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- // SPDX-License-Identifier: GPL-2.0+
- //
- // da9052-regulator.c: Regulator driver for DA9052
- //
- // Copyright(c) 2011 Dialog Semiconductor Ltd.
- //
- // Author: David Dajun Chen <dchen@diasemi.com>
- #include <linux/module.h>
- #include <linux/moduleparam.h>
- #include <linux/init.h>
- #include <linux/err.h>
- #include <linux/platform_device.h>
- #include <linux/regulator/driver.h>
- #include <linux/regulator/machine.h>
- #include <linux/of.h>
- #include <linux/regulator/of_regulator.h>
- #include <linux/mfd/da9052/da9052.h>
- #include <linux/mfd/da9052/reg.h>
- #include <linux/mfd/da9052/pdata.h>
- /* Buck step size */
- #define DA9052_BUCK_PERI_3uV_STEP 100000
- #define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24
- #define DA9052_CONST_3uV 3000000
- #define DA9052_MIN_UA 0
- #define DA9052_MAX_UA 3
- #define DA9052_CURRENT_RANGE 4
- /* Bit masks */
- #define DA9052_BUCK_ILIM_MASK_EVEN 0x0c
- #define DA9052_BUCK_ILIM_MASK_ODD 0xc0
- /* DA9052 REGULATOR IDs */
- #define DA9052_ID_BUCK1 0
- #define DA9052_ID_BUCK2 1
- #define DA9052_ID_BUCK3 2
- #define DA9052_ID_BUCK4 3
- #define DA9052_ID_LDO1 4
- #define DA9052_ID_LDO2 5
- #define DA9052_ID_LDO3 6
- #define DA9052_ID_LDO4 7
- #define DA9052_ID_LDO5 8
- #define DA9052_ID_LDO6 9
- #define DA9052_ID_LDO7 10
- #define DA9052_ID_LDO8 11
- #define DA9052_ID_LDO9 12
- #define DA9052_ID_LDO10 13
- static const u32 da9052_current_limits[3][4] = {
- {700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */
- {1600000, 2000000, 2400000, 3000000}, /* DA9053-AA/Bx BUCK-CORE */
- {800000, 1000000, 1200000, 1500000}, /* DA9053-AA/Bx BUCK-PRO,
- * BUCK-MEM and BUCK-PERI
- */
- };
- struct da9052_regulator_info {
- struct regulator_desc reg_desc;
- int step_uV;
- int min_uV;
- int max_uV;
- unsigned char activate_bit;
- };
- struct da9052_regulator {
- struct da9052 *da9052;
- struct da9052_regulator_info *info;
- struct regulator_dev *rdev;
- };
- static int verify_range(struct da9052_regulator_info *info,
- int min_uV, int max_uV)
- {
- if (min_uV > info->max_uV || max_uV < info->min_uV)
- return -EINVAL;
- return 0;
- }
- static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
- {
- struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
- int offset = rdev_get_id(rdev);
- int ret, row = 2;
- ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
- if (ret < 0)
- return ret;
- /* Determine the even or odd position of the buck current limit
- * register field
- */
- if (offset % 2 == 0)
- ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
- else
- ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;
- /* Select the appropriate current limit range */
- if (regulator->da9052->chip_id == DA9052)
- row = 0;
- else if (offset == 0)
- row = 1;
- return da9052_current_limits[row][ret];
- }
- static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
- int max_uA)
- {
- struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
- int offset = rdev_get_id(rdev);
- int reg_val = 0;
- int i, row = 2;
- /* Select the appropriate current limit range */
- if (regulator->da9052->chip_id == DA9052)
- row = 0;
- else if (offset == 0)
- row = 1;
- for (i = DA9052_CURRENT_RANGE - 1; i >= 0; i--) {
- if ((min_uA <= da9052_current_limits[row][i]) &&
- (da9052_current_limits[row][i] <= max_uA)) {
- reg_val = i;
- break;
- }
- }
- if (i < 0)
- return -EINVAL;
- /* Determine the even or odd position of the buck current limit
- * register field
- */
- if (offset % 2 == 0)
- return da9052_reg_update(regulator->da9052,
- DA9052_BUCKA_REG + offset/2,
- DA9052_BUCK_ILIM_MASK_EVEN,
- reg_val << 2);
- else
- return da9052_reg_update(regulator->da9052,
- DA9052_BUCKA_REG + offset/2,
- DA9052_BUCK_ILIM_MASK_ODD,
- reg_val << 6);
- }
- 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;
- 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;
- return volt_uV;
- }
- static int da9052_map_voltage(struct regulator_dev *rdev,
- int min_uV, int max_uV)
- {
- struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
- struct da9052_regulator_info *info = regulator->info;
- int id = rdev_get_id(rdev);
- int ret, sel;
- 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 ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
- && (min_uV >= DA9052_CONST_3uV)) {
- sel = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
- DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
- DA9052_BUCK_PERI_3uV_STEP);
- } else {
- sel = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
- }
- ret = da9052_list_voltage(rdev, sel);
- if (ret < 0)
- return ret;
- return sel;
- }
- static int da9052_regulator_set_voltage_sel(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 ret;
- ret = da9052_reg_update(regulator->da9052, rdev->desc->vsel_reg,
- rdev->desc->vsel_mask, selector);
- if (ret < 0)
- return ret;
- /* 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_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
- unsigned int old_sel,
- unsigned int new_sel)
- {
- struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
- struct da9052_regulator_info *info = regulator->info;
- int id = rdev_get_id(rdev);
- int ret = 0;
- /* The DVC controlled LDOs and DCDCs ramp with 6.25mV/µs after enabling
- * the activate bit.
