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drivers:power:max77686: add function to set voltage and mode 

This patch add new functions to pmic max77686 to set voltage and mode.

Signed-off-by: Piotr Wilczek <p.wilczek@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Tom Rini <trini@ti.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Piotr Wilczek 2013-06-25 09:59:47 +02:00 committed by Minkyu Kang
parent cc2b1012cb
commit 812d7576cd
2 changed files with 218 additions and 0 deletions
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192
drivers/power/pmic/pmic_max77686.c
View File

@ -14,6 +14,198 @@
DECLARE_GLOBAL_DATA_PTR;
static const char max77686_buck_addr[] = {
0xff, 0x10, 0x12, 0x1c, 0x26, 0x30, 0x32, 0x34, 0x36, 0x38
};
static unsigned int max77686_ldo_volt2hex(int ldo, ulong uV)
{
unsigned int hex = 0;
switch (ldo) {
case 1:
case 2:
case 6:
case 7:
case 8:
case 15:
hex = (uV - 800000) / 25000;
break;
default:
hex = (uV - 800000) / 50000;
}
if (hex >= 0 && hex <= MAX77686_LDO_VOLT_MAX_HEX)
return hex;
debug("%s: %ld is wrong voltage value for LDO%d\n", __func__, uV, ldo);
return 0;
}
int max77686_set_ldo_voltage(struct pmic *p, int ldo, ulong uV)
{
unsigned int val, ret, hex, adr;
if (ldo < 1 && ldo > 26) {
printf("%s: %d is wrong ldo number\n", __func__, ldo);
return -1;
}
adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
hex = max77686_ldo_volt2hex(ldo, uV);
if (!hex)
return -1;
ret = pmic_reg_read(p, adr, &val);
if (ret)
return ret;
val &= ~MAX77686_LDO_VOLT_MASK;
val |= hex;
ret |= pmic_reg_write(p, adr, val);
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) {
printf("%s: %d is wrong ldo number\n", __func__, ldo);
return -1;
}
adr = MAX77686_REG_PMIC_LDO1CTRL1 + ldo - 1;
/* mode */
switch (opmode) {
case OPMODE_OFF:
mode = MAX77686_LDO_MODE_OFF;
break;
case OPMODE_STANDBY:
switch (ldo) {
case 2:
case 6:
case 7:
case 8:
case 10:
case 11:
case 12:
case 14:
case 15:
case 16:
mode = MAX77686_LDO_MODE_STANDBY;
break;
default:
mode = 0xff;
}
break;
case OPMODE_LPM:
mode = MAX77686_LDO_MODE_LPM;
break;
case OPMODE_ON:
mode = MAX77686_LDO_MODE_ON;
break;
default:
mode = 0xff;
}
if (mode == 0xff) {
printf("%s: %d is not supported on LDO%d\n",
__func__, opmode, ldo);
return -1;
}
ret = pmic_reg_read(p, adr, &val);
if (ret)
return ret;
val &= ~MAX77686_LDO_MODE_MASK;
val |= mode;
ret |= pmic_reg_write(p, adr, val);
return ret;
}
int max77686_set_buck_mode(struct pmic *p, int buck, char opmode)
{
unsigned int val, ret, mask, adr, size, mode, mode_shift;
size = ARRAY_SIZE(max77686_buck_addr);
if (buck >= size) {
printf("%s: %d is wrong buck number\n", __func__, buck);
return -1;
}
adr = max77686_buck_addr[buck];
/* mask */
switch (buck) {
case 2:
case 3:
case 4:
mode_shift = MAX77686_BUCK_MODE_SHIFT_2;
break;
default:
mode_shift = MAX77686_BUCK_MODE_SHIFT_1;
}
mask = MAX77686_BUCK_MODE_MASK << mode_shift;
/* mode */
switch (opmode) {
case OPMODE_OFF:
mode = MAX77686_BUCK_MODE_OFF;
break;
case OPMODE_STANDBY:
switch (buck) {
case 1:
case 2:
case 3:
case 4:
mode = MAX77686_BUCK_MODE_STANDBY << mode_shift;
break;
default:
mode = 0xff;
}
break;
case OPMODE_LPM:
switch (buck) {
case 2:
case 3:
case 4:
mode = MAX77686_BUCK_MODE_LPM << mode_shift;
break;
default:
mode = 0xff;
}
break;
case OPMODE_ON:
mode = MAX77686_BUCK_MODE_ON << mode_shift;
break;
default:
mode = 0xff;
}
if (mode == 0xff) {
printf("%s: %d is not supported on BUCK%d\n",
__func__, opmode, buck);
return -1;
}
ret = pmic_reg_read(p, adr, &val);
if (ret)
return ret;
val &= ~mask;
val |= mode;
ret |= pmic_reg_write(p, adr, val);
return ret;
}
int pmic_init(unsigned char bus)
{
static const char name[] = "MAX77686_PMIC";

26
include/power/max77686_pmic.h
View File

@ -139,6 +139,32 @@ enum {
EN_LDO = (0x3 << 6),
};
enum {
OPMODE_OFF = 0,
OPMODE_STANDBY,
OPMODE_LPM,
OPMODE_ON,
};
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_mode(struct pmic *p, int buck, char opmode);
#define MAX77686_LDO_VOLT_MAX_HEX 0x3f
#define MAX77686_LDO_VOLT_MASK 0x3f
#define MAX77686_LDO_MODE_MASK 0xc0
#define MAX77686_LDO_MODE_OFF (0x00 << 0x06)
#define MAX77686_LDO_MODE_STANDBY (0x01 << 0x06)
#define MAX77686_LDO_MODE_LPM (0x02 << 0x06)
#define MAX77686_LDO_MODE_ON (0x03 << 0x06)
#define MAX77686_BUCK_MODE_MASK 0x03
#define MAX77686_BUCK_MODE_SHIFT_1 0x00
#define MAX77686_BUCK_MODE_SHIFT_2 0x04
#define MAX77686_BUCK_MODE_OFF 0x00
#define MAX77686_BUCK_MODE_STANDBY 0x01
#define MAX77686_BUCK_MODE_LPM 0x02
#define MAX77686_BUCK_MODE_ON 0x03
/* Buck1 1 volt value */
#define MAX77686_BUCK1OUT_1V 0x5
/* Buck1 1.05 volt value */