diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/pmic/pmic_max77686.c | 52 |
1 files changed, 49 insertions, 3 deletions
diff --git a/drivers/power/pmic/pmic_max77686.c b/drivers/power/pmic/pmic_max77686.c index df1fd91..95b1a57 100644 --- a/drivers/power/pmic/pmic_max77686.c +++ b/drivers/power/pmic/pmic_max77686.c @@ -42,11 +42,30 @@ static unsigned int max77686_ldo_volt2hex(int ldo, ulong uV) return 0; } +static int max77686_buck_volt2hex(int buck, ulong uV) +{ + int hex = 0; + + if (buck < 5 || buck > 9) { + debug("%s: buck %d is not supported\n", __func__, buck); + return -EINVAL; + } + + hex = (uV - 750000) / 50000; + + if (hex >= 0 && hex <= MAX77686_BUCK_VOLT_MAX_HEX) + return hex; + + debug("%s: %ld is wrong voltage value for BUCK%d\n", + __func__, uV, buck); + return -EINVAL; +} + int max77686_set_ldo_voltage(struct pmic *p, int ldo, ulong uV) { unsigned int val, ret, hex, adr; - if (ldo < 1 && ldo > 26) { + if (ldo < 1 || ldo > 26) { printf("%s: %d is wrong ldo number\n", __func__, ldo); return -1; } @@ -68,11 +87,38 @@ int max77686_set_ldo_voltage(struct pmic *p, int ldo, ulong uV) return ret; } +int max77686_set_buck_voltage(struct pmic *p, int buck, ulong uV) +{ + unsigned int val, adr; + int hex, ret; + + if (buck < 5 || buck > 9) { + printf("%s: %d is an unsupported bucket number\n", + __func__, buck); + return -EINVAL; + } + + adr = max77686_buck_addr[buck] + 1; + hex = max77686_buck_volt2hex(buck, uV); + + if (hex < 0) + return hex; + + ret = pmic_reg_read(p, adr, &val); + if (ret) + return ret; + + val &= ~MAX77686_BUCK_VOLT_MASK; + ret |= pmic_reg_write(p, adr, val | hex); + + return ret; +} + int max77686_set_ldo_mode(struct pmic *p, int ldo, char opmode) { unsigned int val, ret, adr, mode; - if (ldo < 1 && 26 < ldo) { + if (ldo < 1 || 26 < ldo) { printf("%s: %d is wrong ldo number\n", __func__, ldo); return -1; } @@ -157,7 +203,7 @@ int max77686_set_buck_mode(struct pmic *p, int buck, char opmode) /* mode */ switch (opmode) { case OPMODE_OFF: - mode = MAX77686_BUCK_MODE_OFF; + mode = MAX77686_BUCK_MODE_OFF << mode_shift; break; case OPMODE_STANDBY: switch (buck) { |