After a bit more research - This is what I know:
The upstream cp210x driver is not completely up-to-date with the driver silabs
maintains on
their site. In their own words: "... unfortunately GPIO is not something that
has been
committed to the Linux kernel yet for community maintenance. We leave the
drivers on our
website, even though they are a bit behind the curve of the maintained kernels,
to
demonstrate how to do this quickly using an ioctl() call."
I also noted that the patch I submitted is not up-to-date with their latest
devices which are
supported in their driver - whoops.
I could try to submit this upstream even if it was snatched from their driver.
Is this OK?
There is a small relay controller package (crelay) that I am going to submit to
the packages
repo it this patch gets accepted. It uses the cp210x ioctl interface.
I will also submit this patch again here with the correct format and all the
latest fixes from
the old Silicon Labs driver.
/ted
-----Original Message-----
From: Felix Fietkau
Sent: Monday, August 03, 2015 2:33 PM
To: Ted Hess ; OpenWrt developers
Subject: Re: [OpenWrt-Devel] [PATCH] [kernel] cp201x: Add GPIO ioctl commands
(from Silicon Labs)
On 2015-08-03 20:17, Ted Hess wrote:
It would probably make sense to do it that way however, there are apps which already use the ioctl interface on this device and
this
code came directly from the the manufacturer's linux driver.
I'm not sure how to add general GPIO support for a specific USB device? Things
to research...
Did the manufacturer submit this upstream already, or is somebody else
(maybe you) going to do so?
- Felix
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