static unsigned int lp872x_buck_get_mode(struct regulator_dev *rdev)
{
struct lp872x *lp = rdev_get_drvdata(rdev);
enum lp872x_regulator_id buck = rdev_get_id(rdev);
u8 addr, mask, val;
int ret;
switch (buck) {
case LP8720_ID_BUCK:
addr = LP8720_BUCK_VOUT2;
mask = LP8720_BUCK_FPWM_M;
break;
case LP8725_ID_BUCK1:
addr = LP8725_BUCK_CTRL;
mask = LP8725_BUCK1_FPWM_M;
break;
case LP8725_ID_BUCK2:
addr = LP8725_BUCK_CTRL;
mask = LP8725_BUCK2_FPWM_M;
break;
default:
return -EINVAL;
}
ret = lp872x_read_byte(lp, addr, &val);
if (ret)
return ret;
return val & mask ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;
}
static int lp8725_buck_get_current_limit(struct regulator_dev *rdev)
{
struct lp872x *lp = rdev_get_drvdata(rdev);
enum lp872x_regulator_id buck = rdev_get_id(rdev);
u8 addr, val;
int ret;
switch (buck) {
case LP8725_ID_BUCK1:
addr = LP8725_BUCK1_VOUT2;
break;
case LP8725_ID_BUCK2:
addr = LP8725_BUCK2_VOUT2;
break;
default:
return -EINVAL;
}
ret = lp872x_read_byte(lp, addr, &val);
if (ret)
return ret;
val = (val & LP8725_BUCK_CL_M) >> LP8725_BUCK_CL_S;
return (val < ARRAY_SIZE(lp8725_buck_uA)) ?
lp8725_buck_uA[val] : -EINVAL;
}
static int lp872x_get_timestep_usec(struct lp872x *lp)
{
enum lp872x_id chip = lp->chipid;
u8 val, mask, shift;
int *time_usec, size, ret;
int lp8720_time_usec[] = { 25, 50 };
int lp8725_time_usec[] = { 32, 64, 128, 256 };
switch (chip) {
case LP8720:
mask = LP8720_TIMESTEP_M;
shift = LP8720_TIMESTEP_S;
time_usec = &lp8720_time_usec[0];
size = ARRAY_SIZE(lp8720_time_usec);
break;
case LP8725:
mask = LP8725_TIMESTEP_M;
shift = LP8725_TIMESTEP_S;
time_usec = &lp8725_time_usec[0];
size = ARRAY_SIZE(lp8725_time_usec);
break;
default:
return -EINVAL;
}
ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val);
if (ret)
return -EINVAL;
val = (val & mask) >> shift;
if (val >= size)
return -EINVAL;
return *(time_usec + val);
}
static int lp872x_regulator_enable_time(struct regulator_dev *rdev)
{
struct lp872x *lp = rdev_get_drvdata(rdev);
enum lp872x_regulator_id rid = rdev_get_id(rdev);
int time_step_us = lp872x_get_timestep_usec(lp);
int ret;
u8 addr, val;
if (time_step_us < 0)
return time_step_us;
switch (rid) {
case LP8720_ID_LDO1 ... LP8720_ID_BUCK:
addr = LP872X_LDO1_VOUT + rid;
break;
case LP8725_ID_LDO1 ... LP8725_ID_BUCK1:
addr = LP872X_LDO1_VOUT + rid - LP8725_ID_BASE;
break;
case LP8725_ID_BUCK2:
addr = LP8725_BUCK2_VOUT1;
break;
default:
return -EINVAL;
}
ret = lp872x_read_byte(lp, addr, &val);
if (ret)
return ret;
val = (val & LP872X_START_DELAY_M) >> LP872X_START_DELAY_S;
return val > MAX_DELAY ? 0 : val * time_step_us;
}
static u8 lp872x_select_buck_vout_addr(struct lp872x *lp,
enum lp872x_regulator_id buck)
{
u8 val, addr;
if (lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val))
return 0;
switch (buck) {
case LP8720_ID_BUCK:
if (val & LP8720_EXT_DVS_M) {
addr = (lp->dvs_pin == DVS_HIGH) ?
LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2;
} else {
if (lp872x_read_byte(lp, LP8720_ENABLE, &val))
return 0;
addr = val & LP8720_DVS_SEL_M ?
LP8720_BUCK_VOUT1 : LP8720_BUCK_VOUT2;
}
break;
case LP8725_ID_BUCK1:
if (val & LP8725_DVS1_M)
addr = LP8725_BUCK1_VOUT1;
else
addr = (lp->dvs_pin == DVS_HIGH) ?
LP8725_BUCK1_VOUT1 : LP8725_BUCK1_VOUT2;
break;
case LP8725_ID_BUCK2:
addr = val & LP8725_DVS2_M ?
LP8725_BUCK2_VOUT1 : LP8725_BUCK2_VOUT2;
break;
default:
return 0;
}
return addr;
}
static int lp872x_buck_get_voltage_sel(struct regulator_dev *rdev)
{
struct lp872x *lp = rdev_get_drvdata(rdev);
enum lp872x_regulator_id buck = rdev_get_id(rdev);
u8 addr, val;
int ret;
addr = lp872x_select_buck_vout_addr(lp, buck);
if (!lp872x_is_valid_buck_addr(addr))
return -EINVAL;
ret = lp872x_read_byte(lp, addr, &val);
if (ret)
return ret;
return val & LP872X_VOUT_M;
}
static int lp872x_check_dvs_validity(struct lp872x *lp)
{
struct lp872x_dvs *dvs = lp->pdata->dvs;
u8 val = 0;
int ret;
ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val);
if (ret)
return ret;
ret = 0;
if (lp->chipid == LP8720) {
if (val & LP8720_EXT_DVS_M)
ret = dvs ? 0 : -EINVAL;
} else {
if ((val & LP8725_DVS1_M) == EXTERN_DVS_USED)
ret = dvs ? 0 : -EINVAL;
}
return ret;
}