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Diffstat (limited to 'drivers/regulator/tps6507x-regulator.c')
-rw-r--r--drivers/regulator/tps6507x-regulator.c460
1 files changed, 460 insertions, 0 deletions
diff --git a/drivers/regulator/tps6507x-regulator.c b/drivers/regulator/tps6507x-regulator.c
new file mode 100644
index 000000000..b83816ee6
--- /dev/null
+++ b/drivers/regulator/tps6507x-regulator.c
@@ -0,0 +1,460 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * tps6507x-regulator.c
+ *
+ * Regulator driver for TPS65073 PMIC
+ *
+ * Copyright (C) 2009 Texas Instrument Incorporated - https://www.ti.com/
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.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/regulator/tps6507x.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/mfd/tps6507x.h>
+#include <linux/regulator/of_regulator.h>
+
+/* DCDC's */
+#define TPS6507X_DCDC_1 0
+#define TPS6507X_DCDC_2 1
+#define TPS6507X_DCDC_3 2
+/* LDOs */
+#define TPS6507X_LDO_1 3
+#define TPS6507X_LDO_2 4
+
+#define TPS6507X_MAX_REG_ID TPS6507X_LDO_2
+
+/* Number of step-down converters available */
+#define TPS6507X_NUM_DCDC 3
+/* Number of LDO voltage regulators available */
+#define TPS6507X_NUM_LDO 2
+/* Number of total regulators available */
+#define TPS6507X_NUM_REGULATOR (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)
+
+/* Supported voltage values for regulators (in microVolts) */
+static const unsigned int VDCDCx_VSEL_table[] = {
+ 725000, 750000, 775000, 800000,
+ 825000, 850000, 875000, 900000,
+ 925000, 950000, 975000, 1000000,
+ 1025000, 1050000, 1075000, 1100000,
+ 1125000, 1150000, 1175000, 1200000,
+ 1225000, 1250000, 1275000, 1300000,
+ 1325000, 1350000, 1375000, 1400000,
+ 1425000, 1450000, 1475000, 1500000,
+ 1550000, 1600000, 1650000, 1700000,
+ 1750000, 1800000, 1850000, 1900000,
+ 1950000, 2000000, 2050000, 2100000,
+ 2150000, 2200000, 2250000, 2300000,
+ 2350000, 2400000, 2450000, 2500000,
+ 2550000, 2600000, 2650000, 2700000,
+ 2750000, 2800000, 2850000, 2900000,
+ 3000000, 3100000, 3200000, 3300000,
+};
+
+static const unsigned int LDO1_VSEL_table[] = {
+ 1000000, 1100000, 1200000, 1250000,
+ 1300000, 1350000, 1400000, 1500000,
+ 1600000, 1800000, 2500000, 2750000,
+ 2800000, 3000000, 3100000, 3300000,
+};
+
+/* The voltage mapping table for LDO2 is the same as VDCDCx */
+#define LDO2_VSEL_table VDCDCx_VSEL_table
+
+struct tps_info {
+ const char *name;
+ u8 table_len;
+ const unsigned int *table;
+
+ /* Does DCDC high or the low register defines output voltage? */
+ bool defdcdc_default;
+};
+
+static struct tps_info tps6507x_pmic_regs[] = {
+ {
+ .name = "VDCDC1",
+ .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
+ .table = VDCDCx_VSEL_table,
+ },
+ {
+ .name = "VDCDC2",
+ .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
+ .table = VDCDCx_VSEL_table,
+ },
+ {
+ .name = "VDCDC3",
+ .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
+ .table = VDCDCx_VSEL_table,
+ },
+ {
+ .name = "LDO1",
+ .table_len = ARRAY_SIZE(LDO1_VSEL_table),
+ .table = LDO1_VSEL_table,
+ },
+ {
+ .name = "LDO2",
+ .table_len = ARRAY_SIZE(LDO2_VSEL_table),
+ .table = LDO2_VSEL_table,
+ },
+};
+
+struct tps6507x_pmic {
+ struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
+ struct tps6507x_dev *mfd;
+ struct tps_info *info[TPS6507X_NUM_REGULATOR];
+ struct mutex io_lock;
+};
+static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
+{
+ u8 val;
+ int err;
+
+ err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
+
+ if (err)
+ return err;
+
+ return val;
+}
+
+static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
+{
+ return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
+}
+
+static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
+{
+ int err, data;
+
+ mutex_lock(&tps->io_lock);
+
+ data = tps6507x_pmic_read(tps, reg);
+ if (data < 0) {
+ dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
+ err = data;
+ goto out;
+ }
+
+ data |= mask;
+ err = tps6507x_pmic_write(tps, reg, data);
+ if (err)
+ dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
+
+out:
+ mutex_unlock(&tps->io_lock);
+ return err;
+}
+
+static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
+{
+ int err, data;
+
+ mutex_lock(&tps->io_lock);
+
+ data = tps6507x_pmic_read(tps, reg);
+ if (data < 0) {
+ dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
+ err = data;
+ goto out;
+ }
+
+ data &= ~mask;
+ err = tps6507x_pmic_write(tps, reg, data);
+ if (err)
+ dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
+
+out:
+ mutex_unlock(&tps->io_lock);
+ return err;
+}
+
+static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
+{
+ int data;
+
+ mutex_lock(&tps->io_lock);
+
+ data = tps6507x_pmic_read(tps, reg);
+ if (data < 0)
+ dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
+
+ mutex_unlock(&tps->io_lock);
+ return data;
+}
+
+static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
+{
+ int err;
+
+ mutex_lock(&tps->io_lock);
+
+ err = tps6507x_pmic_write(tps, reg, val);
+ if (err < 0)
+ dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
+
+ mutex_unlock(&tps->io_lock);
+ return err;
+}
+
+static int tps6507x_pmic_is_enabled(struct regulator_dev *dev)
+{
+ struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
+ int data, rid = rdev_get_id(dev);
+ u8 shift;
+
+ if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
+ return -EINVAL;
+
+ shift = TPS6507X_MAX_REG_ID - rid;
+ data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
+
+ if (data < 0)
+ return data;
+ else
+ return (data & 1<<shift) ? 1 : 0;
+}
+
+static int tps6507x_pmic_enable(struct regulator_dev *dev)
+{
+ struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
+ int rid = rdev_get_id(dev);
+ u8 shift;
+
+ if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
+ return -EINVAL;
+
+ shift = TPS6507X_MAX_REG_ID - rid;
+ return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
+}
+
+static int tps6507x_pmic_disable(struct regulator_dev *dev)
+{
+ struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
+ int rid = rdev_get_id(dev);
+ u8 shift;
+
+ if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
+ return -EINVAL;
+
+ shift = TPS6507X_MAX_REG_ID - rid;
+ return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
+ 1 << shift);
+}
+
+static int tps6507x_pmic_get_voltage_sel(struct regulator_dev *dev)
+{
+ struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
+ int data, rid = rdev_get_id(dev);
+ u8 reg, mask;
+
+ switch (rid) {
+ case TPS6507X_DCDC_1:
+ reg = TPS6507X_REG_DEFDCDC1;
+ mask = TPS6507X_DEFDCDCX_DCDC_MASK;
+ break;
+ case TPS6507X_DCDC_2:
+ if (tps->info[rid]->defdcdc_default)
+ reg = TPS6507X_REG_DEFDCDC2_HIGH;
+ else
+ reg = TPS6507X_REG_DEFDCDC2_LOW;
+ mask = TPS6507X_DEFDCDCX_DCDC_MASK;
+ break;
+ case TPS6507X_DCDC_3:
+ if (tps->info[rid]->defdcdc_default)
+ reg = TPS6507X_REG_DEFDCDC3_HIGH;
+ else
+ reg = TPS6507X_REG_DEFDCDC3_LOW;
+ mask = TPS6507X_DEFDCDCX_DCDC_MASK;
+ break;
+ case TPS6507X_LDO_1:
+ reg = TPS6507X_REG_LDO_CTRL1;
+ mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
+ break;
+ case TPS6507X_LDO_2:
+ reg = TPS6507X_REG_DEFLDO2;
+ mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ data = tps6507x_pmic_reg_read(tps, reg);
+ if (data < 0)
+ return data;
+
+ data &= mask;
+ return data;
+}
+
+static int tps6507x_pmic_set_voltage_sel(struct regulator_dev *dev,
+ unsigned selector)
+{
+ struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
+ int data, rid = rdev_get_id(dev);
+ u8 reg, mask;
+
+ switch (rid) {
+ case TPS6507X_DCDC_1:
+ reg = TPS6507X_REG_DEFDCDC1;
+ mask = TPS6507X_DEFDCDCX_DCDC_MASK;
+ break;
+ case TPS6507X_DCDC_2:
+ if (tps->info[rid]->defdcdc_default)
+ reg = TPS6507X_REG_DEFDCDC2_HIGH;
