linux-kernel - Re: [PATCH V2 5/5] tty: serial: fsl_lpuart: clear LPUART Status Register in lpuart32

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Message-ID: <9c4a8eb97e6566c8a704d69b176d889b@walle.cc>
Date:   Wed, 23 Nov 2022 11:36:22 +0100
From:   Michael Walle <michael@...le.cc>
To:     Sherry Sun <sherry.sun@....com>
Cc:     gregkh@...uxfoundation.org, jirislaby@...nel.org,
        jingchang.lu@...escale.com, tomonori.sakita@...d.co.jp,
        atsushi.nemoto@...d.co.jp, linux-serial@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-imx@....com
Subject: Re: [PATCH V2 5/5] tty: serial: fsl_lpuart: clear LPUART Status
 Register in lpuart32_shutdown()

Am 2022-11-10 09:17, schrieb Sherry Sun:
> The LPUART Status Register needs to be cleared when closing the uart
> port to get a clean environment when reopening the uart.

Shouldn't it be cleared on startup instead? What if there was some
kind of event between shutdown and startup?

-michael