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mfd: Fix ab8500-gpadc to measure charger current 

The GPADC in the AB8500 was incorrectly configured when a charger
current channel was selected.

Signed-off-by: Karl Komierowski <karl.komierowski@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Karl Komierowski 2011-03-05 11:46:45 +01:00 committed by Samuel Ortiz
parent 586f3318ad
commit 4aad5a918c
1 changed files with 18 additions and 3 deletions
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17
drivers/mfd/ab8500-gpadc.c
View File

@ -56,6 +56,7 @@
#define DIS_GPADC 0x00
#define SW_AVG_16 0x60
#define ADC_SW_CONV 0x04
#define EN_ICHAR 0x80
#define EN_BUF 0x40
#define DIS_ZERO 0x00
#define GPADC_BUSY 0x01
@ -281,9 +282,23 @@ int ab8500_gpadc_convert(struct ab8500_gpadc *gpadc, u8 input)
"gpadc_conversion: set avg samples failed\n");
goto out;
}
/* Enable ADC, Buffering and select rising edge, start Conversion */
/*
* Enable ADC, buffering, select rising edge and enable ADC path
* charging current sense if it needed
*/
switch (input) {
case MAIN_CHARGER_C:
case USB_CHARGER_C:
ret = abx500_mask_and_set_register_interruptible(gpadc->dev,
AB8500_GPADC, AB8500_GPADC_CTRL1_REG,
EN_BUF | EN_ICHAR,
EN_BUF | EN_ICHAR);
break;
default:
ret = abx500_mask_and_set_register_interruptible(gpadc->dev,
AB8500_GPADC, AB8500_GPADC_CTRL1_REG, EN_BUF, EN_BUF);
break;
}
if (ret < 0) {
dev_err(gpadc->dev,
"gpadc_conversion: select falling edge failed\n");