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Release 4.14 drivers/regulator/bcm590xx-regulator.c

/*
 * Broadcom BCM590xx regulator driver
 *
 * Copyright 2014 Linaro Limited
 * Author: Matt Porter <mporter@linaro.org>
 *
 * 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/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mfd/bcm590xx.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/slab.h>

/* I2C slave 0 registers */

#define BCM590XX_RFLDOPMCTRL1	0x60

#define BCM590XX_IOSR1PMCTRL1	0x7a

#define BCM590XX_IOSR2PMCTRL1	0x7c

#define BCM590XX_CSRPMCTRL1	0x7e

#define BCM590XX_SDSR1PMCTRL1	0x82

#define BCM590XX_SDSR2PMCTRL1	0x86

#define BCM590XX_MSRPMCTRL1	0x8a

#define BCM590XX_VSRPMCTRL1	0x8e

#define BCM590XX_RFLDOCTRL	0x96

#define BCM590XX_CSRVOUT1	0xc0

/* I2C slave 1 registers */

#define BCM590XX_GPLDO5PMCTRL1	0x16

#define BCM590XX_GPLDO6PMCTRL1	0x18

#define BCM590XX_GPLDO1CTRL	0x1a

#define BCM590XX_GPLDO2CTRL	0x1b

#define BCM590XX_GPLDO3CTRL	0x1c

#define BCM590XX_GPLDO4CTRL	0x1d

#define BCM590XX_GPLDO5CTRL	0x1e

#define BCM590XX_GPLDO6CTRL	0x1f

#define BCM590XX_OTG_CTRL	0x40

#define BCM590XX_GPLDO1PMCTRL1	0x57

#define BCM590XX_GPLDO2PMCTRL1	0x59

#define BCM590XX_GPLDO3PMCTRL1	0x5b

#define BCM590XX_GPLDO4PMCTRL1	0x5d


#define BCM590XX_REG_ENABLE	BIT(7)

#define BCM590XX_VBUS_ENABLE	BIT(2)

#define BCM590XX_LDO_VSEL_MASK	GENMASK(5, 3)

#define BCM590XX_SR_VSEL_MASK	GENMASK(5, 0)

/*
 * RFLDO to VSR regulators are
 * accessed via I2C slave 0
 */

/* LDO regulator IDs */

#define BCM590XX_REG_RFLDO	0

#define BCM590XX_REG_CAMLDO1	1

#define BCM590XX_REG_CAMLDO2	2

#define BCM590XX_REG_SIMLDO1	3

#define BCM590XX_REG_SIMLDO2	4

#define BCM590XX_REG_SDLDO	5

#define BCM590XX_REG_SDXLDO	6

#define BCM590XX_REG_MMCLDO1	7

#define BCM590XX_REG_MMCLDO2	8

#define BCM590XX_REG_AUDLDO	9

#define BCM590XX_REG_MICLDO	10

#define BCM590XX_REG_USBLDO	11

#define BCM590XX_REG_VIBLDO	12

/* DCDC regulator IDs */

#define BCM590XX_REG_CSR	13

#define BCM590XX_REG_IOSR1	14

#define BCM590XX_REG_IOSR2	15

#define BCM590XX_REG_MSR	16

#define BCM590XX_REG_SDSR1	17

#define BCM590XX_REG_SDSR2	18

#define BCM590XX_REG_VSR	19

/*
 * GPLDO1 to VBUS regulators are
 * accessed via I2C slave 1
 */


#define BCM590XX_REG_GPLDO1	20

#define BCM590XX_REG_GPLDO2	21

#define BCM590XX_REG_GPLDO3	22

#define BCM590XX_REG_GPLDO4	23

#define BCM590XX_REG_GPLDO5	24

#define BCM590XX_REG_GPLDO6	25

#define BCM590XX_REG_VBUS	26


#define BCM590XX_NUM_REGS	27


#define BCM590XX_REG_IS_LDO(n)	(n < BCM590XX_REG_CSR)

#define BCM590XX_REG_IS_GPLDO(n) \
	((n > BCM590XX_REG_VSR) && (n < BCM590XX_REG_VBUS))

#define BCM590XX_REG_IS_VBUS(n)	(n == BCM590XX_REG_VBUS)


struct bcm590xx_board {
	
struct regulator_init_data *bcm590xx_pmu_init_data[BCM590XX_NUM_REGS];
};

