linux-kernel - Re: [PATCH 2/2] spi: bcm-mspi: Add support for Broadcom MSPI driver.

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Date:	Thu, 14 May 2015 14:43:14 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	Mark Brown <broonie@...nel.org>,
	Jonathan Richardson <jonathar@...adcom.com>
CC:	Scott Branden <sbranden@...adcom.com>,
	Dmitry Torokhov <dtor@...gle.com>,
	Anatol Pomazau <anatol@...gle.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
	bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 2/2] spi: bcm-mspi: Add support for Broadcom MSPI driver.

On 14/05/15 13:12, Mark Brown wrote:
> On Thu, May 14, 2015 at 12:55:32PM -0700, Jonathan Richardson wrote:
>> On 15-05-14 12:08 PM, Mark Brown wrote:
> 
>>> All it takes is one hardware engineer who sees a SPI controller and a
>>> GPIO they can use for chip select; I wouldn't be so sure that nobody
>>> ever fixed this up locally (or happened to use a device that only needed
>>> single duplex).
> 
>> Hi Mark. Would it help if we just set the flags to half duplex using
>> SPI_MASTER_HALF_DUPLEX when we register the master?
> 
> That would deal with the data corruption issues, yes.  Though it seems
> like there are some people who want full duplex support here - I don't
> know if any of them can point you at suitable hardware to test?

I am fine with having the driver supporting only half-duplex for now,
considering that Jonathan and Scott have no peripheral to test
full-duplex with.

Getting you platforms and test setups could take more time than needed
so, let's proceed with the shortest path.
-- 
Florian
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