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Release 4.11 drivers/power/supply/tps65217_charger.c

/*
 * Battery charger driver for TI's tps65217
 *
 * Copyright (c) 2015, Collabora Ltd.

 * 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/>.
 */

/*
 * Battery charger driver for TI's tps65217
 */
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/power_supply.h>

#include <linux/mfd/core.h>
#include <linux/mfd/tps65217.h>


#define CHARGER_STATUS_PRESENT	(TPS65217_STATUS_ACPWR | TPS65217_STATUS_USBPWR)

#define NUM_CHARGER_IRQS	2

#define POLL_INTERVAL		(HZ * 2)


struct tps65217_charger {
	
struct tps65217 *tps;
	
struct device *dev;
	
struct power_supply *psy;

	
int	online;
	
int	prev_online;

	
struct task_struct	*poll_task;
};


static enum power_supply_property tps65217_charger_props[] = {
	POWER_SUPPLY_PROP_ONLINE,
};


static int tps65217_config_charger(struct tps65217_charger *charger) { int ret; dev_dbg(charger->dev, "%s\n", __func__); /* * tps65217 rev. G, p. 31 (see p. 32 for NTC schematic) * * The device can be configured to support a 100k NTC (B = 3960) by * setting the the NTC_TYPE bit in register CHGCONFIG1 to 1. However it * is not recommended to do so. In sleep mode, the charger continues * charging the battery, but all register values are reset to default * values. Therefore, the charger would get the wrong temperature * information. If 100k NTC setting is required, please contact the * factory. * * ATTENTION, conflicting information, from p. 46 * * NTC TYPE (for battery temperature measurement) * 0 – 100k (curve 1, B = 3960) * 1 – 10k (curve 2, B = 3480) (default on reset) * */ ret = tps65217_clear_bits(charger->tps, TPS65217_REG_CHGCONFIG1, TPS65217_CHGCONFIG1_NTC_TYPE, TPS65217_PROTECT_NONE); if (ret) { dev_err(charger->dev, "failed to set 100k NTC setting: %d\n", ret); return ret; } return 0; }

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Enric Balletbò i Serra64100.00%1100.00%
Total64100.00%1100.00%


static int tps65217_enable_charging(struct tps65217_charger *charger) { int ret; /* charger already enabled */ if (charger->online) return 0; dev_dbg(charger->dev, "%s: enable charging\n", __func__); ret = tps65217_set_bits(charger->tps, TPS65217_REG_CHGCONFIG1, TPS65217_CHGCONFIG1_CHG_EN, TPS65217_CHGCONFIG1_CHG_EN, TPS65217_PROTECT_NONE); if (ret) { dev_err(charger->dev, "%s: Error in writing CHG_EN in reg 0x%x: %d\n", __func__, TPS65217_REG_CHGCONFIG1, ret); return ret; } charger->online = 1; return 0; }

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Enric Balletbò i Serra8397.65%150.00%
Kim (Woogyom) Milo22.35%150.00%
Total85100.00%2100.00%


static int tps65217_charger_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { struct tps65217_charger *charger = power_supply_get_drvdata(psy); if (psp == POWER_SUPPLY_PROP_ONLINE) { val->intval = charger->online; return 0; } return -EINVAL; }

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Enric Balletbò i Serra5196.23%133.33%
Kim (Woogyom) Milo23.77%266.67%
Total53100.00%3100.00%


static irqreturn_t tps65217_charger_irq(int irq, void *dev) { int ret, val; struct tps65217_charger *charger = dev; charger->prev_online = charger->online; ret = tps65217_reg_read(charger->tps, TPS65217_REG_STATUS, &val); if (ret < 0) { dev_err(charger->dev, "%s: Error in reading reg 0x%x\n", __func__, TPS65217_REG_STATUS); return IRQ_HANDLED; } dev_dbg(charger->dev, "%s: 0x%x\n", __func__, val); /* check for charger status bit */ if (val & CHARGER_STATUS_PRESENT) { ret = tps65217_enable_charging(charger); if (ret) { dev_err(charger->dev, "failed to enable charger: %d\n", ret); return IRQ_HANDLED; } } else { charger->online = 0; } if (charger->prev_online != charger->online) power_supply_changed(charger->psy); ret = tps65217_reg_read(charger->tps, TPS65217_REG_CHGCONFIG0, &val); if (ret < 0) { dev_err(charger->dev, "%s: Error in reading reg 0x%x\n", __func__, TPS65217_REG_CHGCONFIG0); return IRQ_HANDLED; } if (val & TPS65217_CHGCONFIG0_ACTIVE) dev_dbg(charger->dev, "%s: charger is charging\n", __func__); else dev_dbg(charger->dev, "%s: charger is NOT charging\n", __func__); return IRQ_HANDLED; }

