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