| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Darbha Sriharsha | 1300 | 61.99% | 1 | 5.88% |
| Peter Rosin | 565 | 26.94% | 6 | 35.29% |
| Krzysztof Kozlowski | 62 | 2.96% | 2 | 11.76% |
| Jonathan Tinkham | 58 | 2.77% | 2 | 11.76% |
| Paul Kocialkowski | 48 | 2.29% | 2 | 11.76% |
| Vaishali Thakkar | 24 | 1.14% | 1 | 5.88% |
| Bruno Meneguele | 21 | 1.00% | 1 | 5.88% |
| Matti Vaittinen | 18 | 0.86% | 1 | 5.88% |
| Phil Reid | 1 | 0.05% | 1 | 5.88% |
| Total | 2097 | 17 |
/* * Battery charger driver for TI BQ24735 * * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved. * * 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; * * 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. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include <linux/devm-helpers.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/gpio/consumer.h> #include <linux/power_supply.h> #include <linux/slab.h> #include <linux/power/bq24735-charger.h> /* BQ24735 available commands and their respective masks */ #define BQ24735_CHARGE_OPT 0x12 #define BQ24735_CHARGE_CURRENT 0x14 #define BQ24735_CHARGE_CURRENT_MASK 0x1fc0 #define BQ24735_CHARGE_VOLTAGE 0x15 #define BQ24735_CHARGE_VOLTAGE_MASK 0x7ff0 #define BQ24735_INPUT_CURRENT 0x3f #define BQ24735_INPUT_CURRENT_MASK 0x1f80 #define BQ24735_MANUFACTURER_ID 0xfe #define BQ24735_DEVICE_ID 0xff /* ChargeOptions bits of interest */ #define BQ24735_CHARGE_OPT_CHG_DISABLE (1 << 0) #define BQ24735_CHARGE_OPT_AC_PRESENT (1 << 4) struct bq24735 { struct power_supply *charger; struct power_supply_desc charger_desc; struct i2c_client *client; struct bq24735_platform *pdata; struct mutex lock; struct gpio_desc *status_gpio; struct delayed_work poll; u32 poll_interval; bool charging; }; static inline struct bq24735 *to_bq24735(struct power_supply *psy) { return power_supply_get_drvdata(psy); } static enum power_supply_property bq24735_charger_properties[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_ONLINE, }; static int bq24735_charger_property_is_writeable(struct power_supply *psy, enum power_supply_property psp) { switch (psp) { case POWER_SUPPLY_PROP_STATUS: return 1; default: break; } return 0; } static inline int bq24735_write_word(struct i2c_client *client, u8 reg, u16 value) { return i2c_smbus_write_word_data(client, reg, value); } static inline int bq24735_read_word(struct i2c_client *client, u8 reg) { return i2c_smbus_read_word_data(client, reg); } static int bq24735_update_word(struct i2c_client *client, u8 reg, u16 mask, u16 value) { unsigned int tmp; int ret; ret = bq24735_read_word(client, reg); if (ret < 0) return ret; tmp = ret & ~mask; tmp |= value & mask; return bq24735_write_word(client, reg, tmp); } static int bq24735_config_charger(struct bq24735 *charger) { struct bq24735_platform *pdata = charger->pdata; int ret; u16 value; if (pdata->ext_control) return 0; if (pdata->charge_current) { value = pdata->charge_current & BQ24735_CHARGE_CURRENT_MASK; ret = bq24735_write_word(charger->client, BQ24735_CHARGE_CURRENT, value); if (ret < 0) { dev_err(&charger->client->dev, "Failed to write charger current : %d\n", ret); return ret; } } if (pdata->charge_voltage) { value = pdata->charge_voltage & BQ24735_CHARGE_VOLTAGE_MASK; ret = bq24735_write_word(charger->client, BQ24735_CHARGE_VOLTAGE, value); if (ret < 0) { dev_err(&charger->client->dev, "Failed to write charger voltage : %d\n", ret); return ret; } } if (pdata->input_current) { value = pdata->input_current & BQ24735_INPUT_CURRENT_MASK; ret = bq24735_write_word(charger->client, BQ24735_INPUT_CURRENT, value); if (ret < 0) { dev_err(&charger->client->dev, "Failed to write input current : %d\n", ret); return ret; } } return 0; } static inline int bq24735_enable_charging(struct bq24735 *charger) { int ret; if (charger->pdata->ext_control) return 0; ret = bq24735_config_charger(charger); if (ret) return ret; return