linux-kernel - Re: Patch for drivers/usb/serial/ch341.c enabling parity

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Date:   Sun, 2 Apr 2017 21:14:04 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Leif Neland <leif@...and.dk>
Cc:     Johan Hovold <johan@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        USB list <linux-usb@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Patch for drivers/usb/serial/ch341.c enabling parity

On Sun, Apr 2, 2017 at 3:00 PM, Leif Neland <leif@...and.dk> wrote:
> There is a patch
>
> https://github.com/karlp/ch341-linux/blob/master/0001-usb-serial-ch341-Add-parity-support.patch
>
> which enables parity selection for the ch341 USB-RS485 adapter.
>
> From: Karl Palsson <karlp@...ak.net.au>
> Date: Tue, 18 Mar 2014 23:33:27 +0000
>
> This adapter is available for cheap on eBay.
>
> The patch made me able to use this adapter for polling my modbus
> power-meter with raspberry pi.
>
> Would it be possible to get this into the official distribution?

Kernel 4.10 has commit ba781bdf866 ("USB: serial: ch341: add support
for parity, frame length, stop bits") that adds parity support for
this driver.

Have you tried using 4.10.x?