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Date: Thu, 28 May 2020 19:51:37 +0800
From: Hanks Chen <hanks.chen@...iatek.com>
To: Rob Herring <robh+dt@...nel.org>
CC: Linus Walleij <linus.walleij@...aro.org>,
Mark Rutland <mark.rutland@....com>,
Matthias Brugger <matthias.bgg@...il.com>,
"Sean Wang" <sean.wang@...nel.org>,
Andy Teng <andy.teng@...iatek.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@...ts.infradead.org>, <devicetree@...r.kernel.org>,
wsd_upstream <wsd_upstream@...iatek.com>
Subject: Re: [PATCH v5 1/6] dt-bindings: pinctrl: add bindings for MediaTek
MT6779 SoC
On Thu, 2020-03-26 at 11:43 -0600, Rob Herring wrote:
> On Wed, Mar 25, 2020 at 3:31 AM Hanks Chen <hanks.chen@...iatek.com> wrote:
> >
> > From: Andy Teng <andy.teng@...iatek.com>
> >
> > Add devicetree bindings for MediaTek MT6779 pinctrl driver.
> >
> > Signed-off-by: Andy Teng <andy.teng@...iatek.com>
> > ---
> > .../bindings/pinctrl/mediatek,mt6779-pinctrl.yaml | 208 ++++++++++++++++++++
> > 1 file changed, 208 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml
>
> The header belongs in this patch so that 'make dt_binding_check' works.
>
> >
> > diff --git a/Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml
> > new file mode 100644
> > index 0000000..5f9bbf1
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml
> > @@ -0,0 +1,208 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/pinctrl/mediatek,mt6779-pinctrl.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Mediatek MT6779 Pin Controller Device Tree Bindings
> > +
> > +maintainers:
> > + - Andy Teng <andy.teng@...iatek.com>
> > +
> > +description: |+
> > + The pin controller node should be the child of a syscon node with the
> > + required property:
> > + - compatible: "syscon"
> > +
> > +properties:
> > + compatible:
> > + const: mediatek,mt6779-pinctrl
> > +
> > + reg:
> > + minItems: 9
> > + maxItems: 9
> > + description: |
> > + physical address base for gpio-related control registers.
> > +
> > + reg-names:
> > + description: |
> > + GPIO base register names.
>
> Need to define what the names are and the order.
Got it, I'll add it in next version.
Thanks
>
> > +
> > + gpio-controller: true
> > +
> > + "#gpio-cells":
> > + const: 2
> > + description: |
> > + Number of cells in GPIO specifier. Since the generic GPIO
> > + binding is used, the amount of cells must be specified as 2. See the below
> > + mentioned gpio binding representation for description of particular cells.
> > +
> > + gpio-ranges:
> > + minItems: 1
> > + maxItems: 5
> > + description: |
> > + GPIO valid number range.
> > +
> > + interrupt-controller: true
> > +
> > + interrupts:
> > + minItems: 1
> > + maxItems: 4
>
> Need to define what the interrupts are.
>
Got it, I'll add it in the next version.
Thanks.
> > + description: |
> > + The interrupt outputs to sysirq.
> > +
> > + "#interrupt-cells":
> > + const: 2
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - reg-names
> > + - gpio-controller
> > + - "#gpio-cells"
> > + - gpio-ranges
> > + - interrupt-controller
> > + - interrupts
> > + - "#interrupt-cells"
> > +
> > +patternProperties:
> > + '^pins*$':
>
> '-pins$' would be preferred.
>
Got it, I'll fix it in next version.
Thanks.
> > + type: object
> > + description: |
> > + A pinctrl node should contain at least one subnodes representing the
> > + pinctrl groups available on the machine. Each subnode will list the
> > + pins it needs, and how they should be configured, with regard to muxer
> > + configuration, pullups, drive strength, input enable/disable and input schmitt.
> > +
> > + properties:
> > + pinmux:
>
> There's a common schema for all these properties. You need to
> reference it (with $ref) and only define which properties you are
> using and any additional constraints.
>
Got it, thx!
> > + description:
> > + integer array, represents gpio pin number and mux setting.
> > + Supported pin number and mux varies for different SoCs, and are defined
> > + as macros in boot/dts/<soc>-pinfunc.h directly.