bq24735_update_word(charger->client, BQ24735_CHARGE_OPT, BQ24735_CHARGE_OPT_CHG_DISABLE, 0); } static inline int bq24735_disable_charging(struct bq24735 *charger) { if (charger->pdata->ext_control) return 0; return bq24735_update_word(charger->client, BQ24735_CHARGE_OPT, BQ24735_CHARGE_OPT_CHG_DISABLE, BQ24735_CHARGE_OPT_CHG_DISABLE); } static bool bq24735_charger_is_present(struct bq24735 *charger) { if (charger->status_gpio) { return !gpiod_get_value_cansleep(charger->status_gpio); } else { int ac = 0; ac = bq24735_read_word(charger->client, BQ24735_CHARGE_OPT); if (ac < 0) { dev_dbg(&charger->client->dev, "Failed to read charger options : %d\n", ac); return false; } return (ac & BQ24735_CHARGE_OPT_AC_PRESENT) ? true : false; } return false; } static int bq24735_charger_is_charging(struct bq24735 *charger) { int ret; if (!bq24735_charger_is_present(charger)) return 0; ret = bq24735_read_word(charger->client, BQ24735_CHARGE_OPT); if (ret < 0) return ret; return !(ret & BQ24735_CHARGE_OPT_CHG_DISABLE); } static void bq24735_update(struct bq24735 *charger) { mutex_lock(&charger->lock); if (charger->charging && bq24735_charger_is_present(charger)) bq24735_enable_charging(charger); else bq24735_disable_charging(charger); mutex_unlock(&charger->lock); power_supply_changed(charger->charger); } static irqreturn_t bq24735_charger_isr(int irq, void *devid) { struct power_supply *psy = devid; struct bq24735 *charger = to_bq24735(psy); bq24735_update(charger); return IRQ_HANDLED; } static void bq24735_poll(struct work_struct *work) { struct bq24735 *charger = container_of(work, struct bq24735, poll.work); bq24735_update(charger); schedule_delayed_work(&charger->poll, msecs_to_jiffies(charger->poll_interval)); } static int bq24735_charger_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct bq24735 *charger = to_bq24735(psy); switch (psp) { case POWER_SUPPLY_PROP_ONLINE: val->intval = bq24735_charger_is_present(charger) ? 1 : 0; break; case POWER_SUPPLY_PROP_STATUS: switch (bq24735_charger_is_charging(charger)) { case 1: val->intval = POWER_SUPPLY_STATUS_CHARGING; break; case 0: val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; break; default: val->intval = POWER_SUPPLY_STATUS_UNKNOWN; break; } break; default: return -EINVAL; } return 0; } static int bq24735_charger_set_property(struct power_supply *psy, enum power_supply_property psp, const union power_supply_propval *val) { struct bq24735 *charger = to_bq24735(psy); int ret; switch (psp) { case POWER_SUPPLY_PROP_STATUS: switch (val->intval) { case POWER_SUPPLY_STATUS_CHARGING: mutex_lock(&charger->lock); charger->charging = true; ret = bq24735_enable_charging(charger); mutex_unlock(&charger->lock); if (ret) return ret; break; case POWER_SUPPLY_STATUS_DISCHARGING: case POWER_SUPPLY_STATUS_NOT_CHARGING: mutex_lock(&charger->lock); charger->charging = false; ret = bq24735_disable_charging(charger); mutex_unlock(&charger->lock); if (ret) return ret; break; default: return -EINVAL; } power_supply_changed(psy); break; default: return -EPERM; } return 0; } static struct bq24735_platform *bq24735_parse_dt_data(struct i2c_client *client) { struct bq24735_platform *pdata; struct device_node *np = client->dev.of_node; u32 val; int ret; pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) { dev_err(&client->dev, "Memory alloc for bq24735 pdata failed\n"); return NULL; } ret = of_property_read_u32(np, "ti,charge-current", &val); if (!ret) pdata->charge_current = val; ret = of_property_read_u32(np, "ti,charge-voltage", &val); if (!ret) pdata->charge_voltage = val; ret = of_property_read_u32(np, "ti,input-current", &val); if (!ret) pdata->input_current = val; pdata->ext_control = of_property_read_bool(np, "ti,external-control"); return pdata; } static int bq24735_charger_probe(struct i2c_client *client, const struct i2c_device_id *id) { int ret; struct bq24735 *charger; struct power_supply_desc *supply_desc; struct power_supply_config psy_cfg = {}; char *name; charger = devm_kzalloc(&client->dev, sizeof(*charger), GFP_KERNEL); if (!charger) return -ENOMEM; mutex_init(&charger->lock); charger->charging = true; charger->pdata = client->dev.platform_data; if (IS_ENABLED(CONFIG_OF) && !charger->pdata && client->dev.of_node) charger->pdata = bq24735_parse_dt_data(client); if (!charger->pdata) { dev_err(&client->dev, "no platform data provided\n"); return -EINVAL; } name = (char *)charger->pdata->name; if (!name) { name = devm_kasprintf(&client->dev, GFP_KERNEL, "bq24735@%s", dev_name(&client->dev)); if (!name) { dev_err(&client->dev, "Failed to alloc device name\n"); return -ENOMEM; } } charger->client = client; supply_desc = &charger->charger_desc; supply_desc->name = name; supply_desc->type = POWER_SUPPLY_TYPE_MAINS; supply_desc->properties = bq24735_charger_properties; supply_desc->num_properties = ARRAY_SIZE(bq24735_charger_properties); supply_desc->get_property = bq24735_charger_get_property; supply_desc->set_property = bq24735_charger_set_property; supply_desc->property_is_writeable = bq24735_charger_property_is_writeable; psy_cfg.supplied_to = charger->pdata->supplied_to; psy_cfg.num_supplicants = charger->pdata->num_supplicants; psy_cfg.of_node = client->dev.of_node; psy_cfg.drv_data = charger; i2c_set_clientdata(client, charger); charger->status_gpio = devm_gpiod_get_optional(&client->dev, "ti,ac-detect", GPIOD_IN); if (IS_ERR(charger->status_gpio)) { ret = PTR_ERR(charger->status_gpio); dev_err(&client->dev, "Getting gpio failed: %d\n", ret); return ret; } if (bq24735_charger_is_present(charger)) { ret = bq24735_read_word(client, BQ24735_MANUFACTURER_ID); if (ret < 0) { dev_err(&client->dev, "Failed to read manufacturer id : %d\n", ret); return ret; } else if (ret != 0x0040) { dev_err(&client->dev, "manufacturer id mismatch. 0x0040 != 0x%04x\n", ret); return -ENODEV; } ret = bq24735_read_word(client, BQ24735_DEVICE_ID); if (ret < 0) { dev_err(&client->dev, "Failed to read device id : %d\n", ret); return ret; } else if (ret != 0x000B) { dev_err(&client->dev, "device id mismatch. 0x000b != 0x%04x\n", ret); return -ENODEV; } ret = bq24735_enable_charging(charger); if (ret < 0) { dev_err(&client->dev, "Failed to enable charging\n"); return ret; } } charger->charger = devm_power_supply_register(&client->dev, supply_desc, &psy_cfg); if (IS_ERR(charger->charger)) { ret = PTR_ERR(charger->charger); dev_err(&client->dev, "Failed to register power supply: %d\n", ret); return ret; } if (client->irq) { ret = devm_request_threaded_irq(&client->dev, client->irq, NULL, bq24735_charger_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, supply_desc->name, charger->charger); if (ret) { dev_err(&client->dev, "Unable to register IRQ %d err %d\n", client->irq, ret); return ret; } } else { ret = device_property_read_u32(&client->dev, "poll-interval", &charger->poll_interval); if (ret) return 0; if (!charger->poll_interval) return 0; ret = devm_delayed_work_autocancel(&client->dev, &charger->poll, bq24735_poll); if (ret) return ret; schedule_delayed_work(&charger->poll, msecs_to_jiffies(charger->poll_interval)); } return 0; } static const struct i2c_device_id bq24735_charger_id[] = { { "bq24735-charger", 0 }, {} }; MODULE_DEVICE_TABLE(i2c, bq24735_charger_id); static const struct of_device_id bq24735_match_ids[] = { { .compatible = "ti,bq24735", }, { /* end */ } }; MODULE_DEVICE_TABLE(of, bq24735_match_ids); static struct i2c_driver bq24735_charger_driver = { .driver = { .name = "bq24735-charger", .of_match_table = bq24735_match_ids, }, .probe = bq24735_charger_probe, .id_table = bq24735_charger_id, }; module_i2c_driver(bq24735_charger_driver); MODULE_DESCRIPTION("bq24735 battery charging driver"); MODULE_AUTHOR("Darbha Sriharsha <dsriharsha@nvidia.com>"); MODULE_LICENSE("GPL v2");
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