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pmic:max8997: Function for calculating LDO internal register value

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Function for calculating LDO internal register value from passed micro
Volt.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Łukasz Majewski 2012-11-13 03:22:04 +00:00 committed by Anatolij Gustschin
parent b95aacd332
commit bf995a9a28
2 changed files with 18 additions and 0 deletions
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16
drivers/power/pmic/pmic_max8997.c
View File

@ -27,6 +27,22 @@
#include <i2c.h>
#include <errno.h>
unsigned char max8997_reg_ldo(int uV)
{
unsigned char ret;
if (uV <= 800000)
return 0;
if (uV >= 3950000)
return MAX8997_LDO_MAX_VAL;
ret = (uV - 800000) / 50000;
if (ret > MAX8997_LDO_MAX_VAL) {
printf("MAX8997 LDO SETTING ERROR (%duV) -> %u\n", uV, ret);
ret = MAX8997_LDO_MAX_VAL;
}
return ret;
}
int pmic_init(unsigned char bus)
{
static const char name[] = "MAX8997_PMIC";

2
include/power/max8997_pmic.h
View File

@ -200,4 +200,6 @@ enum {
EN_LDO = (0x3 << 6),
};
#define MAX8997_LDO_MAX_VAL 0x3F
unsigned char max8997_reg_ldo(int uV);
#endif /* __MAX8997_PMIC_H_ */