From: info@lategoodbye•de (Stefan Wahren)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 4/4] spi: bcm2835aux: fix CPOL/CPHA setting
Date: Tue, 9 Feb 2016 21:21:15 +0100 [thread overview]
Message-ID: <56BA4A3B.3090605@lategoodbye.de> (raw)
In-Reply-To: <1455041435-8015-5-git-send-email-stephanolbrich@gmx.de>
Hi Stephan,
Am 09.02.2016 um 19:10 schrieb stephanolbrich at gmx.de:
> From: Stephan Olbrich <stephanolbrich@gmx•de>
>
> The auxiliary spi supports only CPHA=0 modes as the first bit is
> always output to the pin before the first clock cycle. In CPHA=1
> modes the first clock edge outputs the second bit hence the slave
> can never read the first bit.
in case auxiliary spi isn't able to handle all modes shouldn't we report
this to the upper layers?
Regards
next prev parent reply other threads:[~2016-02-09 20:21 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-09 18:10 [PATCH 0/4] spi: bcm2835aux: auxiliary spi improvements stephanolbrich at gmx.de
2016-02-09 18:10 ` [PATCH 1/4] spi: bcm2835aux: fix bitmask defines stephanolbrich at gmx.de
2016-02-09 19:54 ` Stefan Wahren
2016-02-10 20:08 ` Stephan Olbrich
2016-02-09 23:44 ` Eric Anholt
2016-02-09 18:10 ` [PATCH 2/4] spi: bcm2835aux: disable tx fifo empty irq stephanolbrich at gmx.de
2016-02-09 23:45 ` Eric Anholt
2016-02-09 18:10 ` [PATCH 3/4] spi: bcm2835aux: set up spi-mode before asserting cs-gpio stephanolbrich at gmx.de
2016-02-09 23:49 ` Eric Anholt
2016-02-10 8:01 ` Mark Brown
2016-02-10 18:59 ` Eric Anholt
2016-02-10 19:02 ` Mark Brown
2016-02-10 20:26 ` Stephan Olbrich
2016-02-10 23:19 ` Martin Sperl
2016-02-11 12:27 ` Mark Brown
2016-02-11 18:06 ` Martin Sperl
2016-02-09 18:10 ` [PATCH 4/4] spi: bcm2835aux: fix CPOL/CPHA setting stephanolbrich at gmx.de
2016-02-09 20:21 ` Stefan Wahren [this message]
2016-02-10 0:13 ` Eric Anholt
2016-02-10 20:45 ` Stephan Olbrich
2016-02-10 21:24 ` Eric Anholt
2016-02-11 15:25 ` Martin Sperl
2016-02-11 16:05 ` Stephan Olbrich
2016-02-11 16:19 ` Martin Sperl
2016-02-11 18:44 ` Martin Sperl
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