linux-kernel - Re: [PATCH] spi: omap2-mcspi: Fix native cs with new set

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Date:	Wed, 20 May 2015 21:07:09 -0500
From:	Michael Welling <mwelling@...e.org>
To:	Mark Brown <broonie@...nel.org>
Cc:	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-next@...r.kernel.org, linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] spi: omap2-mcspi: Fix native cs with new set_cs

On Tue, May 12, 2015 at 08:17:58PM +0100, Mark Brown wrote:
> On Tue, May 12, 2015 at 12:38:57PM -0500, Michael Welling wrote:
> > GPIO chip select patch series appears to have broken the native chip select
> > support. This patch pulls the manual native chip select toggling out of
> > the transfer_one routine and adds a set_cs routine.
> 
> Applied, thanks

It appears that in haste, this fix for the native cs support broke
the GPIO chip select support that I was originally shooting for.

[    2.653658] mcp23s08 spi1.1: TXS timed out
[    2.657961] mcp23s08 spi1.1: SPI transfer failed: -5
[    2.663305] spi_master spi1: failed to transfer one message from queue
[    2.670172] mcp23s08 spi1.1: can't setup chip 64, --> -5
[    2.675784] GPIO chip mcp23s08: gpiochip_unexport: status -19

My guess is that the set_cs needs to be called even when toggling as GPIO.

How should I handle this?


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