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32-array
> > + bias-disable:
> > + type: boolean
> > +
> > + bias-pull-up:
> > + oneOf:
> > + - type: boolean
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > +
> > + bias-pull-down:
> > + oneOf:
> > + - type: boolean
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > +
> > + input-enable:
> > + type: boolean
> > +
> > + input-disable:
> > + type: boolean
> > +
> > + output-low:
> > + type: boolean
> > +
> > + output-high:
> > + type: boolean
> > +
> > + input-schmitt-enable:
> > + type: boolean
> > +
> > + input-schmitt-disable:
> > + type: boolean
> > +
> > + mediatek,pull-up-adv:
> > + description: |
> > + Pull up setings for 2 pull resistors, R0 and R1. User can
> > + configure those special pins. Valid arguments are described as below:
> > + 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disable.
> > + 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
> > + 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
> > + 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - enum: [0, 1, 2, 3]
> > +
> > + mediatek,pull-down-adv:
> > + description: |
> > + Pull down settings for 2 pull resistors, R0 and R1. User can
> > + configure those special pins. Valid arguments are described as below:
> > + 0: (R1, R0) = (0, 0) which means R1 disabled and R0 disable.
> > + 1: (R1, R0) = (0, 1) which means R1 disabled and R0 enabled.
> > + 2: (R1, R0) = (1, 0) which means R1 enabled and R0 disabled.
> > + 3: (R1, R0) = (1, 1) which means R1 enabled and R0 enabled.
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - enum: [0, 1, 2, 3]
> > +
> > + drive-strength:
> > + description: |
> > + Selects the drive strength for the specified pins in mA.
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - enum: [2, 4, 6, 8, 10, 12, 14, 16]
> > +
> > + required:
> > + - pinmux
>
> Add:
>
> additionalProperties: false
>
> additionalProperties: false
>
Got it, I'll add it, thx!
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/interrupt-controller/irq.h>
> > + #include <dt-bindings/interrupt-controller/arm-gic.h>
> > + #include <dt-bindings/pinctrl/mt6779-pinfunc.h>
> > +
> > + pio: pinctrl@...05000 {
> > + compatible = "mediatek,mt6779-pinctrl";
> > + reg = <0 0x10005000 0 0x1000>,
> > + <0 0x11c20000 0 0x1000>,
> > + <0 0x11d10000 0 0x1000>,
> > + <0 0x11e20000 0 0x1000>,
> > + <0 0x11e70000 0 0x1000>,
> > + <0 0x11ea0000 0 0x1000>,
> > + <0 0x11f20000 0 0x1000>,
> > + <0 0x11f30000 0 0x1000>,
> > + <0 0x1000b000 0 0x1000>;
> > + reg-names = "gpio", "iocfg_rm",
> > + "iocfg_br", "iocfg_lm",
> > + "iocfg_lb", "iocfg_rt",
> > + "iocfg_lt", "iocfg_tl",
> > + "eint";
> > + gpio-controller;
> > + #gpio-cells = <2>;
> > + gpio-ranges = <&pio 0 0 210>;
> > + interrupt-controller;
> > + #interrupt-cells = <2>;
> > + interrupts = <GIC_SPI 204 IRQ_TYPE_LEVEL_HIGH>;
> > +
> > + mmc0_pins_default: mmc0default {
> > + pins_cmd_dat {
>
> The 2 levels of nodes here doesn't match your schema.
>
> Also, don't use '_' in node names.
>
I'll fix it in next version, thx!
> > + pinmux = <PINMUX_GPIO168__FUNC_MSDC0_DAT0>,
> > + <PINMUX_GPIO172__FUNC_MSDC0_DAT1>,
> > + <PINMUX_GPIO169__FUNC_MSDC0_DAT2>,
> > + <PINMUX_GPIO177__FUNC_MSDC0_DAT3>,
> > + <PINMUX_GPIO170__FUNC_MSDC0_DAT4>,
> > + <PINMUX_GPIO173__FUNC_MSDC0_DAT5>,
> > + <PINMUX_GPIO171__FUNC_MSDC0_DAT6>,
> > + <PINMUX_GPIO174__FUNC_MSDC0_DAT7>,
> > + <PINMUX_GPIO167__FUNC_MSDC0_CMD>;
> > + input-enable;
> > + mediatek,pull-up-adv = <1>;
> > + };
> > + pins_clk {
> > + pinmux = <PINMUX_GPIO176__FUNC_MSDC0_CLK>;
> > + mediatek,pull-down-adv = <2>;
> > + };
> > + pins_rst {
> > + pinmux = <PINMUX_GPIO178__FUNC_MSDC0_RSTB>;
> > + mediatek,pull-up-adv = <0>;
> > + };
> > + };
> > +
> > + mmc0 {
> > + pinctrl-0 = <&mmc0_pins_default>;
> > + pinctrl-names = "default";
> > + };
> > + };
> > +
> > --
> > 1.7.9.5
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