/* LDO group A: supported voltages in microvolts */

static const unsigned int ldo_a_table[] = {
	1200000, 1800000, 2500000, 2700000, 2800000,
	2900000, 3000000, 3300000,
};

/* LDO group C: supported voltages in microvolts */

static const unsigned int ldo_c_table[] = {
	3100000, 1800000, 2500000, 2700000, 2800000,
	2900000, 3000000, 3300000,
};


static const unsigned int ldo_vbus[] = {
	5000000,
};

/* DCDC group CSR: supported voltages in microvolts */

static const struct regulator_linear_range dcdc_csr_ranges[] = {
	REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
	REGULATOR_LINEAR_RANGE(1360000, 51, 55, 20000),
	REGULATOR_LINEAR_RANGE(900000, 56, 63, 0),
};

/* DCDC group IOSR1: supported voltages in microvolts */

static const struct regulator_linear_range dcdc_iosr1_ranges[] = {
	REGULATOR_LINEAR_RANGE(860000, 2, 51, 10000),
	REGULATOR_LINEAR_RANGE(1500000, 52, 52, 0),
	REGULATOR_LINEAR_RANGE(1800000, 53, 53, 0),
	REGULATOR_LINEAR_RANGE(900000, 54, 63, 0),
};

/* DCDC group SDSR1: supported voltages in microvolts */

static const struct regulator_linear_range dcdc_sdsr1_ranges[] = {
	REGULATOR_LINEAR_RANGE(860000, 2, 50, 10000),
	REGULATOR_LINEAR_RANGE(1340000, 51, 51, 0),
	REGULATOR_LINEAR_RANGE(900000, 52, 63, 0),
};


struct bcm590xx_info {
	
const char *name;
	
const char *vin_name;
	
u8 n_voltages;
	
const unsigned int *volt_table;
	
u8 n_linear_ranges;
	
const struct regulator_linear_range *linear_ranges;
};


#define BCM590XX_REG_TABLE(_name, _table) \
	{ \
                .name = #_name, \
                .n_voltages = ARRAY_SIZE(_table), \
                .volt_table = _table, \
        }


#define BCM590XX_REG_RANGES(_name, _ranges) \
	{ \
                .name = #_name, \
                .n_voltages = 64, \
                .n_linear_ranges = ARRAY_SIZE(_ranges), \
                .linear_ranges = _ranges, \
        }


static struct bcm590xx_info bcm590xx_regs[] = {
	BCM590XX_REG_TABLE(rfldo, ldo_a_table),
	BCM590XX_REG_TABLE(camldo1, ldo_c_table),
	BCM590XX_REG_TABLE(camldo2, ldo_c_table),
	BCM590XX_REG_TABLE(simldo1, ldo_a_table),
	BCM590XX_REG_TABLE(simldo2, ldo_a_table),
	BCM590XX_REG_TABLE(sdldo, ldo_c_table),
	BCM590XX_REG_TABLE(sdxldo, ldo_a_table),
	BCM590XX_REG_TABLE(mmcldo1, ldo_a_table),
	BCM590XX_REG_TABLE(mmcldo2, ldo_a_table),
	BCM590XX_REG_TABLE(audldo, ldo_a_table),
	BCM590XX_REG_TABLE(micldo, ldo_a_table),
	BCM590XX_REG_TABLE(usbldo, ldo_a_table),
	BCM590XX_REG_TABLE(vibldo, ldo_c_table),
	BCM590XX_REG_RANGES(csr, dcdc_csr_ranges),
	BCM590XX_REG_RANGES(iosr1, dcdc_iosr1_ranges),
	BCM590XX_REG_RANGES(iosr2, dcdc_iosr1_ranges),
	BCM590XX_REG_RANGES(msr, dcdc_iosr1_ranges),
	BCM590XX_REG_RANGES(sdsr1, dcdc_sdsr1_ranges),
	BCM590XX_REG_RANGES(sdsr2, dcdc_iosr1_ranges),
	BCM590XX_REG_RANGES(vsr, dcdc_iosr1_ranges),
	BCM590XX_REG_TABLE(gpldo1, ldo_a_table),
	BCM590XX_REG_TABLE(gpldo2, ldo_a_table),
	BCM590XX_REG_TABLE(gpldo3, ldo_a_table),
	BCM590XX_REG_TABLE(gpldo4, ldo_a_table),
	BCM590XX_REG_TABLE(gpldo5, ldo_a_table),
	BCM590XX_REG_TABLE(gpldo6, ldo_a_table),
	BCM590XX_REG_TABLE(vbus, ldo_vbus),
};


