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[24.155.109.49]) by smtp.gmail.com with ESMTPSA id 15sm11329506ooy.36.2020.10.13.05.36.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Oct 2020 05:36:26 -0700 (PDT) Received: (nullmailer pid 3304365 invoked by uid 1000); Tue, 13 Oct 2020 12:36:24 -0000 Date: Tue, 13 Oct 2020 07:36:24 -0500 From: Rob Herring To: Serge Semin Cc: Mathias Nyman , Felipe Balbi , Greg Kroah-Hartman , Serge Semin , Alexey Malahov , Pavel Parkhomenko , Andy Gross , Bjorn Andersson , Manu Gautam , Roger Quadros , Lad Prabhakar , Yoshihiro Shimoda , Neil Armstrong , Kevin Hilman , linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 10/18] dt-bindings: usb: Convert DWC USB3 bindings to DT schema Message-ID: <20201013123624.GC3269269@bogus> References: <20201010224121.12672-1-Sergey.Semin@baikalelectronics.ru> <20201010224121.12672-11-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201010224121.12672-11-Sergey.Semin@baikalelectronics.ru> Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org On Sun, Oct 11, 2020 at 01:41:13AM +0300, Serge Semin wrote: > DWC USB3 DT node is supposed to be compliant with the Generic xHCI > Controller schema, but with additional vendor-specific properties, the > controller-specific reference clocks and PHYs. So let's convert the > currently available legacy text-based DWC USB3 bindings to the DT schema > and make sure the DWC USB3 nodes are also validated against the > usb-xhci.yaml schema. > > Note we have to discard the nodename restriction of being prefixed with > "dwc3@" string, since in accordance with the usb-hcd.yaml schema USB nodes > are supposed to be named as "^usb(@.*)". > > Signed-off-by: Serge Semin > > --- > > Alas applying the usb-hcd.yaml schema on the DWC USB3 nodes will cause > dtbs_check failures since a lot of "snps,dwc3"-compatible DT nodes are > named with prefixes like "^dwc3@", "^usb[0-9]@" and even "^dwusb@", while > usb-hcd.yaml permits the "^usb@" prefix only. As I see it the better but > more painful solution would be to fix the corresponding DTS files (it's > some of the Qualcomm, HiSilicon, Exynos, Allwinner, Omap, Stih, APM and > Freescale DTS'es) so the DWC USB3 DT nodes would comply with the generic > USB HCD node naming schema. Alternatively we could either extend the > naming space in the usb-hcd.yaml or extract the generic properties to a > dedicated DT schema file. What do you think? IMO, we should fix the node names. > --- > .../devicetree/bindings/usb/dwc3.txt | 125 -------- > .../devicetree/bindings/usb/snps,dwc3.yaml | 295 ++++++++++++++++++ > 2 files changed, 295 insertions(+), 125 deletions(-) > delete mode 100644 Documentation/devicetree/bindings/usb/dwc3.txt > create mode 100644 Documentation/devicetree/bindings/usb/snps,dwc3.yaml > > diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt > deleted file mode 100644 > index d03edf9d3935..000000000000 > --- a/Documentation/devicetree/bindings/usb/dwc3.txt > +++ /dev/null > @@ -1,125 +0,0 @@ > -synopsys DWC3 CORE > - > -DWC3- USB3 CONTROLLER. Complies to the generic USB binding properties > - as described in 'usb/generic.txt' > - > -Required properties: > - - compatible: must be "snps,dwc3" > - - reg : Address and length of the register set for the device > - - interrupts: Interrupts used by the dwc3 controller. > - - clock-names: list of clock names. Ideally should be "ref", > - "bus_early", "suspend" but may be less or more. > - - clocks: list of phandle and clock specifier pairs corresponding to > - entries in the clock-names property. > - > -Exception for clocks: > - clocks are optional if the parent node (i.e. glue-layer) is compatible to > - one of the following: > - "cavium,octeon-7130-usb-uctl" > - "qcom,dwc3" > - "samsung,exynos5250-dwusb3" > - "samsung,exynos5433-dwusb3" > - "samsung,exynos7-dwusb3" > - "sprd,sc9860-dwc3" > - "st,stih407-dwc3" > - "ti,am437x-dwc3" > - "ti,dwc3" > - "ti,keystone-dwc3" > - "rockchip,rk3399-dwc3" > - "xlnx,zynqmp-dwc3" > - > -Optional properties: > - - usb-phy : array of phandle for the PHY device. The first element > - in the array is expected to be a handle to the USB2/HS PHY and > - the second element is expected to be a handle to the USB3/SS PHY > - - phys: from the *Generic PHY* bindings > - - phy-names: from the *Generic PHY* bindings; supported names are "usb2-phy" > - or "usb3-phy". > - - resets: set of phandle and reset specifier pairs > - - snps,usb2-lpm-disable: indicate if we don't want to enable USB2 HW LPM > - - snps,usb3_lpm_capable: determines if platform is USB3 LPM capable > - - snps,dis-start-transfer-quirk: when set, disable isoc START TRANSFER command > - failure SW work-around for DWC_usb31 version 1.70a-ea06 > - and prior. > - - snps,disable_scramble_quirk: true when SW should disable data scrambling. > - Only really useful for FPGA builds. > - - snps,has-lpm-erratum: true when DWC3 was configured with LPM Erratum enabled > - - snps,lpm-nyet-threshold: LPM NYET threshold > - - snps,u2exit_lfps_quirk: set if we want to enable u2exit lfps quirk > - - snps,u2ss_inp3_quirk: set if we enable P3 OK for U2/SS Inactive quirk > - - snps,req_p1p2p3_quirk: when set, the core will always request for > - P1/P2/P3 transition sequence. > - - snps,del_p1p2p3_quirk: when set core will delay P1/P2/P3 until a certain > - amount of 8B10B errors occur. > - - snps,del_phy_power_chg_quirk: when set core will delay PHY power change > - from P0 to P1/P2/P3. > - - snps,lfps_filter_quirk: when set core will filter LFPS reception. > - - snps,rx_detect_poll_quirk: when set core will disable a 400us delay to start > - Polling LFPS after RX.Detect. > - - snps,tx_de_emphasis_quirk: when set core will set Tx de-emphasis value. > - - snps,tx_de_emphasis: the value driven to the PHY is controlled by the > - LTSSM during USB3 Compliance mode. > - - snps,dis_u3_susphy_quirk: when set core will disable USB3 suspend phy. > - - snps,dis_u2_susphy_quirk: when set core will disable USB2 suspend phy. > - - snps,dis_enblslpm_quirk: when set clears the enblslpm in GUSB2PHYCFG, > - disabling the suspend signal to the PHY. > - - snps,dis-u1-entry-quirk: set if link entering into U1 needs to be disabled. > - - snps,dis-u2-entry-quirk: set if link entering into U2 needs to be disabled. > - - snps,dis_rxdet_inp3_quirk: when set core will disable receiver detection > - in PHY P3 power state. > - - snps,dis-u2-freeclk-exists-quirk: when set, clear the u2_freeclk_exists > - in GUSB2PHYCFG, specify that USB2 PHY doesn't provide > - a free-running PHY clock. > - - snps,dis-del-phy-power-chg-quirk: when set core will change PHY power > - from P0 to P1/P2/P3 without delay. > - - snps,dis-tx-ipgap-linecheck-quirk: when set, disable u2mac linestate check > - during HS transmit. > - - snps,parkmode-disable-ss-quirk: when set, all SuperSpeed bus instances in > - park mode are disabled. > - - snps,dis_metastability_quirk: when set, disable metastability workaround. > - CAUTION: use only if you are absolutely sure of it. > - - snps,is-utmi-l1-suspend: true when DWC3 asserts output signal > - utmi_l1_suspend_n, false when asserts utmi_sleep_n > - - snps,hird-threshold: HIRD threshold > - - snps,hsphy_interface: High-Speed PHY interface selection between "utmi" for > - UTMI+ and "ulpi" for ULPI when the