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Message-ID: <CAA8EJprqH5esxQkH3v-1i539OO3jQG9fN-YOqjZTwEqqgUfUyg@mail.gmail.com>
Date: Mon, 24 Apr 2023 14:17:06 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Varadarajan Narayanan <quic_varada@...cinc.com>
Cc: agross@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
vkoul@...nel.org, kishon@...nel.org, robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org, gregkh@...uxfoundation.org,
mturquette@...libre.com, sboyd@...nel.org, quic_wcheng@...cinc.com,
linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-usb@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH v8 7/8] arm64: dts: qcom: ipq9574: Add USB related nodes
On Mon, 24 Apr 2023 at 12:04, Varadarajan Narayanan
<quic_varada@...cinc.com> wrote:
>
> On Sat, Apr 22, 2023 at 12:07:01AM +0300, Dmitry Baryshkov wrote:
> > On 05/04/2023 14:41, Varadarajan Narayanan wrote:
> > >Add USB phy and controller related nodes
> > >
> > >Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>
> > >---
> > > Changes in v8:
> > > - Change clocks order to match the bindings
> > > Changes in v7:
> > > - Change com_aux -> cfg_ahb
> > > Changes in v6:
> > > - Introduce fixed regulators for the phy
> > > - Resolved all 'make dtbs_check' messages
> > >
> > > Changes in v5:
> > > - Fix additional comments
> > > - Edit nodes to match with qcom,sc8280xp-qmp-usb3-uni-phy.yaml
> > > - 'make dtbs_check' giving the following messages since
> > > ipq9574 doesn't have power domains. Hope this is ok
> > >
> > > /local/mnt/workspace/varada/varda-linux/arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dtb: phy@...00: 'power-domains' is a required property
> > > From schema: /local/mnt/workspace/varada/varda-linux/Documentation/devicetree/bindings/phy/qcom,sc8280xp-qmp-usb3-uni-phy.yaml
> > > /local/mnt/workspace/varada/varda-linux/arch/arm64/boot/dts/qcom/ipq9574-al02-c7.dtb: usb@...0000: 'power-domains' is a required property
> > > From schema: /local/mnt/workspace/varada/varda-linux/Documentation/devicetree/bindings/usb/qcom,dwc3.yaml
> > >
> > > Changes in v4:
> > > - Use newer bindings without subnodes
> > > - Fix coding style issues
> > >
> > > Changes in v3:
> > > - Insert the nodes at proper location
> > >
> > > Changes in v2:
> > > - Fixed issues flagged by Krzysztof
> > > - Fix issues reported by make dtbs_check
> > > - Remove NOC related clocks (to be added with proper
> > > interconnect support)
> > >---
> > > arch/arm64/boot/dts/qcom/ipq9574.dtsi | 120 ++++++++++++++++++++++++++++++++++
> > > 1 file changed, 120 insertions(+)
> > >
> > >diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> > >index 43a3dbe..1242382 100644
> > >--- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> > >+++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> > >@@ -150,6 +150,33 @@
> > > method = "smc";
> > > };
> > >+ reg_usb_3p3: s3300 {
> >
> > The node names do not look generic enough. Please take a look at other
> > platforms.
>
> Please see below.
>
> > >+ compatible = "regulator-fixed";
> > >+ regulator-min-microvolt = <3300000>;
> > >+ regulator-max-microvolt = <3300000>;
> > >+ regulator-boot-on;
> > >+ regulator-always-on;
> > >+ regulator-name = "usb-phy-vdd-dummy";
> >
> > This also doesn't look correct. This regulator should not just fill the gap.
> > Does it represent a generic voltage network on the board?
> >
> > Please do not add 'dummy' voltage regulators if there is no real voltage
> > wire.
>
> These are real voltage wires. I used dummy since they are
> always-on and cannot be increased/decreased (i.e. fixed).
> Would something along the following lines be appropriate?
Still not fully correct. Please use regulator name that corresponds to
the power grid on the board schematics. I don't think that you have a
separate power grids for USB PHY.
>
> vreg_ae10_3p3: s3300 {
Naming suggests that these voltages are generated by some PMIC. Is
this correct? If so, please describe the PMIC instead.
