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Date: Wed, 19 Jan 2022 09:30:28 -0600
From: Rob Herring <robh@...nel.org>
To: Arnaud POULIQUEN <arnaud.pouliquen@...s.st.com>
Cc: devicetree@...r.kernel.org,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
Vinod Koul <vkoul@...nel.org>,
Georgi Djakov <djakov@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Marc Zyngier <maz@...nel.org>, Joerg Roedel <joro@...tes.org>,
Lee Jones <lee.jones@...aro.org>,
Daniel Thompson <daniel.thompson@...aro.org>,
Jingoo Han <jingoohan1@...il.com>, Pavel Machek <pavel@....cz>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
Jakub Kicinski <kuba@...nel.org>,
Wolfgang Grandegger <wg@...ndegger.com>,
Marc Kleine-Budde <mkl@...gutronix.de>,
Andrew Lunn <andrew@...n.ch>,
Vivien Didelot <vivien.didelot@...il.com>,
Florian Fainelli <f.fainelli@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
Kalle Valo <kvalo@...nel.org>,
Viresh Kumar <vireshk@...nel.org>,
Stephen Boyd <sboyd@...nel.org>,
Kishon Vijay Abraham I <kishon@...com>,
Linus Walleij <linus.walleij@...aro.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Kevin Hilman <khilman@...nel.org>,
Ulf Hansson <ulf.hansson@...aro.org>,
Sebastian Reichel <sre@...nel.org>,
Mark Brown <broonie@...nel.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Zhang Rui <rui.zhang@...el.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Sudeep Holla <sudeep.holla@....com>,
Geert Uytterhoeven <geert+renesas@...der.be>,
"open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers)"
<linux-ide@...r.kernel.org>,
"open list:HARDWARE RANDOM NUMBER GENERATOR CORE"
<linux-crypto@...r.kernel.org>,
dri-devel <dri-devel@...ts.freedesktop.org>,
"open list:DMA GENERIC OFFLOAD ENGINE SUBSYSTEM"
<dmaengine@...r.kernel.org>,
"open list:THERMAL" <linux-pm@...r.kernel.org>,
Linux IOMMU <iommu@...ts.linux-foundation.org>,
Linux LED Subsystem <linux-leds@...r.kernel.org>,
Linux Media Mailing List <linux-media@...r.kernel.org>,
netdev <netdev@...r.kernel.org>, linux-can@...r.kernel.org,
linux-wireless <linux-wireless@...r.kernel.org>,
"open list:GENERIC PHY FRAMEWORK" <linux-phy@...ts.infradead.org>,
"open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
linux-riscv <linux-riscv@...ts.infradead.org>,
"open list:REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM"
<linux-remoteproc@...r.kernel.org>,
Linux-ALSA <alsa-devel@...a-project.org>,
Linux USB List <linux-usb@...r.kernel.org>
Subject: Re: [PATCH] dt-bindings: Improve phandle-array schemas
On Wed, Jan 19, 2022 at 9:22 AM Arnaud POULIQUEN
<arnaud.pouliquen@...s.st.com> wrote:
>
> Hello Rob,
>
> On 1/19/22 2:50 AM, Rob Herring wrote:
> > The 'phandle-array' type is a bit ambiguous. It can be either just an
> > array of phandles or an array of phandles plus args. Many schemas for
> > phandle-array properties aren't clear in the schema which case applies
> > though the description usually describes it.
> >
> > The array of phandles case boils down to needing:
> >
> > items:
> > maxItems: 1
> >
> > The phandle plus args cases should typically take this form:
> >
> > items:
> > - items:
> > - description: A phandle
> > - description: 1st arg cell
> > - description: 2nd arg cell
> >
> > With this change, some examples need updating so that the bracketing of
> > property values matches the schema.
