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Subject[PATCH RFC/RFT 2/2] regulator: Refactor to use one da9052_ldo_ops/da9052_dcdc_ops for all LDOs/DCDCs
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In current implementation, da9052_ldo_ops and da9052_ldo5_6_ops are very
similar, only the set_voltage is slightly different.
da9052_buckperi_ops and da9052_dcdc_ops are also similar.

This patch adds da9052_regulator_set_voltage for the set_voltage callback
used by all LDOs and DCDCs. Rework da9052_get_regulator_voltage_sel and
da9052_set_dcdc_voltage to make it possible to be shared by all DCDCs.
Rework da9052_list_voltage to make it to be shared by all DCDCs and LDOs.

Then we can remove da9052_ldo5_6_ops and da9052_buckperi_ops.
We can also remove DA9052_LDO5_6 and DA9052_BUCKPERI macros which is not used
now.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
---
drivers/regulator/da9052-regulator.c | 230 +++++++---------------------------
1 files changed, 44 insertions(+), 186 deletions(-)
diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
index ddcba36..7eb7293 100644
--- a/drivers/regulator/da9052-regulator.c
+++ b/drivers/regulator/da9052-regulator.c
@@ -189,36 +189,23 @@ static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
reg_val << 6);
}

-static int da9052_list_buckperi_voltage(struct regulator_dev *rdev,
- unsigned int selector)
-{
- struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
- struct da9052_regulator_info *info = regulator->info;
- int volt_uV;
-
- if ((regulator->da9052->chip_id == DA9052) &&
- (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
- volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
- + info->min_uV);
- volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
- * (DA9052_BUCK_PERI_3uV_STEP);
- } else
- volt_uV = (selector * info->step_uV) + info->min_uV;
-
- if (volt_uV > info->max_uV)
- return -EINVAL;
-
- return volt_uV;
-}
-
static int da9052_list_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
+ int id = rdev_get_id(rdev);
int volt_uV;

- volt_uV = info->min_uV + info->step_uV * selector;
+ if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
+ && (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
+ volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
+ + info->min_uV);
+ volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
+ * (DA9052_BUCK_PERI_3uV_STEP);
+ } else {
+ volt_uV = (selector * info->step_uV) + info->min_uV;
+ }

if (volt_uV > info->max_uV)
return -EINVAL;
@@ -226,13 +213,13 @@ static int da9052_list_voltage(struct regulator_dev *rdev,
return volt_uV;
}

-static int da9052_regulator_set_voltage_int(struct regulator_dev *rdev,
+static int da9052_regulator_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned int *selector)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
- int offset = rdev_get_id(rdev);
+ int id = rdev_get_id(rdev);
int ret;

ret = verify_range(info, min_uV, max_uV);
@@ -242,113 +229,43 @@ static int da9052_regulator_set_voltage_int(struct regulator_dev *rdev,
if (min_uV < info->min_uV)
min_uV = info->min_uV;

- *selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
+ if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
+ && (min_uV >= DA9052_CONST_3uV)) {
+ *selector = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
+ DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
+ DA9052_BUCK_PERI_3uV_STEP);
+ } else {
+ *selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
+ }

ret = da9052_list_voltage(rdev, *selector);
if (ret < 0)
return ret;

- return da9052_reg_update(regulator->da9052,
- DA9052_BUCKCORE_REG + offset,
+ ret = da9052_reg_update(regulator->da9052,
+ DA9052_BUCKCORE_REG + id,
(1 << info->volt_shift) - 1, *selector);
-}
-
-static int da9052_set_ldo_voltage(struct regulator_dev *rdev,
- int min_uV, int max_uV,
- unsigned int *selector)
-{
- return da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
-}
-
-static int da9052_set_ldo5_6_voltage(struct regulator_dev *rdev,
- int min_uV, int max_uV,
- unsigned int *selector)
-{
- struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
- struct da9052_regulator_info *info = regulator->info;
- int ret;
-
- ret = da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
if (ret < 0)
return ret;

- /* Some LDOs are DVC controlled which requires enabling of
- * the LDO activate bit to implment the changes on the
- * LDO output.
- */
- return da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
- info->activate_bit, info->activate_bit);
-}
-
-static int da9052_set_dcdc_voltage(struct regulator_dev *rdev,
- int min_uV, int max_uV,
- unsigned int *selector)
-{
- struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
- struct da9052_regulator_info *info = regulator->info;
- int ret;
-
- ret = da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
- if (ret < 0)
- return ret;
-
- /* Some DCDCs are DVC controlled which requires enabling of
- * the DCDC activate bit to implment the changes on the
- * DCDC output.
- */
- return da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
- info->activate_bit, info->activate_bit);
-}
-
-static int da9052_get_regulator_voltage_sel(struct regulator_dev *rdev)
-{
- struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
- struct da9052_regulator_info *info = regulator->info;
- int offset = rdev_get_id(rdev);
- int ret;
-
- ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
- if (ret < 0)
- return ret;
-
- ret &= ((1 << info->volt_shift) - 1);
+ /* Some LDOs and DCDCs are DVC controlled which requires enabling of
+ * the activate bit to implment the changes on the output.
+ */
+ switch (id) {
+ case DA9052_ID_BUCK1:
+ case DA9052_ID_BUCK2:
+ case DA9052_ID_BUCK3:
+ case DA9052_ID_LDO2:
+ case DA9052_ID_LDO3:
+ ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
+ info->activate_bit, info->activate_bit);
+ break;
+ }

