linux-kernel - Re: [PATCH 5/6] mfd/stmpexxx: fix stmpe811 enable hook

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Date:	Thu, 24 Jun 2010 14:32:11 +0200
From:	Luotao Fu <l.fu@...gutronix.de>
To:	Rabin VINCENT <rabin.vincent@...ricsson.com>
Cc:	Luotao Fu <l.fu@...gutronix.de>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Linus WALLEIJ <linus.walleij@...ricsson.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	STEricsson_nomadik_linux <STEricsson_nomadik_linux@...t.st.com>
Subject: Re: [PATCH 5/6] mfd/stmpexxx: fix stmpe811 enable hook

On Thu, Jun 24, 2010 at 05:41:00PM +0530, Rabin VINCENT wrote:
> On Thu, Jun 24, 2010 at 13:13:40 +0200, Luotao Fu wrote:
> > Fix the stmpe811 enable hook so that we can activate the needed clocks for the
> > touchscreen controller.
> > 
> > Signed-off-by: Luotao Fu <l.fu@...gutronix.de>
> > ---
> >  drivers/mfd/stmpe-devices.c |    5 +++--
> >  1 files changed, 3 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/mfd/stmpe-devices.c b/drivers/mfd/stmpe-devices.c
> > index 3e21c26..25941ea 100644
> > --- a/drivers/mfd/stmpe-devices.c
> > +++ b/drivers/mfd/stmpe-devices.c
> > @@ -117,8 +117,9 @@ static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks,
> >  	if (blocks & STMPE_BLOCK_ADC)
> >  		mask |= STMPE811_SYS_CTRL2_ADC_OFF;
> >  
> > -	if (blocks & STMPE_BLOCK_KEYPAD)
> > -		mask |= STMPE811_SYS_CTRL2_TSC_OFF;
> > +	if (blocks & STMPE_BLOCK_TOUCHSCREEN)
> > +		mask |= STMPE811_SYS_CTRL2_ADC_OFF
> > +			| STMPE811_SYS_CTRL2_TSC_OFF;
> 
> The KEYPAD -> TOUCHSCREEN fix is fine, but for the ADC, wouldn't it be
> better to pass in STMPE_BLOCK_ADC in your stmpe_enable() call instead?
> You wouldn't need to add another call, you can just pass in
> (STMPE_BLOCK_TOUCHSCREEN | STMPE_BLOCK_ADC) as the argument.

agreed, this would be more clear. Just sent the V2 of this fix and V5 of
the ts driver. I Btw mixed message IDs up and the V2 of the enable hook fix
went out with the same "reply to" ID as the ts driver. doh! sorry for the
confusion.

cheers
Luotao Fu
-- 
Pengutronix e.K.                           | Dipl.-Ing. Luotao Fu        |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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