> >
> > Cc: Damien Le Moal <damien.lemoal@...nsource.wdc.com>
> > Cc: Herbert Xu <herbert@...dor.apana.org.au>
> > Cc: "David S. Miller" <davem@...emloft.net>
> > Cc: Chun-Kuang Hu <chunkuang.hu@...nel.org>
> > Cc: Philipp Zabel <p.zabel@...gutronix.de>
> > Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> > Cc: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
> > Cc: Vinod Koul <vkoul@...nel.org>
> > Cc: Georgi Djakov <djakov@...nel.org>
> > Cc: Thomas Gleixner <tglx@...utronix.de>
> > Cc: Marc Zyngier <maz@...nel.org>
> > Cc: Joerg Roedel <joro@...tes.org>
> > Cc: Lee Jones <lee.jones@...aro.org>
> > Cc: Daniel Thompson <daniel.thompson@...aro.org>
> > Cc: Jingoo Han <jingoohan1@...il.com>
> > Cc: Pavel Machek <pavel@....cz>
> > Cc: Mauro Carvalho Chehab <mchehab@...nel.org>
> > Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
> > Cc: Jakub Kicinski <kuba@...nel.org>
> > Cc: Wolfgang Grandegger <wg@...ndegger.com>
> > Cc: Marc Kleine-Budde <mkl@...gutronix.de>
> > Cc: Andrew Lunn <andrew@...n.ch>
> > Cc: Vivien Didelot <vivien.didelot@...il.com>
> > Cc: Florian Fainelli <f.fainelli@...il.com>
> > Cc: Vladimir Oltean <olteanv@...il.com>
> > Cc: Kalle Valo <kvalo@...nel.org>
> > Cc: Viresh Kumar <vireshk@...nel.org>
> > Cc: Stephen Boyd <sboyd@...nel.org>
> > Cc: Kishon Vijay Abraham I <kishon@...com>
> > Cc: Linus Walleij <linus.walleij@...aro.org>
> > Cc: "Rafael J. Wysocki" <rafael@...nel.org>
> > Cc: Kevin Hilman <khilman@...nel.org>
> > Cc: Ulf Hansson <ulf.hansson@...aro.org>
> > Cc: Sebastian Reichel <sre@...nel.org>
> > Cc: Mark Brown <broonie@...nel.org>
> > Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
> > Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
> > Cc: Zhang Rui <rui.zhang@...el.com>
> > Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > Cc: Thierry Reding <thierry.reding@...il.com>
> > Cc: Jonathan Hunter <jonathanh@...dia.com>
> > Cc: Sudeep Holla <sudeep.holla@....com>
> > Cc: Geert Uytterhoeven <geert+renesas@...der.be>
> > Cc: linux-ide@...r.kernel.org
> > Cc: linux-crypto@...r.kernel.org
> > Cc: dri-devel@...ts.freedesktop.org
> > Cc: dmaengine@...r.kernel.org
> > Cc: linux-pm@...r.kernel.org
> > Cc: iommu@...ts.linux-foundation.org
> > Cc: linux-leds@...r.kernel.org
> > Cc: linux-media@...r.kernel.org
> > Cc: netdev@...r.kernel.org
> > Cc: linux-can@...r.kernel.org
> > Cc: linux-wireless@...r.kernel.org
> > Cc: linux-phy@...ts.infradead.org
> > Cc: linux-gpio@...r.kernel.org
> > Cc: linux-riscv@...ts.infradead.org
> > Cc: linux-remoteproc@...r.kernel.org
> > Cc: alsa-devel@...a-project.org
> > Cc: linux-usb@...r.kernel.org
> > Signed-off-by: Rob Herring <robh@...nel.org>
> > ---
>
> [...]
>
> > .../bindings/remoteproc/st,stm32-rproc.yaml | 33 ++++++--
>
> [...]
>
> > diff --git a/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml
> > index b587c97c282b..be3d9b0e876b 100644
> > --- a/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml
> > +++ b/Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml
> > @@ -29,17 +29,22 @@ properties:
> >
> > st,syscfg-holdboot:
> > description: remote processor reset hold boot
> > - - Phandle of syscon block.
> > - - The offset of the hold boot setting register.
> > - - The field mask of the hold boot.
> > $ref: "/schemas/types.yaml#/definitions/phandle-array"
> > - maxItems: 1
> > + items:
> > + - items:
> > + - description: Phandle of syscon block
> > + - description: The offset of the hold boot setting register
> > + - description: The field mask of the hold boot
> >
> > st,syscfg-tz:
> > description:
> > Reference to the system configuration which holds the RCC trust zone mode
> > $ref: "/schemas/types.yaml#/definitions/phandle-array"
> > - maxItems: 1
> > + items:
> > + - items:
> > + - description: Phandle of syscon block
> > + - description: FIXME
> > + - description: FIXME
>
> - description: The offset of the trust zone setting register
> - description: The field mask of the trust zone state
>
> >
> > interrupts:
> > description: Should contain the WWDG1 watchdog reset interrupt
> > @@ -93,20 +98,32 @@ properties:
> > $ref: "/schemas/types.yaml#/definitions/phandle-array"
> > description: |
> > Reference to the system configuration which holds the remote
> > - maxItems: 1
> > + items:
> > + - items:
> > + - description: Phandle of syscon block
> > + - description: FIXME
> > + - description: FIXME
>
> - description: The offset of the power setting register
> - description: The field mask of the PDDS selection
>
> >
> > st,syscfg-m4-state:
> > $ref: "/schemas/types.yaml#/definitions/phandle-array"
> > description: |
> > Reference to the tamp register which exposes the Cortex-M4 state.
> > - maxItems: 1
> > + items:
> > + - items:
> > + - description: Phandle of syscon block with the tamp register
> > + - description: FIXME
> > + - description: FIXME
>
> - description: The offset of the tamp register
> - description: The field mask of the Cortex-M4 state
>
> >
> > st,syscfg-rsc-tbl:
> > $ref: "/schemas/types.yaml#/definitions/phandle-array"
> > description: |
> > Reference to the tamp register which references the Cortex-M4
> > resource table address.
> > - maxItems: 1
> > + items:
> > + - items:
> > + - description: Phandle of syscon block with the tamp register
> > + - description: FIXME
> > + - description: FIXME
>
> - description: The offset of the tamp register
> - description: The field mask of the Cortex-M4 resource table address
>
> Please tell me if you prefer that I fix this in a dedicated patch.
Thanks! I'll fold this into this patch.
Rob
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