summaryrefslogtreecommitdiff
path: root/drivers/regulator/da9052-regulator.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/regulator/da9052-regulator.c')
-rw-r--r--drivers/regulator/da9052-regulator.c486
1 files changed, 486 insertions, 0 deletions
diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
new file mode 100644
index 000000000..e628d4c2f
--- /dev/null
+++ b/drivers/regulator/da9052-regulator.c
@@ -0,0 +1,486 @@
+/*
+* da9052-regulator.c: Regulator driver for DA9052
+*
+* Copyright(c) 2011 Dialog Semiconductor Ltd.
+*
+* Author: David Dajun Chen <dchen@diasemi.com>
+*
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 2 of the License, or
+* (at your option) any later version.
+*
+*/
+
+#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>
+#ifdef CONFIG_OF
+#include <linux/of.h>
+#include <linux/regulator/of_regulator.h>
+#endif
+
+#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 = (new_sel - old_sel) * info->step_uV / 6250;
+ break;
+ }
+
+ return ret;
+}
+
+static 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 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, step, min, max, sbits, ebits, abits) \
+{\
+ .reg_desc = {\
+ .name = #_id,\
+ .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, step, min, max, sbits, ebits, abits) \
+{\
+ .reg_desc = {\
+ .name = #_id,\
+ .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, 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_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0),
+ DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
+ 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),
+ DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
+ DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
+ DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
+ DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
+};
+
+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_DCDC(BUCK4, 25, 925, 2500, 6, 6, 0),
+ DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
+ 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),
+ DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
+ DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
+ DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
+ DA9052_LDO(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:
+ 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 = &pdev->dev;
+ config.driver_data = regulator;
+ config.regmap = da9052->regmap;
+ if (pdata && pdata->regulators) {
+ config.init_data = pdata->regulators[cell->id];
+ } else {
+#ifdef CONFIG_OF
+ struct device_node *nproot = da9052->dev->of_node;
+ struct device_node *np;
+
+ if (!nproot)
+ return -ENODEV;
+
+ nproot = of_get_child_by_name(nproot, "regulators");
+ if (!nproot)
+ return -ENODEV;
+
+ for_each_child_of_node(nproot, np) {
+ if (!of_node_cmp(np->name,
+ regulator->info->reg_desc.name)) {
+ config.init_data = of_get_regulator_init_data(
+ &pdev->dev, np,
+ &regulator->info->reg_desc);
+ config.of_node = np;
+ break;
+ }
+ }
+ of_node_put(nproot);
+#endif
+ }
+
+ regulator->rdev = devm_regulator_register(&pdev->dev,
+ &regulator->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");