linux-kernel - Re: [PATCH 14/23] i2c: nomadik: Remove #ifdef guards for PM related functions

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Message-ID: <20230706104153.00007c5f@Huawei.com>
Date:   Thu, 6 Jul 2023 10:41:53 +0800
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Paul Cercueil <paul@...pouillou.net>
CC:     Wolfram Sang <wsa@...nel.org>, <linux-i2c@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 14/23] i2c: nomadik: Remove #ifdef guards for PM related
 functions

On Wed,  5 Jul 2023 22:43:05 +0200
Paul Cercueil <paul@...pouillou.net> wrote:

> Use the new PM macros for the suspend and resume functions to be
> automatically dropped by the compiler when CONFIG_PM or
> CONFIG_PM_SLEEP are disabled, without having to use #ifdef guards.
> 
> This has the advantage of always compiling these functions in,
> independently of any Kconfig option. Thanks to that, bugs and other
> regressions are subsequently easier to catch.
> 
> Signed-off-by: Paul Cercueil <paul@...pouillou.net>
> 
Might be worth rewrapping the runtime pm line. Otherwise LGTM

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Cc: linux-arm-kernel@...ts.infradead.org
> ---
>  drivers/i2c/busses/i2c-nomadik.c | 14 +++++---------
>  1 file changed, 5 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
> index 1e5fd23ef45c..4a4b5bc257ae 100644
> --- a/drivers/i2c/busses/i2c-nomadik.c
> +++ b/drivers/i2c/busses/i2c-nomadik.c
> @@ -873,7 +873,6 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
>  	return IRQ_HANDLED;
>  }
>  
> -#ifdef CONFIG_PM_SLEEP
>  static int nmk_i2c_suspend_late(struct device *dev)
>  {
>  	int ret;
> @@ -890,9 +889,7 @@ static int nmk_i2c_resume_early(struct device *dev)
>  {
>  	return pm_runtime_force_resume(dev);
>  }
> -#endif
>  
> -#ifdef CONFIG_PM
>  static int nmk_i2c_runtime_suspend(struct device *dev)
>  {
>  	struct amba_device *adev = to_amba_device(dev);
> @@ -925,13 +922,12 @@ static int nmk_i2c_runtime_resume(struct device *dev)
>  
>  	return ret;
>  }
> -#endif
>  
>  static const struct dev_pm_ops nmk_i2c_pm = {
> -	SET_LATE_SYSTEM_SLEEP_PM_OPS(nmk_i2c_suspend_late, nmk_i2c_resume_early)
> -	SET_RUNTIME_PM_OPS(nmk_i2c_runtime_suspend,
> -			nmk_i2c_runtime_resume,
> -			NULL)
> +	LATE_SYSTEM_SLEEP_PM_OPS(nmk_i2c_suspend_late, nmk_i2c_resume_early)
> +	RUNTIME_PM_OPS(nmk_i2c_runtime_suspend,
> +		       nmk_i2c_runtime_resume,
> +		       NULL)

rewrap?

>  };
>  
>  static unsigned int nmk_i2c_functionality(struct i2c_adapter *adap)
> @@ -1080,7 +1076,7 @@ static struct amba_driver nmk_i2c_driver = {
>  	.drv = {
>  		.owner = THIS_MODULE,
>  		.name = DRIVER_NAME,
> -		.pm = &nmk_i2c_pm,
> +		.pm = pm_ptr(&nmk_i2c_pm),
>  	},
>  	.id_table = nmk_i2c_ids,
>  	.probe = nmk_i2c_probe,