DWC_USB3_HSPHY_INTERFACE has value 3. > - - snps,quirk-frame-length-adjustment: Value for GFLADJ_30MHZ field of GFLADJ > - register for post-silicon frame length adjustment when the > - fladj_30mhz_sdbnd signal is invalid or incorrect. > - - snps,rx-thr-num-pkt-prd: periodic ESS RX packet threshold count - host mode > - only. Set this and rx-max-burst-prd to a valid, > - non-zero value 1-16 (DWC_usb31 programming guide > - section 1.2.4) to enable periodic ESS RX threshold. > - - snps,rx-max-burst-prd: max periodic ESS RX burst size - host mode only. Set > - this and rx-thr-num-pkt-prd to a valid, non-zero value > - 1-16 (DWC_usb31 programming guide section 1.2.4) to > - enable periodic ESS RX threshold. > - - snps,tx-thr-num-pkt-prd: periodic ESS TX packet threshold count - host mode > - only. Set this and tx-max-burst-prd to a valid, > - non-zero value 1-16 (DWC_usb31 programming guide > - section 1.2.3) to enable periodic ESS TX threshold. > - - snps,tx-max-burst-prd: max periodic ESS TX burst size - host mode only. Set > - this and tx-thr-num-pkt-prd to a valid, non-zero value > - 1-16 (DWC_usb31 programming guide section 1.2.3) to > - enable periodic ESS TX threshold. > - > - - tx-fifo-resize: determines if the FIFO *has* to be reallocated. > - - snps,incr-burst-type-adjustment: Value for INCR burst type of GSBUSCFG0 > - register, undefined length INCR burst type enable and INCRx type. > - When just one value, which means INCRX burst mode enabled. When > - more than one value, which means undefined length INCR burst type > - enabled. The values can be 1, 4, 8, 16, 32, 64, 128 and 256. > - > - - in addition all properties from usb-xhci.txt from the current directory are > - supported as well > - > - > -This is usually a subnode to DWC3 glue to which it is connected. > - > -dwc3@4a030000 { > - compatible = "snps,dwc3"; > - reg = <0x4a030000 0xcfff>; > - interrupts = <0 92 4> > - usb-phy = <&usb2_phy>, <&usb3,phy>; > - snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>; > -}; > diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml > new file mode 100644 > index 000000000000..24808fc2c7e3 > --- /dev/null > +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml > @@ -0,0 +1,295 @@ > +# SPDX-License-Identifier: GPL-2.0 > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/usb/snps,dwc3.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Synopsys DesignWare USB3 Controller > + > +maintainers: > + - Felipe Balbi > + > +description: | > + This is usually a subnode to DWC3 glue to which it is connected, but can also > + be presented as a standalone DT node with an optional vendor-specific > + compatible string. > + > +allOf: > + - $ref: "usb-xhci.yaml#" > + > +properties: > + compatible: > + contains: > + const: "snps,dwc3" Don't need quotes > + > + interrupts: > + minItems: 1 > + maxItems: 3 > + > + clocks: > + description: | > + In general the core supports three types of clocks. bus_clk_early is a s/bus_clk_early/bus_early/ And the others too. > + SoC Bus Clock (AHB/AXI/Native). ref_clk generates ITP when the UTMI/ULPI > + PHY is suspended. suspend_clk clocks a small part of the USB3 core when > + SS PHY in P3. But particular cases may differ from that having less or > + more clock sources with another names. > + > + clock-names: > + contains: > + anyOf: > + - enum: ["bus_early", "ref", "suspend"] > + - true That's unfortunate... > + > + usb-phy: > + minItems: 1 > + items: > + - description: USB2/HS PHY > + - description: USB3/SS PHY > + > + phys: > + minItems: 1 > + items: > + - description: USB2/HS PHY > + - description: USB3/SS PHY > + > + phy-names: > + minItems: 1 > + items: > + - const: usb2-phy > + - const: usb3-phy > + > + resets: > + minItems: 1 > + > + snps,usb2-lpm-disable: > + description: Indicate if we don't want to enable USB2 HW LPM > + type: boolean > + > + snps,usb3_lpm_capable: > + description: Determines if platform is USB3 LPM capable > + type: boolean > + > + snps,dis-start-transfer-quirk: > + description: | Drop '|'. > + When set, disable isoc START TRANSFER command failure SW work-around > + for DWC_usb31 version 1.70a-ea06 and prior. > + type: boolean > + > + snps,disable_scramble_quirk: > + description: | > + True when SW should disable data scrambling. Only really useful for FPGA > + builds. > + type: boolean > + > + snps,has-lpm-erratum: > + description: True when DWC3 was configured with LPM Erratum enabled > + type: boolean > + > + snps,lpm-nyet-threshold: > + description: LPM NYET threshold > + $ref: /schemas/types.yaml#/definitions/uint8 > + > + snps,u2exit_lfps_quirk: > + description: Set if we want to enable u2exit lfps quirk > + type: boolean > + > + snps,u2ss_inp3_quirk: > + description: Set if we enable P3 OK for U2/SS Inactive quirk > + type: boolean > + > + snps,req_p1p2p3_quirk: > + description: | > + When set, the core will always request for P1/P2/P3 transition sequence. > + type: boolean > + > + snps,del_p1p2p3_quirk: > + description: | > + When set core will delay P1/P2/P3 until a certain amount of 8B10B errors > + occur. > + type: boolean > + > + snps,del_phy_power_chg_quirk: > + description: When set core will delay PHY power change from P0 to P1/P2/P3. > + type: boolean > + > + snps,lfps_filter_quirk: > + description: When set core will filter LFPS reception. > + type: boolean > + > + snps,rx_detect_poll_quirk: > + description: | > + when set core will disable a 400us delay to start Polling LFPS after > + RX.Detect. > + type: boolean > + > + snps,tx_de_emphasis_quirk: > + description: When set core will set Tx de-emphasis value > + type: boolean > + > + snps,tx_de_emphasis: > + description: | > + The value driven to the PHY is controlled by the LTSSM during USB3 > + Compliance mode. > + $ref: /schemas/types.yaml#/definitions/uint8 > + > + snps,dis_u3_susphy_quirk: > + description: When set core will disable USB3 suspend phy > + type: boolean > + > + snps,dis_u2_susphy_quirk: > + description: When set core will disable USB2 suspend phy > + type: boolean > + > + snps,dis_enblslpm_quirk: > + description: | > + When set clears the enblslpm in GUSB2PHYCFG, disabling the suspend signal > + to the PHY. > + type: boolean > + > + snps,dis-u1-entry-quirk: > + description: Set if link entering into U1 needs to be disabled > + type: boolean > + > + snps,dis-u2-entry-quirk: > + description: Set if link entering into U2 needs to be disabled > + type: boolean > + > + snps,dis_rxdet_inp3_quirk: > + description: | > + When set core will disable receiver detection in PHY P3 power state. > + type: boolean > + > + snps,dis-u2-freeclk-exists-quirk: > + description: | > + When set, clear the u2_freeclk_exists in GUSB2PHYCFG, specify that USB2 > + PHY doesn't provide a free-running PHY clock. > + type: boolean > + > + snps,dis-del-phy-power-chg-quirk: > + description: | > + When set core will change PHY power from P0 to P1/P2/P3 without delay. > + type: boolean > + > + snps,dis-tx-ipgap-linecheck-quirk: > + description: When set, disable u2mac linestate check during HS transmit > + type: boolean > + > + snps,parkmode-disable-ss-quirk: > + description: | > + When set, all SuperSpeed bus instances in park mode are disabled. > + type: boolean > + > + snps,dis_metastability_quirk: > + description: | > + When set, disable metastability