static int pm8058_init_regulator(struct pm8058_chip *chip,
struct pm8058_vreg *vreg)
{
int rc = 0, i;
u8 bank;
/* save the current control register state */
rc = pm8058_read(chip, vreg->ctrl_addr, &vreg->ctrl_reg, 1);
if (rc)
return rc;
/* save the current test/test2 register state */
if (vreg->type == REGULATOR_TYPE_LDO) {
for (i = 0; i < LDO_TEST_BANKS; i++) {
bank = REGULATOR_BANK_SEL(i);
rc = pm8058_write(chip, vreg->test_addr,
&bank, 1);
if (rc)
goto bail;
rc = pm8058_read(chip, vreg->test_addr,
&vreg->test_reg[i], 1);
if (rc)
goto bail;
}
} else if (vreg->type == REGULATOR_TYPE_SMPS) {
for (i = 0; i < SMPS_TEST_BANKS; i++) {
bank = REGULATOR_BANK_SEL(i);
rc = pm8058_write(chip, vreg->test2_addr,
&bank, 1);
if (rc)
goto bail;
rc = pm8058_read(chip, vreg->test2_addr,
&vreg->test2_reg[i], 1);
if (rc)
goto bail;
}
rc = pm8058_read(chip, vreg->clk_ctrl_addr,
&vreg->clk_ctrl_reg, 1);
if (rc)
goto bail;
}
bail:
if (rc)
pr_err("%s: pm8058_read/write failed\n", __func__);
return rc;
}
static int pm8058_nldo_set_voltage(struct pm8058_chip *chip,
struct pm8058_vreg *vreg, int uV)
{
int rc;
u8 mask, val = 0;
if (uV > NLDO_UV_MAX) {
uV -= NLDO_FINE_STEP_UV;
val = LDO_TEST_FINE_STEP_MASK;
}
/* update reference voltage and fine step selection if necessary */
if ((vreg->test_reg[2] & LDO_TEST_FINE_STEP_MASK) != val) {
val |= REGULATOR_BANK_SEL(2) | REGULATOR_BANK_WRITE;
mask = LDO_TEST_FINE_STEP_MASK | val;
rc = pm8058_vreg_write(chip, vreg->test_addr, val,
mask, &vreg->test_reg[2]);
if (rc) {
pr_err("%s: pm8058_write failed\n", __func__);
return rc;
}
}
/* voltage programming */
val = (uV - NLDO_UV_MIN) / NLDO_UV_STEP;
rc = pm8058_vreg_write(chip, vreg->ctrl_addr, val,
LDO_CTRL_VPROG_MASK, &vreg->ctrl_reg);
if (rc)
pr_err("%s: pm8058_write failed\n", __func__);
return rc;
}
static int pm8901_init_regulator(struct pm8901_chip *chip,
struct pm8901_vreg *vreg)
{
int rc, i;
u8 bank;
if (vreg->type == REGULATOR_TYPE_LDO) {
for (i = 0; i < LDO_TEST_BANKS; i++) {
bank = REGULATOR_BANK_SEL(i);
rc = pm8901_write(chip, vreg->test_addr,
&bank, 1);
if (rc)
goto bail;
rc = pm8901_read(chip, vreg->test_addr,
&vreg->test_reg[i], 1);
if (rc)
goto bail;
}
}
rc = pm8901_read(chip, vreg->ctrl_addr, &vreg->ctrl_reg, 1);
if (rc)
goto bail;
rc = pm8901_read(chip, vreg->pmr_addr, &vreg->pmr_reg, 1);
bail:
if (rc)
pr_err("%s: pm8901_read failed\n", __func__);
return rc;
}
static int pm8058_ldo_set_mode(struct regulator_dev *dev, unsigned int mode)
{
struct pm8058_vreg *vreg = rdev_get_drvdata(dev);
struct pm8058_chip *chip = dev_get_drvdata(dev->dev.parent);
int rc = 0;
u8 ctrl, test, mask, val;
if (mode == REGULATOR_MODE_NORMAL) {
/* disable low power mode */
test = LDO_TEST_LPM_SEL_TCXO;
ctrl = LDO_CTRL_PM_NORMAL;
} else if (mode == REGULATOR_MODE_IDLE) {
/* enable low power mode but follow tcxo */
test = LDO_TEST_LPM_SEL_TCXO;
ctrl = LDO_CTRL_PM_LOW;
} else if (mode == REGULATOR_MODE_STANDBY) {
/* force low power mode */
test = LDO_TEST_LPM_SEL_CTRL;
ctrl = LDO_CTRL_PM_LOW;
} else {
return -EINVAL;
}
if ((vreg->test_reg[0] & LDO_TEST_LPM_MASK) != test) {
val = REGULATOR_EN_MASK | REGULATOR_BANK_SEL(0) | test;
