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From: Bin Meng <bmeng.cn@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 1/5] sf: Add status register protection mechanism
Date: Tue, 11 Oct 2016 10:05:11 +0800	[thread overview]
Message-ID: <CAEUhbmW6-mCzB4j+ZRqQ3DBozX6TV_+O2SFcKmaJfYk+12J+OQ@mail.gmail.com> (raw)
In-Reply-To: <20161010185801.27991-2-george.mccollister@gmail.com>

On Tue, Oct 11, 2016 at 2:57 AM, George McCollister
<george.mccollister@gmail.com> wrote:
> Many SPI NOR flash devices support status register protection through
> one or two status register protection bits. Status register protection
> enables protection of block protect and other bits from manipulation.
>
> So far, four different status register protection methods have been
> observed:
>
>  Software         - Writes to the status register are blocked until
>                     a write enable bit is set by software.
>  Hardware         - Writes to the status register are blocked while
>                     a pin is in a certain state.
>  Power            - Writes to the status register are blocked until
>                     the next power-down.
>  One Time Program - Writes to the status register are permanently
>                     blocked.
>
> Signed-off-by: George McCollister <george.mccollister@gmail.com>
> ---
>  include/spi_flash.h | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
>

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

  reply	other threads:[~2016-10-11  2:05 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-10 18:57 [U-Boot] [PATCH 0/5] sf: Add support for status register protect George McCollister
2016-10-10 18:57 ` [U-Boot] [PATCH 1/5] sf: Add status register protection mechanism George McCollister
2016-10-11  2:05   ` Bin Meng [this message]
2016-10-10 18:57 ` [U-Boot] [PATCH 2/5] sf: Add status register protect for STMICRO, SST George McCollister
2016-10-11  2:05   ` Bin Meng
2016-10-10 18:57 ` [U-Boot] [PATCH 3/5] sf: Use stm_lock/unlock for Spansion and Winbond George McCollister
2016-10-11  2:05   ` Bin Meng
2016-10-10 18:58 ` [U-Boot] [PATCH 4/5] sf: Add status register protect for Winbond George McCollister
2016-10-11  2:05   ` Bin Meng
2016-10-10 18:58 ` [U-Boot] [PATCH 5/5] sf: Add sr-protect sub-command George McCollister
2016-10-11  2:05   ` Bin Meng
2016-10-28 17:06 ` [U-Boot] [PATCH 0/5] sf: Add support for status register protect George McCollister
2016-10-28 17:24   ` Jagan Teki

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