RE: Re: [PATCH v3 2/2] serial: 8250_dw: add Ambarella CV75 quirks

[Long Zhao]

Hi Linus,

Thanks for the review and for steering us to 8250_dw. I'll also look
into the Sashiko comment on the lockless UART_IER write.

Best regards!
Long Zhao

Ambarella Shanghai Co., Ltd
-----Original Message-----
From: Linus Walleij <linusw@xxxxxxxxxx> 
Sent: Friday, August 14, 2026 15:00
To: Long Zhao <longzhao@xxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>; Jiri Slaby <jirislaby@xxxxxxxxxx>; Rob Herring <robh@xxxxxxxxxx>; Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>; Conor Dooley <conor+dt@xxxxxxxxxx>; Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>; Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; linux-serial@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx
Subject: [EXT] Re: [PATCH v3 2/2] serial: 8250_dw: add Ambarella CV75 quirks

On Thu, Aug 13, 2026 at 12:35 PM Long Zhao via B4 Relay <devnull+longzhao.ambarella.com@xxxxxxxxxx> wrote:

> From: Long Zhao <longzhao@xxxxxxxxxxxxx>
>
> Add CV75 platform data with an ETOI IER mask and skip-set-rate so the 
> DesignWare 8250 driver can drive the Ambarella UART for console use.
>
> Signed-off-by: Long Zhao <longzhao@xxxxxxxxxxxxx>

I see this approach was successful! :)
Look into the Sashiko comment abour lockless write to UART_IER but from my PoV this is fine:
Reviewed-by: Linus Walleij <linusw@xxxxxxxxxx>

Yours,
Linus Walleij

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