> compatible = "regulator-fixed";
> regulator-min-microvolt = <3300000>;
> regulator-max-microvolt = <3300000>;
> regulator-boot-on;
> regulator-always-on;
> regulator-name = "usb-phy-vdd";
> };
>
> vreg_ad8_1p8: s1800 {
> compatible = "regulator-fixed";
> regulator-min-microvolt = <1800000>;
> regulator-max-microvolt = <1800000>;
> regulator-boot-on;
> regulator-always-on;
> regulator-name = "usb-phy-pll";
> };
>
> vreg_ad9_0p925: s0925 {
> compatible = "regulator-fixed";
> regulator-min-microvolt = <925000>;
> regulator-max-microvolt = <925000>;
> regulator-boot-on;
> regulator-always-on;
> regulator-name = "usb-phy";
> };
>
> Thanks
> Varada
>
> > >+ };
> > >+
> > >+ reg_usb_1p8: s1800 {
> > >+ compatible = "regulator-fixed";
> > >+ regulator-min-microvolt = <1800000>;
> > >+ regulator-max-microvolt = <1800000>;
> > >+ regulator-boot-on;
> > >+ regulator-always-on;
> > >+ regulator-name = "usb-phy-pll-dummy";
> > >+ };
> > >+
> > >+ reg_usb_0p925: s0925 {
> > >+ compatible = "regulator-fixed";
> > >+ regulator-min-microvolt = <925000>;
> > >+ regulator-max-microvolt = <925000>;
> > >+ regulator-boot-on;
> > >+ regulator-always-on;
> > >+ regulator-name = "usb-phy-dummy";
> > >+ };
> > >+
> > > reserved-memory {
> > > #address-cells = <2>;
> > > #size-cells = <2>;
> > >@@ -179,6 +206,52 @@
> > > #size-cells = <1>;
> > > ranges = <0 0 0 0xffffffff>;
> > >+ usb_0_qusbphy: phy@...00 {
> > >+ compatible = "qcom,ipq9574-qusb2-phy";
> > >+ reg = <0x0007b000 0x180>;
> > >+ #phy-cells = <0>;
> > >+
> > >+ clocks = <&gcc GCC_USB0_PHY_CFG_AHB_CLK>,
> > >+ <&xo_board_clk>;
> > >+ clock-names = "cfg_ahb",
> > >+ "ref";
> > >+
> > >+ vdd-supply = <®_usb_0p925>;
> > >+ vdda-pll-supply = <®_usb_1p8>;
> > >+ vdda-phy-dpdm-supply = <®_usb_3p3>;
> > >+
> > >+ resets = <&gcc GCC_QUSB2_0_PHY_BCR>;
> > >+ status = "disabled";
> > >+ };
> > >+
> > >+ usb_0_qmpphy: phy@...00 {
> > >+ compatible = "qcom,ipq9574-qmp-usb3-phy";
> > >+ reg = <0x0007d000 0xa00>;
> > >+ #phy-cells = <0>;
> > >+
> > >+ clocks = <&gcc GCC_USB0_AUX_CLK>,
> > >+ <&xo_board_clk>,
> > >+ <&gcc GCC_USB0_PHY_CFG_AHB_CLK>,
> > >+ <&gcc GCC_USB0_PIPE_CLK>;
> > >+ clock-names = "aux",
> > >+ "ref",
> > >+ "cfg_ahb",
> > >+ "pipe";
> > >+
> > >+ resets = <&gcc GCC_USB0_PHY_BCR>,
> > >+ <&gcc GCC_USB3PHY_0_PHY_BCR>;
> > >+ reset-names = "phy",
> > >+ "phy_phy";
> > >+
> > >+ vdda-pll-supply = <®_usb_1p8>;
> > >+ vdda-phy-supply = <®_usb_0p925>;
> > >+
> > >+ status = "disabled";
> > >+
> > >+ #clock-cells = <0>;
> > >+ clock-output-names = "usb0_pipe_clk";
> > >+ };
> > >+
> > > pcie0_phy: phy@...00 {
> > > compatible = "qcom,ipq9574-qmp-gen3x1-pcie-phy";
> > > reg = <0x00084000 0x1000>;
> > >@@ -548,6 +621,53 @@
> > > status = "disabled";
> > > };
> > >+ usb3: usb@...0000 {
> > >+ compatible = "qcom,ipq9574-dwc3", "qcom,dwc3";
> > >+ reg = <0x08af8800 0x400>;
> > >+ #address-cells = <1>;
> > >+ #size-cells = <1>;
> > >+ ranges;
> > >+
> > >+ clocks = <&gcc GCC_SNOC_USB_CLK>,
> > >+ <&gcc GCC_USB0_MASTER_CLK>,
> > >+ <&gcc GCC_ANOC_USB_AXI_CLK>,
> > >+ <&gcc GCC_USB0_SLEEP_CLK>,
> > >+ <&gcc GCC_USB0_MOCK_UTMI_CLK>;
> > >+
> > >+ clock-names = "cfg_noc",
> > >+ "core",
> > >+ "iface",
> > >+ "sleep",
> > >+ "mock_utmi";
> > >+
> > >+ assigned-clocks = <&gcc GCC_USB0_MASTER_CLK>,
> > >+ <&gcc GCC_USB0_MOCK_UTMI_CLK>;
> > >+ assigned-clock-rates = <200000000>,
> > >+ <24000000>;
> > >+
> > >+ interrupts-extended = <&intc GIC_SPI 134 IRQ_TYPE_LEVEL_HIGH>;
> > >+ interrupt-names = "pwr_event";
> > >+
> > >+ resets = <&gcc GCC_USB_BCR>;
> > >+ status = "disabled";
> > >+
> > >+ dwc_0: usb@...0000 {
> > >+ compatible = "snps,dwc3";
> > >+ reg = <0x8a00000 0xcd00>;
> > >+ clocks = <&gcc GCC_USB0_MOCK_UTMI_CLK>;
> > >+ clock-names = "ref";
> > >+ interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
> > >+ phys = <&usb_0_qusbphy>, <&usb_0_qmpphy>;
> > >+ phy-names = "usb2-phy", "usb3-phy";
> > >+ tx-fifo-resize;
> > >+ snps,is-utmi-l1-suspend;
> > >+ snps,hird-threshold = /bits/ 8 <0x0>;
> > >+ snps,dis_u2_susphy_quirk;
> > >+ snps,dis_u3_susphy_quirk;
> > >+ dr_mode = "host";
> > >+ };
> > >+ };
> > >+
> > > intc: interrupt-controller@...0000 {
> > > compatible = "qcom,msm-qgic2";
> > > reg = <0x0b000000 0x1000>, /* GICD */
> >
> > --
> > With best wishes
> > Dmitry
> >
--
With best wishes
Dmitry
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