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arm: odroid: pmic77686: allow buck voltage settings 

Allow to set the buck voltage for the max77686.
This will be used to reset the SMC LAN9730 ethernet on the odroids.

Signed-off-by: Suriyan Ramasami <suriyan.r@gmail.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Suriyan Ramasami 2014-10-29 09:22:41 -07:00 committed by Minkyu Kang
parent 7e2e04fe99
commit 7e46be8aed
2 changed files with 52 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/power/pmic/pmic_max77686.c
View File

@ -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) {

3
include/power/max77686_pmic.h
View File

@ -150,6 +150,7 @@ enum {
int max77686_set_ldo_voltage(struct pmic *p, int ldo, ulong uV);
int max77686_set_ldo_mode(struct pmic *p, int ldo, char opmode);
int max77686_set_buck_voltage(struct pmic *p, int buck, ulong uV);
int max77686_set_buck_mode(struct pmic *p, int buck, char opmode);
#define MAX77686_LDO_VOLT_MAX_HEX 0x3f
@ -159,6 +160,8 @@ int max77686_set_buck_mode(struct pmic *p, int buck, char opmode);
#define MAX77686_LDO_MODE_STANDBY (0x01 << 0x06)
#define MAX77686_LDO_MODE_LPM (0x02 << 0x06)
#define MAX77686_LDO_MODE_ON (0x03 << 0x06)
#define MAX77686_BUCK_VOLT_MAX_HEX 0x3f
#define MAX77686_BUCK_VOLT_MASK 0x3f
#define MAX77686_BUCK_MODE_MASK 0x03
#define MAX77686_BUCK_MODE_SHIFT_1 0x00
#define MAX77686_BUCK_MODE_SHIFT_2 0x04