regulator: lp87565: Add support for lp87565 PMIC regulators (f0168a9b) · Commits · 戴 / test

drivers/regulator/Kconfig

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		@@ -365,6 +365,14 @@ config REGULATOR_LP8755
		chip contains six step-down DC/DC converters which can support
		9 mode multiphase configuration.

		config REGULATOR_LP87565
		tristate "TI LP87565 Power regulators"
		depends on MFD_TI_LP87565 && OF
		help
		This driver supports LP87565 voltage regulator chips. LP87565
		provides four step-down converters. It supports software based
		voltage control for different voltage domains

		config REGULATOR_LP8788
		tristate "TI LP8788 Power Regulators"
		depends on MFD_LP8788

drivers/regulator/Makefile

+1 −0

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		@@ -46,6 +46,7 @@ obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o
		obj-$(CONFIG_REGULATOR_LP3972) += lp3972.o
		obj-$(CONFIG_REGULATOR_LP872X) += lp872x.o
		obj-$(CONFIG_REGULATOR_LP873X) += lp873x-regulator.o
		obj-$(CONFIG_REGULATOR_LP87565) += lp87565-regulator.o
		obj-$(CONFIG_REGULATOR_LP8788) += lp8788-buck.o
		obj-$(CONFIG_REGULATOR_LP8788) += lp8788-ldo.o
		obj-$(CONFIG_REGULATOR_LP8755) += lp8755.o

drivers/regulator/lp87565-regulator.c

0 → 100644

+237 −0

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		/*
		* 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, &regulators[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");

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