From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mail.bootlin.com ([62.4.15.54])
 by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux))
 id 1ffWdJ-0005O0-0X
 for linux-mtd@lists.infradead.org; Tue, 17 Jul 2018 20:31:42 +0000
Date: Tue, 17 Jul 2018 22:31:29 +0200
From: Boris Brezillon <boris.brezillon@bootlin.com>
To: Janusz Krzysztofik <jmkrzyszt@gmail.com>, Tony Lindgren <tony@atomide.com>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>, Richard Weinberger
 <richard@nod.at>, David Woodhouse <dwmw2@infradead.org>, Brian Norris
 <computersforpeace@gmail.com>, Marek Vasut <marek.vasut@gmail.com>,
 Masahiro Yamada <yamada.masahiro@socionext.com>, Krzysztof Kozlowski
 <krzk@kernel.org>, Shawn Guo <shawnguo@kernel.org>, Shreeya Patel
 <shreeya.patel23498@gmail.com>, Arvind Yadav <arvind.yadav.cs@gmail.com>,
 linux-mtd@lists.infradead.org, linux-omap@vger.kernel.org,
 linux-kernel@vger.kernel.org, Andy Shevchenko <andy.shevchenko@gmail.com>
Subject: Re: [PATCH RESEND v3] mtd: rawnand: ams-delta: use GPIO lookup table
Message-ID: <20180717223129.5e999c50@bbrezillon>
In-Reply-To: <20180717170552.17735-1-jmkrzyszt@gmail.com>
References: <20180709193850.20191-1-jmkrzyszt@gmail.com>
 <20180717170552.17735-1-jmkrzyszt@gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
List-Id: Linux MTD discussion mailing list <linux-mtd.lists.infradead.org>
List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-mtd>,
 <mailto:linux-mtd-request@lists.infradead.org?subject=unsubscribe>
List-Archive: <http://lists.infradead.org/pipermail/linux-mtd/>
List-Post: <mailto:linux-mtd@lists.infradead.org>
List-Help: <mailto:linux-mtd-request@lists.infradead.org?subject=help>
List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-mtd>,
 <mailto:linux-mtd-request@lists.infradead.org?subject=subscribe>

+Tony

On Tue, 17 Jul 2018 19:05:52 +0200
Janusz Krzysztofik <jmkrzyszt@gmail.com> wrote:

> Now as Amstrad Delta board - the only user of this driver - provides
> GPIO lookup tables, switch from GPIO numbers to GPIO descriptors and
> use the table to locate required GPIO pins.
> 
> Declare static variables for storing GPIO descriptors and replace
> gpio_ function calls with their gpiod_ equivalents.
> 
> Pin naming used by the driver should be followed while respective GPIO
> lookup table is initialized by a board init code.
> 
> Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>

Acked-by: Boris Brezillon <boris.brezillon@bootlin.com>

Just a minor comment below (nothing important, just a coding style
preference).

Also, if it goes through the omap tree (I guess it will target 4.20),
I'll need an immutable tag, because I have changes touching this driver
in the pipe (that's more a request for Tony).


> @@ -230,9 +205,42 @@ static int ams_delta_init(struct platform_device *pdev)
>  	platform_set_drvdata(pdev, io_base);
>  
>  	/* Set chip enabled, but  */
> -	err = gpio_request_array(_mandatory_gpio, ARRAY_SIZE(_mandatory_gpio));
> -	if (err)
> -		goto out_gpio;
> +	gpiod_nwp = devm_gpiod_get(&pdev->dev, "nwp", GPIOD_OUT_HIGH);
> +	if (IS_ERR(gpiod_nwp)) {
> +		err = PTR_ERR(gpiod_nwp);
> +		dev_err(&pdev->dev, "NWP GPIO request failed (%d)\n", err);
> +		goto out_mtd;
> +	}

Can you add a blank line after each if (IS_ERR(gpiod_nwp)) { } block.

> +	gpiod_nce = devm_gpiod_get(&pdev->dev, "nce", GPIOD_OUT_HIGH);
> +	if (IS_ERR(gpiod_nce)) {
> +		err = PTR_ERR(gpiod_nce);
> +		dev_err(&pdev->dev, "NCE GPIO request failed (%d)\n", err);
> +		goto out_mtd;
> +	}
> +	gpiod_nre = devm_gpiod_get(&pdev->dev, "nre", GPIOD_OUT_HIGH);
> +	if (IS_ERR(gpiod_nre)) {
> +		err = PTR_ERR(gpiod_nre);
> +		dev_err(&pdev->dev, "NRE GPIO request failed (%d)\n", err);
> +		goto out_mtd;
> +	}
> +	gpiod_nwe = devm_gpiod_get(&pdev->dev, "nwe", GPIOD_OUT_HIGH);
> +	if (IS_ERR(gpiod_nwe)) {
> +		err = PTR_ERR(gpiod_nwe);
> +		dev_err(&pdev->dev, "NWE GPIO request failed (%d)\n", err);
> +		goto out_mtd;
> +	}
> +	gpiod_ale = devm_gpiod_get(&pdev->dev, "ale", GPIOD_OUT_LOW);
> +	if (IS_ERR(gpiod_ale)) {
> +		err = PTR_ERR(gpiod_ale);
> +		dev_err(&pdev->dev, "ALE GPIO request failed (%d)\n", err);
> +		goto out_mtd;
> +	}
> +	gpiod_cle = devm_gpiod_get(&pdev->dev, "cle", GPIOD_OUT_LOW);
> +	if (IS_ERR(gpiod_cle)) {
> +		err = PTR_ERR(gpiod_cle);
> +		dev_err(&pdev->dev, "CLE GPIO request failed (%d)\n", err);
> +		goto out_mtd;
> +	}
>  
>  	/* Scan to find existence of the device */
>  	err = nand_scan(ams_delta_mtd, 1);