| Message ID | 20200317205017.28280-5-michael@walle.cc (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for Kontron sl28cpld | expand |
On Tue, Mar 17, 2020 at 09:50:03PM +0100, Michael Walle wrote: > This adds device tree bindings for the board management controller found > on the Kontron SMARC-sAL28 board. > > Signed-off-by: Michael Walle <michael@walle.cc> > --- > .../bindings/mfd/kontron,sl28cpld.yaml | 143 ++++++++++++++++++ > 1 file changed, 143 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml > > diff --git a/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml b/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml > new file mode 100644 > index 000000000000..3b9cca49d2d6 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml > @@ -0,0 +1,143 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/mfd/kontron,sl28cpld.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Kontron's sl28cpld board management controller > + > +maintainers: > + - Michael Walle <michael@walle.cc> > + > +description: | > + The board management controller may contain different IP blocks like > + watchdog, fan monitoring, PWM controller, interrupt controller and a > + GPIO controller. > + > +properties: > + compatible: > + const: kontron,sl28cpld > + > + reg: > + description: > + I2C device address. > + maxItems: 1 > + > + "#address-cells": > + const: 1 > + > + "#size-cells": > + const: 0 > + > + "#interrupt-cells": > + const: 2 > + > + interrupts: > + maxItems: 1 > + > + interrupt-controller: true > + > +patternProperties: > + "^gp(io|i|o)(@[0-9]+)?$": Just 'gpio'. We don't need that level of distinguishing in node names. > + $ref: ../gpio/kontron,sl28cpld-gpio.yaml > + > + "^hwmon(@[0-9]+)?$": > + $ref: ../hwmon/kontron,sl28cpld-hwmon.yaml > + > + "^pwm(@[0-9]+)?$": > + $ref: ../pwm/kontron,sl28cpld-pwm.yaml > + > + "^watchdog(@[0-9]+)?$": > + $ref: ../watchdog/kontron,sl28cpld-wdt.yaml The patches for these files need to come first or validating this file fails. Really, you can just make all five files 1 patch. > + > +required: > + - "#address-cells" > + - "#size-cells" > + - compatible > + - reg > + - "#interrupt-cells" > + - interrupt-controller > + > +oneOf: > + - required: > + - interrupts > + - required: > + - interrupts-extended Don't need to do this. Just make 'interrupts' required and you'll get interrupts-extended for free. > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/irq.h> > + i2c { > + #address-cells = <1>; > + #size-cells = <0>; > + > + sl28cpld@4a { > + #address-cells = <1>; > + #size-cells = <0>; > + compatible = "kontron,sl28cpld"; > + reg = <0x4a>; > + interrupts-extended = <&gpio2 6 IRQ_TYPE_EDGE_FALLING>; > + > + #interrupt-cells = <2>; > + interrupt-controller; > + > + gpio@0 { > + compatible = "kontron,sl28cpld-gpio"; > + reg = <0>; > + > + gpio-controller; > + #gpio-cells = <2>; > + > + interrupt-controller; > + #interrupt-cells = <2>; > + }; > + > + gpio@1 { > + compatible = "kontron,sl28cpld-gpio"; > + reg = <1>; > + > + gpio-controller; > + #gpio-cells = <2>; > + > + interrupt-controller; > + #interrupt-cells = <2>; > + }; > + > + gpo { > + compatible = "kontron,sl28cpld-gpo"; > + > + gpio-controller; > + #gpio-cells = <2>; > + gpio-line-names = "a", "b", "c"; > + }; > + > + gpi { > + compatible = "kontron,sl28cpld-gpi"; > + > + gpio-controller; > + #gpio-cells = <2>; > + }; > + > + hwmon { > + compatible = "kontron,sl28cpld-fan"; > + }; > + > + pwm@0 { You already used the '0' address. You can't have 2 things at the same address. There's only one number space at a given level. All these child devices don't have any DT resources, so you don't really need them. The parent node could be a gpio and pwm provider and that's all you need in DT. Aside from DT resources, the only other reason to have all these child nodes are if the child blocks are going to get assembled in different combinations across a variety of h/w. Rob
