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Date: Tue, 10 Mar 2020 15:13:52 -0500
From: Rob Herring <robh@...nel.org>
To: Paul Cercueil <paul@...pouillou.net>
Cc: Daniel Lezcano <daniel.lezcano@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Mark Rutland <mark.rutland@....com>,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
od@...c.me, 周琰杰 <zhouyanjie@...yeetech.com>
Subject: Re: [PATCH v2] dt-bindings: timer: Convert ingenic,tcu.txt to YAML
On Tue, Mar 03, 2020 at 11:55:43AM -0300, Paul Cercueil wrote:
> @Rob:
>
>
> Le lun., mars 2, 2020 at 17:05, Paul Cercueil <paul@...pouillou.net> a écrit
> :
> > Convert the ingenic,tcu.txt file to YAML.
> >
> > Signed-off-by: Paul Cercueil <paul@...pouillou.net>
> > ---
> >
> > @Daniel:
> >
> > As for v1, if Rob acks it, please take this patch to your tree, since
> > the .txt file was modified there. Going through your tree would avoid a
> > merge conflict.
> >
> > Thanks,
> > -Paul
> >
> > Changelog:
> > v2: - Add missing 'reg' properties to child nodes
> > - Removed 'additionalProperties: false' on child objects which
> > included external YAML
> > - Add description of interrupts
> > - Fix pattern regex
> > - Add missing ingenic,jz4780-tcu compatible string (which requires
> > fallback to ingenic,jz4770-tcu)
> > - Add 'select' to fix matching of schema
> >
> > .../devicetree/bindings/timer/ingenic,tcu.txt | 138 ---------
> > .../bindings/timer/ingenic,tcu.yaml | 269 ++++++++++++++++++
> > 2 files changed, 269 insertions(+), 138 deletions(-)
> > delete mode 100644
> > Documentation/devicetree/bindings/timer/ingenic,tcu.txt
> > create mode 100644
> > Documentation/devicetree/bindings/timer/ingenic,tcu.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/timer/ingenic,tcu.txt
> > b/Documentation/devicetree/bindings/timer/ingenic,tcu.txt
> > deleted file mode 100644
> > index 91f704951845..000000000000
> > --- a/Documentation/devicetree/bindings/timer/ingenic,tcu.txt
> > +++ /dev/null
> > @@ -1,138 +0,0 @@
> > -Ingenic JZ47xx SoCs Timer/Counter Unit devicetree bindings
> > -==========================================================
> > -
> > -For a description of the TCU hardware and drivers, have a look at
> > -Documentation/mips/ingenic-tcu.rst.
> > -
> > -Required properties:
> > -
> > -- compatible: Must be one of:
> > - * ingenic,jz4740-tcu
> > - * ingenic,jz4725b-tcu
> > - * ingenic,jz4770-tcu
> > - * ingenic,x1000-tcu
> > - followed by "simple-mfd".
> > -- reg: Should be the offset/length value corresponding to the TCU
> > registers
> > -- clocks: List of phandle & clock specifiers for clocks external to the
> > TCU.
> > - The "pclk", "rtc" and "ext" clocks should be provided. The "tcu"
> > clock
> > - should be provided if the SoC has it.
> > -- clock-names: List of name strings for the external clocks.
> > -- #clock-cells: Should be <1>;
> > - Clock consumers specify this argument to identify a clock. The valid
> > values
> > - may be found in <dt-bindings/clock/ingenic,tcu.h>.
> > -- interrupt-controller : Identifies the node as an interrupt controller
> > -- #interrupt-cells : Specifies the number of cells needed to encode an
> > - interrupt source. The value should be 1.
> > -- interrupts : Specifies the interrupt the controller is connected to.
> > -
> > -Optional properties:
> > -
> > -- ingenic,pwm-channels-mask: Bitmask of TCU channels reserved for PWM
> > use.
> > - Default value is 0xfc.
> > -
> > -
> > -Children nodes
> > -==========================================================
> > -
> > -
> > -PWM node:
> > ----------
> > -
> > -Required properties:
> > -
> > -- compatible: Must be one of:
> > - * ingenic,jz4740-pwm
> > - * ingenic,jz4725b-pwm
> > -- #pwm-cells: Should be 3. See ../pwm/pwm.yaml for a description of the
> > cell
> > - format.
> > -- clocks: List of phandle & clock specifiers for the TCU clocks.
> > -- clock-names: List of name strings for the TCU clocks.
