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SubjectRe: [PATCH 4/4] arm64: dts: qcom: msm8916: add bindings for i2c1, i2c3, i2c5
Hi Bjorn,


On Thu, Nov 09, 2017 at 09:00:16AM -0800, Bjorn Andersson wrote:
> On Wed 01 Nov 10:53 PDT 2017, Damien Riegel wrote:
>
> I think it's better to use the word "nodes" (add nodes...)

Will reword that.

>
> > Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
> > ---
> > arch/arm64/boot/dts/qcom/msm8916-pins.dtsi | 72 ++++++++++++++++++++++++++++++
> > arch/arm64/boot/dts/qcom/msm8916.dtsi | 45 +++++++++++++++++++
> > 2 files changed, 117 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi b/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
> > index c67ad8ed8b60..1cec5b30ed6e 100644
> > --- a/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/msm8916-pins.dtsi
> > @@ -270,6 +270,30 @@
> > };
> > };
> >
> > + i2c1_default: i2c1_default {
> > + pinmux {
> > + function = "blsp_i2c1";
> > + pins = "gpio2", "gpio3";
> > + };
> > + pinconf {
> > + pins = "gpio2", "gpio3";
> > + drive-strength = <16>;
> > + bias-disable;
> > + };
>
> pinconf is typically board specific, so please leave these out from the
> base dtsi.

I don't mind dropping that, but pinconf for i2c{2,4,6} is already in
msm8916-pins.dtsi, so we should either drop them all, or add pinconf for
i2c{1,3,5} for consistency. And if I read the pinctrl driver correctly,
I2C cannot be routed to other pins, the only properties that users may
want to modify are drive-strength and bias. Let me know which option you
prefer.


> > diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> > index de25bd6070f5..bdc4cb6f66d4 100644
> > --- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> > @@ -455,6 +455,21 @@
> > status = "disabled";
> > };
> >
> > + blsp_i2c1: i2c@78b5000 {
> > + compatible = "qcom,i2c-qup-v2.2.1";
> > + reg = <0x078b5000 0x600>;
>
> Size is 0x500.

Will update that (and will also do that for patch 3)

> > + interrupts = <GIC_SPI 95 0>;
> > + clocks = <&gcc GCC_BLSP1_AHB_CLK>,
> > + <&gcc GCC_BLSP1_QUP1_I2C_APPS_CLK>;
> > + clock-names = "iface", "core";
> > + pinctrl-names = "default", "sleep";
> > + pinctrl-0 = <&i2c1_default>;
> > + pinctrl-1 = <&i2c1_sleep>;
>
> Please omit the pinctrl-* properties from the base dtsi (when it's not
> hard coded things for the platform).
>
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + status = "disabled";
> > + };
> > +
> > blsp_i2c2: i2c@78b6000 {
> > compatible = "qcom,i2c-qup-v2.2.1";
> > reg = <0x078b6000 0x600>;
>
> Otherwise this looks good!

Thank you for the review,
--
Damien

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