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Date: Wed, 9 Nov 2022 10:55:25 +0100
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: Alexandre Mergnat <amergnat@...libre.com>,
Fabien Parent <fabien.parent@...aro.org>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Sean Wang <sean.wang@...iatek.com>,
Mark Brown <broonie@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Lee Jones <lee@...nel.org>,
Chen Zhong <chen.zhong@...iatek.com>,
Alessandro Zummo <a.zummo@...ertech.it>,
Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
Liam Girdwood <lgirdwood@...il.com>,
Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-input@...r.kernel.org,
Fabien Parent <fparent@...libre.com>,
linux-rtc@...r.kernel.org, Rob Herring <robh@...nel.org>,
linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
Mattijs Korpershoek <mkorpershoek@...libre.com>
Subject: Re: [PATCH v4 5/9] dt-bindings: soc: mediatek: convert pwrap
documentation
Il 08/11/22 19:43, Alexandre Mergnat ha scritto:
> - Convert soc/mediatek/pwrap.txt to soc/mediatek/mediatek,pwrap.yaml
> - MT8365 SoC has 2 additional clock items and a yaml schema for its PMIC
> - Remove pwrap.txt file
>
> Signed-off-by: Alexandre Mergnat <amergnat@...libre.com>
> ---
> .../devicetree/bindings/leds/leds-mt6323.txt | 2 +-
> Documentation/devicetree/bindings/mfd/mt6397.txt | 2 +-
> .../bindings/soc/mediatek/mediatek,pwrap.yaml | 158 +++++++++++++++++++++
> .../devicetree/bindings/soc/mediatek/pwrap.txt | 75 ----------
> 4 files changed, 160 insertions(+), 77 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/leds/leds-mt6323.txt b/Documentation/devicetree/bindings/leds/leds-mt6323.txt
> index 45bf9f7d85f3..73353692efa1 100644
> --- a/Documentation/devicetree/bindings/leds/leds-mt6323.txt
> +++ b/Documentation/devicetree/bindings/leds/leds-mt6323.txt
> @@ -9,7 +9,7 @@ MT6323 PMIC hardware.
> For MT6323 MFD bindings see:
> Documentation/devicetree/bindings/mfd/mt6397.txt
> For MediaTek PMIC wrapper bindings see:
> -Documentation/devicetree/bindings/soc/mediatek/pwrap.txt
> +Documentation/devicetree/bindings/soc/mediatek/mediatek,pwrap.yaml
>
> Required properties:
> - compatible : Must be "mediatek,mt6323-led"
> diff --git a/Documentation/devicetree/bindings/mfd/mt6397.txt b/Documentation/devicetree/bindings/mfd/mt6397.txt
> index 79aaf21af8e9..3bee4a42555d 100644
> --- a/Documentation/devicetree/bindings/mfd/mt6397.txt
> +++ b/Documentation/devicetree/bindings/mfd/mt6397.txt
> @@ -13,7 +13,7 @@ MT6397/MT6323 is a multifunction device with the following sub modules:
> It is interfaced to host controller using SPI interface by a proprietary hardware
> called PMIC wrapper or pwrap. MT6397/MT6323 MFD is a child device of pwrap.
> See the following for pwarp node definitions:
> -../soc/mediatek/pwrap.txt
> +../soc/mediatek/mediatek,pwrap.yaml
>
> This document describes the binding for MFD device and its sub module.
>
> diff --git a/Documentation/devicetree/bindings/soc/mediatek/mediatek,pwrap.yaml b/Documentation/devicetree/bindings/soc/mediatek/mediatek,pwrap.yaml
> new file mode 100644
> index 000000000000..fe83458b801a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/mediatek/mediatek,pwrap.yaml
> @@ -0,0 +1,158 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/soc/mediatek/mediatek,pwrap.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Mediatek PMIC Wrapper
> +
> +maintainers:
> + - Alexandre Mergnat <amergnat@...libre.com>
I say that the maintainer for pwrap is Flora Fu <flora.fu@...iatek.com>....