mask = REGULATOR_EN_MASK | REGULATOR_BANK_SEL(0) |
LDO_TEST_LPM_MASK;
rc = pm8058_vreg_write(chip, vreg->test_addr,
val, mask, &vreg->test_reg[0]);
if (rc) {
pr_err("%s: pm8058_vreg_write failed\n", __func__);
return rc;
}
}
if ((vreg->ctrl_reg & LDO_CTRL_PM_MASK) != ctrl) {
val = ctrl;
mask = LDO_CTRL_PM_MASK;
rc = pm8058_vreg_write(chip, vreg->ctrl_addr,
val, mask, &vreg->ctrl_reg);
if (rc)
pr_err("%s: pm8058_vreg_write failed\n", __func__);
}
return rc;
}
static int pm8058_smps_set_voltage(struct regulator_dev *dev,
int min_uV, int max_uV)
{
struct pm8058_vreg *vreg = rdev_get_drvdata(dev);
struct pm8058_chip *chip = dev_get_drvdata(dev->dev.parent);
int rc;
u8 val, mask, vlow;
if (min_uV >= SMPS_MODE3_UV_MIN && min_uV <= SMPS_MODE3_UV_MAX) {
vlow = SMPS_VLOW_SEL_MASK;
val = ((min_uV - SMPS_MODE3_UV_MIN) / SMPS_MODE3_STEP) |
SMPS_VREF_SEL_MASK;
} else if (min_uV >= SMPS_MODE2_UV_MIN && min_uV <= SMPS_MODE2_UV_MAX) {
vlow = 0;
val = ((min_uV - SMPS_MODE2_UV_MIN) / SMPS_MODE2_STEP) |
SMPS_VREF_SEL_MASK;
} else if (min_uV >= SMPS_MODE1_UV_MIN && min_uV <= SMPS_MODE1_UV_MAX) {
vlow = 0;
val = (min_uV - SMPS_MODE1_UV_MIN) / SMPS_MODE1_STEP;
} else {
return -EINVAL;
}
/* set vlow bit for ultra low voltage mode */
if ((vreg->test2_reg[1] & SMPS_VLOW_SEL_MASK) != vlow) {
vlow |= REGULATOR_BANK_WRITE | REGULATOR_BANK_SEL(1);
mask = vlow | SMPS_VLOW_SEL_MASK;
rc = pm8058_vreg_write(chip, vreg->test2_addr,
vlow, mask, &vreg->test2_reg[1]);
}
/* voltage setting */
mask = SMPS_VREF_SEL_MASK | SMPS_VPROG_MASK;
rc = pm8058_vreg_write(chip, vreg->ctrl_addr, val, mask,
&vreg->ctrl_reg);
if (rc)
pr_err("%s: pm8058_vreg_write failed\n", __func__);
return rc;
}
/*
* Set an SMPS regulator to be disabled in its CTRL register, but enabled
* in the master enable register. Also set it's pull down enable bit.
* Take care to make sure that the output voltage doesn't change if switching
* from advanced mode to legacy mode.
*/
static int disable_smps_locally_set_pull_down(u16 ctrl_addr, u16 test2_addr,
u16 master_enable_addr, u8 master_enable_bit)
{
int rc = 0;
u8 vref_sel, vlow_sel, band, vprog, bank, reg;
if (pmic_chip == NULL)
return -ENODEV;
bank = REGULATOR_BANK_SEL(7);
rc = ssbi_write(pmic_chip->dev, test2_addr, &bank, 1);
if (rc) {
pr_err("%s: FAIL ssbi_write(0x%03X): rc=%d\n", __func__,
test2_addr, rc);
goto done;
}
rc = ssbi_read(pmic_chip->dev, test2_addr, ®, 1);
if (rc) {
pr_err("%s: FAIL pm8058_read(0x%03X): rc=%d\n",
__func__, test2_addr, rc);
goto done;
}
/* Check if in advanced mode. */
if ((reg & SMPS_ADVANCED_MODE_MASK) == SMPS_ADVANCED_MODE) {
/* Determine current output voltage. */
rc = ssbi_read(pmic_chip->dev, ctrl_addr, ®, 1);
if (rc) {
pr_err("%s: FAIL pm8058_read(0x%03X): rc=%d\n",
__func__, ctrl_addr, rc);
goto done;
}
band = (reg & SMPS_ADVANCED_BAND_MASK)
>> SMPS_ADVANCED_BAND_SHIFT;
switch (band) {
case 3:
vref_sel = 0;
vlow_sel = 0;
break;
case 2:
vref_sel = SMPS_LEGACY_VREF_SEL;
vlow_sel = 0;
break;
case 1:
vref_sel = SMPS_LEGACY_VREF_SEL;
vlow_sel = SMPS_LEGACY_VLOW_SEL;
break;
default:
pr_err("%s: regulator already disabled\n", __func__);
return -EPERM;
}
