linux-kernel - RE: [PATCH] regulator: twl-regulator

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Date:	Thu, 4 Nov 2010 15:08:55 +0530
From:	"Lesly Arackal Manuel" <leslyam@...com>
To:	"'Lesly Arackal Manuel'" <leslyam@...com>,
	"'Nayak, Rajendra'" <rnayak@...com>,
	"'Liam Girdwood'" <lrg@...mlogic.co.uk>
Cc:	"'Axel Lin'" <axel.lin@...il.com>,
	"'linux-kernel'" <linux-kernel@...r.kernel.org>,
	"'Juha Keski-Saari'" <ext-juha.1.keski-saari@...ia.com>,
	"'Mark Brown'" <broonie@...nsource.wolfsonmicro.com>
Subject: RE: [PATCH] regulator: twl-regulator - fix twlreg_set_mode

Forgot to mention-

Only omap hsmmc driver is using regulator_set_mode() which will call
twlreg_set_mode().

> -----Original Message-----
> From: Lesly Arackal Manuel [mailto:leslyam@...com]
> Sent: Thursday, November 04, 2010 3:01 PM
> To: 'Nayak, Rajendra'; 'Liam Girdwood'
> Cc: 'Axel Lin'; 'linux-kernel'; 'Juha Keski-Saari'; 'Mark Brown'
> Subject: RE: [PATCH] regulator: twl-regulator - fix twlreg_set_mode
> 
> 
> I have tested it with MMC card inserted on OMAP3630SDP board (using OMAP3
> integration tree).
> 
> The changes seem to be valid.
> 
> The i2c_transfer() returns '1' on success and the twl_i2c_write() which
> calls i2c_transfer returns '0' if success and err value if it fails.
> 
> After writing the MSB if it returns with check:
> if (status >= 0)
> 	return status;
> It is not writing the LSB.
> 
> So it should be:
> if (status < 0)
> 	return status;
> 
> Regards,
> Lesly AM
> 
> > -----Original Message-----
> > From: Nayak, Rajendra [mailto:rnayak@...com]
> > Sent: Tuesday, October 26, 2010 3:40 PM
> > To: Liam Girdwood
> > Cc: Axel Lin; linux-kernel; Juha Keski-Saari; Mark Brown; Manuel, Lesly
> > Arackal
> > Subject: RE: [PATCH] regulator: twl-regulator - fix twlreg_set_mode
> >
> >
> >
> > > -----Original Message-----
> > > From: Liam Girdwood [mailto:lrg@...mlogic.co.uk]
> > > Sent: Saturday, October 23, 2010 7:17 PM
> > > To: Nayak, Rajendra
> > > Cc: Axel Lin; linux-kernel; Juha Keski-Saari; Mark Brown
> > > Subject: Re: [PATCH] regulator: twl-regulator - fix twlreg_set_mode
> > >
> > > On Fri, 2010-10-22 at 08:30 -0700, Mark Brown wrote:
> > > > On Fri, Oct 22, 2010 at 04:38:22PM +0800, Axel Lin wrote:
> > > > > The Singular Message is 16 bits:
> > > > >         DEV_GRP[15:13] MT[12]  RES_ID[11:4]  RES_STATE[3:0]
> > > > >
> > > > > Current implementation return immedially after sucessfuly write
> MSB
> > part.
> > > > > To properly set mode, we need to write the complete message ( MSB
> > and LSB ).
> > > > >
> > > > > In twl.h, now we have defines for PM Master module register
> offsets,
> > > > > use it instead of hard coded 0x15/0x16.
> > > > >
> > > > > Use "message & 0xff" to ensure we send correct value for LSB.
> > > > >
> > > > > Signed-off-by: Axel Lin <axel.lin@...il.com>
> > > >
> > > > Acked-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
> > > >
> > > > > I don't have this hardware handy, I appreciate if someone who has
> > the
> > > > > hardware can test this patch.
> > > >
> > > > I beleive Liam has appropriate hardware.
> > >
> > > Rejendra, care to test this ?
> >
> > Sure, either me or Lesly will test this on one of the twl4030 based
> > platforms
> > and update.
> >
> > >
> > > Thanks
> > >
> > > Liam
> > > --
> > > Freelance Developer, SlimLogic Ltd
> > > ASoC and Voltage Regulator Maintainer.
> > > http://www.slimlogic.co.uk


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