linux-kernel - Re: [PATCH] i2c: ocores: Move system PM hooks to the NOIRQ phase

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Message-ID: <20230727003551.dtjx3shwpjs3le6x@intel.intel>
Date:   Thu, 27 Jul 2023 02:35:51 +0200
From:   Andi Shyti <andi.shyti@...nel.org>
To:     Samuel Holland <samuel.holland@...ive.com>
Cc:     Peter Korsgaard <peter@...sgaard.com>,
        Andrew Lunn <andrew@...n.ch>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: ocores: Move system PM hooks to the NOIRQ phase

Hi Samuel,

On Mon, Jul 17, 2023 at 01:38:57PM -0700, Samuel Holland wrote:
> When an I2C device contains a wake IRQ subordinate to a regmap-irq chip,
> the regmap-irq code must be able to perform I2C transactions during
> suspend_device_irqs() and resume_device_irqs(). Therefore, the bus must
> be suspended/resumed during the NOIRQ phase.
> 
> Signed-off-by: Samuel Holland <samuel.holland@...ive.com>

it's OK for me.

Peter, any comment on this?

Andi

> ---
> 
>  drivers/i2c/busses/i2c-ocores.c | 11 ++++-------
>  1 file changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
> index 4ac77e57bbbf..b1f621d42910 100644
> --- a/drivers/i2c/busses/i2c-ocores.c
> +++ b/drivers/i2c/busses/i2c-ocores.c
> @@ -743,7 +743,6 @@ static void ocores_i2c_remove(struct platform_device *pdev)
>  	i2c_del_adapter(&i2c->adap);
>  }
>  
> -#ifdef CONFIG_PM_SLEEP
>  static int ocores_i2c_suspend(struct device *dev)
>  {
>  	struct ocores_i2c *i2c = dev_get_drvdata(dev);
> @@ -772,11 +771,9 @@ static int ocores_i2c_resume(struct device *dev)
>  	return ocores_init(dev, i2c);
>  }
>  
> -static SIMPLE_DEV_PM_OPS(ocores_i2c_pm, ocores_i2c_suspend, ocores_i2c_resume);
> -#define OCORES_I2C_PM	(&ocores_i2c_pm)
> -#else
> -#define OCORES_I2C_PM	NULL
> -#endif
> +static const struct dev_pm_ops ocores_i2c_pm_ops = {
> +	NOIRQ_SYSTEM_SLEEP_PM_OPS(ocores_i2c_suspend, ocores_i2c_resume)
> +};
>  
>  static struct platform_driver ocores_i2c_driver = {
>  	.probe   = ocores_i2c_probe,
> @@ -784,7 +781,7 @@ static struct platform_driver ocores_i2c_driver = {
>  	.driver  = {
>  		.name = "ocores-i2c",
>  		.of_match_table = ocores_i2c_match,
> -		.pm = OCORES_I2C_PM,
> +		.pm = &ocores_i2c_pm_ops,
>  	},
>  };
>  
> -- 
> 2.40.1
>