linux-kernel - Re: [PATCH v5 2/3] arm64: dts: qcom: sc7280: Add UFS nodes for sc7280 soc

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Date: Tue, 2 Apr 2024 09:36:41 +0530
From: Manivannan Sadhasivam <mani@...nel.org>
To: Luca Weiss <luca.weiss@...rphone.com>
Cc: Manivannan Sadhasivam <mani@...nel.org>,
	Nitin Rawat <quic_nitirawa@...cinc.com>,
	Andy Gross <agross@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Avri Altman <avri.altman@....com>,
	Bart Van Assche <bvanassche@....org>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	cros-qcom-dts-watchers@...omium.org,
	~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, linux-scsi@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/3] arm64: dts: qcom: sc7280: Add UFS nodes for
 sc7280 soc

On Fri, Mar 22, 2024 at 08:59:12AM +0100, Luca Weiss wrote:
> On Mon Dec 4, 2023 at 6:28 PM CET, Manivannan Sadhasivam wrote:
> > On Mon, Dec 04, 2023 at 01:21:42PM +0100, Luca Weiss wrote:
> > > On Mon Dec 4, 2023 at 1:15 PM CET, Nitin Rawat wrote:
> > > >
> > > >
> > > > On 12/4/2023 3:54 PM, Luca Weiss wrote:
> > > > > From: Nitin Rawat <quic_nitirawa@...cinc.com>
> > > > > 
> > > > > Add UFS host controller and PHY nodes for sc7280 soc.
> > > > > 
> > > > > Signed-off-by: Nitin Rawat <quic_nitirawa@...cinc.com>
> > > > > Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> > > > > Tested-by: Konrad Dybcio <konrad.dybcio@...aro.org> # QCM6490 FP5
> > > > > [luca: various cleanups and additions as written in the cover letter]
> > > > > Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
> > > > > ---
> > > > >   arch/arm64/boot/dts/qcom/sc7280.dtsi | 74 +++++++++++++++++++++++++++++++++++-
> > > > >   1 file changed, 73 insertions(+), 1 deletion(-)
> > > > > 
> > > > > diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> > > > > index 04bf85b0399a..8b08569f2191 100644
> > > > > --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> > > > > +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> > > > > @@ -15,6 +15,7 @@
> > > > >   #include <dt-bindings/dma/qcom-gpi.h>
> > > > >   #include <dt-bindings/firmware/qcom,scm.h>
> > > > >   #include <dt-bindings/gpio/gpio.h>
> > > > > +#include <dt-bindings/interconnect/qcom,icc.h>
> > > > >   #include <dt-bindings/interconnect/qcom,osm-l3.h>
> > > > >   #include <dt-bindings/interconnect/qcom,sc7280.h>
> > > > >   #include <dt-bindings/interrupt-controller/arm-gic.h>
> > > > > @@ -906,7 +907,7 @@ gcc: clock-controller@...000 {
> > > > >   			clocks = <&rpmhcc RPMH_CXO_CLK>,
> > > > >   				 <&rpmhcc RPMH_CXO_CLK_A>, <&sleep_clk>,
> > > > >   				 <0>, <&pcie1_phy>,
> > > > > -				 <0>, <0>, <0>,
> > > > > +				 <&ufs_mem_phy 0>, <&ufs_mem_phy 1>, <&ufs_mem_phy 2>,
> > > > >   				 <&usb_1_qmpphy QMP_USB43DP_USB3_PIPE_CLK>;
> > > > >   			clock-names = "bi_tcxo", "bi_tcxo_ao", "sleep_clk",
> > > > >   				      "pcie_0_pipe_clk", "pcie_1_pipe_clk",
> > > > > @@ -2238,6 +2239,77 @@ pcie1_phy: phy@...e000 {
> > > > >   			status = "disabled";
> > > > >   		};
> > > > >   
> > > > > +		ufs_mem_hc: ufs@...4000 {
> > > > > +			compatible = "qcom,sc7280-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 GCC_UFS_PHY_GDSC>;
> > > > > +			required-opps = <&rpmhpd_opp_nom>;
> > > > > +
> > > > > +			iommus = <&apps_smmu 0x80 0x0>;
> > > > > +			dma-coherent;
> > > > > +
> > > > > +			interconnects = <&aggre1_noc MASTER_UFS_MEM QCOM_ICC_TAG_ALWAYS
> > > > > +					 &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
> > > > > +					<&gem_noc MASTER_APPSS_PROC QCOM_ICC_TAG_ALWAYS
> > > > > +					 &cnoc2 SLAVE_UFS_MEM_CFG QCOM_ICC_TAG_ALWAYS>;
> > > > > +			interconnect-names = "ufs-ddr", "cpu-ufs";
> > > > > +
> > > > > +			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";
> > > > > +		};
> > > > > +
> > > > > +		ufs_mem_phy: phy@...7000 {
> > > > > +			compatible = "qcom,sc7280-qmp-ufs-phy";
> > > > > +			reg = <0x0 0x01d87000 0x0 0xe00>;
> > > > > +			clocks = <&rpmhcc RPMH_CXO_CLK>,
> > > > > +				 <&gcc GCC_UFS_PHY_PHY_AUX_CLK>,
> > > > > +				 <&gcc GCC_UFS_1_CLKREF_EN>;
> > > > > +			clock-names = "ref", "ref_aux", "qref";
> > > > > +
> > > > > +			power-domains = <&gcc GCC_UFS_PHY_GDSC>;
> > > 
> > > Hi Nitin,
> > > 
> > > >
> > > > GCC_UFS_PHY_GDSC is UFS controller GDSC. For sc7280 Phy we don't need this.
> > > 
> > > In the current dt-bindings the power-domains property is required.
> > > 
> > > Is there another power-domain for the PHY to use, or do we need to
> > > adjust the bindings to not require power-domains property for ufs phy on
> > > sc7280?
> > > 
> >
> > PHYs are backed by MX power domain. So you should use that.
> >
> > > Also, with "PHY" in the name, it's interesting that this is not for the
> > > phy ;)
> > > 
> >
> > Yes, confusing indeed. But the controllers (PCIe, UFS, USB etc...) are backed by
> > GDSCs and all the analog components (PHYs) belong to MX domain since it is kind
> > of always ON.
> >
> > I'll submit a series to fix this for the rest of the SoCs.
> 
> Hi Mani,
> 
> Did you get around to sending such series?
> 

Sorry not yet. I wanted to send this series after the cleanup of AUX_CLK, but
that got stalled due to different reasons.

Let me try to send this one asap.

- Mani

> This would also fix some binding warnings, e.g. on SM6350.
> 
>   arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dtb: phy@...7000: 'power-domains' is a required property
>           from schema $id: http://devicetree.org/schemas/phy/qcom,sc8280xp-qmp-ufs-phy.yaml#
> 
> Regards
> Luca
> 
> 
> >
> > - Mani
> >
> > > Regards
> > > Luca
> > > 
> > > >
> > > > > +
> > > > > +			resets = <&ufs_mem_hc 0>;
> > > > > +			reset-names = "ufsphy";
> > > > > +
> > > > > +			#clock-cells = <1>;
> > > > > +			#phy-cells = <0>;
> > > > > +
> > > > > +			status = "disabled";
> > > > > +		};
> > > > > +
> > > > >   		ipa: ipa@...0000 {
> > > > >   			compatible = "qcom,sc7280-ipa";
> > > > >   
> > > > > 
> > > 
> 

-- 
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