struct bcm590xx_reg {
	
struct regulator_desc *desc;
	
struct bcm590xx *mfd;
};


static int bcm590xx_get_vsel_register(int id) { if (BCM590XX_REG_IS_LDO(id)) return BCM590XX_RFLDOCTRL + id; else if (BCM590XX_REG_IS_GPLDO(id)) return BCM590XX_GPLDO1CTRL + id; else return BCM590XX_CSRVOUT1 + (id - BCM590XX_REG_CSR) * 3; }

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static int bcm590xx_get_enable_register(int id) { int reg = 0; if (BCM590XX_REG_IS_LDO(id)) reg = BCM590XX_RFLDOPMCTRL1 + id * 2; else if (BCM590XX_REG_IS_GPLDO(id)) reg = BCM590XX_GPLDO1PMCTRL1 + id * 2; else switch (id) { case BCM590XX_REG_CSR: reg = BCM590XX_CSRPMCTRL1; break; case BCM590XX_REG_IOSR1: reg = BCM590XX_IOSR1PMCTRL1; break; case BCM590XX_REG_IOSR2: reg = BCM590XX_IOSR2PMCTRL1; break; case BCM590XX_REG_MSR: reg = BCM590XX_MSRPMCTRL1; break; case BCM590XX_REG_SDSR1: reg = BCM590XX_SDSR1PMCTRL1; break; case BCM590XX_REG_SDSR2: reg = BCM590XX_SDSR2PMCTRL1; break; case BCM590XX_REG_VBUS: reg = BCM590XX_OTG_CTRL; } return reg; }

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static const struct regulator_ops bcm590xx_ops_ldo = { .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_table, .map_voltage = regulator_map_voltage_iterate, }; static const struct regulator_ops bcm590xx_ops_dcdc = { .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, }; static const struct regulator_ops bcm590xx_ops_vbus = { .is_enabled = regulator_is_enabled_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, }; #define BCM590XX_MATCH(_name, _id) \ { \ .name = #_name, \ .driver_data = (void *)&bcm590xx_regs[BCM590XX_REG_##_id], \ } static struct of_regulator_match bcm590xx_matches[] = { BCM590XX_MATCH(rfldo, RFLDO), BCM590XX_MATCH(camldo1, CAMLDO1), BCM590XX_MATCH(camldo2, CAMLDO2), BCM590XX_MATCH(simldo1, SIMLDO1), BCM590XX_MATCH(simldo2, SIMLDO2), BCM590XX_MATCH(sdldo, SDLDO), BCM590XX_MATCH(sdxldo, SDXLDO), BCM590XX_MATCH(mmcldo1, MMCLDO1), BCM590XX_MATCH(mmcldo2, MMCLDO2), BCM590XX_MATCH(audldo, AUDLDO), BCM590XX_MATCH(micldo, MICLDO), BCM590XX_MATCH(usbldo, USBLDO), BCM590XX_MATCH(vibldo, VIBLDO), BCM590XX_MATCH(csr, CSR), BCM590XX_MATCH(iosr1, IOSR1), BCM590XX_MATCH(iosr2, IOSR2), BCM590XX_MATCH(msr, MSR), BCM590XX_MATCH(sdsr1, SDSR1), BCM590XX_MATCH(sdsr2, SDSR2), BCM590XX_MATCH(vsr, VSR), BCM590XX_MATCH(gpldo1, GPLDO1), BCM590XX_MATCH(gpldo2, GPLDO2), BCM590XX_MATCH(gpldo3, GPLDO3), BCM590XX_MATCH(gpldo4, GPLDO4), BCM590XX_MATCH(gpldo5, GPLDO5), BCM590XX_MATCH(gpldo6, GPLDO6), BCM590XX_MATCH(vbus, VBUS), };
static struct bcm590xx_board *bcm590xx_parse_dt_reg_data( struct platform_device *pdev, struct of_regulator_match **bcm590xx_reg_matches) { struct bcm590xx_board *data; struct device_node *np = pdev->dev.parent->of_node; struct device_node *regulators; struct of_regulator_match *matches = bcm590xx_matches; int count = ARRAY_SIZE(bcm590xx_matches); int idx = 0; int ret; if (!np) { dev_err(&pdev->dev, "of node not found\n"); return NULL; } data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) return NULL; np = of_node_get(np); regulators = of_get_child_by_name(np, "regulators"); if (!regulators) { dev_warn(&pdev->dev, "regulator node not found\n"); return NULL; } ret = of_regulator_match(&pdev->dev, regulators, matches, count); of_node_put(regulators); if (ret < 0) { dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", ret); return NULL; } *bcm590xx_reg_matches = matches; for (idx = 0; idx < count; idx++) { if (!matches[idx].init_data || !matches[idx].of_node) continue; data->bcm590xx_pmu_init_data[idx] = matches[idx].init_data; } return data; }

