Re: [PATCH v3 4/5] arm64: dts: qcom: sa8775p: add UFS nodes

From: Manivannan Sadhasivam <mani@kernel.org>
To: Bartosz Golaszewski <brgl@bgdev.pl>
Cc: Andy Gross <agross@kernel.org>,
	Bjorn Andersson <andersson@kernel.org>,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	Vinod Koul <vkoul@kernel.org>,
	Kishon Vijay Abraham I <kishon@kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Manivannan Sadhasivam <mani@kernel.org>,
	Alim Akhtar <alim.akhtar@samsung.com>,
	Avri Altman <avri.altman@wdc.com>,
	Bart Van Assche <bvanassche@acm.org>,
	linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-scsi@vger.kernel.org,
	Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Subject: Re: [PATCH v3 4/5] arm64: dts: qcom: sa8775p: add UFS nodes
Date: Mon, 15 May 2023 09:55:51 +0530	[thread overview]
Message-ID: <20230515042551.GC5143@thinkpad> (raw)
In-Reply-To: <20230411130446.401440-5-brgl@bgdev.pl>

On Tue, Apr 11, 2023 at 03:04:45PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> 
> Add nodes for the UFS and its PHY on sa8775p platforms.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
> ---
>  arch/arm64/boot/dts/qcom/sa8775p.dtsi | 58 +++++++++++++++++++++++++++
>  1 file changed, 58 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> index 2343df7e0ea4..5de0fbbe9752 100644
> --- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
> @@ -585,6 +585,64 @@ &clk_virt SLAVE_QUP_CORE_1 QCOM_ICC_TAG_ALWAYS>,
>  			};
>  		};
>  
> +		ufs_mem_hc: ufs@1d84000 {
> +			compatible = "qcom,sa8775p-ufshc", "qcom,ufshc", "jedec,ufs-2.0";
> +			reg = <0x0 0x01d84000 0x0 0x3000>;
> +			interrupts = <GIC_SPI 265 IRQ_TYPE_LEVEL_HIGH>;
> +			phys = <&ufs_mem_phy>;
> +			phy-names = "ufsphy";
> +			lanes-per-direction = <2>;
> +			#reset-cells = <1>;
> +			resets = <&gcc GCC_UFS_PHY_BCR>;
> +			reset-names = "rst";
> +			power-domains = <&gcc UFS_PHY_GDSC>;
> +			required-opps = <&rpmhpd_opp_nom>;
> +			iommus = <&apps_smmu 0x100 0x0>;
> +			clocks = <&gcc GCC_UFS_PHY_AXI_CLK>,
> +				 <&gcc GCC_AGGRE_UFS_PHY_AXI_CLK>,
> +				 <&gcc GCC_UFS_PHY_AHB_CLK>,
> +				 <&gcc GCC_UFS_PHY_UNIPRO_CORE_CLK>,
> +				 <&rpmhcc RPMH_CXO_CLK>,
> +				 <&gcc GCC_UFS_PHY_TX_SYMBOL_0_CLK>,
> +				 <&gcc GCC_UFS_PHY_RX_SYMBOL_0_CLK>,
> +				 <&gcc GCC_UFS_PHY_RX_SYMBOL_1_CLK>;
> +			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";
> +			freq-table-hz = <75000000 300000000>,
> +					<0 0>,
> +					<0 0>,
> +					<75000000 300000000>,
> +					<0 0>,
> +					<0 0>,
> +					<0 0>,
> +					<0 0>;
> +			status = "disabled";

I'm pretty sure that the UFS controllers found in latest SoCs are cache
coherent. So you'd need "dma-coherent" property here.

- Mani

> +		};
> +
> +		ufs_mem_phy: phy@1d87000 {
> +			compatible = "qcom,sa8775p-qmp-ufs-phy";
> +			reg = <0x0 0x01d87000 0x0 0xe10>;
> +			/*
> +			 * Yes, GCC_EDP_REF_CLKREF_EN is correct in qref. It
> +			 * enables the CXO clock to eDP *and* UFS PHY.
> +			 */
> +			clocks = <&rpmhcc RPMH_CXO_CLK>,
> +				 <&gcc GCC_UFS_PHY_PHY_AUX_CLK>,
> +				 <&gcc GCC_EDP_REF_CLKREF_EN>;
> +			clock-names = "ref", "ref_aux", "qref";
> +			power-domains = <&gcc UFS_PHY_GDSC>;
> +			resets = <&ufs_mem_hc 0>;
> +			reset-names = "ufsphy";
> +			#phy-cells = <0>;
> +			status = "disabled";
> +		};
> +
>  		tcsr_mutex: hwlock@1f40000 {
>  			compatible = "qcom,tcsr-mutex";
>  			reg = <0x0 0x01f40000 0x0 0x20000>;
> -- 
> 2.37.2
> 

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