On Wed, Aug 26, 2020 at 10:13 AM Matthias Schiffer
wrote:
> Using GPIOs for chipselect would require different pinmuxing. Also, why
> use GPIOs, when the SPI controller has this built in?
In the initial chips with the ECSPI controller there was a bug with
the native chipselect controller and we
On Wed, 2020-08-26 at 10:01 -0300, Fabio Estevam wrote:
> On Wed, Aug 26, 2020 at 8:54 AM Matthias Schiffer
> wrote:
>
> > Before 8cdcd8aeee281, num_chipselect was set to 3 for spi0 and to 1
> > for
> > spi1 in arch/arm/mach-imx/mach-mx31lite.c. My understanding is that
> > it
> > would make sens
On Wed, Aug 26, 2020 at 8:54 AM Matthias Schiffer
wrote:
> Before 8cdcd8aeee281, num_chipselect was set to 3 for spi0 and to 1 for
> spi1 in arch/arm/mach-imx/mach-mx31lite.c. My understanding is that it
> would make sense to add this as num-cs to
> arch/arm/boot/dts/imx31-lite.dts.
Or just pass
On Wed, 2020-08-26 at 07:59 -0300, Fabio Estevam wrote:
> Hi Matthias,
>
> On Wed, Aug 26, 2020 at 7:32 AM Matthias Schiffer
> wrote:
>
> > But the previous platform data that was removed in 8cdcd8aeee281
> > ("spi:
> > imx/fsl-lpspi: Convert to GPIO descriptors") set different values
> > for
>
Hi Matthias,
On Wed, Aug 26, 2020 at 7:32 AM Matthias Schiffer
wrote:
> But the previous platform data that was removed in 8cdcd8aeee281 ("spi:
> imx/fsl-lpspi: Convert to GPIO descriptors") set different values for
> different boards. So maybe some DTS should be using num-cs?
Could you provide
On Wed, 2020-08-26 at 12:32 +0200, Matthias Schiffer wrote:
> On Tue, 2020-08-25 at 14:16 -0300, Fabio Estevam wrote:
> > On Tue, Aug 25, 2020 at 11:40 AM Matthias Schiffer
> > wrote:
> >
> > > Makes sense. Does the following logic sound correct?
> > >
> > > - If num-cs is set, use that (and add
On Tue, 2020-08-25 at 14:16 -0300, Fabio Estevam wrote:
> On Tue, Aug 25, 2020 at 11:40 AM Matthias Schiffer
> wrote:
>
> > Makes sense. Does the following logic sound correct?
> >
> > - If num-cs is set, use that (and add it to the docs)
>
> I would not add num-cs to the docs. As far as I can
On Tue, Aug 25, 2020 at 11:40 AM Matthias Schiffer
wrote:
> Makes sense. Does the following logic sound correct?
>
> - If num-cs is set, use that (and add it to the docs)
I would not add num-cs to the docs. As far as I can see there is no
imx dts that uses num-cs currently.
> - If num-cs is uns
On Tue, 2020-08-25 at 11:24 -0300, Fabio Estevam wrote:
> Hi Matthias,
>
> On Tue, Aug 25, 2020 at 4:22 AM Matthias Schiffer
> wrote:
>
> > Hmm, unless I'm overlooking something, this is not going to work:
> >
> > - spi_get_gpio_descs() sets num_chipselect to the maximum of the
> > num_chipsele
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