+ else
+ reg = TPS6507X_REG_DEFDCDC2_LOW;
+ mask = TPS6507X_DEFDCDCX_DCDC_MASK;
+ break;
+ case TPS6507X_DCDC_3:
+ if (tps->info[rid]->defdcdc_default)
+ reg = TPS6507X_REG_DEFDCDC3_HIGH;
+ else
+ reg = TPS6507X_REG_DEFDCDC3_LOW;
+ mask = TPS6507X_DEFDCDCX_DCDC_MASK;
+ break;
+ case TPS6507X_LDO_1:
+ reg = TPS6507X_REG_LDO_CTRL1;
+ mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
+ break;
+ case TPS6507X_LDO_2:
+ reg = TPS6507X_REG_DEFLDO2;
+ mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ data = tps6507x_pmic_reg_read(tps, reg);
+ if (data < 0)
+ return data;
+
+ data &= ~mask;
+ data |= selector;
+
+ return tps6507x_pmic_reg_write(tps, reg, data);
+}
+
+static const struct regulator_ops tps6507x_pmic_ops = {
+ .is_enabled = tps6507x_pmic_is_enabled,
+ .enable = tps6507x_pmic_enable,
+ .disable = tps6507x_pmic_disable,
+ .get_voltage_sel = tps6507x_pmic_get_voltage_sel,
+ .set_voltage_sel = tps6507x_pmic_set_voltage_sel,
+ .list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_ascend,
+};
+
+static int tps6507x_pmic_of_parse_cb(struct device_node *np,
+ const struct regulator_desc *desc,
+ struct regulator_config *config)
+{
+ struct tps6507x_pmic *tps = config->driver_data;
+ struct tps_info *info = tps->info[desc->id];
+ u32 prop;
+ int ret;
+
+ ret = of_property_read_u32(np, "ti,defdcdc_default", &prop);
+ if (!ret)
+ info->defdcdc_default = prop;
+
+ return 0;
+}
+
+static int tps6507x_pmic_probe(struct platform_device *pdev)
+{
+ struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
+ struct tps_info *info = &tps6507x_pmic_regs[0];
+ struct regulator_config config = { };
+ struct regulator_init_data *init_data = NULL;
+ struct regulator_dev *rdev;
+ struct tps6507x_pmic *tps;
+ struct tps6507x_board *tps_board;
+ int i;
+
+ /**
+ * tps_board points to pmic related constants
+ * coming from the board-evm file.
+ */
+
+ tps_board = dev_get_platdata(tps6507x_dev->dev);
+ if (tps_board)
+ init_data = tps_board->tps6507x_pmic_init_data;
+
+ tps = devm_kzalloc(&pdev->dev, sizeof(*tps), GFP_KERNEL);
+ if (!tps)
+ return -ENOMEM;
+
+ mutex_init(&tps->io_lock);
+
+ /* common for all regulators */
+ tps->mfd = tps6507x_dev;
+
+ for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++) {
+ /* Register the regulators */
+ tps->info[i] = info;
+ if (init_data && init_data[i].driver_data) {
+ struct tps6507x_reg_platform_data *data =
+ init_data[i].driver_data;
+ info->defdcdc_default = data->defdcdc_default;
+ }
+
+ tps->desc[i].name = info->name;
+ tps->desc[i].of_match = of_match_ptr(info->name);
+ tps->desc[i].regulators_node = of_match_ptr("regulators");
+ tps->desc[i].of_parse_cb = tps6507x_pmic_of_parse_cb;
+ tps->desc[i].id = i;
+ tps->desc[i].n_voltages = info->table_len;
+ tps->desc[i].volt_table = info->table;
+ tps->desc[i].ops = &tps6507x_pmic_ops;
+ tps->desc[i].type = REGULATOR_VOLTAGE;
+ tps->desc[i].owner = THIS_MODULE;
+
+ config.dev = tps6507x_dev->dev;
+ config.init_data = init_data;
+ config.driver_data = tps;
+
+ rdev = devm_regulator_register(&pdev->dev, &tps->desc[i],
+ &config);
+ if (IS_ERR(rdev)) {
+ dev_err(tps6507x_dev->dev,
+ "failed to register %s regulator\n",
+ pdev->name);
+ return PTR_ERR(rdev);
+ }
+ }
+
+ tps6507x_dev->pmic = tps;
+ platform_set_drvdata(pdev, tps6507x_dev);
+
+ return 0;
+}
+
+static struct platform_driver tps6507x_pmic_driver = {
+ .driver = {
+ .name = "tps6507x-pmic",
+ },
+ .probe = tps6507x_pmic_probe,
+};
+
+static int __init tps6507x_pmic_init(void)
+{
+ return platform_driver_register(&tps6507x_pmic_driver);
+}
+subsys_initcall(tps6507x_pmic_init);
+
+static void __exit tps6507x_pmic_cleanup(void)
+{
+ platform_driver_unregister(&tps6507x_pmic_driver);
+}
+module_exit(tps6507x_pmic_cleanup);
+
+MODULE_AUTHOR("Texas Instruments");
+MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:tps6507x-pmic");