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Release 4.10 drivers/regulator/pv88080-regulator.c

/*
 * pv88080-regulator.c - Regulator device driver for PV88080
 * Copyright (C) 2016  Powerventure Semiconductor Ltd.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regmap.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/regulator/of_regulator.h>
#include "pv88080-regulator.h"


#define PV88080_MAX_REGULATORS	4

/* PV88080 REGULATOR IDs */
enum {
	/* BUCKs */
	
PV88080_ID_BUCK1,
	
PV88080_ID_BUCK2,
	
PV88080_ID_BUCK3,
	
PV88080_ID_HVBUCK,
};


enum pv88080_types {
	
TYPE_PV88080_AA,
	
TYPE_PV88080_BA,
};


struct pv88080_regulator {
	
struct regulator_desc desc;
	/* Current limiting */
	
unsigned int n_current_limits;
	
const int *current_limits;
	
unsigned int limit_mask;
	
unsigned int mode_reg;
	
unsigned int limit_reg;
	
unsigned int conf2;
	
unsigned int conf5;
};


struct pv88080 {
	
struct device *dev;
	
struct regmap *regmap;
	
struct regulator_dev *rdev[PV88080_MAX_REGULATORS];
	
unsigned long type;
	
const struct pv88080_compatible_regmap *regmap_config;
};


struct pv88080_buck_voltage {
	
int min_uV;
	
int max_uV;
	
int uV_step;
};


struct pv88080_buck_regmap {
	/* REGS */
	
int buck_enable_reg;
	
int buck_vsel_reg;
	
int buck_mode_reg;
	
int buck_limit_reg;
	
int buck_vdac_range_reg;
	
int buck_vrange_gain_reg;
	/* MASKS */
	
int buck_enable_mask;
	
int buck_vsel_mask;
	
int buck_limit_mask;
};


struct pv88080_compatible_regmap {
	/* BUCK1, 2, 3 */
	
struct pv88080_buck_regmap buck_regmap[PV88080_MAX_REGULATORS-1];
	/* HVBUCK */
	
int hvbuck_enable_reg;
	
int hvbuck_vsel_reg;
	
int hvbuck_enable_mask;
	
int hvbuck_vsel_mask;
};


static const struct regmap_config pv88080_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
};

/* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.
 * Entry indexes corresponds to register values.
 */


static const int pv88080_buck1_limits[] = {
	3230000, 5130000, 6960000, 8790000
};


static const int pv88080_buck23_limits[] = {
	1496000, 2393000, 3291000, 4189000
};


static const struct pv88080_buck_voltage pv88080_buck_vol[2] = {
	{
		.min_uV = 600000,
		.max_uV = 1393750,
		.uV_step = 6250,
        },
	{
		.min_uV = 1400000,
		.max_uV = 2193750,
		.uV_step = 6250,
        },
};


static const struct pv88080_compatible_regmap pv88080_aa_regs = {
	/* BUCK1 */
	.buck_regmap[0] = {
		.buck_enable_reg      = PV88080AA_REG_BUCK1_CONF0,
		.buck_vsel_reg        = PV88080AA_REG_BUCK1_CONF0,
		.buck_mode_reg        = PV88080AA_REG_BUCK1_CONF1,
		.buck_limit_reg       = PV88080AA_REG_BUCK1_CONF1,
		.buck_vdac_range_reg  = PV88080AA_REG_BUCK1_CONF2,
		.buck_vrange_gain_reg = PV88080AA_REG_BUCK1_CONF5,
		.buck_enable_mask     = PV88080_BUCK1_EN,
		.buck_vsel_mask       = PV88080_VBUCK1_MASK,
		.buck_limit_mask      = PV88080_BUCK1_ILIM_MASK,
        },
	/* BUCK2 */
	.buck_regmap[1] = {
		.buck_enable_reg      = PV88080AA_REG_BUCK2_CONF0,
		.buck_vsel_reg        = PV88080AA_REG_BUCK2_CONF0,
		.buck_mode_reg        = PV88080AA_REG_BUCK2_CONF1,
		.buck_limit_reg	      = PV88080AA_REG_BUCK2_CONF1,
		.buck_vdac_range_reg  = PV88080AA_REG_BUCK2_CONF2,
		.buck_vrange_gain_reg = PV88080AA_REG_BUCK2_CONF5,
		.buck_enable_mask	  = PV88080_BUCK2_EN,
		.buck_vsel_mask       = PV88080_VBUCK2_MASK,
		.buck_limit_mask      = PV88080_BUCK2_ILIM_MASK,
        },
	/* BUCK3 */
	.buck_regmap[2] = {
		.buck_enable_reg	  = PV88080AA_REG_BUCK3_CONF0,
		.buck_vsel_reg        = PV88080AA_REG_BUCK3_CONF0,
		.buck_mode_reg        = PV88080AA_REG_BUCK3_CONF1,
		.buck_limit_reg	      = PV88080AA_REG_BUCK3_CONF1,
		.buck_vdac_range_reg  = PV88080AA_REG_BUCK3_CONF2,
		.buck_vrange_gain_reg = PV88080AA_REG_BUCK3_CONF5,
		.buck_enable_mask	  = PV88080_BUCK3_EN,
		.buck_vsel_mask       = PV88080_VBUCK3_MASK,
		.buck_limit_mask      = PV88080_BUCK3_ILIM_MASK,
        },
	/* HVBUCK */
	.hvbuck_enable_reg	      = PV88080AA_REG_HVBUCK_CONF2,
	.hvbuck_vsel_reg          = PV88080AA_REG_HVBUCK_CONF1,
	.hvbuck_enable_mask       = PV88080_HVBUCK_EN,
	.hvbuck_vsel_mask         = PV88080_VHVBUCK_MASK,
};


