linux-kernel - Re: [PATCH 2/5] mtd: nand: gpmi: add i.MX 7 SoC support

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Message-ID: <af3fe671-c5fb-d3cf-c891-e6b7c973baa1@gmail.com>
Date:   Fri, 21 Apr 2017 04:03:09 +0200
From:   Marek Vasut <marek.vasut@...il.com>
To:     Stefan Agner <stefan@...er.ch>, dwmw2@...radead.org,
        computersforpeace@...il.com, boris.brezillon@...e-electrons.com,
        richard@....at, cyrille.pitchen@...el.com
Cc:     robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        kernel@...gutronix.de, han.xu@....com, fabio.estevam@...escale.com,
        LW@...O-electronics.de, linux-mtd@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] mtd: nand: gpmi: add i.MX 7 SoC support

On 04/21/2017 03:07 AM, Stefan Agner wrote:
> Add support for i.MX 7 SoC. The i.MX 7 has a slightly different
> clock architecture requiring only two clocks to be referenced.
> The IP is slightly different compared to i.MX 6SoloX, but currently
> none of this differences are in use so there is no detection needed
> and the driver can reuse IS_MX6SX.
> 
> Signed-off-by: Stefan Agner <stefan@...er.ch>
> ---
>  drivers/mtd/nand/gpmi-nand/gpmi-nand.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> index c8bbf5da2ab8..4a45d37ddc80 100644
> --- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> @@ -127,6 +127,18 @@ static const struct gpmi_devdata gpmi_devdata_imx6sx = {
>  	.clks_count = ARRAY_SIZE(gpmi_clks_for_mx6),
>  };
>  
> +static const char * const gpmi_clks_for_mx7d[] = {
> +	"gpmi_io", "gpmi_bch_apb",
> +};
> +
> +static const struct gpmi_devdata gpmi_devdata_imx7d = {
> +	.type = IS_MX6SX,

Would it make sense to use IS_MX7 here already to prevent future surprises ?

> +	.bch_max_ecc_strength = 62,
> +	.max_chain_delay = 12,
> +	.clks = gpmi_clks_for_mx7d,
> +	.clks_count = ARRAY_SIZE(gpmi_clks_for_mx7d),
> +};
> +
>  static irqreturn_t bch_irq(int irq, void *cookie)
>  {
>  	struct gpmi_nand_data *this = cookie;
> @@ -2071,6 +2083,9 @@ static const struct of_device_id gpmi_nand_id_table[] = {
>  	}, {
>  		.compatible = "fsl,imx6sx-gpmi-nand",
>  		.data = &gpmi_devdata_imx6sx,
> +	}, {
> +		.compatible = "fsl,imx7d-gpmi-nand",
> +		.data = &gpmi_devdata_imx7d,
>  	}, {}
>  };
>  MODULE_DEVICE_TABLE(of, gpmi_nand_id_table);
> 


-- 
Best regards,
Marek Vasut