linux-kernel - Re: [PATCH 07/12] memory: stm32-fmc2-ebi: add runtime PM support

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Date: Tue, 13 Feb 2024 08:59:05 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Christophe Kerello <christophe.kerello@...s.st.com>,
 miquel.raynal@...tlin.com, richard@....at, vigneshr@...com,
 robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org
Cc: linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-stm32@...md-mailman.stormreply.com, devicetree@...r.kernel.org
Subject: Re: [PATCH 07/12] memory: stm32-fmc2-ebi: add runtime PM support

On 12/02/2024 18:48, Christophe Kerello wrote:
> Add runtime PM support in FMC2 ebi driver to be able to manage GENPD
> support when it will be enabled.

You don't do any real runtime PM here (turning on PM domain on probe is
not real PM), so please explain what is the goal of it and say that it
is basic RPM for keeping domain on.

> 
> Signed-off-by: Christophe Kerello <christophe.kerello@...s.st.com>
> ---
>  drivers/memory/stm32-fmc2-ebi.c | 40 ++++++++++++++++++++++++++-------
>  1 file changed, 32 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/memory/stm32-fmc2-ebi.c b/drivers/memory/stm32-fmc2-ebi.c
> index 04248c15832f..8c30e56be3b0 100644
> --- a/drivers/memory/stm32-fmc2-ebi.c
> +++ b/drivers/memory/stm32-fmc2-ebi.c
> @@ -11,6 +11,7 @@
>  #include <linux/of_platform.h>
>  #include <linux/pinctrl/consumer.h>
>  #include <linux/platform_device.h>
> +#include <linux/pm_runtime.h>
>  #include <linux/regmap.h>
>  #include <linux/reset.h>
>  
> @@ -1381,6 +1382,7 @@ static int stm32_fmc2_ebi_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	ebi->dev = dev;
> +	platform_set_drvdata(pdev, ebi);

Does not look related.


Best regards,
Krzysztof