linux-kernel - Re: [DO NOT MERGE v6 17/37] dt-bindings: interrupt-controller: renesas,sh7751-intc: Add json-schema

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Date: Wed, 17 Jan 2024 18:46:10 +0900
From: Yoshinori Sato <ysato@...rs.sourceforge.jp>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: linux-sh@...r.kernel.org,	Damien Le Moal <dlemoal@...nel.org>,	Rob
 Herring <robh+dt@...nel.org>,	Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>,	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,	Michael Turquette
 <mturquette@...libre.com>,	Stephen Boyd <sboyd@...nel.org>,	Maarten
 Lankhorst <maarten.lankhorst@...ux.intel.com>,	Maxime Ripard
 <mripard@...nel.org>,	Thomas Zimmermann <tzimmermann@...e.de>,	David Airlie
 <airlied@...il.com>,	Daniel Vetter <daniel@...ll.ch>,	Thomas Gleixner
 <tglx@...utronix.de>,	Lorenzo Pieralisi <lpieralisi@...nel.org>,	Krzysztof
 Wilczyński <kw@...ux.com>,	Bjorn Helgaas
 <bhelgaas@...gle.com>,	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>,	Magnus Damm <magnus.damm@...il.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,	Rich Felker <dalias@...c.org>,
	John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,	Lee Jones
 <lee@...nel.org>,	Helge Deller <deller@....de>,	Heiko Stuebner
 <heiko@...ech.de>,	Jernej Skrabec <jernej.skrabec@...il.com>,	Chris Morgan
 <macromorgan@...mail.com>,	Yang Xiwen <forbidden405@...mail.com>,	Sebastian
 Reichel <sre@...nel.org>,	Randy Dunlap <rdunlap@...radead.org>,	Arnd
 Bergmann <arnd@...db.de>,	Vlastimil Babka <vbabka@...e.cz>,	Hyeonggon Yoo
 <42.hyeyoo@...il.com>,	David Rientjes <rientjes@...gle.com>,	Baoquan He
 <bhe@...hat.com>,	Andrew Morton <akpm@...ux-foundation.org>,	Guenter Roeck
 <linux@...ck-us.net>,	Stephen Rothwell <sfr@...b.auug.org.au>,	Azeem Shaikh
 <azeemshaikh38@...il.com>,	Javier Martinez Canillas <javierm@...hat.com>,
	Max Filippov <jcmvbkbc@...il.com>,	Palmer Dabbelt <palmer@...osinc.com>,
	Bin Meng <bmeng@...ylab.org>,	Jonathan Corbet <corbet@....net>,	Jacky Huang
 <ychuang3@...oton.com>,	Lukas Bulwahn <lukas.bulwahn@...il.com>,	Biju Das
 <biju.das.jz@...renesas.com>,	Uwe Kleine-König
 <u.kleine-koenig@...gutronix.de>,	Sam Ravnborg <sam@...nborg.org>,	Sergey
 Shtylyov <s.shtylyov@....ru>,	Michael Karcher
 <kernel@...rcher.dialup.fu-berlin.de>,	Laurent Pinchart
 <laurent.pinchart+renesas@...asonboard.com>,	linux-ide@...r.kernel.org,
	devicetree@...r.kernel.org,	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,	linux-clk@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,	linux-pci@...r.kernel.org,
	linux-serial@...r.kernel.org,	linux-fbdev@...r.kernel.org
Subject: Re: [DO NOT MERGE v6 17/37] dt-bindings: interrupt-controller: renesas,sh7751-intc: Add json-schema

On Tue, 09 Jan 2024 21:30:34 +0900,
Linus Walleij wrote:
> 
> Hi Yoshinori,
> 
> thanks for your patch!
> 
> On Tue, Jan 9, 2024 at 9:24 AM Yoshinori Sato
> <ysato@...rs.sourceforge.jp> wrote:
> 
> > +  renesas,icr-irlm:
> > +    $ref: /schemas/types.yaml#/definitions/flag
> > +    description: If true four independent interrupt requests mode (ICRIRLM is 1).
> > +
> > +  renesas,ipr-map:
> > +    $ref: /schemas/types.yaml#/definitions/uint32-array
> > +    description: |
> > +      IRQ to IPR mapping definition.
> > +      1st - INTEVT code
> > +      2nd - Register
> > +      3rd - bit index
> 
> (...)
> 
> > +            renesas,ipr-map = <0x240 IPRD IPR_B12>, /* IRL0 */
> > +                              <0x2a0 IPRD IPR_B8>,  /* IRL1 */
> > +                              <0x300 IPRD IPR_B4>,  /* IRL2 */
> > +                              <0x360 IPRD IPR_B0>,  /* IRL3 */
> (...)
> 
> Is it really necessary to have all this in the device tree?
> 
> You know from the compatible that this is "renesas,sh7751-intc"
> and I bet this table will be the same for any sh7751 right?
> 
> Then just put it in a table in the driver instead and skip this from
> the device tree and bindings. If more interrupt controllers need
> to be supported by the driver, you can simply look up the table from
> the compatible string.

The SH interrupt controller has the same structure, only this part is different for each SoC.
Currently, we are targeting only the 7751, but in the future we plan to handle all SoCs.
Is it better to differentiate SoC only by compatible?

> Yours,
> Linus Walleij
> 

-- 
Yosinori Sato