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x86/mid/thermal: Turn off thermistor

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Instead of complaining that the voltage is on, we can just ask
the MSIC to turn the voltage off. This should save some power.

Voltage for thermistors is turned on when ADC conversion is
initiated.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Durgadoss R <durgadoss.r@intel.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Cc: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-85zdo06yve1o27jpwc74gzng@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mika Westerberg 2012-03-05 15:01:04 -08:00 committed by Ingo Molnar
parent 634830704d
commit 1b7ccabcc3
1 changed files with 4 additions and 2 deletions
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6
drivers/platform/x86/intel_mid_thermal.c
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@ -360,8 +360,10 @@ static int mid_initialize_adc(struct device *dev)
if (ret)
return ret;
if (data & MSIC_ADCTHERM_MASK)
dev_warn(dev, "ADCTHERM already set");
data &= ~MSIC_ADCTHERM_MASK;
ret = intel_msic_reg_write(INTEL_MSIC_ADC1CNTL3, data);
if (ret)
return ret;
/* Index of the first channel in which the stop bit is set */
channel_index = find_free_channel();