return ret;
}

-static int da9052_set_buckperi_voltage(struct regulator_dev *rdev, int min_uV,
- int max_uV, unsigned int *selector)
-{
- struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
- struct da9052_regulator_info *info = regulator->info;
- int offset = rdev_get_id(rdev);
- int ret;
-
- ret = verify_range(info, min_uV, max_uV);
- if (ret < 0)
- return ret;
-
- if (min_uV < info->min_uV)
- min_uV = info->min_uV;
-
- if ((regulator->da9052->chip_id == DA9052) &&
- (min_uV >= DA9052_CONST_3uV))
- *selector = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
- DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
- DA9052_BUCK_PERI_3uV_STEP);
- else
- *selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
-
- ret = da9052_list_buckperi_voltage(rdev, *selector);
- if (ret < 0)
- return ret;
-
- return da9052_reg_update(regulator->da9052,
- DA9052_BUCKCORE_REG + offset,
- (1 << info->volt_shift) - 1, *selector);
-}
-
-static int da9052_get_buckperi_voltage_sel(struct regulator_dev *rdev)
+static int da9052_get_regulator_voltage_sel(struct regulator_dev *rdev)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
@@ -364,21 +281,8 @@ static int da9052_get_buckperi_voltage_sel(struct regulator_dev *rdev)
return ret;
}

-static struct regulator_ops da9052_buckperi_ops = {
- .list_voltage = da9052_list_buckperi_voltage,
- .get_voltage_sel = da9052_get_buckperi_voltage_sel,
- .set_voltage = da9052_set_buckperi_voltage,
-
- .get_current_limit = da9052_dcdc_get_current_limit,
- .set_current_limit = da9052_dcdc_set_current_limit,
-
- .is_enabled = da9052_regulator_is_enabled,
- .enable = da9052_regulator_enable,
- .disable = da9052_regulator_disable,
-};
-
static struct regulator_ops da9052_dcdc_ops = {
- .set_voltage = da9052_set_dcdc_voltage,
+ .set_voltage = da9052_regulator_set_voltage,
.get_current_limit = da9052_dcdc_get_current_limit,
.set_current_limit = da9052_dcdc_set_current_limit,

@@ -389,18 +293,8 @@ static struct regulator_ops da9052_dcdc_ops = {
.disable = da9052_regulator_disable,
};

-static struct regulator_ops da9052_ldo5_6_ops = {
- .set_voltage = da9052_set_ldo5_6_voltage,
-
- .list_voltage = da9052_list_voltage,
- .get_voltage_sel = da9052_get_regulator_voltage_sel,
- .is_enabled = da9052_regulator_is_enabled,
- .enable = da9052_regulator_enable,
- .disable = da9052_regulator_disable,
-};
-
static struct regulator_ops da9052_ldo_ops = {
- .set_voltage = da9052_set_ldo_voltage,
+ .set_voltage = da9052_regulator_set_voltage,

.list_voltage = da9052_list_voltage,
.get_voltage_sel = da9052_get_regulator_voltage_sel,
@@ -409,24 +303,6 @@ static struct regulator_ops da9052_ldo_ops = {
.disable = da9052_regulator_disable,
};

-#define DA9052_LDO5_6(_id, step, min, max, sbits, ebits, abits) \
-{\
- .reg_desc = {\
- .name = #_id,\
- .ops = &da9052_ldo5_6_ops,\
- .type = REGULATOR_VOLTAGE,\
- .id = DA9052_ID_##_id,\
- .n_voltages = (max - min) / step + 1, \
- .owner = THIS_MODULE,\
- },\
- .min_uV = (min) * 1000,\
- .max_uV = (max) * 1000,\
- .step_uV = (step) * 1000,\
- .volt_shift = (sbits),\
- .en_bit = (ebits),\
- .activate_bit = (abits),\
-}
-
#define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \
{\
.reg_desc = {\
@@ -463,32 +339,14 @@ static struct regulator_ops da9052_ldo_ops = {
.activate_bit = (abits),\
}

-#define DA9052_BUCKPERI(_id, step, min, max, sbits, ebits, abits) \
-{\
- .reg_desc = {\
- .name = #_id,\
- .ops = &da9052_buckperi_ops,\
- .type = REGULATOR_VOLTAGE,\
- .id = DA9052_ID_##_id,\
- .n_voltages = (max - min) / step + 1, \
- .owner = THIS_MODULE,\
- },\
- .min_uV = (min) * 1000,\
- .max_uV = (max) * 1000,\
- .step_uV = (step) * 1000,\
- .volt_shift = (sbits),\
- .en_bit = (ebits),\
- .activate_bit = (abits),\
-}
-
static struct da9052_regulator_info da9052_regulator_info[] = {
DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
- DA9052_BUCKPERI(BUCK4, 50, 1800, 3600, 5, 6, 0),
+ DA9052_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0),
DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
- DA9052_LDO5_6(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
- DA9052_LDO5_6(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
+ DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
+ DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
@@ -502,10 +360,10 @@ static struct da9052_regulator_info da9053_regulator_info[] = {
DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
- DA9052_BUCKPERI(BUCK4, 25, 925, 2500, 6, 6, 0),
+ DA9052_DCDC(BUCK4, 25, 925, 2500, 6, 6, 0),
DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
- DA9052_LDO5_6(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
- DA9052_LDO5_6(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
+ DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
+ DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
--
1.7.5.4




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