From 1b7ccabcc372152d1492241610e52b8ea14b0968 Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Mon, 5 Mar 2012 15:01:04 -0800 Subject: [PATCH] x86/mid/thermal: Turn off thermistor 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 Signed-off-by: Kirill A. Shutemov Signed-off-by: Alan Cox Acked-by: Durgadoss R Acked-by: H. Peter Anvin Cc: Matthew Garrett Signed-off-by: Andrew Morton Link: http://lkml.kernel.org/n/tip-85zdo06yve1o27jpwc74gzng@git.kernel.org Signed-off-by: Ingo Molnar --- drivers/platform/x86/intel_mid_thermal.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/platform/x86/intel_mid_thermal.c b/drivers/platform/x86/intel_mid_thermal.c index 5917b3c83728..2ee9766737ea 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();