Re: [PATCH] arm64: dts: qcom: sm6115: Move SDHC node(s)'s 'pinctrl' properties to dts

[Bhupesh Sharma]

Thanks Marjin for the review. Sorry for the delay in replying to your 
comments.

On 12/22/22 3:40 AM, Marijn Suijten wrote:
> On 2022-12-20 17:06:16, Bhupesh Sharma wrote:
> > Normally the 'pinctrl' properties of a SDHC controller and the
> > chip detect pin settings are dependent on the type of the slots
> > (for e.g uSD card slot), regulators and GPIO(s) available on the
> > board(s).
>
> I always thought it was okay to give the `sdcX_*` pins to the sdhc_X
> node unconditionally in SoC DTSI, and leave board-dependent card-detect
> (if this SDHCI slot is even used for removable cards) pins to the board
> DTS.
>
> > So, move the same from the sm6115 dtsi file to the respective
> > board file(s).
> >
> > Signed-off-by: Bhupesh Sharma <bhupesh.sharma@xxxxxxxxxx>
>
> Thanks for cleaning this up, we're already using this pattern in quite a
> few SoCs now.

Sure. But since they are being used in other SoC DTSIs doesn't guarantee 
the correct demarcation between SoC DTSI and Board DTS :)

> Reviewed-by: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx>
>
> Though...
>
> > ---
> >   .../boot/dts/qcom/sm4250-oneplus-billie2.dts  | 10 +++++++++
> >   arch/arm64/boot/dts/qcom/sm6115.dtsi          | 22 -------------------
> >   2 files changed, 10 insertions(+), 22 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sm4250-oneplus-billie2.dts b/arch/arm64/boot/dts/qcom/sm4250-oneplus-billie2.dts
> > index a3f1c7c41fd73..329eb496bbc5f 100644
> > --- a/arch/arm64/boot/dts/qcom/sm4250-oneplus-billie2.dts
> > +++ b/arch/arm64/boot/dts/qcom/sm4250-oneplus-billie2.dts
> > @@ -202,12 +202,22 @@ &sdhc_2 {
> >   	vqmmc-supply = <&vreg_l5a>;
> >   
> >   	cd-gpios = <&tlmm 88 GPIO_ACTIVE_HIGH>;
> > +	pinctrl-names = "default", "sleep";
> > +	pinctrl-0 = <&sdc2_state_on &sdc2_card_det_n>;
> > +	pinctrl-1 = <&sdc2_state_off &sdc2_card_det_n>;
> >   
> >   	status = "okay";
> >   };
> >   
> >   &tlmm {
> >   	gpio-reserved-ranges = <14 4>;
> > +
> > +	sdc2_card_det_n: sd-card-det-n-state {
> > +		pins = "gpio88";
> > +		function = "gpio";
> > +		drive-strength = <2>;
> > +		bias-pull-up;
>
> Note that SoC DTSI uses bias-disable in the off state.

The downstream uses bias-pull-up instead, as is the case with other 
upstream qcom dtsi (see [1] and [2]).

[1]. 
https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/qcom/qrb5165-rb5.dts#L1242

[2]. 
https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/qcom/sdm845-mtp.dts#L783

> > +	};
> >   };
> >   
> >   &ufs_mem_hc {
> > diff --git a/arch/arm64/boot/dts/qcom/sm6115.dtsi b/arch/arm64/boot/dts/qcom/sm6115.dtsi
> > index 572bf04adf906..6be763d39870d 100644
> > --- a/arch/arm64/boot/dts/qcom/sm6115.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sm6115.dtsi
> > @@ -518,13 +518,6 @@ data-pins {
> >   					bias-pull-up;
> >   					drive-strength = <10>;
> >   				};
> > -
> > -				sd-cd-pins {
> > -					pins = "gpio88";
> > -					function = "gpio";
> > -					bias-pull-up;
> > -					drive-strength = <2>;
> > -				};
> >   			};
> >   
> >   			sdc2_state_off: sdc2-off-state {
> > @@ -545,13 +538,6 @@ data-pins {
> >   					bias-pull-up;
> >   					drive-strength = <2>;
> >   				};
> > -
> > -				sd-cd-pins {
> > -					pins = "gpio88";
> > -					function = "gpio";
> > -					bias-disable;
> > -					drive-strength = <2>;
> > -				};
> >   			};
> >   		};
> >   
> > @@ -652,10 +638,6 @@ sdhc_1: mmc@4744000 {
> >   				 <&gcc GCC_SDCC1_ICE_CORE_CLK>;
> >   			clock-names = "iface", "core", "xo", "ice";
> >   
> > -			pinctrl-0 = <&sdc1_state_on>;
> > -			pinctrl-1 = <&sdc1_state_off>;
> > -			pinctrl-names = "default", "sleep";
> > -
>
> You can probably leave these and below?  Only boards needing to extend
> pinctrl with board-specific SDCard pins would have to update/override
> these properties that way?

I disagree on this. But let's defer to @Bjorn for further inputs on the 
same.

Thanks,
Bhupesh

> >   			bus-width = <8>;
> >   			status = "disabled";
> >   		};
> > @@ -672,10 +654,6 @@ sdhc_2: mmc@4784000 {
> >   			clocks = <&gcc GCC_SDCC2_AHB_CLK>, <&gcc GCC_SDCC2_APPS_CLK>, <&xo_board>;
> >   			clock-names = "iface", "core", "xo";
> >   
> > -			pinctrl-0 = <&sdc2_state_on>;
> > -			pinctrl-1 = <&sdc2_state_off>;
> > -			pinctrl-names = "default", "sleep";
> > -
> >   			power-domains = <&rpmpd SM6115_VDDCX>;
> >   			operating-points-v2 = <&sdhc2_opp_table>;
> >   			iommus = <&apps_smmu 0x00a0 0x0>;
> > --
> > 2.38.1