static const struct pv88080_compatible_regmap pv88080_ba_regs = {
	/* BUCK1 */
	.buck_regmap[0] = {
		.buck_enable_reg	  = PV88080BA_REG_BUCK1_CONF0,
		.buck_vsel_reg        = PV88080BA_REG_BUCK1_CONF0,
		.buck_mode_reg        = PV88080BA_REG_BUCK1_CONF1,
		.buck_limit_reg       = PV88080BA_REG_BUCK1_CONF1,
		.buck_vdac_range_reg  = PV88080BA_REG_BUCK1_CONF2,
		.buck_vrange_gain_reg = PV88080BA_REG_BUCK1_CONF5,
		.buck_enable_mask     = PV88080_BUCK1_EN,
		.buck_vsel_mask       = PV88080_VBUCK1_MASK,
		.buck_limit_mask	  = PV88080_BUCK1_ILIM_MASK,
        },
	/* BUCK2 */
	.buck_regmap[1] = {
		.buck_enable_reg	  = PV88080BA_REG_BUCK2_CONF0,
		.buck_vsel_reg        = PV88080BA_REG_BUCK2_CONF0,
		.buck_mode_reg        = PV88080BA_REG_BUCK2_CONF1,
		.buck_limit_reg	      = PV88080BA_REG_BUCK2_CONF1,
		.buck_vdac_range_reg  = PV88080BA_REG_BUCK2_CONF2,
		.buck_vrange_gain_reg = PV88080BA_REG_BUCK2_CONF5,
		.buck_enable_mask	  = PV88080_BUCK2_EN,
		.buck_vsel_mask       = PV88080_VBUCK2_MASK,
		.buck_limit_mask	  = PV88080_BUCK2_ILIM_MASK,
        },
	/* BUCK3 */
	.buck_regmap[2] = {
		.buck_enable_reg	  = PV88080BA_REG_BUCK3_CONF0,
		.buck_vsel_reg        = PV88080BA_REG_BUCK3_CONF0,
		.buck_mode_reg        = PV88080BA_REG_BUCK3_CONF1,
		.buck_limit_reg	      = PV88080BA_REG_BUCK3_CONF1,
		.buck_vdac_range_reg  = PV88080BA_REG_BUCK3_CONF2,
		.buck_vrange_gain_reg = PV88080BA_REG_BUCK3_CONF5,
		.buck_enable_mask	  = PV88080_BUCK3_EN,
		.buck_vsel_mask       = PV88080_VBUCK3_MASK,
		.buck_limit_mask	  = PV88080_BUCK3_ILIM_MASK,
        },
	/* HVBUCK */
	.hvbuck_enable_reg	      = PV88080BA_REG_HVBUCK_CONF2,
	.hvbuck_vsel_reg          = PV88080BA_REG_HVBUCK_CONF1,
	.hvbuck_enable_mask       = PV88080_HVBUCK_EN,
	.hvbuck_vsel_mask		  = PV88080_VHVBUCK_MASK,
};

