linux-kernel - Re: [PATCH v3 7/9] mtd: nand: davinci: adjust DT properties to MTD generic

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Date:	Tue, 17 Dec 2013 00:50:27 -0800
From:	Brian Norris <computersforpeace@...il.com>
To:	Ivan Khoronzhuk <ivan.khoronzhuk@...com>
Cc:	Santosh Shilimkar <santosh.shilimkar@...com>,
	Rob Landley <rob@...dley.net>,
	Russell King <linux@....linux.org.uk>,
	devicetree@...r.kernel.org, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Rob Herring <rob.herring@...xeda.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Kumar Gala <galak@...nel.crashing.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-mtd@...ts.infradead.org, grygorii.strashko@...com,
	dwmw2@...radead.org
Subject: Re: [PATCH v3 7/9] mtd: nand: davinci: adjust DT properties to MTD
 generic

On Thu, Dec 05, 2013 at 07:25:55PM +0200, Ivan Khoronzhuk wrote:
> --- a/drivers/mtd/nand/davinci_nand.c
> +++ b/drivers/mtd/nand/davinci_nand.c
> @@ -558,6 +557,8 @@ static struct davinci_nand_pdata
>  			"ti,davinci-mask-chipsel", &prop))
>  			pdata->mask_chipsel = prop;
>  		if (!of_property_read_string(pdev->dev.of_node,
> +			"nand-ecc-mode", &mode) ||

Is it possible to use the of_get_nand_ecc_mode() helper? It's
unfortunate that davinci_nand had to use custom bindings in the first
place, making this more difficult... So I can take this patch as-is.

> +		    !of_property_read_string(pdev->dev.of_node,
>  			"ti,davinci-ecc-mode", &mode)) {
>  			if (!strncmp("none", mode, 4))
>  				pdata->ecc_mode = NAND_ECC_NONE;
> @@ -570,11 +571,15 @@ static struct davinci_nand_pdata
>  			"ti,davinci-ecc-bits", &prop))
>  			pdata->ecc_bits = prop;
>  		if (!of_property_read_u32(pdev->dev.of_node,
> +			"nand-bus-width", &prop) ||

Similar story here, with of_get_nand_bus_width().

> +		    !of_property_read_u32(pdev->dev.of_node,
>  			"ti,davinci-nand-buswidth", &prop))
>  			if (prop == 16)
>  				pdata->options |= NAND_BUSWIDTH_16;
> -		if (of_find_property(pdev->dev.of_node,
> -			"ti,davinci-nand-use-bbt", &len))
> +		if (of_property_read_bool(pdev->dev.of_node,
> +			"nand-on-flash-bbt") ||
> +		    of_property_read_bool(pdev->dev.of_node,
> +			"ti,davinci-nand-use-bbt"))
>  			pdata->bbt_options = NAND_BBT_USE_FLASH;
>  	}
>  

Brian
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