cregit-Linux how code gets into the kernel

Release 4.14 drivers/regulator/lp87565-regulator.c

Directory: drivers/regulator
/*
 * 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;
}


Contributors
PersonTokensPropCommitsCommitProp
J Keerthy179100.00%1100.00%


Total179100.00%1100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
J Keerthy102100.00%1100.00%


Total102100.00%1100.00%






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;
}


Contributors
PersonTokensPropCommitsCommitProp
J Keerthy93100.00%1100.00%


Total93100.00%1100.00%



/* 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;
}


Contributors
PersonTokensPropCommitsCommitProp
J Keerthy174100.00%1100.00%


Total174100.00%1100.00%




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");

Overall Contributors
PersonTokensPropCommitsCommitProp
J Keerthy1012100.00%3100.00%


Total1012100.00%3100.00%


Directory: drivers/regulator



Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.