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Groups > linux.kernel > #1494028
| From | Alexandre Belloni <alexandre.belloni@free-electrons.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCHv4 2/3] tty/serial: at91: fix hardware handshake with GPIOs |
| Date | 2016-09-30 13:20 +0200 |
| Message-ID | <sn41c-14H-13@gated-at.bofh.it> (permalink) |
| References | <sn1PN-7WT-13@gated-at.bofh.it> <sn1PN-7WT-19@gated-at.bofh.it> <sn294-8iN-7@gated-at.bofh.it> <sn3Rv-11r-15@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 30/09/2016 at 13:04:28 +0200, Richard Genoud wrote : > Anyway, the problematics setups are all the setups with USMODE_HWHS > enabled on platform without Fifos or PDC, > i.e. all platforms but sama5d2 (Cyrille, correct me if I'm wrong). > This is a wrong assumption, at91rm9200 to at91sam9g45 all have a pdc. Please, don't break those platforms. The only affected platforms are sam9x5, sama5d3 and sama5d4. > For instance, on sam9x5, if DMA is used, USMODE_HWHS enabled and > RTS/CTS NOT muxed as GPIOS, > it's like there was no flow control at all (the CTS pin doesn't > disable the transmitter). > > Since atmel HW guys said that USMODE_HWHS is broken for platforms !sama5d2, > (cfhttps://lkml.org/lkml/2016/9/7/598 ), I honestly didn't dig any > further into that flag. > > > Regards, > Richard -- Alexandre Belloni, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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[PATCHv4 2/3] tty/serial: at91: fix hardware handshake with GPIOs Richard Genoud <richard.genoud@gmail.com> - 2016-09-30 11:00 +0200
Re: [PATCHv4 2/3] tty/serial: at91: fix hardware handshake with GPIOs Uwe Kleine-König <u.kleine-koenig@pengutronix.de> - 2016-09-30 11:20 +0200
Re: [PATCHv4 2/3] tty/serial: at91: fix hardware handshake with GPIOs Richard Genoud <richard.genoud@gmail.com> - 2016-09-30 13:10 +0200
Re: [PATCHv4 2/3] tty/serial: at91: fix hardware handshake with GPIOs Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2016-09-30 13:20 +0200
Re: [PATCHv4 2/3] tty/serial: at91: fix hardware handshake with GPIOs Richard Genoud <richard.genoud@gmail.com> - 2016-09-30 13:50 +0200
Re: [PATCHv4 2/3] tty/serial: at91: fix hardware handshake with GPIOs Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2016-09-30 14:00 +0200
Re: [PATCHv4 2/3] tty/serial: at91: fix hardware handshake with GPIOs Richard Genoud <richard.genoud@gmail.com> - 2016-09-30 14:30 +0200
Re: [PATCHv4 2/3] tty/serial: at91: fix hardware handshake with GPIOs Uwe Kleine-König <u.kleine-koenig@pengutronix.de> - 2016-10-04 09:30 +0200
Re: [PATCHv4 2/3] tty/serial: at91: fix hardware handshake with GPIOs Richard Genoud <richard.genoud@gmail.com> - 2016-10-07 17:30 +0200
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