On Thu, Apr 26, 2018 at 09:26:09AM +0200, jacopo mondi wrote:
> Hi Simon,
>
> On Thu, Apr 26, 2018 at 08:11:30AM +0200, Simon Horman wrote:
> > Thanks Jacopo,
> >
> > I'm very pleased to see this series.
>
> Credits to Geert that pointed out to me R-Mobile A1 comes with a CEU.
> I should mention him in next iteration actually, sorry about that.
>
> >
> > On Wed, Apr 25, 2018 at 01:15:20PM +0200, Jacopo Mondi wrote:
> > > Enable CEU0 peripheral for Renesas R-Mobile A1 R8A7740.
> >
> > Given 'status = "disabled"' below I think you
> > are describing but not enabling CEU0. Also in the subject.
>
> Right.
>
> >
> > Should we also describe CEU1?
>
> Armadillo board file only describe CEU0. If there are R-Mobile A1
> board files where I can steal informations from I can do that. If
> there's a public datasheet, that would be even better.
I have the datasheet, so perhaps I can add CEU1 after you have added CEU0.
> > > Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
> > > ---
> > > arch/arm/boot/dts/r8a7740.dtsi | 10 ++++++++++
> > > 1 file changed, 10 insertions(+)
> > >
> > > diff --git a/arch/arm/boot/dts/r8a7740.dtsi b/arch/arm/boot/dts/r8a7740.dtsi
> > > index afd3bc5..05ec41e 100644
> > > --- a/arch/arm/boot/dts/r8a7740.dtsi
> > > +++ b/arch/arm/boot/dts/r8a7740.dtsi
> > > @@ -67,6 +67,16 @@
> > > power-domains = <&pd_d4>;
> > > };
> > >
> > > + ceu0: ceu@fe910000 {
> > > + reg = <0xfe910000 0x100>;
> >
> > Should the size of the range be 0x3000 ?
> > That would seem to match my reading of table 32.3
> > and also be consistent with r7s72100.dtsi.
>
> I got this from
>
> static struct resource ceu0_resources[] = {
> [0] = {
> .name = "CEU",
> .start = 0xfe910000,
> .end = 0xfe91009f,
> .flags = IORESOURCE_MEM,
> },
> but I also noticed the r7s72100 one was bigger.
> I'm fine enlarging this, if that's what the manual reports too.
I think that would be best.
> > > + compatible = "renesas,r8a7740-ceu";
> > > + interrupts = <GIC_SPI 160 IRQ_TYPE_LEVEL_HIGH>;
> > > + clocks = <&mstp1_clks R8A7740_CLK_CEU20>;
> > > + clock-names = "ceu20";
> > > + power-domains = <&pd_a4mp>;
> >
> > My reading of table 1.7 is that the power domain should be A4R (&pd_a4r).
>
> Ah yes, my bad.
>
> The long time goal would be describe the camera module (mt9t112) which
> is installed on armadillo. Unfortunately that would probably require
> some more work on the CEU side.
Thanks, understood.
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