#ifdef CONFIG_OF

static const struct of_device_id pv88080_dt_ids[] = {
	{ .compatible = "pvs,pv88080",    .data = (void *)TYPE_PV88080_AA },
	{ .compatible = "pvs,pv88080-aa", .data = (void *)TYPE_PV88080_AA },
	{ .compatible = "pvs,pv88080-ba", .data = (void *)TYPE_PV88080_BA },
	{},
};
MODULE_DEVICE_TABLE(of, pv88080_dt_ids);
#endif


static unsigned int pv88080_buck_get_mode(struct regulator_dev *rdev) { struct pv88080_regulator *info = rdev_get_drvdata(rdev); unsigned int data; int ret, mode = 0; ret = regmap_read(rdev->regmap, info->mode_reg, &data); if (ret < 0) return ret; switch (data & PV88080_BUCK1_MODE_MASK) { case PV88080_BUCK_MODE_SYNC: mode = REGULATOR_MODE_FAST; break; case PV88080_BUCK_MODE_AUTO: mode = REGULATOR_MODE_NORMAL; break; case PV88080_BUCK_MODE_SLEEP: mode = REGULATOR_MODE_STANDBY; break; default: return -EINVAL; } return mode; }

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static int pv88080_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct pv88080_regulator *info = rdev_get_drvdata(rdev); int val = 0; switch (mode) { case REGULATOR_MODE_FAST: val = PV88080_BUCK_MODE_SYNC; break; case REGULATOR_MODE_NORMAL: val = PV88080_BUCK_MODE_AUTO; break; case REGULATOR_MODE_STANDBY: val = PV88080_BUCK_MODE_SLEEP; break; default: return -EINVAL; } return regmap_update_bits(rdev->regmap, info->mode_reg, PV88080_BUCK1_MODE_MASK, val); }

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static int pv88080_set_current_limit(struct regulator_dev *rdev, int min, int max) { struct pv88080_regulator *info = rdev_get_drvdata(rdev); int i; /* search for closest to maximum */ for (i = info->n_current_limits; i >= 0; i--) { if (min <= info->current_limits[i] && max >= info->current_limits[i]) { return regmap_update_bits(rdev->regmap, info->limit_reg, info->limit_mask, i << PV88080_BUCK1_ILIM_SHIFT); } } return -EINVAL; }

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static int pv88080_get_current_limit(struct regulator_dev *rdev) { struct pv88080_regulator *info = rdev_get_drvdata(rdev); unsigned int data; int ret; ret = regmap_read(rdev->regmap, info->limit_reg, &data); if (ret < 0) return ret; data = (data & info->limit_mask) >> PV88080_BUCK1_ILIM_SHIFT; return info->current_limits[data]; }

