cregit-Linux how code gets into the kernel

Release 4.10 drivers/regulator/pv88060-regulator.c

/*
 * pv88060-regulator.c - Regulator device driver for PV88060
 * Copyright (C) 2015  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/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 "pv88060-regulator.h"


#define PV88060_MAX_REGULATORS	14

/* PV88060 REGULATOR IDs */
enum {
	/* BUCKs */
	
PV88060_ID_BUCK1,

	/* LDOs */
	
PV88060_ID_LDO1,
	
PV88060_ID_LDO2,
	
PV88060_ID_LDO3,
	
PV88060_ID_LDO4,
	
PV88060_ID_LDO5,
	
PV88060_ID_LDO6,
	
PV88060_ID_LDO7,

	/* SWTs */
	
PV88060_ID_SW1,
	
PV88060_ID_SW2,
	
PV88060_ID_SW3,
	
PV88060_ID_SW4,
	
PV88060_ID_SW5,
	
PV88060_ID_SW6,
};


struct pv88060_regulator {
	
struct regulator_desc desc;
	/* Current limiting */
	
unsigned	n_current_limits;
	
const int	*current_limits;
	
unsigned int limit_mask;
	
unsigned int conf;		/* buck configuration register */
};


struct pv88060 {
	
struct device *dev;
	
struct regmap *regmap;
	
struct regulator_dev *rdev[PV88060_MAX_REGULATORS];
};


static const struct regmap_config pv88060_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
};

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


static const int pv88060_buck1_limits[] = {
	1496000, 2393000, 3291000, 4189000
};


static unsigned int pv88060_buck_get_mode(struct regulator_dev *rdev) { struct pv88060_regulator *info = rdev_get_drvdata(rdev); unsigned int data; int ret, mode = 0; ret = regmap_read(rdev->regmap, info->conf, &data); if (ret < 0) return ret; switch (data & PV88060_BUCK_MODE_MASK) { case PV88060_BUCK_MODE_SYNC: mode = REGULATOR_MODE_FAST; break; case PV88060_BUCK_MODE_AUTO: mode = REGULATOR_MODE_NORMAL; break; case PV88060_BUCK_MODE_SLEEP: mode = REGULATOR_MODE_STANDBY; break; } return mode; }

Contributors

PersonTokensPropCommitsCommitProp
james banjames ban93100.00%1100.00%
Total93100.00%1100.00%


static int pv88060_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct pv88060_regulator *info = rdev_get_drvdata(rdev); int val = 0; switch (mode) { case REGULATOR_MODE_FAST: val = PV88060_BUCK_MODE_SYNC; break; case REGULATOR_MODE_NORMAL: val = PV88060_BUCK_MODE_AUTO; break; case REGULATOR_MODE_STANDBY: val = PV88060_BUCK_MODE_SLEEP; break; default: return -EINVAL; } return regmap_update_bits(rdev->regmap, info->conf, PV88060_BUCK_MODE_MASK, val); }

Contributors

PersonTokensPropCommitsCommitProp
james banjames ban81100.00%1100.00%
Total81100.00%1100.00%


static int pv88060_set_current_limit(struct regulator_dev *rdev, int min, int max) { struct pv88060_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->conf, info->limit_mask, i << PV88060_BUCK_ILIM_SHIFT); } } return -EINVAL; }

Contributors

PersonTokensPropCommitsCommitProp
james banjames ban94100.00%1100.00%
Total94100.00%1100.00%


static int pv88060_get_current_limit(struct regulator_dev *rdev) { struct pv88060_regulator *info = rdev_get_drvdata(rdev); unsigned int data; int ret; ret = regmap_read(rdev->regmap, info->conf, &data); if (ret < 0) return ret; data = (data & info->limit_mask) >> PV88060_BUCK_ILIM_SHIFT; return info->current_limits[data]; }

Contributors

PersonTokensPropCommitsCommitProp
james banjames ban73100.00%1100.00%
Total73100.00%1100.00%

