160 lines
3.9 KiB
C
160 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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// Copyright Axis Communications AB
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/driver.h>
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#include <dt-bindings/regulator/ti,tps62864.h>
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#define TPS6286X_VOUT1 0x01
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#define TPS6286X_VOUT1_VO1_SET GENMASK(7, 0)
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#define TPS6286X_CONTROL 0x03
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#define TPS6286X_CONTROL_FPWM BIT(4)
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#define TPS6286X_CONTROL_SWEN BIT(5)
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#define TPS6286X_MIN_MV 400
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#define TPS6286X_MAX_MV 1675
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#define TPS6286X_STEP_MV 5
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static const struct regmap_config tps6286x_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static int tps6286x_set_mode(struct regulator_dev *rdev, unsigned int mode)
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{
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unsigned int val;
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switch (mode) {
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case REGULATOR_MODE_NORMAL:
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val = 0;
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break;
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case REGULATOR_MODE_FAST:
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val = TPS6286X_CONTROL_FPWM;
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break;
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default:
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return -EINVAL;
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}
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return regmap_update_bits(rdev->regmap, TPS6286X_CONTROL,
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TPS6286X_CONTROL_FPWM, val);
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}
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static unsigned int tps6286x_get_mode(struct regulator_dev *rdev)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, TPS6286X_CONTROL, &val);
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if (ret < 0)
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return 0;
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return (val & TPS6286X_CONTROL_FPWM) ? REGULATOR_MODE_FAST : REGULATOR_MODE_NORMAL;
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}
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static const struct regulator_ops tps6286x_regulator_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.set_mode = tps6286x_set_mode,
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.get_mode = tps6286x_get_mode,
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.is_enabled = regulator_is_enabled_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.list_voltage = regulator_list_voltage_linear,
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};
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static unsigned int tps6286x_of_map_mode(unsigned int mode)
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{
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switch (mode) {
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case TPS62864_MODE_NORMAL:
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return REGULATOR_MODE_NORMAL;
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case TPS62864_MODE_FPWM:
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return REGULATOR_MODE_FAST;
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default:
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return REGULATOR_MODE_INVALID;
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}
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}
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static const struct regulator_desc tps6286x_reg = {
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.name = "tps6286x",
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.of_match = of_match_ptr("SW"),
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.owner = THIS_MODULE,
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.ops = &tps6286x_regulator_ops,
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.of_map_mode = tps6286x_of_map_mode,
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.regulators_node = of_match_ptr("regulators"),
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.type = REGULATOR_VOLTAGE,
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.n_voltages = ((TPS6286X_MAX_MV - TPS6286X_MIN_MV) / TPS6286X_STEP_MV) + 1,
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.min_uV = TPS6286X_MIN_MV * 1000,
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.uV_step = TPS6286X_STEP_MV * 1000,
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.vsel_reg = TPS6286X_VOUT1,
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.vsel_mask = TPS6286X_VOUT1_VO1_SET,
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.enable_reg = TPS6286X_CONTROL,
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.enable_mask = TPS6286X_CONTROL_SWEN,
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.ramp_delay = 1000,
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/* tDelay + tRamp, rounded up */
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.enable_time = 3000,
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};
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static const struct of_device_id tps6286x_dt_ids[] = {
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{ .compatible = "ti,tps62864", },
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{ .compatible = "ti,tps62866", },
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{ .compatible = "ti,tps62868", },
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{ .compatible = "ti,tps62869", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, tps6286x_dt_ids);
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static int tps6286x_i2c_probe(struct i2c_client *i2c)
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{
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struct device *dev = &i2c->dev;
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struct regulator_config config = {};
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struct regulator_dev *rdev;
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struct regmap *regmap;
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regmap = devm_regmap_init_i2c(i2c, &tps6286x_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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config.dev = &i2c->dev;
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config.of_node = dev->of_node;
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config.regmap = regmap;
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rdev = devm_regulator_register(&i2c->dev, &tps6286x_reg, &config);
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if (IS_ERR(rdev)) {
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dev_err(&i2c->dev, "Failed to register tps6286x regulator\n");
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return PTR_ERR(rdev);
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}
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return 0;
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}
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static const struct i2c_device_id tps6286x_i2c_id[] = {
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{ "tps62864", 0 },
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{ "tps62866", 0 },
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{ "tps62868", 0 },
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{ "tps62869", 0 },
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{},
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};
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MODULE_DEVICE_TABLE(i2c, tps6286x_i2c_id);
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static struct i2c_driver tps6286x_regulator_driver = {
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.driver = {
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.name = "tps6286x",
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.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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.of_match_table = of_match_ptr(tps6286x_dt_ids),
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},
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.probe_new = tps6286x_i2c_probe,
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.id_table = tps6286x_i2c_id,
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};
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module_i2c_driver(tps6286x_regulator_driver);
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MODULE_LICENSE("GPL v2");
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