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static struct regulator_ops pv88080_buck_ops = { .get_mode = pv88080_buck_get_mode, .set_mode = pv88080_buck_set_mode, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear, .set_current_limit = pv88080_set_current_limit, .get_current_limit = pv88080_get_current_limit, }; static struct regulator_ops pv88080_hvbuck_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear, }; #define PV88080_BUCK(chip, regl_name, min, step, max, limits_array) \ {\ .desc = {\ .id = chip##_ID_##regl_name,\ .name = __stringify(chip##_##regl_name),\ .of_match = of_match_ptr(#regl_name),\ .regulators_node = of_match_ptr("regulators"),\ .type = REGULATOR_VOLTAGE,\ .owner = THIS_MODULE,\ .ops = &pv88080_buck_ops,\ .min_uV = min, \ .uV_step = step, \ .n_voltages = ((max) - (min))/(step) + 1, \ },\ .current_limits = limits_array, \ .n_current_limits = ARRAY_SIZE(limits_array), \ } #define PV88080_HVBUCK(chip, regl_name, min, step, max) \ {\ .desc = {\ .id = chip##_ID_##regl_name,\ .name = __stringify(chip##_##regl_name),\ .of_match = of_match_ptr(#regl_name),\ .regulators_node = of_match_ptr("regulators"),\ .type = REGULATOR_VOLTAGE,\ .owner = THIS_MODULE,\ .ops = &pv88080_hvbuck_ops,\ .min_uV = min, \ .uV_step = step, \ .n_voltages = ((max) - (min))/(step) + 1, \ },\ } static struct pv88080_regulator pv88080_regulator_info[] = { PV88080_BUCK(PV88080, BUCK1, 600000, 6250, 1393750, pv88080_buck1_limits), PV88080_BUCK(PV88080, BUCK2, 600000, 6250, 1393750, pv88080_buck23_limits), PV88080_BUCK(PV88080, BUCK3, 600000, 6250, 1393750, pv88080_buck23_limits), PV88080_HVBUCK(PV88080, HVBUCK, 0, 5000, 1275000), };
static irqreturn_t pv88080_irq_handler(int irq, void *data) { struct pv88080 *chip = data; int i, reg_val, err, ret = IRQ_NONE; err = regmap_read(chip->regmap, PV88080_REG_EVENT_A, &reg_val); if (err < 0) goto error_i2c; if (reg_val & PV88080_E_VDD_FLT) { for (i = 0; i < PV88080_MAX_REGULATORS; i++) { if (chip->rdev[i] != NULL) { regulator_notifier_call_chain(chip->rdev[i], REGULATOR_EVENT_UNDER_VOLTAGE, NULL); } } err = regmap_write(chip->regmap, PV88080_REG_EVENT_A, PV88080_E_VDD_FLT); if (err < 0) goto error_i2c; ret = IRQ_HANDLED; } if (reg_val & PV88080_E_OVER_TEMP) { for (i = 0; i < PV88080_MAX_REGULATORS; i++) { if (chip->rdev[i] != NULL) { regulator_notifier_call_chain(chip->rdev[i], REGULATOR_EVENT_OVER_TEMP, NULL); } } err = regmap_write(chip->regmap, PV88080_REG_EVENT_A, PV88080_E_OVER_TEMP); if (err < 0) goto error_i2c; ret = IRQ_HANDLED; } return ret; error_i2c: dev_err(chip->dev, "I2C error : %d\n", err); return IRQ_NONE; }