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static int bcm590xx_probe(struct platform_device *pdev) { struct bcm590xx *bcm590xx = dev_get_drvdata(pdev->dev.parent); struct bcm590xx_board *pmu_data = NULL; struct bcm590xx_reg *pmu; struct regulator_config config = { }; struct bcm590xx_info *info; struct regulator_init_data *reg_data; struct regulator_dev *rdev; struct of_regulator_match *bcm590xx_reg_matches = NULL; int i; pmu_data = bcm590xx_parse_dt_reg_data(pdev, &bcm590xx_reg_matches); pmu = devm_kzalloc(&pdev->dev, sizeof(*pmu), GFP_KERNEL); if (!pmu) return -ENOMEM; pmu->mfd = bcm590xx; platform_set_drvdata(pdev, pmu); pmu->desc = devm_kzalloc(&pdev->dev, BCM590XX_NUM_REGS * sizeof(struct regulator_desc), GFP_KERNEL); if (!pmu->desc) return -ENOMEM; info = bcm590xx_regs; for (i = 0; i < BCM590XX_NUM_REGS; i++, info++) { if (pmu_data) reg_data = pmu_data->bcm590xx_pmu_init_data[i]; else reg_data = NULL; /* Register the regulators */ pmu->desc[i].name = info->name; pmu->desc[i].supply_name = info->vin_name; pmu->desc[i].id = i; pmu->desc[i].volt_table = info->volt_table; pmu->desc[i].n_voltages = info->n_voltages; pmu->desc[i].linear_ranges = info->linear_ranges; pmu->desc[i].n_linear_ranges = info->n_linear_ranges; if ((BCM590XX_REG_IS_LDO(i)) || (BCM590XX_REG_IS_GPLDO(i))) { pmu->desc[i].ops = &bcm590xx_ops_ldo; pmu->desc[i].vsel_mask = BCM590XX_LDO_VSEL_MASK; } else if (BCM590XX_REG_IS_VBUS(i)) pmu->desc[i].ops = &bcm590xx_ops_vbus; else { pmu->desc[i].ops = &bcm590xx_ops_dcdc; pmu->desc[i].vsel_mask = BCM590XX_SR_VSEL_MASK; } if (BCM590XX_REG_IS_VBUS(i)) pmu->desc[i].enable_mask = BCM590XX_VBUS_ENABLE; else { pmu->desc[i].vsel_reg = bcm590xx_get_vsel_register(i); pmu->desc[i].enable_is_inverted = true; pmu->desc[i].enable_mask = BCM590XX_REG_ENABLE; } pmu->desc[i].enable_reg = bcm590xx_get_enable_register(i); pmu->desc[i].type = REGULATOR_VOLTAGE; pmu->desc[i].owner = THIS_MODULE; config.dev = bcm590xx->dev; config.init_data = reg_data; config.driver_data = pmu; if (BCM590XX_REG_IS_GPLDO(i) || BCM590XX_REG_IS_VBUS(i)) config.regmap = bcm590xx->regmap_sec; else config.regmap = bcm590xx->regmap_pri; if (bcm590xx_reg_matches) config.of_node = bcm590xx_reg_matches[i].of_node; rdev = devm_regulator_register(&pdev->dev, &pmu->desc[i], &config); if (IS_ERR(rdev)) { dev_err(bcm590xx->dev, "failed to register %s regulator\n", pdev->name); return PTR_ERR(rdev); } } return 0; }

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static struct platform_driver bcm590xx_regulator_driver = { .driver = { .name = "bcm590xx-vregs", }, .probe = bcm590xx_probe, }; module_platform_driver(bcm590xx_regulator_driver); MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); MODULE_DESCRIPTION("BCM590xx voltage regulator driver"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:bcm590xx-vregs");

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