linux-kernel - Re: [RFC PATCH v2 2/4] arm64: dts: qcom: msm8998: Add UFS nodes

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Date:   Wed, 16 Jan 2019 08:36:04 -0700
From:   Jeffrey Hugo <jhugo@...eaurora.org>
To:     Marc Gonzalez <marc.w.gonzalez@...e.fr>,
        MSM <linux-arm-msm@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <andy.gross@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: Re: [RFC PATCH v2 2/4] arm64: dts: qcom: msm8998: Add UFS nodes

On 1/16/2019 3:56 AM, Marc Gonzalez wrote:
> Add host controller and PHY DT nodes.
> 
> Signed-off-by: Marc Gonzalez <marc.w.gonzalez@...e.fr>
> ---
> TODO: check whether the driver uses the 'resets' prop
> ---
>   arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi | 20 +++++++
>   arch/arm64/boot/dts/qcom/msm8998.dtsi     | 63 +++++++++++++++++++++++
>   2 files changed, 83 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi b/arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi
> index 50e9033aa7f6..cd1c9e84eab7 100644
> --- a/arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8998-mtp.dtsi
> @@ -257,3 +257,23 @@
>   	pinctrl-0 = <&sdc2_clk_on  &sdc2_cmd_on  &sdc2_data_on  &sdc2_cd_on>;
>   	pinctrl-1 = <&sdc2_clk_off &sdc2_cmd_off &sdc2_data_off &sdc2_cd_off>;
>   };
> +
> +&ufshc {
> +	vdd-hba-fixed-regulator;

Since we are not specifying the vdd anymore, I suspect this should be 
dropped.  Do you know of any reason why we'd still need it?

> +	vcc-supply = <&vreg_l20a_2p95>;
> +	vccq-supply = <&vreg_l26a_1p2>;
> +	vccq2-supply = <&vreg_s4a_1p8>;
> +	vcc-max-microamp = <750000>;
> +	vccq-max-microamp = <560000>;
> +	vccq2-max-microamp = <750000>;
> +};
> +
> +&ufsphy {
> +	vdda-phy-supply = <&vreg_l1a_0p875>;
> +	vdda-pll-supply = <&vreg_l2a_1p2>;
> +	vddp-ref-clk-supply = <&vreg_l26a_1p2>;
> +	vdda-phy-max-microamp = <51400>;
> +	vdda-pll-max-microamp = <14600>;
> +	vddp-ref-clk-max-microamp = <100>;
> +	vddp-ref-clk-always-on;
> +};
> diff --git a/arch/arm64/boot/dts/qcom/msm8998.dtsi b/arch/arm64/boot/dts/qcom/msm8998.dtsi
> index 6f4f4b79853b..36fd2e614464 100644
> --- a/arch/arm64/boot/dts/qcom/msm8998.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8998.dtsi
> @@ -711,6 +711,69 @@
>   			redistributor-stride = <0x0 0x20000>;
>   			interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
>   		};
> +
> +		ufshc: ufshc@...4000 {
> +			compatible = "qcom,msm8998-ufshc", "qcom,ufshc",
> +				     "jedec,ufs-2.0";
> +			reg = <0x1da4000 0x2500>;

Bjorn would like it if reg addresses are full width, ie 0x01da4000

> +			interrupts = <GIC_SPI 265 IRQ_TYPE_LEVEL_HIGH>;
> +			phys = <&ufsphy_lanes>;
> +			phy-names = "ufsphy";
> +			lanes-per-direction = <2>;
> +			power-domains = <&gcc UFS_GDSC>;
> +
> +			clock-names =
> +				"core_clk",
> +				"bus_aggr_clk",
> +				"iface_clk",
> +				"core_clk_unipro",
> +				"ref_clk",
> +				"tx_lane0_sync_clk",
> +				"rx_lane0_sync_clk",
> +				"rx_lane1_sync_clk";
> +			clocks =
> +				<&gcc GCC_UFS_AXI_CLK>,
> +				<&gcc GCC_AGGRE1_UFS_AXI_CLK>,
> +				<&gcc GCC_UFS_AHB_CLK>,
> +				<&gcc GCC_UFS_UNIPRO_CORE_CLK>,
> +				<&rpmcc RPM_SMD_LN_BB_CLK1>,
> +				<&gcc GCC_UFS_TX_SYMBOL_0_CLK>,
> +				<&gcc GCC_UFS_RX_SYMBOL_0_CLK>,
> +				<&gcc GCC_UFS_RX_SYMBOL_1_CLK>;
> +			freq-table-hz =
> +				<50000000 200000000>,
> +				<0 0>,
> +				<0 0>,
> +				<37500000 150000000>,
> +				<0 0>,
> +				<0 0>,
> +				<0 0>,
> +				<0 0>;
> +
> +			resets = <&gcc GCC_UFS_BCR>;
> +			reset-names = "rst";
> +		};
> +
> +		ufsphy: phy@...7000 {
> +			compatible = "qcom,sdm845-qmp-ufs-phy";

We should make an 8998 compatible.  Also, don't you have phy changes 
since the init sequence differs between 845 and 8998?

> +			reg = <0x1da7000 0x18c>;

0x01da7000, see above comment

> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			ranges;
> +			clock-names = "ref", "ref_aux";
> +			clocks =
> +				<&gcc GCC_UFS_CLKREF_CLK>,
> +				<&gcc GCC_UFS_PHY_AUX_CLK>;
> +
> +			ufsphy_lanes: lanes@...7400 {
> +				reg = <0x1da7400 0x128>,
> +				      <0x1da7600 0x1fc>,
> +				      <0x1da7c00 0x1dc>,
> +				      <0x1da7800 0x128>,
> +				      <0x1da7a00 0x1fc>;
> +				#phy-cells = <0>;
> +			};
> +		};
>   	};
>   };
>   
> 


-- 
Jeffrey Hugo
Qualcomm Datacenter Technologies as an affiliate of Qualcomm 
Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.