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

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Message-ID: <20180526104259.210d96fc@xps13>
Date:   Sat, 26 May 2018 10:42:59 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Abhishek Sahu <absahu@...eaurora.org>
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

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"

> +	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>