- */
- switch (id) {
- case DA9052_ID_BUCK1:
- case DA9052_ID_BUCK2:
- case DA9052_ID_BUCK3:
- case DA9052_ID_LDO2:
- case DA9052_ID_LDO3:
- ret = DIV_ROUND_UP(abs(new_sel - old_sel) * info->step_uV,
- 6250);
- break;
- }
- return ret;
- }
- static const struct regulator_ops da9052_dcdc_ops = {
- .get_current_limit = da9052_dcdc_get_current_limit,
- .set_current_limit = da9052_dcdc_set_current_limit,
- .list_voltage = da9052_list_voltage,
- .map_voltage = da9052_map_voltage,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = da9052_regulator_set_voltage_sel,
- .set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
- .is_enabled = regulator_is_enabled_regmap,
- .enable = regulator_enable_regmap,
- .disable = regulator_disable_regmap,
- };
- static const struct regulator_ops da9052_ldo_ops = {
- .list_voltage = da9052_list_voltage,
- .map_voltage = da9052_map_voltage,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = da9052_regulator_set_voltage_sel,
- .set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
- .is_enabled = regulator_is_enabled_regmap,
- .enable = regulator_enable_regmap,
- .disable = regulator_disable_regmap,
- };
- #define DA9052_LDO(_id, _name, step, min, max, sbits, ebits, abits) \
- {\
- .reg_desc = {\
- .name = #_name,\
- .of_match = of_match_ptr(#_name),\
- .regulators_node = of_match_ptr("regulators"),\
- .ops = &da9052_ldo_ops,\
- .type = REGULATOR_VOLTAGE,\
- .id = DA9052_ID_##_id,\
- .n_voltages = (max - min) / step + 1, \
- .owner = THIS_MODULE,\
- .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
- .vsel_mask = (1 << (sbits)) - 1,\
- .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
- .enable_mask = 1 << (ebits),\
- },\
- .min_uV = (min) * 1000,\
- .max_uV = (max) * 1000,\
- .step_uV = (step) * 1000,\
- .activate_bit = (abits),\
- }
- #define DA9052_DCDC(_id, _name, step, min, max, sbits, ebits, abits) \
- {\
- .reg_desc = {\
- .name = #_name,\
- .of_match = of_match_ptr(#_name),\
- .regulators_node = of_match_ptr("regulators"),\
- .ops = &da9052_dcdc_ops,\
- .type = REGULATOR_VOLTAGE,\
- .id = DA9052_ID_##_id,\
- .n_voltages = (max - min) / step + 1, \
- .owner = THIS_MODULE,\
- .vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
- .vsel_mask = (1 << (sbits)) - 1,\
- .enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
- .enable_mask = 1 << (ebits),\
- },\
- .min_uV = (min) * 1000,\
- .max_uV = (max) * 1000,\
- .step_uV = (step) * 1000,\
- .activate_bit = (abits),\
- }
- static struct da9052_regulator_info da9052_regulator_info[] = {
- DA9052_DCDC(BUCK1, buck1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
- DA9052_DCDC(BUCK2, buck2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
- DA9052_DCDC(BUCK3, buck3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO),
- DA9052_DCDC(BUCK4, buck4, 50, 1800, 3600, 5, 6, 0),
- DA9052_LDO(LDO1, ldo1, 50, 600, 1800, 5, 6, 0),
- DA9052_LDO(LDO2, ldo2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
- DA9052_LDO(LDO3, ldo3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
- DA9052_LDO(LDO4, ldo4, 25, 1725, 3300, 6, 6, 0),
- DA9052_LDO(LDO5, ldo5, 50, 1200, 3600, 6, 6, 0),
- DA9052_LDO(LDO6, ldo6, 50, 1200, 3600, 6, 6, 0),
- DA9052_LDO(LDO7, ldo7, 50, 1200, 3600, 6, 6, 0),
- DA9052_LDO(LDO8, ldo8, 50, 1200, 3600, 6, 6, 0),
- DA9052_LDO(LDO9, ldo9, 50, 1250, 3650, 6, 6, 0),
- DA9052_LDO(LDO10, ldo10, 50, 1200, 3600, 6, 6, 0),
