Hi Geert,
On Wednesday 10 May 2017 10:57:04 Geert Uytterhoeven wrote:
> On Wed, May 10, 2017 at 9:04 AM, Laurent Pinchart wrote:
> > The DU1 and DU2 external dot clocks are fixed frequency clock generators
> > running at 33MHz.
> >
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
> > ---
> >
> > arch/arm64/boot/dts/renesas/salvator-x.dtsi | 23 +++++++++++++++++++++++
> > 1 file changed, 23 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/renesas/salvator-x.dtsi
> > b/arch/arm64/boot/dts/renesas/salvator-x.dtsi index
> > 2cd0cce818e7..884c63ebba69 100644
> > --- a/arch/arm64/boot/dts/renesas/salvator-x.dtsi
> > +++ b/arch/arm64/boot/dts/renesas/salvator-x.dtsi
> > @@ -212,6 +212,19 @@
> >
> > #clock-cells = <0>;
> > clock-frequency = <24576000>;
> >
> > };
> >
> > +
> > + /* External DU dot clocks */
> > + x21_clk: x21-clock {
> > + compatible = "fixed-clock";
> > + #clock-cells = <0>;
> > + clock-frequency = <33000000>;
> > + };
> > +
> > + x22_clk: x22-clock {
> > + compatible = "fixed-clock";
> > + #clock-cells = <0>;
> > + clock-frequency = <33000000>;
> > + };
> >
> > };
> >
> > &audio_clk_a {
> >
> > @@ -238,6 +251,16 @@
> >
> > pinctrl-names = "default";
> > status = "okay";
> >
> > + clocks = <&cpg CPG_MOD 724>,
> > + <&cpg CPG_MOD 723>,
> > + <&cpg CPG_MOD 722>,
> > + <&cpg CPG_MOD 721>,
> > + <&cpg CPG_MOD 727>,
> > + <&x21_clk>,
> > + <&x22_clk>;
> > + clock-names = "du.0", "du.1", "du.2", "du.3", "lvds.0",
> > + "dclkin.1", "dclkin.2";
>
> Another H3 vs. M3-W oddity: DU_DOTCLKIN2 is wired to pin AR7 on H3 SiP,
> and AR8 on M3-W SiP.
> But crystal X22 is wired to AR7, and AR8 is not connected.
> Hence on M3-W, "dclkin.2" is not available, cfr. "NC <M3SiP>" in the
> schematics.
Indeed :-/ X22 is populated though. No wonder the board is expensive :-)
> So either the du clocks and -names should be overridden in
> r8a7795-salvator.dtsi to add "dclkin.2", or in r8a7796-salvator.dtsi to
> remove it.
Or specified differently in both. I'll do that, it would be confusing
otherwise.
--
Regards,
Laurent Pinchart