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Enric Balletbò i Serra20896.30%125.00%
Kim (Woogyom) Milo83.70%375.00%
Total216100.00%4100.00%


static int tps65217_charger_poll_task(void *data) { set_freezable(); while (!kthread_should_stop()) { schedule_timeout_interruptible(POLL_INTERVAL); try_to_freeze(); tps65217_charger_irq(-1, data); } return 0; }

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Enric Balletbò i Serra40100.00%1100.00%
Total40100.00%1100.00%

static const struct power_supply_desc tps65217_charger_desc = { .name = "tps65217-charger", .type = POWER_SUPPLY_TYPE_MAINS, .get_property = tps65217_charger_get_property, .properties = tps65217_charger_props, .num_properties = ARRAY_SIZE(tps65217_charger_props), };
static int tps65217_charger_probe(struct platform_device *pdev) { struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); struct tps65217_charger *charger; struct power_supply_config cfg = {}; struct task_struct *poll_task; int irq[NUM_CHARGER_IRQS]; int ret; int i; dev_dbg(&pdev->dev, "%s\n", __func__); charger = devm_kzalloc(&pdev->dev, sizeof(*charger), GFP_KERNEL); if (!charger) return -ENOMEM; platform_set_drvdata(pdev, charger); charger->tps = tps; charger->dev = &pdev->dev; cfg.of_node = pdev->dev.of_node; cfg.drv_data = charger; charger->psy = devm_power_supply_register(&pdev->dev, &tps65217_charger_desc, &cfg); if (IS_ERR(charger->psy)) { dev_err(&pdev->dev, "failed: power supply register\n"); return PTR_ERR(charger->psy); } irq[0] = platform_get_irq_byname(pdev, "USB"); irq[1] = platform_get_irq_byname(pdev, "AC"); ret = tps65217_config_charger(charger); if (ret < 0) { dev_err(charger->dev, "charger config failed, err %d\n", ret); return ret; } /* Create a polling thread if an interrupt is invalid */ if (irq[0] < 0 || irq[1] < 0) { poll_task = kthread_run(tps65217_charger_poll_task, charger, "ktps65217charger"); if (IS_ERR(poll_task)) { ret = PTR_ERR(poll_task); dev_err(charger->dev, "Unable to run kthread err %d\n", ret); return ret; } charger->poll_task = poll_task; return 0; } /* Create IRQ threads for charger interrupts */ for (i = 0; i < NUM_CHARGER_IRQS; i++) { ret = devm_request_threaded_irq(&pdev->dev, irq[i], NULL, tps65217_charger_irq, 0, "tps65217-charger", charger); if (ret) { dev_err(charger->dev, "Unable to register irq %d err %d\n", irq[i], ret); return ret; } /* Check current state */ tps65217_charger_irq(-1, charger); } return 0; }

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PersonTokensPropCommitsCommitProp
Enric Balletbò i Serra18549.07%114.29%
Kim (Woogyom) Milo11329.97%342.86%
Marcin Niestroj7219.10%228.57%
Wei Yongjun71.86%114.29%
Total377100.00%7100.00%


static int tps65217_charger_remove(struct platform_device *pdev) { struct tps65217_charger *charger = platform_get_drvdata(pdev); if (charger->poll_task) kthread_stop(charger->poll_task); return 0; }

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PersonTokensPropCommitsCommitProp
Enric Balletbò i Serra3183.78%133.33%
Marcin Niestroj513.51%133.33%
Kim (Woogyom) Milo12.70%133.33%
Total37100.00%3100.00%

static const struct of_device_id tps65217_charger_match_table[] = { { .compatible = "ti,tps65217-charger", }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, tps65217_charger_match_table); static struct platform_driver tps65217_charger_driver = { .probe = tps65217_charger_probe, .remove = tps65217_charger_remove, .driver = { .name = "tps65217-charger", .of_match_table = of_match_ptr(tps65217_charger_match_table), }, }; module_platform_driver(tps65217_charger_driver); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Enric Balletbo Serra <enric.balletbo@collabora.com>"); MODULE_DESCRIPTION("TPS65217 battery charger driver");

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PersonTokensPropCommitsCommitProp
Enric Balletbò i Serra86179.21%19.09%
Kim (Woogyom) Milo14213.06%763.64%
Marcin Niestroj777.08%218.18%
Wei Yongjun70.64%19.09%
Total1087100.00%11100.00%
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