linux-kernel - Re: [PATCH v3 0/4] ARM: dts: at91: Set sst26vf064b SPI NOR flash at its maxumum frequency

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Message-ID: <b286776b-f50d-e545-6b21-6dc3d90e6c90@linaro.org>
Date:   Fri, 31 Mar 2023 10:57:01 +0100
From:   Tudor Ambarus <tudor.ambarus@...aro.org>
To:     Nicolas Ferre <nicolas.ferre@...rochip.com>,
        claudiu.beznea@...rochip.com
Cc:     alexandre.belloni@...tlin.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/4] ARM: dts: at91: Set sst26vf064b SPI NOR flash at
 its maxumum frequency



On 3/30/23 19:53, Nicolas Ferre wrote:
> On 28/03/2023 at 12:15, Tudor Ambarus wrote:
>> Changes in v3: Update S-o-b tag to match author's email.
>> Changes in v2: update value of spi-cs-setup-ns as it was changed to u32
>> since the first proposal.
>> v1 at:
>> https://lore.kernel.org/linux-mtd/20221117105249.115649-1-tudor.ambarus@microchip.com/
>>
>> ---
>> SPI NOR flashes have specific cs-setup time requirements without which
>> they can't work at frequencies close to their maximum supported
>> frequency,
>> as they miss the first bits of the instruction command. Unrecognized
>> commands are ignored, thus the flash will be unresponsive. Introduce the
>> spi-cs-setup-ns property to allow spi devices to specify their cs setup
>> time.
> 
> Now that it's tested:
> Acked-by: Nicolas Ferre <nicolas.ferre@...rochip.com>
> to the whole series and I'll queue them on at91-dt branch and changed
> your email address when doing so.
> 
> Thanks for your patches Tudor, it's appreciated! Best regards,

My pleasure, I'm happy I could help. Cheers,
ta