workaround. CAUTION! Use only if you are > + absolutely sure of it. > + type: boolean > + > + snps,is-utmi-l1-suspend: > + description: | > + True when DWC3 asserts output signal utmi_l1_suspend_n, false when > + asserts utmi_sleep_n. > + type: boolean > + > + snps,hird-threshold: > + description: HIRD threshold > + $ref: /schemas/types.yaml#/definitions/uint8 > + > + snps,hsphy_interface: > + description: | > + High-Speed PHY interface selection between UTMI+ and ULPI when the > + DWC_USB3_HSPHY_INTERFACE has value 3. > + $ref: /schemas/types.yaml#/definitions/uint8 > + enum: ["utmi", "ulpi"] > + > + snps,quirk-frame-length-adjustment: > + description: | > + Value for GFLADJ_30MHZ field of GFLADJ register for post-silicon frame > + length adjustment when the fladj_30mhz_sdbnd signal is invalid or > + incorrect. > + $ref: /schemas/types.yaml#/definitions/uint32 > + > + snps,rx-thr-num-pkt-prd: > + description: | > + Periodic ESS RX packet threshold count (host mode only). Set this and > + snps,rx-max-burst-prd to a valid, non-zero value 1-16 (DWC_usb31 > + programming guide section 1.2.4) to enable periodic ESS RX threshold. > + $ref: /schemas/types.yaml#/definitions/uint8 > + minimum: 1 > + maximum: 16 > + > + snps,rx-max-burst-prd: > + description: | > + Max periodic ESS RX burst size (host mode only). Set this and > + snps,rx-thr-num-pkt-prd to a valid, non-zero value 1-16 (DWC_usb31 > + programming guide section 1.2.4) to enable periodic ESS RX threshold. > + $ref: /schemas/types.yaml#/definitions/uint8 > + minimum: 1 > + maximum: 16 > + > + snps,tx-thr-num-pkt-prd: > + description: | > + Periodic ESS TX packet threshold count (host mode only). Set this and > + snps,tx-max-burst-prd to a valid, non-zero value 1-16 (DWC_usb31 > + programming guide section 1.2.3) to enable periodic ESS TX threshold. > + $ref: /schemas/types.yaml#/definitions/uint8 > + minimum: 1 > + maximum: 16 > + > + snps,tx-max-burst-prd: > + description: | > + Max periodic ESS TX burst size (host mode only). Set this and > + snps,tx-thr-num-pkt-prd to a valid, non-zero value 1-16 (DWC_usb31 > + programming guide section 1.2.3) to enable periodic ESS TX threshold. > + $ref: /schemas/types.yaml#/definitions/uint8 > + minimum: 1 > + maximum: 16 > + > + tx-fifo-resize: > + description: Determines if the FIFO *has* to be reallocated > + deprecated: true > + type: boolean > + > + snps,incr-burst-type-adjustment: > + description: | > + Value for INCR burst type of GSBUSCFG0 register, undefined length INCR > + burst type enable and INCRx type. A single value means INCRX burst mode > + enabled. If more than one value specified, undefined length INCR burst > + type will be enabled with burst lengths utilized up to the maximum > + of the values passed in this property. > + $ref: /schemas/types.yaml#/definitions/uint32-array > + minItems: 1 > + maxItems: 8 > + uniqueItems: true > + items: > + enum: [1, 4, 8, 16, 32, 64, 128, 256] > + > +unevaluatedProperties: false > + > +required: > + - compatible > + - reg > + - interrupts > + > +examples: > + - | > + usb@4a030000 { > + compatible = "snps,dwc3"; > + reg = <0x4a030000 0xcfff>; > + interrupts = <0 92 4>; > + usb-phy = <&usb2_phy>, <&usb3_phy>; > + snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>; > + }; > + - | > + usb@4a000000 { > + compatible = "snps,dwc3"; > + reg = <0x4a000000 0xcfff>; > + interrupts = <0 92 4>; > + clocks = <&clk 1>, <&clk 2>, <&clk 3>; > + clock-names = "bus_early", "ref", "suspend"; > + phys = <&usb2_phy>, <&usb3_phy>; > + phy-names = "usb2-phy", "usb3-phy"; > + snps,dis_u2_susphy_quirk; > + snps,dis_enblslpm_quirk; > + }; > +... > -- > 2.27.0 >