linux-kernel - Re: [PATCH v2 04/12] arm64: dts: qcom: msm8994: Add support for SMD RPM

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Date:   Tue, 23 Jun 2020 16:15:41 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Konrad Dybcio <konradybcio@...il.com>
Cc:     skrzynka@...radybcio.pl, Andy Gross <agross@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 04/12] arm64: dts: qcom: msm8994: Add support for SMD
 RPM

On Tue 23 Jun 15:48 PDT 2020, Konrad Dybcio wrote:

> Add support for SMD RPM, including pm8994 and pmi8994
> regulators.
> 
> Signed-off-by: Konrad Dybcio <konradybcio@...il.com>
> ---
>  arch/arm64/boot/dts/qcom/msm8994.dtsi | 111 ++++++++++++++++++++++++++
>  1 file changed, 111 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8994.dtsi b/arch/arm64/boot/dts/qcom/msm8994.dtsi
> index e7f4b06eb12c..a4edc3be7024 100644
> --- a/arch/arm64/boot/dts/qcom/msm8994.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8994.dtsi
> @@ -159,9 +159,100 @@ smem_mem: smem_region@...0000 {
>  		};
>  	};
>  
> +	smd {
> +		compatible = "qcom,smd";
> +		rpm {
> +			interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
> +			qcom,ipc = <&apcs 8 0>;

Can you please extend qcom-apcs-ipc-mailbox and its binding to add
MSM8994 and use mboxes = <&apcs 0>; here instead?

I do see that while I added this support a few years ago I migrated some
of the remoteproc edges, but never any of the RPM ones. But it should
work...

> +			qcom,smd-edge = <15>;
> +			qcom,local-pid = <0>;
> +			qcom,remote-pid = <6>;
> +
> +			rpm-requests {
> +				compatible = "qcom,rpm-msm8994";
> +				qcom,smd-channels = "rpm_requests";
> +
> +				rpmcc: rpmcc {
> +					compatible = "qcom,rpmcc-msm8994";
> +					#clock-cells = <1>;
> +				};
> +
> +				pm8994_regulators: pm8994-regulators {

We've learned from experience that PMICs, naming of regulators and their
routing are board specific (or at least OEM specific).

So please give rpm-requests a label and add pm8994-regulators and
pmi8994-regulators to it in the board (your case platform) dts(i).

Regards,
Bjorn

> +					compatible = "qcom,rpm-pm8994-regulators";
> +					vdd_l1-supply = <&pm8994_s1>;
> +					vdd_l2_26_28-supply = <&pm8994_s3>;
> +					vdd_l3_11-supply = <&pm8994_s3>;
> +					vdd_l4_27_31-supply = <&pm8994_s3>;
> +					vdd_l5_7-supply = <&pm8994_s3>;
> +					vdd_l6_12_32-supply = <&pm8994_s5>;
> +					vdd_l8_16_30-supply = <&vreg_vph_pwr>;
> +					vdd_l9_10_18_22-supply = <&vreg_vph_pwr>;
> +					vdd_l13_19_23_24-supply = <&vreg_vph_pwr>;
> +					vdd_l14_15-supply = <&pm8994_s5>;
> +					vdd_l17_29-supply = <&vreg_vph_pwr>;
> +					vdd_l20_21-supply = <&vreg_vph_pwr>;
> +					vdd_l25-supply = <&pm8994_s5>;
> +					vdd_lvs1_2 = <&pm8994_s4>;
> +
> +					pm8994_s1: s1 {};
> +					pm8994_s2: s2 {};
> +					pm8994_s3: s3 {};
> +					pm8994_s4: s4 {};
> +					pm8994_s5: s5 {};
> +					pm8994_s6: s6 {};
> +					pm8994_s7: s7 {};
> +
> +					pm8994_l1: l1 {};
> +					pm8994_l2: l2 {};
> +					pm8994_l3: l3 {};
> +					pm8994_l4: l4 {};
> +					pm8994_l6: l6 {};
> +					pm8994_l8: l8 {};
> +					pm8994_l9: l9 {};
> +					pm8994_l10: l10 {};
> +					pm8994_l11: l11 {};
> +					pm8994_l12: l12 {};
> +					pm8994_l13: l13 {};
> +					pm8994_l14: l14 {};
> +					pm8994_l15: l15 {};
> +					pm8994_l16: l16 {};
> +					pm8994_l17: l17 {};
> +					pm8994_l18: l18 {};
> +					pm8994_l19: l19 {};
> +					pm8994_l20: l20 {};
> +					pm8994_l21: l21 {};
> +					pm8994_l22: l22 {};
> +					pm8994_l23: l23 {};
> +					pm8994_l24: l24 {};
> +					pm8994_l25: l25 {};
> +					pm8994_l26: l26 {};
> +					pm8994_l27: l27 {};
> +					pm8994_l28: l28 {};
> +					pm8994_l29: l29 {};
> +					pm8994_l30: l30 {};
> +					pm8994_l31: l31 {};
> +					pm8994_l32: l32 {};
> +
> +					pm8994_lvs1: lvs1 {};
> +					pm8994_lvs2: lvs2 {};
> +				};
> +
> +				pmi8994_regulators: pmi8994-regulators {
> +					compatible = "qcom,rpm-pmi8994-regulators";
> +
> +					pmi8994_s1: s1 {};
> +					pmi8994_s2: s2 {};
> +					pmi8994_s3: s3 {};
> +					pmi8994_bby: boost-bypass {};
> +				};
> +			};
> +		};
> +	};
> +
>  	smem {
>  		compatible = "qcom,smem";
>  		memory-region = <&smem_mem>;
> +		qcom,rpm-msg-ram = <&rpm_msg_ram>;
>  		hwlocks = <&tcsr_mutex 3>;
>  	};
>  
> @@ -180,6 +271,11 @@ intc: interrupt-controller@...00000 {
>  				  <0xf9002000 0x1000>;
>  		};
>  
> +		apcs: syscon@...0d000 {
> +			compatible = "syscon";
> +			reg = <0xf900d000 0x2000>;
> +		};
> +
>  		timer@...20000 {
>  			#address-cells = <1>;
>  			#size-cells = <1>;
> @@ -256,6 +352,11 @@ gcc: clock-controller@...00000 {
>  			reg = <0xfc400000 0x2000>;
>  		};
>  
> +		rpm_msg_ram: memory@...28000 {
> +			compatible = "qcom,rpm-msg-ram";
> +			reg = <0xfc428000 0x4000>;
> +		};
> +
>  		restart@...ab000 {
>  			compatible = "qcom,pshold";
>  			reg = <0xfc4ab000 0x4>;
> @@ -473,5 +574,15 @@ timer {
>  					<1 4 0xff08>,
>  					<1 1 0xff08>;
>  	};
> +
> +	vreg_vph_pwr: vreg-vph-pwr {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vph-pwr";
> +
> +		regulator-min-microvolt = <3600000>;
> +		regulator-max-microvolt = <3600000>;
> +
> +		regulator-always-on;
> +	};
>  };
>  
> -- 
> 2.27.0
>