linux-kernel - RE: [PATCH 00/11] Convert GPIO Davinci to platform driver

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Date:	Mon, 10 Jun 2013 09:02:23 +0000
From:	"Philip, Avinash" <avinashphilip@...com>
To:	"Nori, Sekhar" <nsekhar@...com>
CC:	"khilman@...prootsystems.com" <khilman@...prootsystems.com>,
	"linux@....linux.org.uk" <linux@....linux.org.uk>,
	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"linus.walleij@...aro.org" <linus.walleij@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"davinci-linux-open-source@...ux.davincidsp.com" 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 00/11] Convert GPIO Davinci to platform driver

On Fri, Jun 07, 2013 at 13:40:52, Nori, Sekhar wrote:
> Hi Avinash,
> 
> On 5/22/2013 12:40 PM, Philip Avinash wrote:
> > GPIO Davinci driver converted to platform driver to support DT booting.
> > In this patch series
> > - Cleaned gpio Davinci driver code with proper commenting style and appropriate
> >   variable names.
> > - Create platform driver for GPIO Davinci in da8xx and dm* platforms and removed
> >   gpio related member updation in davinci_soc_info structure.
> > - DT support added for da850 board and tested on da850 EVM.
> > - Remove soc_info reference in the gpio davinci driver and start uses
> >   gpiolib interface.
> 
> Can you please document which platforms this series was tested on and how?

This series being tested on da850 EVM. Tested by setting VPIF_DOUT[12] as GPIO
pin [2] and reading GPIO status from GPIO[7,4]

GPIO[7,4] will reflect the status switch number 8 of the S7 dip switch in DA850 EVM.

Testing Procedure

Requirement GPIO SYSFS support [1]

#echo 116 > /sys/class/gpio/export
setting GPIO[7,4] as input GPIO
#echo "in" > /sys/class/gpio/gpio116/direction
#mount -t debugfs debugfs /sys/kernel/debug
Reading GPIO pin status
#cat /sys/kernel/debug/gpio
#echo 116 > /sys/class/gpio/unexport


1. Enable GPIO SYSFS support through menconfig
--- GPIO Support
	[ ]   Debug GPIO calls
               [ ]   /sys/class/gpio/... (sysfs interface)
 
2. Patch for pinmux support for GPIO[7,4] is available at
https://github.com/avinashphilip/am335x_linux/commits/linux_davinci_v3.10_soc_gpio


Thanks
Avinash

> 
> Thanks,
> Sekhar
>