linux-kernel - Re: [PATCH] mfd/cpuidle: ux500: Rename driver symbol

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Date:   Thu, 5 Aug 2021 14:24:26 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     linux-kernel@...r.kernel.org,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH] mfd/cpuidle: ux500: Rename driver symbol

On Mon, 02 Aug 2021, Linus Walleij wrote:

> The PRCMU driver defines this as a DT node but there are no bindings
> for it and it needs no data from the device tree. Just spawn the
> device directly in the same way as the watchdog.
> 
> Name it "db8500-cpuidle" since there are no ambitions to support any
> more SoCs than this one.
> 
> This rids this annoying boot message:
> [    0.032610] cpuidle-dbx500: Failed to locate of_node [id: 0]
> 
> However I think the device still spawns and work just fine, despite
> not finding a device tree node.
> 
> Cc: Rafael J. Wysocki <rjw@...ysocki.net>
> Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
> Cc: linux-pm@...r.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> Rafael/Daniel: it would be perfect if one of you could ACK
> this so that Lee can just merge this into the MFD tree as
> a non-urgent fix.
> ---
>  drivers/cpuidle/cpuidle-ux500.c | 2 +-
>  drivers/mfd/db8500-prcmu.c      | 6 ++++--
>  2 files changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/cpuidle/cpuidle-ux500.c b/drivers/cpuidle/cpuidle-ux500.c
> index a2d34be17a09..f7d778580e9b 100644
> --- a/drivers/cpuidle/cpuidle-ux500.c
> +++ b/drivers/cpuidle/cpuidle-ux500.c
> @@ -117,7 +117,7 @@ static int dbx500_cpuidle_probe(struct platform_device *pdev)
>  
>  static struct platform_driver dbx500_cpuidle_plat_driver = {
>  	.driver = {
> -		.name = "cpuidle-dbx500",
> +		.name = "db8500-cpuidle",
>  	},
>  	.probe = dbx500_cpuidle_probe,
>  };
> diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
> index 75049cf38832..64dd4f9a1e49 100644
> --- a/drivers/mfd/db8500-prcmu.c
> +++ b/drivers/mfd/db8500-prcmu.c
> @@ -2951,14 +2951,16 @@ static const struct mfd_cell common_prcmu_devs[] = {
>  		.pdata_size = sizeof(db8500_wdt_pdata),
>  		.id = -1,
>  	},
> +	{
> +		.name = "db8500-cpuidle",
> +		.id = -1,
> +	},
>  };
>  
>  static const struct mfd_cell db8500_prcmu_devs[] = {
>  	MFD_CELL_OF("db8500-prcmu-regulators", NULL,
>  		    &db8500_regulators, sizeof(db8500_regulators), 0,
>  		    "stericsson,db8500-prcmu-regulator"),
> -	MFD_CELL_OF("cpuidle-dbx500",
> -		    NULL, NULL, 0, 0, "stericsson,cpuidle-dbx500"),

Probably neater (with less semantic changes) if you just used:

  MFD_CELL_NAME()

>  	MFD_CELL_OF("db8500-thermal",
>  		    NULL, NULL, 0, 0, "stericsson,db8500-thermal"),
>  };

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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