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hwmon: (da9052) Fix adc to voltage calculation

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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 <anthony.olech.opensource@diasemi.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Anthony Olech 2013-12-18 15:15:31 +00:00 committed by Guenter Roeck
parent 9fb6c9c73b
commit c09088d934
1 changed files with 2 additions and 2 deletions
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4
drivers/hwmon/da9052-hwmon.c
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@ -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)