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From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: "Reizer, Eyal" <eyalr-l0cyMroinI0@public.gmane.org>
Cc: "kvalo-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org"
	<kvalo-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
	"���� �����" <eyalreizer-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	"linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	"netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	"devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	"linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCHv2] wlcore: spi: add wl18xx support
Date: Thu, 21 Apr 2016 12:11:49 +0100	[thread overview]
Message-ID: <20160421111149.GO3217@sirena.org.uk> (raw)
In-Reply-To: <8665E2433BC68541A24DFFCA87B70F5B360C2E14-1tpBd5JUCm6IQmiDNMet8wC/G2K4zDHf@public.gmane.org>

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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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  parent reply	other threads:[~2016-04-21 11:11 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1460273570-12298-1-git-send-email-eyalr@ti.com>
     [not found] ` <8665E2433BC68541A24DFFCA87B70F5B360B6C90@DFRE01.ent.ti.com>
2016-04-17 22:19   ` [PATCHv2] wlcore: spi: add wl18xx support Arnd Bergmann
2016-04-18  5:55     ` Reizer, Eyal
2016-04-18 14:57       ` Arnd Bergmann
2016-04-19  9:05         ` Reizer, Eyal
2016-04-19 14:21           ` Arnd Bergmann
2016-04-19 14:35             ` Reizer, Eyal
     [not found]           ` <8665E2433BC68541A24DFFCA87B70F5B360C0745-1tpBd5JUCm6IQmiDNMet8wC/G2K4zDHf@public.gmane.org>
2016-04-19 17:12             ` Mark Brown
     [not found]               ` <sjdvun1fuj4nyi0bgf268g53.1461086401627@email.android.com>
     [not found]                 ` <sjdvun1fuj4nyi0bgf268g53.1461086401627-2ueSQiBKiTY7tOexoI0I+QC/G2K4zDHf@public.gmane.org>
2016-04-19 17:27                   ` Mark Brown
     [not found]                     ` <oe8hqfknrcljrjawnrxlohvr.1461087275186@email.android.com>
     [not found]                       ` <oe8hqfknrcljrjawnrxlohvr.1461087275186-2ueSQiBKiTY7tOexoI0I+QC/G2K4zDHf@public.gmane.org>
2016-04-19 17:54                         ` Mark Brown
     [not found]                           ` <us0dopt1inbrt0x47njgc2vy.1461089085965@email.android.com>
     [not found]                             ` <us0dopt1inbrt0x47njgc2vy.1461089085965-2ueSQiBKiTY7tOexoI0I+QC/G2K4zDHf@public.gmane.org>
2016-04-19 18:46                               ` Mark Brown
     [not found]                                 ` <20160419184627.GG3217-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2016-04-21 11:07                                   ` Reizer, Eyal
     [not found]                                     ` <8665E2433BC68541A24DFFCA87B70F5B360C2E14-1tpBd5JUCm6IQmiDNMet8wC/G2K4zDHf@public.gmane.org>
2016-04-21 11:11                                       ` Mark Brown [this message]
     [not found]       ` <8665E2433BC68541A24DFFCA87B70F5B360BF614-1tpBd5JUCm6IQmiDNMet8wC/G2K4zDHf@public.gmane.org>
2016-04-19 17:07         ` Mark Brown

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