On Sat, Sep 14, 2013 at 12:13:03PM +0200, Frank Schäfer wrote:
> According to Prolific, several (unauthorized) cheap and less functional
> clones of the PL2303HX chip are in circulation. [1]
No footnote showed up in this changelog comment, care to fix this up?
And really, cloned chips for such a cheap device? Ugh.
> I've had the chance to test such a cloned device and it turned out that
> it doesn't support any baud rates above 115200 baud (original: 6 Mbaud)
> It also doesn't support the divisior based baud rate encoding method,
> so no continuous baud rate adjustment is possible.
> Nevertheless, these devices have been working (unintentionally) with
> the driver up to commit 61fa8d694b ("pl2303: also use the divisor based
> baud rate encoding method for baud rates < 115200 with HX chips"), and
> this commit broke support for them.
> Fortunately, it is pretty simple to distinguish between the original
> and the cloned HX chips, so I've added a check and an extra chip type
> to keep the clones working.
> The same check is used by the latest Prolific Windows driver, so it
> should be solid.
Patch looks reasonable, but can you add the link you refer to above
somewhere?
thanks,
greg k-h
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