Re: [PATCH] Module argument to control whether intel-spi-pci attempts to turn the SPI flash chip writeable
From: Mika Westerberg
Date: Mon Aug 03 2020 - 09:05:47 EST
On Mon, Aug 03, 2020 at 09:58:23AM -0300, Daniel Gutson wrote:
> On Mon, Aug 3, 2020 at 7:27 AM Mika Westerberg
> <mika.westerberg@xxxxxxxxxxxxxxx> wrote:
> > On Mon, Aug 03, 2020 at 11:18:12AM +0100, Richard Hughes wrote:
> > > On Mon, 3 Aug 2020 at 10:57, Mika Westerberg
> > > <mika.westerberg@xxxxxxxxxxxxxxx> wrote:
> > > > I think instead of this we should simply make it so that the driver
> > > > never tries to make the chip writable.
> > >
> > > I think this is a good idea, but I wasn't sure if it was an acceptable
> > > behaviour change. Should the driver still try to set BCR_WPD when
> > > writing an image (i.e. defer the setting of write enable until later),
> > > or just not set the BCR register at all? I think your last comment was
> > > the latter, but wanted to check.
> > I would say not set it at all. I think it was (my) mistake to set it in
> > the first place.
> Do you want me to remove the module parameter from intel-spi too and
> do the same?
No, I think that should still be left there. Then by default it is
read-only and you can only enable writing if the BIOS allows it and that
the user actually requested it.