static struct regulator_ops pv88060_buck_ops = { .get_mode = pv88060_buck_get_mode, .set_mode = pv88060_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 = pv88060_set_current_limit, .get_current_limit = pv88060_get_current_limit, }; static struct regulator_ops pv88060_ldo_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 PV88060_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 = &pv88060_buck_ops,\ .min_uV = min,\ .uV_step = step,\ .n_voltages = ((max) - (min))/(step) + 1,\ .enable_reg = PV88060_REG_##regl_name##_CONF0,\ .enable_mask = PV88060_BUCK_EN, \ .vsel_reg = PV88060_REG_##regl_name##_CONF0,\ .vsel_mask = PV88060_VBUCK_MASK,\ },\ .current_limits = limits_array,\ .n_current_limits = ARRAY_SIZE(limits_array),\ .limit_mask = PV88060_BUCK_ILIM_MASK, \ .conf = PV88060_REG_##regl_name##_CONF1,\ } #define PV88060_LDO(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 = &pv88060_ldo_ops,\ .min_uV = min, \ .uV_step = step, \ .n_voltages = (step) ? ((max - min) / step + 1) : 1, \ .enable_reg = PV88060_REG_##regl_name##_CONF, \ .enable_mask = PV88060_LDO_EN, \ .vsel_reg = PV88060_REG_##regl_name##_CONF, \ .vsel_mask = PV88060_VLDO_MASK, \ },\ } #define PV88060_SW(chip, regl_name, 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 = &pv88060_ldo_ops,\ .min_uV = max,\ .uV_step = 0,\ .n_voltages = 1,\ .enable_reg = PV88060_REG_##regl_name##_CONF,\ .enable_mask = PV88060_SW_EN,\ },\ } static const struct pv88060_regulator pv88060_regulator_info[] = { PV88060_BUCK(PV88060, BUCK1, 2800000, 12500, 4387500, pv88060_buck1_limits), PV88060_LDO(PV88060, LDO1, 1200000, 50000, 3350000), PV88060_LDO(PV88060, LDO2, 1200000, 50000, 3350000), PV88060_LDO(PV88060, LDO3, 1200000, 50000, 3350000), PV88060_LDO(PV88060, LDO4, 1200000, 50000, 3350000), PV88060_LDO(PV88060, LDO5, 1200000, 50000, 3350000), PV88060_LDO(PV88060, LDO6, 1200000, 50000, 3350000), PV88060_LDO(PV88060, LDO7, 1200000, 50000, 3350000), PV88060_SW(PV88060, SW1, 5000000), PV88060_SW(PV88060, SW2, 5000000), PV88060_SW(PV88060, SW3, 5000000), PV88060_SW(PV88060, SW4, 5000000), PV88060_SW(PV88060, SW5, 5000000), PV88060_SW(PV88060, SW6, 5000000), };
static irqreturn_t pv88060_irq_handler(int irq, void *data) { struct pv88060 *chip = data; int i, reg_val, err, ret = IRQ_NONE; err = regmap_read(chip->regmap, PV88060_REG_EVENT_A, &reg_val); if (err < 0) goto error_i2c; if (reg_val & PV88060_E_VDD_FLT) { for (i = 0; i < PV88060_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, PV88060_REG_EVENT_A, PV88060_E_VDD_FLT); if (err < 0) goto error_i2c; ret = IRQ_HANDLED; } if (reg_val & PV88060_E_OVER_TEMP) { for (i = 0; i < PV88060_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, PV88060_REG_EVENT_A, PV88060_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; }

Contributors

PersonTokensPropCommitsCommitProp
james banjames ban225100.00%2100.00%
Total225100.00%2100.00%

/* * I2C driver interface functions */
static int pv88060_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev); struct pv88060 *chip; struct regulator_config config = { }; int error, i, ret = 0; chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88060), GFP_KERNEL); if (!chip) return -ENOMEM; chip->dev = &i2c->dev; chip->regmap = devm_regmap_init_i2c(i2c, &pv88060_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; } i2c_set_clientdata(i2c, chip); if (i2c->irq != 0) { ret = regmap_write(chip->regmap, PV88060_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, PV88060_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, PV88060_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, pv88060_irq_handler, IRQF_TRIGGER_LOW|IRQF_ONESHOT, "pv88060", chip); if (ret != 0) { dev_err(chip->dev, "Failed to request IRQ: %d\n", i2c->irq); return ret; } ret = regmap_update_bits(chip->regmap, PV88060_REG_MASK_A, PV88060_M_VDD_FLT | PV88060_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"); } config.dev = chip->dev; config.regmap = chip->regmap; for (i = 0; i < PV88060_MAX_REGULATORS; i++) { if (init_data) config.init_data = &init_data[i]; config.driver_data = (void *)&pv88060_regulator_info[i]; chip->rdev[i] = devm_regulator_register(chip->dev, &pv88060_regulator_info[i].desc, &config); if (IS_ERR(chip->rdev[i])) { dev_err(chip->dev, "Failed to register PV88060 regulator\n"); return PTR_ERR(chip->rdev[i]); } } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
james banjames ban46697.90%133.33%
axel linaxel lin61.26%133.33%
dan carpenterdan carpenter40.84%133.33%
Total476100.00%3100.00%

static const struct i2c_device_id pv88060_i2c_id[] = { {"pv88060", 0}, {}, }; MODULE_DEVICE_TABLE(i2c, pv88060_i2c_id); #ifdef CONFIG_OF static const struct of_device_id pv88060_dt_ids[] = { { .compatible = "pvs,pv88060", .data = &pv88060_i2c_id[0] }, {}, }; MODULE_DEVICE_TABLE(of, pv88060_dt_ids); #endif static struct i2c_driver pv88060_regulator_driver = { .driver = { .name = "pv88060", .of_match_table = of_match_ptr(pv88060_dt_ids), }, .probe = pv88060_i2c_probe, .id_table = pv88060_i2c_id, }; module_i2c_driver(pv88060_regulator_driver); MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>"); MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88060"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
james banjames ban162199.39%250.00%
axel linaxel lin60.37%125.00%
dan carpenterdan carpenter40.25%125.00%
Total1631100.00%4100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.