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Release 4.11 drivers/power/supply/tps65090-charger.c

/*
 * Battery charger driver for TI's tps65090
 *
 * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.

 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.

 * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
 */
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/freezer.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/slab.h>

#include <linux/mfd/tps65090.h>


#define TPS65090_CHARGER_ENABLE	BIT(0)

#define TPS65090_VACG		BIT(1)

#define TPS65090_NOITERM	BIT(5)


#define POLL_INTERVAL		(HZ * 2)	
/* Used when no irq */


struct tps65090_charger {
	
struct	device	*dev;
	
int	ac_online;
	
int	prev_ac_online;
	
int	irq;
	
struct task_struct	*poll_task;
	
bool			passive_mode;
	
struct power_supply	*ac;
	
struct tps65090_platform_data *pdata;
};


static enum power_supply_property tps65090_ac_props[] = {
	POWER_SUPPLY_PROP_ONLINE,
};


static int tps65090_low_chrg_current(struct tps65090_charger *charger) { int ret; if (charger->passive_mode) return 0; ret = tps65090_write(charger->dev->parent, TPS65090_REG_CG_CTRL5, TPS65090_NOITERM); if (ret < 0) { dev_err(charger->dev, "%s(): error reading in register 0x%x\n", __func__, TPS65090_REG_CG_CTRL5); return ret; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Rhyland Klein5686.15%150.00%
Douglas Anderson913.85%150.00%
Total65100.00%2100.00%


static int tps65090_enable_charging(struct tps65090_charger *charger) { int ret; uint8_t ctrl0 = 0; if (charger->passive_mode) return 0; ret = tps65090_read(charger->dev->parent, TPS65090_REG_CG_CTRL0, &ctrl0); if (ret < 0) { dev_err(charger->dev, "%s(): error reading in register 0x%x\n", __func__, TPS65090_REG_CG_CTRL0); return ret; } ret = tps65090_write(charger->dev->parent, TPS65090_REG_CG_CTRL0, (ctrl0 | TPS65090_CHARGER_ENABLE)); if (ret < 0) { dev_err(charger->dev, "%s(): error writing in register 0x%x\n", __func__, TPS65090_REG_CG_CTRL0); return ret; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Rhyland Klein10491.23%133.33%
Douglas Anderson97.89%133.33%
Andrew Chew10.88%133.33%
Total114100.00%3100.00%


static int tps65090_config_charger(struct tps65090_charger *charger) { uint8_t intrmask = 0; int ret; if (charger->passive_mode) return 0; if (charger->pdata->enable_low_current_chrg) { ret = tps65090_low_chrg_current(charger); if (ret < 0) { dev_err(charger->dev, "error configuring low charge current\n"); return ret; } } /* Enable the VACG interrupt for AC power detect */ ret = tps65090_read(charger->dev->parent, TPS65090_REG_INTR_MASK, &intrmask); if (ret < 0) { dev_err(charger->dev, "%s(): error reading in register 0x%x\n", __func__, TPS65090_REG_INTR_MASK); return ret; } ret = tps65090_write(charger->dev->parent, TPS65090_REG_INTR_MASK, (intrmask | TPS65090_VACG)); if (ret < 0) { dev_err(charger->dev, "%s(): error writing in register 0x%x\n", __func__, TPS65090_REG_CG_CTRL0); return ret; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Chew8958.55%133.33%
Rhyland Klein5435.53%133.33%
Douglas Anderson95.92%133.33%
Total152100.00%3100.00%


static int tps65090_ac_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct tps65090_charger *charger = power_supply_get_drvdata(psy); if (psp == POWER_SUPPLY_PROP_ONLINE) { val->intval = charger->ac_online; charger->prev_ac_online = charger->ac_online; return 0; } return -EINVAL; }

