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mfd: Mark WM1811 GPIO6 register volatile for later revisions
authorMark Brown <broonie@opensource.wolfsonmicro.com>
Thu, 1 Dec 2011 13:55:49 +0000 (13:55 +0000)
committerMark Brown <broonie@opensource.wolfsonmicro.com>
Mon, 12 Dec 2011 16:11:49 +0000 (00:11 +0800)
For later chip revisions the WM1811 GPIO6 register is always volatile so
store the device revision when initialising the driver and then check at
runtime if we're running on a newer device.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>

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