> > -
> > -
> > -Watchdog node:
> > ---------------
> > -
> > -Required properties:
> > -
> > -- compatible: Must be "ingenic,jz4740-watchdog"
> > -- clocks: phandle to the WDT clock
> > -- clock-names: should be "wdt"
> > -
> > -
> > -OS Timer node:
> > ----------
> > -
> > -Required properties:
> > -
> > -- compatible: Must be one of:
> > - * ingenic,jz4725b-ost
> > - * ingenic,jz4770-ost
> > -- clocks: phandle to the OST clock
> > -- clock-names: should be "ost"
> > -- interrupts : Specifies the interrupt the OST is connected to.
> > -
> > -
> > -Example
> > -==========================================================
> > -
> > -#include <dt-bindings/clock/jz4770-cgu.h>
> > -#include <dt-bindings/clock/ingenic,tcu.h>
> > -
> > -/ {
> > - tcu: timer@...02000 {
> > - compatible = "ingenic,jz4770-tcu", "simple-mfd";
> > - reg = <0x10002000 0x1000>;
> > - #address-cells = <1>;
> > - #size-cells = <1>;
> > - ranges = <0x0 0x10002000 0x1000>;
> > -
> > - #clock-cells = <1>;
> > -
> > - clocks = <&cgu JZ4770_CLK_RTC
> > - &cgu JZ4770_CLK_EXT
> > - &cgu JZ4770_CLK_PCLK>;
> > - clock-names = "rtc", "ext", "pclk";
> > -
> > - interrupt-controller;
> > - #interrupt-cells = <1>;
> > -
> > - interrupt-parent = <&intc>;
> > - interrupts = <27 26 25>;
> > -
> > - watchdog: watchdog@0 {
> > - compatible = "ingenic,jz4740-watchdog";
> > - reg = <0x0 0xc>;
> > -
> > - clocks = <&tcu TCU_CLK_WDT>;
> > - clock-names = "wdt";
> > - };
> > -
> > - pwm: pwm@40 {
> > - compatible = "ingenic,jz4740-pwm";
> > - reg = <0x40 0x80>;
> > -
> > - #pwm-cells = <3>;
> > -
> > - clocks = <&tcu TCU_CLK_TIMER0
> > - &tcu TCU_CLK_TIMER1
> > - &tcu TCU_CLK_TIMER2
> > - &tcu TCU_CLK_TIMER3
> > - &tcu TCU_CLK_TIMER4
> > - &tcu TCU_CLK_TIMER5
> > - &tcu TCU_CLK_TIMER6
> > - &tcu TCU_CLK_TIMER7>;
> > - clock-names = "timer0", "timer1", "timer2", "timer3",
> > - "timer4", "timer5", "timer6", "timer7";
> > - };
> > -
> > - ost: timer@e0 {
> > - compatible = "ingenic,jz4770-ost";
> > - reg = <0xe0 0x20>;
> > -
> > - clocks = <&tcu TCU_CLK_OST>;
> > - clock-names = "ost";
> > -
> > - interrupts = <15>;
> > - };
> > - };
> > -};
> > diff --git a/Documentation/devicetree/bindings/timer/ingenic,tcu.yaml
> > b/Documentation/devicetree/bindings/timer/ingenic,tcu.yaml
> > new file mode 100644
> > index 000000000000..14b68c87319f
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/timer/ingenic,tcu.yaml
> > @@ -0,0 +1,269 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/timer/ingenic,tcu.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Ingenic SoCs Timer/Counter Unit (TCU) devicetree bindings
> > +
> > +description: |
> > + For a description of the TCU hardware and drivers, have a look at
> > + Documentation/mips/ingenic-tcu.rst.
