linux-kernel - Re: [PATCH 14/17] pinctrl: renesas: Move fixed assignments to 'pinctrl

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Message-ID: <CAMuHMdUHyLYk0oSN8XDNCXUvLQLe2u0k0noVJLbR+pYWDTB4+w@mail.gmail.com>
Date: Fri, 30 May 2025 10:06:16 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Linus Walleij <linus.walleij@...aro.org>, Basavaraj Natikar <Basavaraj.Natikar@....com>, 
	Shyam Sundar S K <Shyam-sundar.S-k@....com>, Andrew Jeffery <andrew@...econstruct.com.au>, 
	Joel Stanley <joel@....id.au>, Avi Fishman <avifishman70@...il.com>, 
	Tomer Maimon <tmaimon77@...il.com>, Tali Perry <tali.perry1@...il.com>, 
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	Benjamin Fair <benjaminfair@...gle.com>, Jonathan Neuschäfer <j.neuschaefer@....net>, 
	Rafał Miłecki <rafal@...ecki.pl>, 
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>, Ray Jui <rjui@...adcom.com>, 
	Scott Branden <sbranden@...adcom.com>, Geert Uytterhoeven <geert+renesas@...der.be>, 
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	Alexandre Torgue <alexandre.torgue@...s.st.com>, linux-gpio@...r.kernel.org, 
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	openbmc@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org, 
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	linux-rtc@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com, 
	Wolfram Sang <wsa+renesas@...g-engineering.com>
Subject: Re: [PATCH 14/17] pinctrl: renesas: Move fixed assignments to
 'pinctrl_desc' definition

Hi Krzysztof,

CC wsa

On Wed, 28 May 2025 at 19:55, Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
> On 28/05/2025 14:54, Geert Uytterhoeven wrote:
> >>         .pmxops = &rzn1_pmx_ops,
> >>         .confops = &rzn1_pinconf_ops,
> >>         .owner = THIS_MODULE,
> >> +       .pins = rzn1_pins,
> >> +       .npins = ARRAY_SIZE(rzn1_pins),
> >>  };
> >>
> >>  static int rzn1_pinctrl_parse_groups(struct device_node *np,
> >> @@ -878,8 +880,6 @@ static int rzn1_pinctrl_probe(struct platform_device *pdev)
> >>
> >>         ipctl->dev = &pdev->dev;
> >>         rzn1_pinctrl_desc.name = dev_name(&pdev->dev);
> >
> > ... if you would replace this assignment by a hardcoded name
> > like "pinctrl-rzn1".
>
> I saw it, but this would not be equivalent. dev_name includes platform
> bus id, e.g. pinctrl-rzn1.0 which might matter here - conflict of names.
> Are you sure this would work fine?

There can be only one anyway.
Most drivers used a fixed name:

drivers/pinctrl/renesas/pinctrl-rza1.c: rza1_pctl->desc.name = DRIVER_NAME;
drivers/pinctrl/renesas/pinctrl-rza2.c: priv->desc.name = DRIVER_NAME;
drivers/pinctrl/renesas/pinctrl-rzg2l.c: pctrl->desc.name = DRV_NAME;
drivers/pinctrl/renesas/pinctrl-rzn1.c: rzn1_pinctrl_desc.name =
dev_name(&pdev->dev);
drivers/pinctrl/renesas/pinctrl-rzt2h.c: desc->name = DRV_NAME;
drivers/pinctrl/renesas/pinctrl-rzv2m.c: pctrl->desc.name = DRV_NAME;
drivers/pinctrl/renesas/pinctrl.c: pmx->pctl_desc.name = DRV_NAME;

It might change the path in debugfs (/sys/kernel/debug/pinctrl/) though.
Wolfram?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds