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authorKarl Komierowski <karl.komierowski@stericsson.com>2011-03-05 11:46:45 +0100
committerSamuel Ortiz <sameo@linux.intel.com>2011-03-23 10:42:04 +0100
commit4aad5a918c919c04b6c3136f3c4dcafada3b6319 (patch)
tree80d6e137f2dabefd908ef32f4eaa86566181d3dc /drivers/mfd/ab8500-gpadc.c
parent586f3318adceee4857e82cafc3610070368754e3 (diff)
downloadlinux-4aad5a918c919c04b6c3136f3c4dcafada3b6319.tar.gz
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>
Diffstat (limited to 'drivers/mfd/ab8500-gpadc.c')
-rw-r--r--drivers/mfd/ab8500-gpadc.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c
index a70201a7472..2ad3115f777 100644
--- a/drivers/mfd/ab8500-gpadc.c
+++ b/drivers/mfd/ab8500-gpadc.c
@@ -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 */
- ret = abx500_mask_and_set_register_interruptible(gpadc->dev,
- AB8500_GPADC, AB8500_GPADC_CTRL1_REG, EN_BUF, EN_BUF);
+ /*
+ * 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");