On Thu, Jan 10, 2013 at 01:46:53PM -0600, Nishanth Menon wrote:
> On 14:35-20130110, Matt Porter wrote:
> > On Sun, Oct 28, 2012 at 05:01:29PM +0530, Sekhar Nori wrote:
> > > On 10/18/2012 6:56 PM, Matt Porter wrote:
> > > > Adds AM33XX SPI support for am335x-bone and am335x-evm.
> > > >
> > > > Signed-off-by: Matt Porter <mporter@xxxxxx>
> > > > ---
> > > > arch/arm/boot/dts/am335x-bone.dts | 17 +++++++++++++++
> > > > arch/arm/boot/dts/am335x-evm.dts | 9 ++++++++
> > > > arch/arm/boot/dts/am33xx.dtsi | 43 +++++++++++++++++++++++++++++++++++++
> > > > 3 files changed, 69 insertions(+)
> > > >
> > > > diff --git a/arch/arm/boot/dts/am335x-bone.dts b/arch/arm/boot/dts/am335x-bone.dts
> > > > index 5510979..23edfd8 100644
> > > > --- a/arch/arm/boot/dts/am335x-bone.dts
> > > > +++ b/arch/arm/boot/dts/am335x-bone.dts
> > > > @@ -18,6 +18,17 @@
> > > > reg = <0x80000000 0x10000000>; /* 256 MB */
> > > > };
> > > >
> > > > + am3358_pinmux: pinmux@44e10800 {
> > > > + spi1_pins: pinmux_spi1_pins {
> > > > + pinctrl-single,pins = <
> > > > + 0x190 0x13 /* mcasp0_aclkx.spi1_sclk, OUTPUT_PULLUP | MODE3 */
> > > > + 0x194 0x33 /* mcasp0_fsx.spi1_d0, INPUT_PULLUP | MODE3 */
> > > > + 0x198 0x13 /* mcasp0_axr0.spi1_d1, OUTPUT_PULLUP | MODE3 */
> minor comment:
> doing as a 0x33 is better for both d1, d0 as D0,D1 can be switched between SDI and SDO
> as needed with ti,pindir-d0-out-d1-in
Yes, thanks. Forgot about the new property and feature even though I
told somebody about it yesterday. :)
> > > > + 0x19c 0x13 /* mcasp0_ahclkr.spi1_cs0, OUTPUT_PULLUP | MODE3 */
> > > > + >;
> > >
> > > Is there a single pinmux setting that provides SPI functionality on the
> > > bone headers? Or this is specific to a cape you tested with?
> >
> > No, there are two usable settings for spi1 and one setting for spi0.
> > I'm dropping this from the series since it's specific to how I wired up
> > the homebrew cape I use for spi testing on the Bone. I publish the
> > branch where all these extra "test-specific" patches (that aren't intended
> > to be merged) are at in the cover letter. Anybody that needs context of
> > how/what worked and was tested can grab them there.
> Possibly dumb question:
> Cant we have pre-usable spi configurations? Like spi1_configuration1_pins,
> spi2_configuration1_pins, spi0_configuration1_pins? If documented with
> P9 pin names in the bone dts, it saves a bit of effort in looking up
> pad offset when dealing with capes.
Yes, let's introduce these things separately. I plan to reintroduce
patches to fix the incorrect 1-based numbering on many of the AM33xx as
previous ones were dropped...and I think this makes sense on top of
that.
-Matt
> --
> Regards,
> Nishanth Menon
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