[PATCH] sf: Querying write-protect status before operating the flash

[Tom Rini]

On Wed, Nov 03, 2021 at 01:18:42PM +0100, Jan Kiszka wrote:
> On 04.10.21 15:36, Jan Kiszka wrote:
> > On 13.09.21 09:48, Jan Kiszka wrote:
> >> Hi all,
> >>
> >> Chao, please no top-post on mailing list. Also check your mail client,
> >> it seems to inject a lot of bogus newlines.
> >>
> >> On 08.09.21 06:55, chaochao2021666 wrote:
> >>>
> >>>
> >>>
> >>> HI Jagan
> >>>
> >>>
> >>>
> >>> sorry for the delay response.
> >>>
> >>>
> >>> And I have checked the maser. There is still a problem with this feature。
> >>>
> >>>
> >>> reproduce steps:
> >>> 1. enable the flash protect function
> >>> 2. using sf cmd to erase the flash. I can get the erase "OK",not the "error".
> >>>
> >>>
> >>>
> >>> I think the root cause is that the detection mechanism is missing and to judge the permissions of the action
> >>>
> >>> So pull this PR to improve the erase flow
> >>>
> >>>
> >>> another question:
> >>> how can I visit the  u-boot-spi/next? do there any link?
> >>>
> >>
> >> See MAINTAINERS: https://source.denx.de/u-boot/custodians/u-boot-spi.git
> >>
> >> But also that tree contains no usage of the flash_is_locked callback.
> >> That was once evaluated by drivers/mtd/spi/spi_flash.c but then
> >> forgotten in the new SPI NOR framework it seems.
> >>
> >> Chao's patch makes sense to me to restore this feature.
> >>
> >> Jan
> >>
> >>>
> >>>
> >>>
> >>>
> >>> BRs
> >>> Chao
> >>>
> >>>
> >>>
> >>> At 2021-06-29 21:50:28, "Jagan Teki" <jagan at amarulasolutions.com> wrote:
> >>>> On Tue, Jun 22, 2021 at 10:51 AM chao zeng <chaochao2021666 at 163.com> wrote:
> >>>>>
> >>>>> From: Chao Zeng <chao.zeng at siemens.com>
> >>>>>
> >>>>> When operating the write-protection flash,spi_flash_std_write() and
> >>>>> spi_flash_std_erase() would return wrong result.The flash is protected,
> >>>>> but write or erase the flash would show "OK".
> >>>>>
> >>>>> Check the flash write protection state if the write-protection has enbale
> >>>>> before operating the flash.
> >>>>>
> >>>>> Signed-off-by: Chao Zeng <chao.zeng at siemens.com>
> >>>>> ---
> >>>>
> >>>> Does it broken on master? if yes can you check in u-boot-spi/next?
> >>>>
> >>>> Jagan.
> >>
> > 
> > Ping - how do we proceed here?
> > 
> > Jan
> > 
> 
> Ping² - who can help to move this forward?

I've put this in my to-watch bundle, if Jagan doesn't chime in soon.
Thanks!

-- 
Tom
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