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Date: Fri, 26 Jun 2009 10:17:10 +0000 From: Jonathan Cameron <jic23@....ac.uk> To: Liam Girdwood <lrg@...mlogic.co.uk> CC: LKML <linux-kernel@...r.kernel.org>, Mark Brown <broonie@...ena.org.uk>, mike.rapoport@...il.com, eric miao <eric.y.miao@...il.com> Subject: Re: da9030: ldo11 ignores disable Liam Girdwood wrote: > On Thu, 2009-06-25 at 15:39 +0000, Jonathan Cameron wrote: >> Hi All, >> >> Whilst testing a regulator machine config I've run into a weird issue. >> >> The preliminary data sheet I have suggests that there are two enable >> registers >> for ldo11 but neither rctl22 or rctl11 seems to have any effect (on >> their own >> or both cleared together). I can change the voltage just fine, but not >> actually turn it off. >> >> Anyone come across this problem or have any idea what is going on? > > I've come across something similar in the past with two enable bits > causing I2C register cache coherency issues. The cache bits became out > of sync with reality and stopped some I2C writes happening. Don't thing that could happen here. > > Another option is that your hardware config doesn't allow ldo11 to be > disabled ? Other than the obvious possibility that the hardware has a bug, I can't seem to find a reason why this shouldn't work. Thanks, Jonathan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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