Am 2020-03-31 00:35, schrieb Rob Herring: > On Tue, Mar 17, 2020 at 09:50:03PM +0100, Michael Walle wrote: >> This adds device tree bindings for the board management controller >> found >> on the Kontron SMARC-sAL28 board. >> >> Signed-off-by: Michael Walle <michael@walle.cc> >> --- >> .../bindings/mfd/kontron,sl28cpld.yaml | 143 >> ++++++++++++++++++ >> 1 file changed, 143 insertions(+) >> create mode 100644 >> Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml >> >> diff --git >> a/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml >> b/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml >> new file mode 100644 >> index 000000000000..3b9cca49d2d6 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml >> @@ -0,0 +1,143 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/mfd/kontron,sl28cpld.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Kontron's sl28cpld board management controller >> + >> +maintainers: >> + - Michael Walle <michael@walle.cc> >> + >> +description: | >> + The board management controller may contain different IP blocks >> like >> + watchdog, fan monitoring, PWM controller, interrupt controller and >> a >> + GPIO controller. >> + >> +properties: >> + compatible: >> + const: kontron,sl28cpld >> + >> + reg: >> + description: >> + I2C device address. >> + maxItems: 1 >> + >> + "#address-cells": >> + const: 1 >> + >> + "#size-cells": >> + const: 0 >> + >> + "#interrupt-cells": >> + const: 2 >> + >> + interrupts: >> + maxItems: 1 >> + >> + interrupt-controller: true >> + >> +patternProperties: >> + "^gp(io|i|o)(@[0-9]+)?$": > > Just 'gpio'. We don't need that level of distinguishing in node names. > >> + $ref: ../gpio/kontron,sl28cpld-gpio.yaml >> + >> + "^hwmon(@[0-9]+)?$": >> + $ref: ../hwmon/kontron,sl28cpld-hwmon.yaml >> + >> + "^pwm(@[0-9]+)?$": >> + $ref: ../pwm/kontron,sl28cpld-pwm.yaml >> + >> + "^watchdog(@[0-9]+)?$": >> + $ref: ../watchdog/kontron,sl28cpld-wdt.yaml > > The patches for these files need to come first or validating this file > fails. Really, you can just make all five files 1 patch. > >> + >> +required: >> + - "#address-cells" >> + - "#size-cells" >> + - compatible >> + - reg >> + - "#interrupt-cells" >> + - interrupt-controller >> + >> +oneOf: >> + - required: >> + - interrupts >> + - required: >> + - interrupts-extended > > Don't need to do this. Just make 'interrupts' required and you'll get > interrupts-extended for free. > >> + >> +additionalProperties: false >> + >> +examples: >> + - | >> + #include <dt-bindings/interrupt-controller/irq.h> >> + i2c { >> + #address-cells = <1>; >> + #size-cells = <0>; >> + >> + sl28cpld@4a { >> + #address-cells = <1>; >> + #size-cells = <0>; >> + compatible = "kontron,sl28cpld"; >> + reg = <0x4a>; >> + interrupts-extended = <&gpio2 6 IRQ_TYPE_EDGE_FALLING>; >> + >> + #interrupt-cells = <2>; >> + interrupt-controller; >> + >> + gpio@0 { >> + compatible = "kontron,sl28cpld-gpio"; >> + reg = <0>; >> + >> + gpio-controller; >> + #gpio-cells = <2>; >> + >> + interrupt-controller; >> + #interrupt-cells = <2>; >> + }; >> + >> + gpio@1 { >> + compatible = "kontron,sl28cpld-gpio"; >> + reg = <1>; >> + >> + gpio-controller; >> + #gpio-cells = <2>; >> + >> + interrupt-controller; >> + #interrupt-cells = <2>; >> + }; >> + >> + gpo { >> + compatible = "kontron,sl28cpld-gpo"; >> + >> + gpio-controller; >> + #gpio-cells = <2>; >> + gpio-line-names = "a", "b", "c"; >> + }; >> + >> + gpi { >> + compatible = "kontron,sl28cpld-gpi"; >> + >> + gpio-controller; >> + #gpio-cells = <2>; >> + }; >> + >> + hwmon { >> + compatible = "kontron,sl28cpld-fan"; >> + }; >> + >> + pwm@0 { > > You already used the '0' address. You can't have 2 things at the > same address. There's only one number space at a given level. There was a reason for having duplicate unit-addresses. See here for my reasoning: https://lore.kernel.org/linux-devicetree/e55d59a68f497c8f2eb406d40ae878b9@walle.cc/ But I've already noticed that it shouldn't be done it this way. The DT check is already complaining. > All these child devices don't have any DT resources, so you don't > really > need them. The parent node could be a gpio and pwm provider and that's > all you need in