Contributors

PersonTokensPropCommitsCommitProp
Rhyland Klein6098.36%150.00%
Krzysztof Kozlowski11.64%150.00%
Total61100.00%2100.00%


static irqreturn_t tps65090_charger_isr(int irq, void *dev_id) { struct tps65090_charger *charger = dev_id; int ret; uint8_t status1 = 0; uint8_t intrsts = 0; ret = tps65090_read(charger->dev->parent, TPS65090_REG_CG_STATUS1, &status1); if (ret < 0) { dev_err(charger->dev, "%s(): Error in reading reg 0x%x\n", __func__, TPS65090_REG_CG_STATUS1); return IRQ_HANDLED; } msleep(75); ret = tps65090_read(charger->dev->parent, TPS65090_REG_INTR_STS, &intrsts); if (ret < 0) { dev_err(charger->dev, "%s(): Error in reading reg 0x%x\n", __func__, TPS65090_REG_INTR_STS); return IRQ_HANDLED; } if (intrsts & TPS65090_VACG) { ret = tps65090_enable_charging(charger); if (ret < 0) return IRQ_HANDLED; charger->ac_online = 1; } else { charger->ac_online = 0; } /* Clear interrupts. */ if (!charger->passive_mode) { ret = tps65090_write(charger->dev->parent, TPS65090_REG_INTR_STS, 0x00); if (ret < 0) { dev_err(charger->dev, "%s(): Error in writing reg 0x%x\n", __func__, TPS65090_REG_INTR_STS); } } if (charger->prev_ac_online != charger->ac_online) power_supply_changed(charger->ac); return IRQ_HANDLED; }

Contributors

PersonTokensPropCommitsCommitProp
Rhyland Klein17779.37%133.33%
Andrew Chew3716.59%133.33%
Douglas Anderson94.04%133.33%
Total223100.00%3100.00%


static struct tps65090_platform_data * tps65090_parse_dt_charger_data(struct platform_device *pdev) { struct tps65090_platform_data *pdata; struct device_node *np = pdev->dev.of_node; unsigned int prop; pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) { dev_err(&pdev->dev, "Memory alloc for tps65090_pdata failed\n"); return NULL; } prop = of_property_read_bool(np, "ti,enable-low-current-chrg"); pdata->enable_low_current_chrg = prop; pdata->irq_base = -1; return pdata; }

Contributors

PersonTokensPropCommitsCommitProp
Rhyland Klein96100.00%1100.00%
Total96100.00%1100.00%


static int tps65090_charger_poll_task(void *data) { set_freezable(); while (!kthread_should_stop()) { schedule_timeout_interruptible(POLL_INTERVAL); try_to_freeze(); tps65090_charger_isr(-1, data); } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Douglas Anderson40100.00%1100.00%
Total40100.00%1100.00%