vprog = (reg & SMPS_ADVANCED_VPROG_MASK);
/* Round up if fine step is in use. */
vprog = (vprog + 1) >> 1;
if (vprog > SMPS_LEGACY_VPROG_MASK)
vprog = SMPS_LEGACY_VPROG_MASK;
/* Set VLOW_SEL bit. */
bank = REGULATOR_BANK_SEL(1);
rc = ssbi_write(pmic_chip->dev, test2_addr, &bank, 1);
if (rc) {
pr_err("%s: FAIL ssbi_write(0x%03X): rc=%d\n",
__func__, test2_addr, rc);
goto done;
}
rc = pm8058_masked_write(test2_addr,
REGULATOR_BANK_WRITE | REGULATOR_BANK_SEL(1)
| vlow_sel,
REGULATOR_BANK_WRITE | REGULATOR_BANK_MASK
| SMPS_LEGACY_VLOW_SEL);
if (rc)
goto done;
/* Switch to legacy mode */
bank = REGULATOR_BANK_SEL(7);
rc = ssbi_write(pmic_chip->dev, test2_addr, &bank, 1);
if (rc) {
pr_err("%s: FAIL ssbi_write(0x%03X): rc=%d\n", __func__,
test2_addr, rc);
goto done;
}
rc = pm8058_masked_write(test2_addr,
REGULATOR_BANK_WRITE | REGULATOR_BANK_SEL(7)
| SMPS_LEGACY_MODE,
REGULATOR_BANK_WRITE | REGULATOR_BANK_MASK
| SMPS_ADVANCED_MODE_MASK);
if (rc)
goto done;
/* Enable locally, enable pull down, keep voltage the same. */
rc = pm8058_masked_write(ctrl_addr,
REGULATOR_ENABLE | REGULATOR_PULL_DOWN_EN
| vref_sel | vprog,
REGULATOR_ENABLE_MASK | REGULATOR_PULL_DOWN_MASK
| SMPS_LEGACY_VREF_SEL | SMPS_LEGACY_VPROG_MASK);
if (rc)
goto done;
}
static int pm8058_pldo_set_voltage(struct pm8058_chip *chip,
struct pm8058_vreg *vreg, int uV)
{
int min, max, step, fine_step, rc;
u8 range_extn, vref, mask, val = 0;
if (uV >= PLDO_LOW_UV_MIN &&
uV <= PLDO_LOW_UV_MAX + PLDO_LOW_UV_STEP) {
min = PLDO_LOW_UV_MIN;
max = PLDO_LOW_UV_MAX;
step = PLDO_LOW_UV_STEP;
fine_step = PLDO_LOW_FINE_STEP_UV;
range_extn = 0;
vref = LDO_TEST_VREF_MASK;
} else if (uV >= PLDO_NORM_UV_MIN &&
uV <= PLDO_NORM_UV_MAX + PLDO_NORM_UV_STEP) {
min = PLDO_NORM_UV_MIN;
max = PLDO_NORM_UV_MAX;
step = PLDO_NORM_UV_STEP;
fine_step = PLDO_NORM_FINE_STEP_UV;
range_extn = 0;
vref = 0;
} else {
min = PLDO_HIGH_UV_MIN;
max = PLDO_HIGH_UV_MAX;
step = PLDO_HIGH_UV_STEP;
fine_step = PLDO_HIGH_FINE_STEP_UV;
range_extn = LDO_TEST_RANGE_EXTN_MASK;
vref = 0;
}
if (uV > max) {
uV -= fine_step;
val = LDO_TEST_FINE_STEP_MASK;
}
/* update reference voltage and fine step selection if necessary */
if ((vreg->test_reg[2] & LDO_TEST_FINE_STEP_MASK) != val ||
(vreg->test_reg[2] & LDO_TEST_VREF_MASK) != vref) {
val |= REGULATOR_BANK_SEL(2) | REGULATOR_BANK_WRITE |
LDO_TEST_VREF_UPDATE_MASK | vref;
mask = LDO_TEST_VREF_MASK | LDO_TEST_FINE_STEP_MASK | val;
rc = pm8058_vreg_write(chip, vreg->test_addr, val,
mask, &vreg->test_reg[2]);
if (rc) {
pr_err("%s: pm8058_write failed\n", __func__);
return rc;
}
}
/* update range extension if necessary */
if ((vreg->test_reg[4] & LDO_TEST_RANGE_EXTN_MASK) != range_extn) {
val = REGULATOR_BANK_SEL(4) | REGULATOR_BANK_WRITE |
range_extn;
mask = LDO_TEST_RANGE_EXTN_MASK | val;
rc = pm8058_vreg_write(chip, vreg->test_addr, val,
mask, &vreg->test_reg[4]);
if (rc) {
pr_err("%s: pm8058_write failed\n", __func__);
return rc;
}
}
/* voltage programming */
val = (uV - min) / step;
rc = pm8058_vreg_write(chip, vreg->ctrl_addr, val,
LDO_CTRL_VPROG_MASK, &vreg->ctrl_reg);
if (rc)
pr_err("%s: pm8058_write failed\n", __func__);
return rc;
}
