From c09088d934c1e1672be8b3cfe3ba4f40ab2bf13e Mon Sep 17 00:00:00 2001 From: Anthony Olech Date: Wed, 18 Dec 2013 15:15:31 +0000 Subject: [PATCH] hwmon: (da9052) Fix adc to voltage calculation The ADC resolution of the PMIC is 10-bits, this means that the maximum possible value is 1023 and not the 1024 as originally in the code. Signed-off-by: Anthony Olech Signed-off-by: Guenter Roeck --- drivers/hwmon/da9052-hwmon.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/hwmon/da9052-hwmon.c b/drivers/hwmon/da9052-hwmon.c index 960fac3..afd3104 100644 --- a/drivers/hwmon/da9052-hwmon.c +++ b/drivers/hwmon/da9052-hwmon.c @@ -45,7 +45,7 @@ static const char * const input_names[] = { /* Conversion function for VDDOUT and VBAT */ static inline int volt_reg_to_mv(int value) { - return DIV_ROUND_CLOSEST(value * 1000, 512) + 2500; + return DIV_ROUND_CLOSEST(value * 2000, 1023) + 2500; } /* Conversion function for ADC channels 4, 5 and 6 */ @@ -57,7 +57,7 @@ static inline int input_reg_to_mv(int value) /* Conversion function for VBBAT */ static inline int vbbat_reg_to_mv(int value) { - return DIV_ROUND_CLOSEST(value * 2500, 512); + return DIV_ROUND_CLOSEST(value * 5000, 1023); } static inline int da9052_enable_vddout_channel(struct da9052 *da9052) -- 2.7.4