DT. Aside from DT resources, the only other reason > to have all these child nodes are if the child blocks are going to get > assembled in different combinations across a variety of h/w. What do you mean by DT resources? There is a new patch series in preparation where for example the watchdog has a new property "kontron,assert-wdt-timeout-pin". Which IMHO should be go under the watchdog node. Besides from that, there are actually three interrupt controllers, ie. the two full featured gpio controllers and one interrupt controller. Do you think it makes sense to combine that into the parent node eg. merging different thinks like an interrupt controller and the gpio controllers into a single interrupt mapping in the parent node. See also: https://lore.kernel.org/linux-devicetree/0e3e8204ab992d75aa07fc36af7e4ab2@walle.cc/ Also please keep in mind, that these are only the current available building blocks of a sl28cpld. They are likely to be extended for other functionalities. So while it might be possible to merge the current nodes into the parent I don't know it that is possible for future blocks. -michael
diff --git a/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml b/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml new file mode 100644 index 000000000000..3b9cca49d2d6 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml @@ -0,0 +1,143 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/kontron,sl28cpld.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Kontron's sl28cpld board management controller + +maintainers: + - Michael Walle <michael@walle.cc> + +description: | + The board management controller may contain different IP blocks like + watchdog, fan monitoring, PWM controller, interrupt controller and a + GPIO controller. + +properties: + compatible: + const: kontron,sl28cpld + + reg: + description: + I2C device address. + maxItems: 1 + + "#address-cells": + const: 1 + + "#size-cells": + const: 0 + + "#interrupt-cells": + const: 2 + + interrupts: + maxItems: 1 + + interrupt-controller: true + +patternProperties: + "^gp(io|i|o)(@[0-9]+)?$": + $ref: ../gpio/kontron,sl28cpld-gpio.yaml + + "^hwmon(@[0-9]+)?$": + $ref: ../hwmon/kontron,sl28cpld-hwmon.yaml + + "^pwm(@[0-9]+)?$": + $ref: ../pwm/kontron,sl28cpld-pwm.yaml + + "^watchdog(@[0-9]+)?$": + $ref: ../watchdog/kontron,sl28cpld-wdt.yaml + +required: + - "#address-cells" + - "#size-cells" + - compatible + - reg + - "#interrupt-cells" + - interrupt-controller + +oneOf: + - required: + - interrupts + - required: + - interrupts-extended + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + i2c { + #address-cells = <1>; + #size-cells = <0>; + + sl28cpld@4a { + #address-cells = <1>; + #size-cells = <0>; + compatible = "kontron,sl28cpld"; + reg = <0x4a>; + interrupts-extended = <&gpio2 6 IRQ_TYPE_EDGE_FALLING>; + + #interrupt-cells = <2>; + interrupt-controller; + + gpio@0 { + compatible = "kontron,sl28cpld-gpio"; + reg = <0>; + + gpio-controller; + #gpio-cells = <2>; + + interrupt-controller; + #interrupt-cells = <2>; + }; + + gpio@1 { + compatible = "kontron,sl28cpld-gpio"; + reg = <1>; + + gpio-controller; + #gpio-cells = <2>; + + interrupt-controller; + #interrupt-cells = <2>; + }; + + gpo { + compatible = "kontron,sl28cpld-gpo"; + + gpio-controller; + #gpio-cells = <2>; + gpio-line-names = "a", "b", "c"; + }; + + gpi { + compatible = "kontron,sl28cpld-gpi"; + + gpio-controller; + #gpio-cells = <2>; + }; + + hwmon { + compatible = "kontron,sl28cpld-fan"; + }; + + pwm@0 { + compatible = "kontron,sl28cpld-pwm"; + reg = <0>; + #pwm-cells = <2>; + }; + + pwm@1 { + compatible = "kontron,sl28cpld-pwm"; + reg = <1>; + #pwm-cells = <2>; + }; + + watchdog { + compatible = "kontron,sl28cpld-wdt"; + }; + }; + };
This adds device tree bindings for the board management controller found on the Kontron SMARC-sAL28 board. Signed-off-by: Michael Walle <michael@walle.cc> --- .../bindings/mfd/kontron,sl28cpld.yaml | 143 ++++++++++++++++++ 1 file changed, 143 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/kontron,sl28cpld.yaml