On Mon, Mar 11, 2019 at 4:51 PM Peter Robinson <pbrobinson(a)gmail.com> wrote:
On Mon, Mar 11, 2019 at 3:18 PM Justin Forbes
<jmforbes(a)linuxtx.org>
wrote:
>
> On Mon, Mar 11, 2019 at 8:34 AM Prarit Bhargava <prarit(a)redhat.com>
wrote:
> >
> > On 3/10/19 5:53 PM, Peter Robinson wrote:
> > > On Sun, Mar 10, 2019 at 9:46 PM Christoph M.
<christophm30(a)gmail.com>
wrote:
> > >>
> > >>
> > >> On Sun, Mar 10, 2019 at 10:39 PM Peter Robinson <
pbrobinson(a)gmail.com> wrote:
> > >>>
> > >>>> Hi Fedora kernel team,
> > >>>>
> > >>>> I'd like to access SPI devices via the spidev user API
([1]) on
my Fedora
> > >>>> system.
> > >>>> Would it be possible to enable CONFIG_SPI_SPIDEV (module would
be
fair
> > >>>> enough),
> > >>>> so that I don't have to build my own kernel?
> > >>>
> > >>> Which architectures or sort of device?
> > >>
> > >>
> > >> I'd like to have that for x86-64 (I want to control an
SPI-attached
display).
> > >
> > > Any particular drivers? Or just SPI_SPIDEV
> >
> > FWIW, in RHEL we have
> >
> > ./redhat/configs/debug/aarch64/CONFIG_SPI_DEBUG:CONFIG_SPI_DEBUG=y
> > ./redhat/configs/generic/aarch64/CONFIG_SPI:CONFIG_SPI=y
> >
./redhat/configs/generic/aarch64/CONFIG_SPI_CADENCE:CONFIG_SPI_CADENCE=m
> > ./redhat/configs/generic/aarch64/CONFIG_SPI_MASTER:CONFIG_SPI_MASTER=y
> > ./redhat/configs/generic/aarch64/CONFIG_SPI_PL022:CONFIG_SPI_PL022=m
> > ./redhat/configs/generic/aarch64/CONFIG_SPI_QUP:CONFIG_SPI_QUP=y
> > ./redhat/configs/generic/aarch64/CONFIG_SPI_XLP:CONFIG_SPI_XLP=m
> > ./redhat/configs/generic/x86_64/CONFIG_SPI:CONFIG_SPI=y
> >
> I don't have a problem with these going in the 5.0 rebase.
We already have it all enabled on aarch64, and Arm in general, I
actually question how useful the RHEL config is on non aarch64 as it
doesn't enable CONFIG_SPI_SPIDEV or CONFIG_SPI_MASTER which I think
are generally needed for it to be useful, but maybe CONFIG_SPI enables
them, I've not looked.
CONFIG_SPI is required for any CONFIG_SPI*.
CONFIG_SPI_MASTER is required for CONFIG_SPI_SPIDEV.
https://elixir.bootlin.com/linux/latest/source/drivers/spi/Kconfig#L25
BR
Christoph