> > +
> > +maintainers:
> > + - Paul Cercueil <paul@...pouillou.net>
> > +
> > +select:
> > + properties:
> > + compatible:
> > + contains:
> > + enum:
> > + - ingenic,jz4740-tcu
> > + - ingenic,jz4725b-tcu
> > + - ingenic,jz4770-tcu
> > + - ingenic,jz4780-tcu
> > + - ingenic,x1000-tcu
> > + required:
> > + - compatible
> > +
> > +properties:
> > + $nodename:
> > + pattern: "^timer@[0-9a-f]+$"
> > +
> > + "#address-cells":
> > + const: 1
> > +
> > + "#size-cells":
> > + const: 1
> > +
> > + "#clock-cells":
> > + const: 1
> > +
> > + "#interrupt-cells":
> > + const: 1
> > +
> > + interrupt-controller: true
> > +
> > + ranges: true
> > +
> > + compatible:
> > + oneOf:
> > + - items:
> > + - enum:
> > + - ingenic,jz4740-tcu
> > + - ingenic,jz4725b-tcu
> > + - ingenic,jz4770-tcu
> > + - ingenic,x1000-tcu
> > + - const: simple-mfd
> > + - items:
> > + - const: ingenic,jz4780-tcu
> > + - const: ingenic,jz4770-tcu
> > + - const: simple-mfd
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + clocks:
> > + items:
> > + - description: RTC clock
> > + - description: EXT clock
> > + - description: PCLK clock
> > + - description: TCU clock
> > + minItems: 3
> > +
> > + clock-names:
> > + items:
> > + - const: rtc
> > + - const: ext
> > + - const: pclk
> > + - const: tcu
> > + minItems: 3
> > +
> > + interrupts:
> > + items:
> > + - description: TCU0 interrupt
> > + - description: TCU1 interrupt
> > + - description: TCU2 interrupt
> > + minItems: 1
> > +
> > + ingenic,pwm-channels-mask:
> > + description: Bitmask of TCU channels reserved for PWM use.
> > + allOf:
> > + - $ref: /schemas/types.yaml#/definitions/uint32
> > + - minimum: 0x00
> > + - maximum: 0xff
> > + - default: 0xfc
> > +
> > +patternProperties:
> > + "^watchdog@[a-f0-9]+$":
> > + type: object
> > + allOf: [ $ref: ../watchdog/watchdog.yaml# ]
> > + properties:
> > + compatible:
> > + oneOf:
> > + - enum:
> > + - ingenic,jz4740-watchdog
> > + - ingenic,jz4780-watchdog
> > + - items:
> > + - const: ingenic,jz4770-watchdog
> > + - const: ingenic,jz4740-watchdog
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + clocks:
> > + maxItems: 1
> > +
> > + clock-names:
> > + const: wdt
> > +
> > + required:
> > + - compatible
> > + - reg
> > + - clocks
> > + - clock-names
> > +
> > + "^pwm@[a-f0-9]+$":
> > + type: object
> > + allOf: [ $ref: ../pwm/pwm.yaml# ]
> > + properties:
> > + compatible:
> > + oneOf:
> > + - enum:
> > + - ingenic,jz4740-pwm
> > + - items:
> > + - enum:
> > + - ingenic,jz4770-pwm
> > + - ingenic,jz4780-pwm
> > + - const: ingenic,jz4740-pwm
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + clocks:
> > + minItems: 6
> > + maxItems: 8
> > +
> > + clock-names:
> > + items:
> > + - const: timer0
> > + - const: timer1
> > + - const: timer2
> > + - const: timer3
> > + - const: timer4
> > + - const: timer5
> > + - const: timer6
> > + - const: timer7
> > + minItems: 6
> > +
> > + required:
> > + - compatible
> > + - reg
> > + - clocks
> > + - clock-names
> > +
> > + "^timer@[a-f0-9]+$":
> > + type: object
> > + properties:
> > + compatible:
> > + oneOf:
> > + - enum:
> > + - ingenic,jz4725b-ost
> > + - ingenic,jz4770-ost
> > + - items:
> > + - const: ingenic,jz4780-ost
> > + - const: ingenic,jz4770-ost
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + clocks:
> > + maxItems: 1
> > +
> > + clock-names:
> > + const: ost
> > +
> > + interrupts:
> > + maxItems: 1
> > +
> > + required:
> > + - compatible
> > + - reg
> > + - clocks
> > + - clock-names
> > + - interrupts
> > +
> > + additionalProperties: false
> > +
> > +required:
> > + - "#clock-cells"
> > + - "#interrupt-cells"
> > + - interrupt-controller
> > + - compatible
> > + - reg
> > + - clocks
> > + - clock-names
> > + - interrupts
> > +
> > +additionalProperties: false
>
> Actually this prevents the 'assigned-clock' properties from being added. I
> was expecting these to be always accepted, akin to the 'pinctrl-*'
> properties.
>
> Should I add entries for these here?
Yes, I think so. The assigned-clocks properties are a lot less common
than pinctrl and I think it's good to define how many entries they have.
Otherwise, this looks fine.
Rob
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