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

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Message-ID: <52B04140.1060709@ti.com>
Date:	Tue, 17 Dec 2013 14:19:12 +0200
From:	"ivan.khoronzhuk" <ivan.khoronzhuk@...com>
To:	Brian Norris <computersforpeace@...il.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 12/17/2013 10:50 AM, Brian Norris wrote:
> 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.
> 

Yes, I will do nothing for that

>> +		    !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().
> 

It seems for bus width I can replace it on:

prop = of_get_nand_bus_width(pdev->dev.of_node);
if ( 0 < prop || !of_property_read_u32(pdev->dev.of_node,
	     "ti,davinci-nand-buswidth", &prop))
     if (prop == 16)
	     pdata->options |= NAND_BUSWIDTH_16;


>> +		    !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
> 


-- 
Regards,
Ivan Khoronzhuk
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