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: <3fc2611e-3cd8-d9ae-5ff4-d33fda8c0099@microchip.com>
Date:   Thu, 30 Mar 2023 20:53:46 +0200
From:   Nicolas Ferre <nicolas.ferre@...rochip.com>
To:     Tudor Ambarus <tudor.ambarus@...aro.org>,
        <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 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,
   Nicolas

> Tudor Ambarus (4):
>    ARM: dts: at91-sama5d27_wlsom1: Set sst26vf064b SPI NOR flash at its
>      maximum frequency
>    ARM: dts: at91-sama5d27_som1: Set sst26vf064b SPI NOR flash at its
>      maximum frequency
>    ARM: dts: at91: sama5d2_icp: Set sst26vf064b SPI NOR flash at its
>      maximum frequency
>    ARM: dts: at91: sam9x60ek: Set sst26vf064b SPI NOR flash at its
>      maximum frequency
> 
>   arch/arm/boot/dts/at91-sam9x60ek.dts        | 3 ++-
>   arch/arm/boot/dts/at91-sama5d27_som1.dtsi   | 3 ++-
>   arch/arm/boot/dts/at91-sama5d27_wlsom1.dtsi | 3 ++-
>   arch/arm/boot/dts/at91-sama5d2_icp.dts      | 3 ++-
>   4 files changed, 8 insertions(+), 4 deletions(-)
> 
> --
> 2.40.0.348.gf938b09366-goog
> 

-- 
Nicolas Ferre