linux-kernel - Re: [PATCH 3/3] mtd: s3c2410: parse the device configuration from OF node

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Date:   Wed, 12 Oct 2016 11:01:05 +0200
From:   Boris Brezillon <boris.brezillon@...e-electrons.com>
To:     Sergio Prado <sergio.prado@...abworks.com>
Cc:     linux@...linux.org.uk, linux@...tec.co.uk, robh+dt@...nel.org,
        mark.rutland@....com, devicetree@...r.kernel.org, kgene@...nel.org,
        krzk@...nel.org, javier@....samsung.com, richard@....at,
        dwmw2@...radead.org, computersforpeace@...il.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] mtd: s3c2410: parse the device configuration from
 OF node

Hi Sergio,

On Wed,  5 Oct 2016 20:46:57 -0300
Sergio Prado <sergio.prado@...abworks.com> wrote:

> Allows configuring Samsung's s3c2410 memory controller using a
> devicetree.
> 
> Signed-off-by: Sergio Prado <sergio.prado@...abworks.com>
> ---
>  drivers/mtd/nand/s3c2410.c                     | 171 ++++++++++++++++++++++---
>  include/linux/platform_data/mtd-nand-s3c2410.h |   1 +
>  2 files changed, 156 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
> index 174ac9dc4265..352cf2656bc8 100644
> --- a/drivers/mtd/nand/s3c2410.c
> +++ b/drivers/mtd/nand/s3c2410.c

[...]

> +
> +static int s3c2410_nand_init_timings(struct s3c2410_nand_info *info,
> +				     struct nand_chip *chip)
> +{
> +	struct s3c2410_platform_nand *pdata = info->platform;
> +	const struct nand_sdr_timings *t;
> +	int tacls, mode;
> +
> +	mode = onfi_get_async_timing_mode(chip);
> +	if (mode == ONFI_TIMING_MODE_UNKNOWN)
> +		mode = chip->onfi_timing_mode_default;
> +
> +	t = onfi_async_timing_mode_to_sdr_timings(mode);
> +	if (IS_ERR(t))
> +		return PTR_ERR(t);

We recently introduced an method to automate timing selection and
configuration [1]. Can you switch to this approach (the changes are in
the nand/next branch [2] and should appear in 4.9-rc1)?

Thanks,

Boris

[1]https://www.spinics.net/lists/arm-kernel/msg532007.html 
[2]https://github.com/linux-nand/linux/tree/nand/next