From: Alex Henrie <alexh@vpitech.com>
To: Johan Hovold <johan@kernel.org>
Cc: Russell King <linux@armlinux.org.uk>,
linux-usb@vger.kernel.org, alexhenrie24@gmail.com,
Sergey Shtylyov <s.shtylyov@omp.ru>
Subject: Re: [PATCH] USB: serial: cp210x: map B0 to B9600
Date: Tue, 29 Nov 2022 10:48:02 -0700 [thread overview]
Message-ID: <4443793.LvFx2qVVIh@demeter> (raw)
In-Reply-To: <Y4YT7D6AoD31UdOC@hovoldconsulting.com>
On Tuesday, November 29, 2022 7:15:08 AM MST Johan Hovold wrote:
> Also note that the FTDI driver does in fact leave the line speed
> unchanged when B0 is requested (that zero-baud check in
> get_ftdi_divisor() is only used for ASYNC_SPD_CUST).
I tested it empirically today, and you're right, the FTDI driver simply does
not change the baud rate. Thank you for correcting my misunderstanding.
> Your application really should not depend on any particular hardware
> setting after requesting B0.
Understood.
> That said, I've implemented support for B0 in cp210x which leaves the
> current settings unchanged (and which incidentally allows you to
> use the buggy tool).
Excellent! Many thanks!
-Alex
next prev parent reply other threads:[~2022-11-29 17:48 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-26 3:58 [PATCH] USB: serial: cp210x: map B0 to B9600 Alex Henrie
2022-11-26 7:10 ` Greg KH
2022-11-28 18:06 ` Alex Henrie
2022-11-26 10:34 ` Sergey Shtylyov
2022-11-28 14:41 ` Johan Hovold
2022-11-28 18:08 ` Alex Henrie
2022-11-28 18:20 ` Russell King (Oracle)
2022-11-28 18:38 ` Alex Henrie
2022-11-29 14:15 ` Johan Hovold
2022-11-29 17:48 ` Alex Henrie [this message]
2022-11-28 18:12 ` [PATCH v2] " Alex Henrie
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