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authorMika Westerberg <mika.westerberg@linux.intel.com>2011-12-15 22:28:24 +0000
committerMatthew Garrett <mjg@redhat.com>2012-03-20 12:02:20 -0400
commit0266e49b3fd37065f9f90856c75f442c020bd96e (patch)
treefb4c0e80038b533108ab8fbb72617d79484a7d65 /drivers/platform
parent420138a7477eaebafddaefb7412736d924ca7d73 (diff)
platform-x86: intel_mid_thermal: turn off thermistor voltage by default
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> Signed-off-by: Matthew Garrett <mjg@redhat.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/intel_mid_thermal.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/platform/x86/intel_mid_thermal.c b/drivers/platform/x86/intel_mid_thermal.c
index b07f93d64a9..acd7d2d3d91 100644
--- a/drivers/platform/x86/intel_mid_thermal.c
+++ b/drivers/platform/x86/intel_mid_thermal.c
@@ -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();