linux-kernel - Re: [PATCH 6/7] memory: renesas-rpc-if: Pass device instead of rpcif to rpcif

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Date:   Thu, 30 Jun 2022 09:25:52 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Vignesh Raghavendra <vigneshr@...com>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Richard Weinberger <richard@....at>,
        Mark Brown <broonie@...nel.org>, linux-mtd@...ts.infradead.org,
        linux-renesas-soc@...r.kernel.org, linux-spi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/7] memory: renesas-rpc-if: Pass device instead of
 rpcif to rpcif_*()

Hi Krzysztof,

geert+renesas@...der.be wrote on Mon, 27 Jun 2022 17:31:13 +0200:

> Most rpcif_*() API functions do not need access to any other fields in
> the rpcif structure than the device pointer.  Simplify dependencies by
> passing the device pointer instead.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
>  drivers/memory/renesas-rpc-if.c | 32 ++++++++++++++++----------------
>  drivers/mtd/hyperbus/rpc-if.c   | 18 +++++++++---------

[...]

> diff --git a/drivers/mtd/hyperbus/rpc-if.c b/drivers/mtd/hyperbus/rpc-if.c
> index d00d302434030b20..41734e337ac00e40 100644
> --- a/drivers/mtd/hyperbus/rpc-if.c
> +++ b/drivers/mtd/hyperbus/rpc-if.c
> @@ -56,7 +56,7 @@ static void rpcif_hb_prepare_read(struct rpcif *rpc, void *to,
>  	op.data.nbytes = len;
>  	op.data.buf.in = to;
>  
> -	rpcif_prepare(rpc, &op, NULL, NULL);
> +	rpcif_prepare(rpc->dev, &op, NULL, NULL);
>  }
>  
>  static void rpcif_hb_prepare_write(struct rpcif *rpc, unsigned long to,
> @@ -70,7 +70,7 @@ static void rpcif_hb_prepare_write(struct rpcif *rpc, unsigned long to,
>  	op.data.nbytes = len;
>  	op.data.buf.out = from;
>  
> -	rpcif_prepare(rpc, &op, NULL, NULL);
> +	rpcif_prepare(rpc->dev, &op, NULL, NULL);
>  }
>  
>  static u16 rpcif_hb_read16(struct hyperbus_device *hbdev, unsigned long addr)
> @@ -81,7 +81,7 @@ static u16 rpcif_hb_read16(struct hyperbus_device *hbdev, unsigned long addr)
>  
>  	rpcif_hb_prepare_read(&hyperbus->rpc, &data, addr, 2);
>  
> -	rpcif_manual_xfer(&hyperbus->rpc);
> +	rpcif_manual_xfer(hyperbus->rpc.dev);
>  
>  	return data.x[0];
>  }
> @@ -94,7 +94,7 @@ static void rpcif_hb_write16(struct hyperbus_device *hbdev, unsigned long addr,
>  
>  	rpcif_hb_prepare_write(&hyperbus->rpc, addr, &data, 2);
>  
> -	rpcif_manual_xfer(&hyperbus->rpc);
> +	rpcif_manual_xfer(hyperbus->rpc.dev);
>  }
>  
>  static void rpcif_hb_copy_from(struct hyperbus_device *hbdev, void *to,
> @@ -105,7 +105,7 @@ static void rpcif_hb_copy_from(struct hyperbus_device *hbdev, void *to,
>  
>  	rpcif_hb_prepare_read(&hyperbus->rpc, to, from, len);
>  
> -	rpcif_dirmap_read(&hyperbus->rpc, from, len, to);
> +	rpcif_dirmap_read(hyperbus->rpc.dev, from, len, to);
>  }
>  
>  static const struct hyperbus_ops rpcif_hb_ops = {
> @@ -130,9 +130,9 @@ static int rpcif_hb_probe(struct platform_device *pdev)
>  
>  	platform_set_drvdata(pdev, hyperbus);
>  
> -	rpcif_enable_rpm(&hyperbus->rpc);
> +	rpcif_enable_rpm(hyperbus->rpc.dev);
>  
> -	error = rpcif_hw_init(&hyperbus->rpc, true);
> +	error = rpcif_hw_init(hyperbus->rpc.dev, true);
>  	if (error)
>  		goto out_disable_rpm;
>  
> @@ -150,7 +150,7 @@ static int rpcif_hb_probe(struct platform_device *pdev)
>  	return 0;
>  
>  out_disable_rpm:
> -	rpcif_disable_rpm(&hyperbus->rpc);
> +	rpcif_disable_rpm(hyperbus->rpc.dev);
>  	return error;
>  }

This will only apply on top of mtd/next, because that
rpcif_disable_rpm() balance call was very recently contributed by Geert:
https://lore.kernel.org/linux-mtd/f3070e1af480cb252ae183d479a593dbbf947685.1655457790.git.geert+renesas@glider.be/

So we need to first share an immutable tag on the current mtd/next
branch. Richard, that is my vacation gift for you :)

Otherwise,

Acked-by: Miquel Raynal <miquel.raynal@...tlin.com>

Thanks,
Miquèl