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Re: [PATCH] spi: Setup the master controller driver before setting the chipselect

From "Franklin S Cooper Jr." <fcooper@ti.com>
Newsgroups linux.kernel
Subject Re: [PATCH] spi: Setup the master controller driver before setting the chipselect
Date 2015-10-16 16:50 +0200
Message-ID <qkeuu-Sc-15@gated-at.bofh.it> (permalink)
References <qjXN0-1dR-19@gated-at.bofh.it> <qkaqS-3p4-25@gated-at.bofh.it> <qkeb8-uX-5@gated-at.bofh.it> <qkeuu-Sc-17@gated-at.bofh.it>
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On 10/16/2015 09:43 AM, Mark Brown wrote:
> On Fri, Oct 16, 2015 at 09:27:50AM -0500, Franklin S Cooper Jr. wrote:
>
>> Makes sense. How about something like this?
>> SPI controllers may need to be properly setup before chip selects
>> can be used. Therefore, wait until the spi controller has a chance
>> to perform their setup procedure before trying to use the chip
>> select.
> Yes, that's a lot better - there's also the fact that if we assert chip
> select before we've got the pins in a good state we may cause the device
> to see signals that confuse it as we change.
Ok. I'll submit a rev2 with my updated commit message and incorporate
your suggestion also.

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Thread

[PATCH] spi: Setup the master controller driver before setting the chipselect Franklin S Cooper Jr <fcooper@ti.com> - 2015-10-15 23:00 +0200
  Re: [PATCH] spi: Setup the master controller driver before setting  the chipselect Mark Brown <broonie@kernel.org> - 2015-10-16 12:30 +0200
    Re: [PATCH] spi: Setup the master controller driver before setting  the chipselect "Franklin S Cooper Jr." <fcooper@ti.com> - 2015-10-16 16:30 +0200
      Re: [PATCH] spi: Setup the master controller driver before setting  the chipselect "Franklin S Cooper Jr." <fcooper@ti.com> - 2015-10-16 16:50 +0200
      Re: [PATCH] spi: Setup the master controller driver before setting  the chipselect Mark Brown <broonie@kernel.org> - 2015-10-16 16:50 +0200

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