- };
- static struct da9052_regulator_info da9053_regulator_info[] = {
- DA9052_DCDC(BUCK1, buck1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
- DA9052_DCDC(BUCK2, buck2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
- DA9052_DCDC(BUCK3, buck3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO),
- DA9052_DCDC(BUCK4, buck4, 25, 950, 2525, 6, 6, 0),
- DA9052_LDO(LDO1, ldo1, 50, 600, 1800, 5, 6, 0),
- DA9052_LDO(LDO2, ldo2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
- DA9052_LDO(LDO3, ldo3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
- DA9052_LDO(LDO4, ldo4, 25, 1725, 3300, 6, 6, 0),
- DA9052_LDO(LDO5, ldo5, 50, 1200, 3600, 6, 6, 0),
- DA9052_LDO(LDO6, ldo6, 50, 1200, 3600, 6, 6, 0),
- DA9052_LDO(LDO7, ldo7, 50, 1200, 3600, 6, 6, 0),
- DA9052_LDO(LDO8, ldo8, 50, 1200, 3600, 6, 6, 0),
- DA9052_LDO(LDO9, ldo9, 50, 1250, 3650, 6, 6, 0),
- DA9052_LDO(LDO10, ldo10, 50, 1200, 3600, 6, 6, 0),
- };
- static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
- int id)
- {
- struct da9052_regulator_info *info;
- int i;
- switch (chip_id) {
- case DA9052:
- for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
- info = &da9052_regulator_info[i];
- if (info->reg_desc.id == id)
- return info;
- }
- break;
- case DA9053_AA:
- case DA9053_BA:
- case DA9053_BB:
- case DA9053_BC:
- for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
- info = &da9053_regulator_info[i];
- if (info->reg_desc.id == id)
- return info;
- }
- break;
- }
- return NULL;
- }
- static int da9052_regulator_probe(struct platform_device *pdev)
- {
- const struct mfd_cell *cell = mfd_get_cell(pdev);
- struct regulator_config config = { };
- struct da9052_regulator *regulator;
- struct da9052 *da9052;
- struct da9052_pdata *pdata;
- regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
- GFP_KERNEL);
- if (!regulator)
- return -ENOMEM;
- da9052 = dev_get_drvdata(pdev->dev.parent);
- pdata = dev_get_platdata(da9052->dev);
- regulator->da9052 = da9052;
- regulator->info = find_regulator_info(regulator->da9052->chip_id,
- cell->id);
- if (regulator->info == NULL) {
- dev_err(&pdev->dev, "invalid regulator ID specified\n");
- return -EINVAL;
- }
- config.dev = da9052->dev;
- config.driver_data = regulator;
- config.regmap = da9052->regmap;
- if (pdata)
- config.init_data = pdata->regulators[cell->id];
- regulator->rdev = devm_regulator_register(&pdev->dev,
- ®ulator->info->reg_desc,
- &config);
- if (IS_ERR(regulator->rdev)) {
- dev_err(&pdev->dev, "failed to register regulator %s\n",
- regulator->info->reg_desc.name);
- return PTR_ERR(regulator->rdev);
- }
- platform_set_drvdata(pdev, regulator);
- return 0;
- }
- static struct platform_driver da9052_regulator_driver = {
- .probe = da9052_regulator_probe,
- .driver = {
- .name = "da9052-regulator",
- },
- };
- static int __init da9052_regulator_init(void)
- {
- return platform_driver_register(&da9052_regulator_driver);
- }
- subsys_initcall(da9052_regulator_init);
- static void __exit da9052_regulator_exit(void)
- {
- platform_driver_unregister(&da9052_regulator_driver);
- }
- module_exit(da9052_regulator_exit);
- MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
- MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
- MODULE_LICENSE("GPL");
- MODULE_ALIAS("platform:da9052-regulator");
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