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Message-ID: <20240424193007.GA329896-robh@kernel.org> Date: Wed, 24 Apr 2024 14:30:07 -0500 From: Rob Herring <robh@...nel.org> To: "Peng Fan (OSS)" <peng.fan@....nxp.com> Cc: Linus Walleij <linus.walleij@...aro.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, Peng Fan <peng.fan@....com>, Sudeep Holla <sudeep.holla@....com>, Cristian Marussi <cristian.marussi@....com>, linux-gpio@...r.kernel.org, devicetree@...r.kernel.org, imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com> Subject: Re: [PATCH v2 1/2] dt-bindings: firmware: arm,scmi: Add properties for i.MX95 Pinctrl OEM extensions On Thu, Apr 18, 2024 at 10:53:17AM +0800, Peng Fan (OSS) wrote: > From: Peng Fan <peng.fan@....com> > > i.MX95 Pinctrl is managed by SCMI firmware using OEM extensions. This > patch is to add i.MX95 Pinctrl OEM extensions properties. > > Signed-off-by: Peng Fan <peng.fan@....com> > --- > .../devicetree/bindings/firmware/arm,scmi.yaml | 9 ++- > .../bindings/firmware/nxp,imx95-scmi-pinctrl.yaml | 66 ++++++++++++++++++++++ > 2 files changed, 72 insertions(+), 3 deletions(-) > > diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml > index e9d3f043c4ed..e530bfff141a 100644 > --- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml > +++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml > @@ -262,9 +262,12 @@ properties: > patternProperties: > '-pins$': > type: object > - allOf: > - - $ref: /schemas/pinctrl/pincfg-node.yaml# > - - $ref: /schemas/pinctrl/pinmux-node.yaml# > + anyOf: > + - $ref: /schemas/firmware/nxp,imx95-scmi-pinctrl.yaml > + - allOf: > + - $ref: /schemas/pinctrl/pincfg-node.yaml# > + - $ref: /schemas/pinctrl/pinmux-node.yaml# > + > unevaluatedProperties: false > > description: > diff --git a/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi-pinctrl.yaml b/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi-pinctrl.yaml > new file mode 100644 > index 000000000000..f6c18e9fafec > --- /dev/null > +++ b/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi-pinctrl.yaml > @@ -0,0 +1,66 @@ > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) > +# Copyright 2024 NXP > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/firmware/nxp,imx95-scmi-pinctrl.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: i.MX System Control and Management Interface (SCMI) Pinctrl Protocol > + > +maintainers: > + - Peng Fan <peng.fan@....com> > + > +patternProperties: > + '[a-f0-9]+$': > + type: object > + unevaluatedProperties: false > + > + properties: > + pins: > + $ref: /schemas/types.yaml#/definitions/string > + description: name of the pin > + items: > + enum: [ daptdi, daptmsswdio, daptclkswclk, daptdotraceswo, > + gpioio00, gpioio01, gpioio02, gpioio03, gpioio04, ioio? > + gpioio05, gpioio06, gpioio07, gpioio08, gpioio09, > + gpioio10, gpioio11, gpioio12, gpioio13, gpioio14, > + gpioio15, gpioio16, gpioio17, gpioio18, gpioio19, > + gpioio20, gpioio21, gpioio22, gpioio23, gpioio24, > + gpioio25, gpioio26, gpioio27, gpioio28, gpioio29, > + gpioio30, gpioio31, gpioio32, gpioio33, gpioio34, > + gpioio35, gpioio36, gpioio37, ccmclko1, ccmclko2, > + ccmclko3, ccmclko4, enet1mdc, enet1mdio, enet1td3, > + enet1td2, enet1td1, enet1td0, enet1txctl, enet1txc, > + enet1rxctl, enet1rxc, enet1rd0, enet1rd1, enet1rd2, > + enet1rd3, enet2mdc, enet2mdio, enet2td3, enet2td2, > + enet2td1, enet2td0, enet2txctl, enet2txc, enet2rxctl, > + enet2rxc, enet2rd0, enet2rd1, enet2rd2, enet2rd3, > + sd1clk, sd1cmd, sd1data0, sd1data1, sd1data2, sd1data3, > + sd1data4, sd1data5, sd1data6, sd1data7, sd1strobe, > + sd2vselect, sd3clk, sd3cmd, sd3data0, sd3data1, > + sd3data2, sd3data3, xspi1data0, xspi1data1, xspi1data2, > + xspi1data3, xspi1data4, xspi1data5, xspi1data6, > + xspi1data7, xspi1dqs, xspi1sclk, xspi1ss0b, xspi1ss1b, > + sd2cdb, sd2clk, sd2cmd, sd2data0, sd2data1, sd2data2, > + sd2data3, sd2resetb, i2c1scl, i2c1sda, i2c2scl, i2c2sda, > + uart1rxd, uart1txd, uart2rxd, uart2txd, pdmclk, > + pdmbitstream0, pdmbitstream1, sai1txfs, sai1txc, > + sai1txd0, sai1rxd0, wdogany, fccuerr0 ] > + > + nxp,func-id: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: Indicates the PAD connections which function module The description makes no sense... > + > + nxp,pin-conf: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: The PAD configuration PAD stands for? Or is it pin configuration as the property name says? This is just a raw register values? Why can't standard pinctrl properties be used here. What's the point of using SCMI pinctrl if you are just shuttling register values to SCMI? > + > + nxp,daisy-id: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: The select input register ID > + > + nxp,daisy-conf: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: The select input register value I remember some daisy chaining stuff in iomuxc, but otherwise What's the relationship between these 2 properties? Is it valid if only 1 is present? I doubt it. Looks like an address and value pair. Either the schema needs to define allowed combinations or design the properties in a way you don't have too. IOW, make a single property that's a tuple of register ID and value. Rob
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