--- /dev/null
+/*
+ * 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; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#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(500000, 0x0, 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");
projects / platform / kernel / linux-starfive.git / commitdiff