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/* * I2C driver interface functions */
static int pv88080_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev); struct pv88080 *chip; const struct pv88080_compatible_regmap *regmap_config; const struct of_device_id *match; struct regulator_config config = { }; int i, error, ret; unsigned int conf2, conf5; chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88080), GFP_KERNEL); if (!chip) return -ENOMEM; chip->dev = &i2c->dev; chip->regmap = devm_regmap_init_i2c(i2c, &pv88080_regmap_config); if (IS_ERR(chip->regmap)) { error = PTR_ERR(chip->regmap); dev_err(chip->dev, "Failed to allocate register map: %d\n", error); return error; } if (i2c->dev.of_node) { match = of_match_node(pv88080_dt_ids, i2c->dev.of_node); if (!match) { dev_err(chip->dev, "Failed to get of_match_node\n"); return -EINVAL; } chip->type = (unsigned long)match->data; } else { chip->type = id->driver_data; } i2c_set_clientdata(i2c, chip); if (i2c->irq != 0) { ret = regmap_write(chip->regmap, PV88080_REG_MASK_A, 0xFF); if (ret < 0) { dev_err(chip->dev, "Failed to mask A reg: %d\n", ret); return ret; } ret = regmap_write(chip->regmap, PV88080_REG_MASK_B, 0xFF); if (ret < 0) { dev_err(chip->dev, "Failed to mask B reg: %d\n", ret); return ret; } ret = regmap_write(chip->regmap, PV88080_REG_MASK_C, 0xFF); if (ret < 0) { dev_err(chip->dev, "Failed to mask C reg: %d\n", ret); return ret; } ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, pv88080_irq_handler, IRQF_TRIGGER_LOW|IRQF_ONESHOT, "pv88080", chip); if (ret != 0) { dev_err(chip->dev, "Failed to request IRQ: %d\n", i2c->irq); return ret; } ret = regmap_update_bits(chip->regmap, PV88080_REG_MASK_A, PV88080_M_VDD_FLT | PV88080_M_OVER_TEMP, 0); if (ret < 0) { dev_err(chip->dev, "Failed to update mask reg: %d\n", ret); return ret; } } else { dev_warn(chip->dev, "No IRQ configured\n"); } switch (chip->type) { case TYPE_PV88080_AA: chip->regmap_config = &pv88080_aa_regs; break; case TYPE_PV88080_BA: chip->regmap_config = &pv88080_ba_regs; break; } regmap_config = chip->regmap_config; config.dev = chip->dev; config.regmap = chip->regmap; /* Registeration for BUCK1, 2, 3 */ for (i = 0; i < PV88080_MAX_REGULATORS-1; i++) { if (init_data) config.init_data = &init_data[i]; pv88080_regulator_info[i].limit_reg = regmap_config->buck_regmap[i].buck_limit_reg; pv88080_regulator_info[i].limit_mask = regmap_config->buck_regmap[i].buck_limit_mask; pv88080_regulator_info[i].mode_reg = regmap_config->buck_regmap[i].buck_mode_reg; pv88080_regulator_info[i].conf2 = regmap_config->buck_regmap[i].buck_vdac_range_reg; pv88080_regulator_info[i].conf5 = regmap_config->buck_regmap[i].buck_vrange_gain_reg; pv88080_regulator_info[i].desc.enable_reg = regmap_config->buck_regmap[i].buck_enable_reg; pv88080_regulator_info[i].desc.enable_mask = regmap_config->buck_regmap[i].buck_enable_mask; pv88080_regulator_info[i].desc.vsel_reg = regmap_config->buck_regmap[i].buck_vsel_reg; pv88080_regulator_info[i].desc.vsel_mask = regmap_config->buck_regmap[i].buck_vsel_mask; ret = regmap_read(chip->regmap, pv88080_regulator_info[i].conf2, &conf2); if (ret < 0) return ret; conf2 = ((conf2 >> PV88080_BUCK_VDAC_RANGE_SHIFT) & PV88080_BUCK_VDAC_RANGE_MASK); ret = regmap_read(chip->regmap, pv88080_regulator_info[i].conf5, &conf5); if (ret < 0) return ret; conf5 = ((conf5 >> PV88080_BUCK_VRANGE_GAIN_SHIFT) & PV88080_BUCK_VRANGE_GAIN_MASK); pv88080_regulator_info[i].desc.min_uV = pv88080_buck_vol[conf2].min_uV * (conf5+1); pv88080_regulator_info[i].desc.uV_step = pv88080_buck_vol[conf2].uV_step * (conf5+1); pv88080_regulator_info[i].desc.n_voltages = ((pv88080_buck_vol[conf2].max_uV * (conf5+1)) - (pv88080_regulator_info[i].desc.min_uV)) /(pv88080_regulator_info[i].desc.uV_step) + 1; config.driver_data = (void *)&pv88080_regulator_info[i]; chip->rdev[i] = devm_regulator_register(chip->dev, &pv88080_regulator_info[i].desc, &config); if (IS_ERR(chip->rdev[i])) { dev_err(chip->dev, "Failed to register PV88080 regulator\n"); return PTR_ERR(chip->rdev[i]); } } pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_reg = regmap_config->hvbuck_enable_reg; pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_mask = regmap_config->hvbuck_enable_mask; pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_reg = regmap_config->hvbuck_vsel_reg; pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_mask = regmap_config->hvbuck_vsel_mask; /* Registeration for HVBUCK */ if (init_data) config.init_data = &init_data[PV88080_ID_HVBUCK]; config.driver_data = (void *)&pv88080_regulator_info[PV88080_ID_HVBUCK]; chip->rdev[PV88080_ID_HVBUCK] = devm_regulator_register(chip->dev, &pv88080_regulator_info[PV88080_ID_HVBUCK].desc, &config); if (IS_ERR(chip->rdev[PV88080_ID_HVBUCK])) { dev_err(chip->dev, "Failed to register PV88080 regulator\n"); return PTR_ERR(chip->rdev[PV88080_ID_HVBUCK]); } return 0; }

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static const struct i2c_device_id pv88080_i2c_id[] = { { "pv88080", TYPE_PV88080_AA }, { "pv88080-aa", TYPE_PV88080_AA }, { "pv88080-ba", TYPE_PV88080_BA }, {}, }; MODULE_DEVICE_TABLE(i2c, pv88080_i2c_id); static struct i2c_driver pv88080_regulator_driver = { .driver = { .name = "pv88080", .of_match_table = of_match_ptr(pv88080_dt_ids), }, .probe = pv88080_i2c_probe, .id_table = pv88080_i2c_id, }; module_i2c_driver(pv88080_regulator_driver); MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>"); MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88080"); MODULE_LICENSE("GPL");

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