> +
> +description: |
> + On MediaTek SoCs the PMIC is connected via SPI. The SPI master interface
> + is not directly visible to the CPU, but only through the PMIC wrapper
> + inside the SoC. The communication between the SoC and the PMIC can
> + optionally be encrypted. Also a non standard Dual IO SPI mode can be
> + used to increase speed.
> +
> + IP Pairing
> +
> + On MT8135 the pins of some SoC internal peripherals can be on the PMIC.
> + The signals of these pins are routed over the SPI bus using the pwrap
> + bridge. In the binding description below the properties needed for bridging
> + are marked with "IP Pairing". These are optional on SoCs which do not support
> + IP Pairing
> +
> +properties:
> + compatible:
> + oneOf:
> + - items:
> + - enum:
> + - mediatek,mt2701-pwrap
..snip..
> + interrupts:
> + maxItems: 1
> + description: IRQ for pwrap in SOC
description: PMIC Wrapper interrupt
> +
> + clocks: true
> +
> + clock-names: true
> +
> + resets:
> + minItems: 1
> + items:
> + - description: PMIC wrapper reset
> + - description: IP pairing reset
> +
> + reset-names:
> + minItems: 1
> + items:
> + - const: pwrap
> + - const: pwrap-bridge
> +
> + pmic:
> + type: object
> +
> +allOf:
> + - if:
if `resets` is present, reset-names is *required*...
> + properties:
> + compatible:
> + contains:
> + const: mediatek,mt8365-pwrap
> + then:
> + properties:
> + pmic:
> + $ref: /schemas/mfd/mediatek,mt6357.yaml#
> +
> + clocks:
> + items:
> + - description: SPI bus clock
> + - description: Main module clock
> + - description: System module clock
> + - description: Timer module clock
> + clock-names:
> + items:
> + - const: spi
> + - const: wrap
> + - const: sys
> + - const: tmr
For clocks and clock-names... you can declare that globally and set
`minItems: 2` for both: this means that the first two items are mandatory,
but the last two are not.
If you really want to force a validation error when using mediatek,mt8365-pwrap
and not providing `sys` and `tmr` clocks, you can just override minItems.
> + else:
> + properties:
> + pmic:
> + description: |
You don't need this '|'.
> + List of child nodes that specify the regulators.
> + See ../../mfd/mt6397.txt for more details.
> +
> + clocks:
> + items:
> + - description: SPI bus clock
> + - description: Main module clock
> + clock-names:
> + items:
> + - const: spi
> + - const: wrap
> +
> +required:
> + - compatible
> + - reg
> + - reg-names
> + - interrupts
> + - clocks
> + - clock-names
> +
> +additionalProperties: true
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #include <dt-bindings/reset/mt8135-resets.h>
> +
> + soc {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + pwrap@...0f000 {
> + compatible = "mediatek,mt8135-pwrap";
> + reg = <0 0x1000f000 0 0x1000>, <0 0x11017000 0 0x1000>;
> + reg-names = "pwrap", "pwrap-bridge";
> + interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>;
> + resets = <&infracfg MT8135_INFRA_PMIC_WRAP_RST>,
> + <&pericfg MT8135_PERI_PWRAP_BRIDGE_SW_RST>;
Fix indentation please
resets = <&infracfg MT8135_INFRA_PMIC_WRAP_RST>,
<&pericfg MT8135_PERI_PWRAP_BRIDGE_SW_RST>;
> + reset-names = "pwrap", "pwrap-bridge";
> + clocks = <&clk26m>, <&clk26m>;
...and also, clocks/clock-names before resets/reset-names please.
> + clock-names = "spi", "wrap";
> +
> + pmic {
> + compatible = "mediatek,mt6397";
> + };
> + };
> + };
Regards,
Angelo
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