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Re: [PATCHv2] wlcore: spi: add wl18xx support

From Mark Brown <broonie@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCHv2] wlcore: spi: add wl18xx support
Date 2016-04-21 13:20 +0200
Message-ID <rqkOn-8hw-27@gated-at.bofh.it> (permalink)
References (5 earlier) <rpI6n-2bD-29@gated-at.bofh.it> <rpI6n-2bD-27@gated-at.bofh.it> <rpISK-2Sj-23@gated-at.bofh.it> <rpISK-2Sj-21@gated-at.bofh.it> <rqkEG-8dU-21@gated-at.bofh.it>
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On Thu, Apr 21, 2016 at 11:07:37AM +0000, Reizer, Eyal wrote:

> * (i) If the transfer isn't the last one in the message, this flag is
> * used to make the chipselect briefly go inactive in the middle of the
> * message.  Toggling chipselect in this way may be needed to terminate
> * a chip command, letting a single spi_message perform all of group of
> * chip transactions together.

> Now, in my case I need the CS pin to go inactive and stay inactive during the transfer 
> of the next byte for completing the SPI init correctly (sending the extra clock cycles while CS is inactive)
> If I read the above correctly, CS will only briefly go inactive but will when the next byte 
> is sent it will be active again.
> What am I missing?

No, it changes the state.  The main use case is a brief bounce but
you can use it for other things.

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Re: [PATCHv2] wlcore: spi: add wl18xx support Arnd Bergmann <arnd@arndb.de> - 2016-04-18 00:30 +0200
  RE: [PATCHv2] wlcore: spi: add wl18xx support "Reizer, Eyal" <eyalr@ti.com> - 2016-04-18 08:00 +0200
    Re: [PATCHv2] wlcore: spi: add wl18xx support Arnd Bergmann <arnd@arndb.de> - 2016-04-18 17:00 +0200
      RE: [PATCHv2] wlcore: spi: add wl18xx support "Reizer, Eyal" <eyalr@ti.com> - 2016-04-19 11:10 +0200
        Re: [PATCHv2] wlcore: spi: add wl18xx support Arnd Bergmann <arnd@arndb.de> - 2016-04-19 16:30 +0200
          RE: [PATCHv2] wlcore: spi: add wl18xx support "Reizer, Eyal" <eyalr@ti.com> - 2016-04-19 16:40 +0200
        Re: [PATCHv2] wlcore: spi: add wl18xx support Mark Brown <broonie@kernel.org> - 2016-04-19 19:20 +0200
          Re: [PATCHv2] wlcore: spi: add wl18xx support Mark Brown <broonie@kernel.org> - 2016-04-19 19:30 +0200
            Re: [PATCHv2] wlcore: spi: add wl18xx support Mark Brown <broonie@kernel.org> - 2016-04-19 20:00 +0200
              Re: [PATCHv2] wlcore: spi: add wl18xx support Mark Brown <broonie@kernel.org> - 2016-04-19 20:50 +0200
                RE: [PATCHv2] wlcore: spi: add wl18xx support "Reizer, Eyal" <eyalr@ti.com> - 2016-04-21 13:10 +0200
                Re: [PATCHv2] wlcore: spi: add wl18xx support Mark Brown <broonie@kernel.org> - 2016-04-21 13:20 +0200
    Re: [PATCHv2] wlcore: spi: add wl18xx support Mark Brown <broonie@kernel.org> - 2016-04-19 19:10 +0200

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