linux-kernel - Re: [PATCH v3 05/16] mtd: rawnand: qcom: remove dt property nand-ecc-step-size

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Date:   Mon, 28 May 2018 11:25:54 +0530
From:   Abhishek Sahu <absahu@...eaurora.org>
To:     Miquel Raynal <miquel.raynal@...tlin.com>
Cc:     Boris Brezillon <boris.brezillon@...tlin.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mtd@...ts.infradead.org, Andy Gross <andy.gross@...aro.org>,
        Archit Taneja <architt@...eaurora.org>
Subject: Re: [PATCH v3 05/16] mtd: rawnand: qcom: remove dt property
 nand-ecc-step-size

On 2018-05-26 14:12, Miquel Raynal wrote:
> Hi Abhishek,
> 
> On Fri, 25 May 2018 17:51:33 +0530, Abhishek Sahu
> <absahu@...eaurora.org> wrote:
> 
>> QCOM NAND controller supports only one step size (512) so
>> nand-ecc-step-size DT property is redundant. This property
>> can be removed and ecc step size can be assigned with 512 value.
>> 
>> Signed-off-by: Abhishek Sahu <absahu@...eaurora.org>
>> ---
>> * Changes from v2:
>> 
>>  NEW CHANGE
>> 
>>   1. Removed the custom logic and used the helper fuction.
>>  drivers/mtd/nand/raw/qcom_nandc.c | 11 ++---------
>>  1 file changed, 2 insertions(+), 9 deletions(-)
>> 
>> diff --git a/drivers/mtd/nand/raw/qcom_nandc.c 
>> b/drivers/mtd/nand/raw/qcom_nandc.c
>> index b554fb6..b538390 100644
>> --- a/drivers/mtd/nand/raw/qcom_nandc.c
>> +++ b/drivers/mtd/nand/raw/qcom_nandc.c
>> @@ -2325,15 +2325,8 @@ static int qcom_nand_host_setup(struct 
>> qcom_nand_host *host)
>>  	bool wide_bus;
>>  	int ecc_mode = 1;
>> 
>> -	/*
>> -	 * the controller requires each step consists of 512 bytes of data.
>> -	 * bail out if DT has populated a wrong step size.
>> -	 */
>> -	if (ecc->size != NANDC_STEP_SIZE) {
>> -		dev_err(nandc->dev, "invalid ecc size\n");
>> -		return -EINVAL;
>> -	}
>> -
>> +	/* controller only supports 512 bytes of data in each step */
> 
> "512 bytes data steps"
> 

  Thanks Miquel.
  Will update that.

  Regards,
  Abhishek

>> +	ecc->size = NANDC_STEP_SIZE;
>>  	wide_bus = chip->options & NAND_BUSWIDTH_16 ? true : false;
>> 
>>  	if (ecc->strength >= 8) {
> 
> Once corrected:
> 
> Acked-by: Miquel Raynal <miquel.raynal@...tlin.com>