linux-kernel - Re: [PATCH v13 15/15] mtd: spi-nor: micron-st: allow using MT35XU512ABA in Octal DTR mode

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Message-ID: <62ad761a-3fcf-07c2-0b3d-0a27d877dcde@microchip.com>
Date:   Wed, 30 Sep 2020 09:12:17 +0000
From:   <Tudor.Ambarus@...rochip.com>
To:     <p.yadav@...com>, <miquel.raynal@...tlin.com>, <richard@....at>,
        <vigneshr@...com>, <linux-mtd@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <nsekhar@...com>, <boris.brezillon@...labora.com>
Subject: Re: [PATCH v13 15/15] mtd: spi-nor: micron-st: allow using
 MT35XU512ABA in Octal DTR mode

On 9/16/20 3:44 PM, Pratyush Yadav wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> Since this flash doesn't have a Profile 1.0 table, the Octal DTR
> capabilities are enabled in the post SFDP fixup, along with the 8D-8D-8D
> fast read settings.
> 
> Enable Octal DTR mode with 20 dummy cycles to allow running at the
> maximum supported frequency of 200Mhz.
> 
> The flash supports the soft reset sequence. So, add the flag in the
> flash's info.
> 
> Signed-off-by: Pratyush Yadav <p.yadav@...com>
> ---
>  drivers/mtd/spi-nor/micron-st.c | 102 +++++++++++++++++++++++++++++++-
>  1 file changed, 101 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/spi-nor/micron-st.c b/drivers/mtd/spi-nor/micron-st.c
> index ef3695080710..cc02c1418d1d 100644
> --- a/drivers/mtd/spi-nor/micron-st.c
> +++ b/drivers/mtd/spi-nor/micron-st.c
> @@ -8,10 +8,110 @@

similar comments to those in 14/15 apply here as well.
Looks good. I couldn't find datasheets for neither of flashes though.

Cheers,
ta