static const struct power_supply_desc tps65090_charger_desc = { .name = "tps65090-ac", .type = POWER_SUPPLY_TYPE_MAINS, .get_property = tps65090_ac_get_property, .properties = tps65090_ac_props, .num_properties = ARRAY_SIZE(tps65090_ac_props), };
static int tps65090_charger_probe(struct platform_device *pdev) { struct tps65090_charger *cdata; struct tps65090_platform_data *pdata; struct power_supply_config psy_cfg = {}; uint8_t status1 = 0; int ret; int irq; pdata = dev_get_platdata(pdev->dev.parent); if (IS_ENABLED(CONFIG_OF) && !pdata && pdev->dev.of_node) pdata = tps65090_parse_dt_charger_data(pdev); if (!pdata) { dev_err(&pdev->dev, "%s():no platform data available\n", __func__); return -ENODEV; } cdata = devm_kzalloc(&pdev->dev, sizeof(*cdata), GFP_KERNEL); if (!cdata) { dev_err(&pdev->dev, "failed to allocate memory status\n"); return -ENOMEM; } platform_set_drvdata(pdev, cdata); cdata->dev = &pdev->dev; cdata->pdata = pdata; psy_cfg.supplied_to = pdata->supplied_to; psy_cfg.num_supplicants = pdata->num_supplicants; psy_cfg.of_node = pdev->dev.of_node; psy_cfg.drv_data = cdata; cdata->ac = power_supply_register(&pdev->dev, &tps65090_charger_desc, &psy_cfg); if (IS_ERR(cdata->ac)) { dev_err(&pdev->dev, "failed: power supply register\n"); return PTR_ERR(cdata->ac); } irq = platform_get_irq(pdev, 0); if (irq < 0) irq = -ENXIO; cdata->irq = irq; ret = tps65090_config_charger(cdata); if (ret < 0) { dev_err(&pdev->dev, "charger config failed, err %d\n", ret); goto fail_unregister_supply; } /* Check for charger presence */ ret = tps65090_read(cdata->dev->parent, TPS65090_REG_CG_STATUS1, &status1); if (ret < 0) { dev_err(cdata->dev, "%s(): Error in reading reg 0x%x", __func__, TPS65090_REG_CG_STATUS1); goto fail_unregister_supply; } if (status1 != 0) { ret = tps65090_enable_charging(cdata); if (ret < 0) { dev_err(cdata->dev, "error enabling charger\n"); goto fail_unregister_supply; } cdata->ac_online = 1; power_supply_changed(cdata->ac); } if (irq != -ENXIO) { ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, tps65090_charger_isr, 0, "tps65090-charger", cdata); if (ret) { dev_err(cdata->dev, "Unable to register irq %d err %d\n", irq, ret); goto fail_unregister_supply; } } else { cdata->poll_task = kthread_run(tps65090_charger_poll_task, cdata, "ktps65090charger"); cdata->passive_mode = true; if (IS_ERR(cdata->poll_task)) { ret = PTR_ERR(cdata->poll_task); dev_err(cdata->dev, "Unable to run kthread err %d\n", ret); goto fail_unregister_supply; } } return 0; fail_unregister_supply: power_supply_unregister(cdata->ac); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Rhyland Klein34969.25%333.33%
Douglas Anderson11222.22%111.11%
Krzysztof Kozlowski346.75%222.22%
Manish Badarkhe50.99%111.11%
Wei Yongjun30.60%111.11%
Jingoo Han10.20%111.11%
Total504100.00%9100.00%


static int tps65090_charger_remove(struct platform_device *pdev) { struct tps65090_charger *cdata = platform_get_drvdata(pdev); if (cdata->irq == -ENXIO) kthread_stop(cdata->poll_task); power_supply_unregister(cdata->ac); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Rhyland Klein3063.83%133.33%
Douglas Anderson1634.04%133.33%
Jingoo Han12.13%133.33%
Total47100.00%3100.00%

static const struct of_device_id of_tps65090_charger_match[] = { { .compatible = "ti,tps65090-charger", }, { /* end */ } }; MODULE_DEVICE_TABLE(of, of_tps65090_charger_match); static struct platform_driver tps65090_charger_driver = { .driver = { .name = "tps65090-charger", .of_match_table = of_tps65090_charger_match, }, .probe = tps65090_charger_probe, .remove = tps65090_charger_remove, }; module_platform_driver(tps65090_charger_driver); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Syed Rafiuddin <srafiuddin@nvidia.com>"); MODULE_DESCRIPTION("tps65090 battery charger driver");

Overall Contributors

PersonTokensPropCommitsCommitProp
Rhyland Klein107470.61%325.00%
Douglas Anderson22314.66%18.33%
Andrew Chew1278.35%18.33%
Krzysztof Kozlowski724.73%216.67%
Manish Badarkhe120.79%18.33%
Luis de Bethencourt70.46%18.33%
Wei Yongjun30.20%18.33%
Jingoo Han20.13%18.33%
Fabian Frederick10.07%18.33%
Total1521100.00%12100.00%
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