | OTP      | Blocked permanently        |
>  -------------------------------------------------------
>
> Not all devices support OTP.
>
> Signed-off-by: George McCollister <george.mccollister at gmail.com>
> ---
>  drivers/mtd/spi/sf_internal.h |  1 +
>  drivers/mtd/spi/spi_flash.c   | 57 +++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 58 insertions(+)
>

Reviewed-by: Bin Meng <bmeng.cn at gmail.com>