linux-kernel - Re: [[PATCH v2]] OMAP: omap4-panda: add WiLink shared transport power functions

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Date:	Thu, 17 Jan 2013 11:35:16 +0200
From:	Luciano Coelho <coelho@...com>
To:	Peter Ujfalusi <peter.ujfalusi@...com>
CC:	<tony@...mide.com>, <linux-omap@...r.kernel.org>,
	<linux@....linux.org.uk>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [[PATCH v2]] OMAP: omap4-panda: add WiLink shared transport
 power functions

On Thu, 2013-01-17 at 10:30 +0100, Peter Ujfalusi wrote:
> Hi Luca,

Hi Péter!

> On 01/16/2013 10:45 PM, Luciano Coelho wrote:
> >  static struct ti_st_plat_data wilink_platform_data = {
> > -	.nshutdown_gpio	= 46,
> >  	.dev_name	= "/dev/ttyO1",
> >  	.flow_cntrl	= 1,
> >  	.baud_rate	= 3000000,
> > -	.chip_enable	= NULL,
> > -	.suspend	= NULL,
> > -	.resume		= NULL,
> > +	.chip_enable	= plat_kim_chip_enable,
> > +	.chip_disable	= plat_kim_chip_disable,
> 
> I just wonder how this is going to work with DT... You are not going to have
> the ability to use callback in this form.
> I think the GPIO handling should be done in the driver itself rather than in
> the board file.

I agree.  The problem is that it used to be in the ti-st driver itself,
but it has been removed in a patch that says "different platforms have
begun to have their own ways to power-up/down the chip." (eccf2979
drivers/misc/ti-st: remove gpio handling).

This needs to be clarified first.  I think we could use this for now and
later fix this properly (hopefully move it back to the ti-st driver).

--
Cheers,
Luca.

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