Messages in this thread | | | Date | Wed, 5 Nov 2014 17:39:53 +0100 | From | Johannes Thumshirn <> | Subject | Re: [PATCH v4] tty: serial: men_z135_uart: Fix driver for changes in hardware |
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On Mon, Nov 03, 2014 at 04:26:39PM -0500, Peter Hurley wrote: > On 11/03/2014 04:01 PM, Peter Hurley wrote: > > On 11/03/2014 11:05 AM, Johannes Thumshirn wrote: > >> * Enable the handling of UART core's automatic flow control feature. > >> When AFE is active disable generation of modem status IRQs. > > > > So HUPCL doesn't work when CRTSCTS is set? > > Sorry, I meant !CLOCAL. IOW, > > 'So !CLOCAL doesn't work when CRTSCTS is set?'
Yes, unfortunately
> > > Is this because there's actually a problem with the IP core that > > MSIs trash the autoCTS state, or is the problem that the driver > > just shouldn't be calling uart_handle_cts_change() when autoCTS is > > on? >
From our investigations it looks like it trashes the autoCTS state.
Johannes
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