RE: [PATCH V2 5/5] tty: serial: fsl_lpuart: clear LPUART Status Register in lpuart32_shutdown()

[Sherry Sun]

> -----Original Message-----
> From: Michael Walle <michael@xxxxxxxx>
> Sent: 2022年11月23日 18:36
> To: Sherry Sun <sherry.sun@xxxxxxx>
> Cc: gregkh@xxxxxxxxxxxxxxxxxxx; jirislaby@xxxxxxxxxx;
> jingchang.lu@xxxxxxxxxxxxx; tomonori.sakita@xxxxxxxxxx;
> atsushi.nemoto@xxxxxxxxxx; linux-serial@xxxxxxxxxxxxxxx; linux-
> kernel@xxxxxxxxxxxxxxx; dl-linux-imx <linux-imx@xxxxxxx>
> 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?
> 

Hi Michael, same as what we discussed under another patch, unfortunately the .startup() won’t clear the status of the uart port.

Best Regards
Sherry