diff options
Diffstat (limited to 'drivers/regulator/lp87565-regulator.c')
| -rw-r--r-- | drivers/regulator/lp87565-regulator.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/drivers/regulator/lp87565-regulator.c b/drivers/regulator/lp87565-regulator.c new file mode 100644 index 000000000000..cfdbe294fb6a --- /dev/null +++ b/drivers/regulator/lp87565-regulator.c @@ -0,0 +1,236 @@ +/* + * Regulator driver for LP87565 PMIC + * + * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.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 version 2. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#include <linux/mfd/lp87565.h> + +#define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, _er, _em, \ + _delay, _lr, _cr) \ + [_id] = { \ + .desc = { \ + .name = _name, \ + .supply_name = _of "-in", \ + .id = _id, \ + .of_match = of_match_ptr(_of), \ + .regulators_node = of_match_ptr("regulators"),\ + .ops = &_ops, \ + .n_voltages = _n, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .vsel_reg = _vr, \ + .vsel_mask = _vm, \ + .enable_reg = _er, \ + .enable_mask = _em, \ + .ramp_delay = _delay, \ + .linear_ranges = _lr, \ + .n_linear_ranges = ARRAY_SIZE(_lr), \ + }, \ + .ctrl2_reg = _cr, \ + } + +struct lp87565_regulator { + struct regulator_desc desc; + unsigned int ctrl2_reg; +}; + +static const struct lp87565_regulator regulators[]; + +static const struct regulator_linear_range buck0_1_2_3_ranges[] = { + REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000), + REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000), + REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000), +}; + +static unsigned int lp87565_buck_ramp_delay[] = { + 30000, 15000, 10000, 7500, 3800, 1900, 940, 470 +}; + +/* LP87565 BUCK current limit */ +static const unsigned int lp87565_buck_uA[] = { + 1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000, +}; + +static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev, + int ramp_delay) +{ + int id = rdev_get_id(rdev); + struct lp87565 *lp87565 = rdev_get_drvdata(rdev); + unsigned int reg; + int ret; + + if (ramp_delay <= 470) + reg = 7; + else if (ramp_delay <= 940) + reg = 6; + else if (ramp_delay <= 1900) + reg = 5; + else if (ramp_delay <= 3800) + reg = 4; + else if (ramp_delay <= 7500) + reg = 3; + else if (ramp_delay <= 10000) + reg = 2; + else if (ramp_delay <= 15000) + reg = 1; + else + reg = 0; + + ret = regmap_update_bits(lp87565->regmap, regulators[id].ctrl2_reg, + LP87565_BUCK_CTRL_2_SLEW_RATE, + reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE)); + if (ret) { + dev_err(lp87565->dev, "SLEW RATE write failed: %d\n", ret); + return ret; + } + + rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg]; + + return 0; +} + +static int lp87565_buck_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + int id = rdev_get_id(rdev); + struct lp87565 *lp87565 = rdev_get_drvdata(rdev); + int i; + + for (i = ARRAY_SIZE(lp87565_buck_uA) - 1; i >= 0; i--) { + if (lp87565_buck_uA[i] >= min_uA && + lp87565_buck_uA[i] <= max_uA) + return regmap_update_bits(lp87565->regmap, + regulators[id].ctrl2_reg, + LP87565_BUCK_CTRL_2_ILIM, + i << __ffs(LP87565_BUCK_CTRL_2_ILIM)); + } + + return -EINVAL; +} + +static int lp87565_buck_get_current_limit(struct regulator_dev *rdev) +{ + int id = rdev_get_id(rdev); + struct lp87565 *lp87565 = rdev_get_drvdata(rdev); + int ret; + unsigned int val; + + ret = regmap_read(lp87565->regmap, regulators[id].ctrl2_reg, &val); + if (ret) + return ret; + + val = (val & LP87565_BUCK_CTRL_2_ILIM) >> + __ffs(LP87565_BUCK_CTRL_2_ILIM); + + return (val < ARRAY_SIZE(lp87565_buck_uA)) ? + lp87565_buck_uA[val] : -EINVAL; +} + +/* Operations permitted on BUCK0, BUCK1 */ +static struct regulator_ops lp87565_buck_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_ramp_delay = lp87565_buck_set_ramp_delay, + .set_current_limit = lp87565_buck_set_current_limit, + .get_current_limit = lp87565_buck_get_current_limit, +}; + +static const struct lp87565_regulator regulators[] = { + LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops, + 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, + LP87565_REG_BUCK0_CTRL_1, + LP87565_BUCK_CTRL_1_EN, 3800, + buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), + LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops, + 256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET, + LP87565_REG_BUCK1_CTRL_1, + LP87565_BUCK_CTRL_1_EN, 3800, + buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2), + LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops, + 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, + LP87565_REG_BUCK2_CTRL_1, + LP87565_BUCK_CTRL_1_EN, 3800, + buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), + LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops, + 256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET, + LP87565_REG_BUCK3_CTRL_1, + LP87565_BUCK_CTRL_1_EN, 3800, + buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2), + LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops, + 256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, + LP87565_REG_BUCK0_CTRL_1, + LP87565_BUCK_CTRL_1_EN, 3800, + buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), + LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops, + 256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, + LP87565_REG_BUCK2_CTRL_1, + LP87565_BUCK_CTRL_1_EN, 3800, + buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), +}; + +static int lp87565_regulator_probe(struct platform_device *pdev) +{ + struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent); + struct regulator_config config = { }; + struct regulator_dev *rdev; + int i, min_idx = LP87565_BUCK_1, max_idx = LP87565_BUCK_3; + + platform_set_drvdata(pdev, lp87565); + + config.dev = &pdev->dev; + config.dev->of_node = lp87565->dev->of_node; + config.driver_data = lp87565; + config.regmap = lp87565->regmap; + + if (lp87565->dev_type == LP87565_DEVICE_TYPE_LP87565_Q1) { + min_idx = LP87565_BUCK_10; + max_idx = LP87565_BUCK_23; + } + + for (i = min_idx; i <= max_idx; i++) { + rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, + &config); + if (IS_ERR(rdev)) { + dev_err(lp87565->dev, "failed to register %s regulator\n", + pdev->name); + return PTR_ERR(rdev); + } + } + + return 0; +} + +static const struct platform_device_id lp87565_regulator_id_table[] = { + { "lp87565-regulator", }, + { "lp87565-q1-regulator", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table); + +static struct platform_driver lp87565_regulator_driver = { + .driver = { + .name = "lp87565-pmic", + }, + .probe = lp87565_regulator_probe, + .id_table = lp87565_regulator_id_table, +}; +module_platform_driver(lp87565_regulator_driver); + +MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); +MODULE_DESCRIPTION("LP87565 voltage regulator driver"); +MODULE_LICENSE("GPL v2"); |