diff options
Diffstat (limited to 'drivers/power/tps65090-charger.c')
| -rw-r--r-- | drivers/power/tps65090-charger.c | 346 |
1 files changed, 0 insertions, 346 deletions
diff --git a/drivers/power/tps65090-charger.c b/drivers/power/tps65090-charger.c deleted file mode 100644 index bdd7b9b2546a..000000000000 --- a/drivers/power/tps65090-charger.c +++ /dev/null @@ -1,346 +0,0 @@ -/* - * 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/err.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/platform_device.h> -#include <linux/power_supply.h> -#include <linux/mfd/tps65090.h> - -#define TPS65090_REG_INTR_STS 0x00 -#define TPS65090_REG_INTR_MASK 0x02 -#define TPS65090_REG_CG_CTRL0 0x04 -#define TPS65090_REG_CG_CTRL1 0x05 -#define TPS65090_REG_CG_CTRL2 0x06 -#define TPS65090_REG_CG_CTRL3 0x07 -#define TPS65090_REG_CG_CTRL4 0x08 -#define TPS65090_REG_CG_CTRL5 0x09 -#define TPS65090_REG_CG_STATUS1 0x0a -#define TPS65090_REG_CG_STATUS2 0x0b - -#define TPS65090_CHARGER_ENABLE BIT(0) -#define TPS65090_VACG BIT(1) -#define TPS65090_NOITERM BIT(5) - -struct tps65090_charger { - struct device *dev; - int ac_online; - int prev_ac_online; - int irq; - 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; - - 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; -} - -static int tps65090_enable_charging(struct tps65090_charger *charger) -{ - int ret; - uint8_t ctrl0 = 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; -} - -static int tps65090_config_charger(struct tps65090_charger *charger) -{ - uint8_t intrmask = 0; - int ret; - - 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; -} - -static int tps65090_ac_get_property(struct power_supply *psy, - enum power_supply_property psp, - union power_supply_propval *val) -{ - struct tps65090_charger *charger = container_of(psy, - struct tps65090_charger, ac); - - if (psp == POWER_SUPPLY_PROP_ONLINE) { - val->intval = charger->ac_online; - charger->prev_ac_online = charger->ac_online; - return 0; - } - return -EINVAL; -} - -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. */ - 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; -} - -#if defined(CONFIG_OF) - -#include <linux/of_device.h> - -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; - -} -#else -static struct tps65090_platform_data * - tps65090_parse_dt_charger_data(struct platform_device *pdev) -{ - return NULL; -} -#endif - -static int tps65090_charger_probe(struct platform_device *pdev) -{ - struct tps65090_charger *cdata; - struct tps65090_platform_data *pdata; - uint8_t status1 = 0; - int ret; - int irq; - - pdata = dev_get_platdata(pdev->dev.parent); - - if (!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; - - cdata->ac.name = "tps65090-ac"; - cdata->ac.type = POWER_SUPPLY_TYPE_MAINS; - cdata->ac.get_property = tps65090_ac_get_property; - cdata->ac.properties = tps65090_ac_props; - cdata->ac.num_properties = ARRAY_SIZE(tps65090_ac_props); - cdata->ac.supplied_to = pdata->supplied_to; - cdata->ac.num_supplicants = pdata->num_supplicants; - cdata->ac.of_node = pdev->dev.of_node; - - ret = power_supply_register(&pdev->dev, &cdata->ac); - if (ret) { - dev_err(&pdev->dev, "failed: power supply register\n"); - return ret; - } - - irq = platform_get_irq(pdev, 0); - if (irq <= 0) { - dev_warn(&pdev->dev, "Unable to get charger irq = %d\n", irq); - ret = irq; - goto fail_unregister_supply; - } - - cdata->irq = irq; - - 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_free_irq; - } - - ret = tps65090_config_charger(cdata); - if (ret < 0) { - dev_err(&pdev->dev, "charger config failed, err %d\n", ret); - goto fail_free_irq; - } - - /* 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_free_irq; - } - - if (status1 != 0) { - ret = tps65090_enable_charging(cdata); - if (ret < 0) { - dev_err(cdata->dev, "error enabling charger\n"); - goto fail_free_irq; - } - cdata->ac_online = 1; - power_supply_changed(&cdata->ac); - } - - return 0; - -fail_free_irq: - devm_free_irq(cdata->dev, irq, cdata); -fail_unregister_supply: - power_supply_unregister(&cdata->ac); - - return ret; -} - -static int tps65090_charger_remove(struct platform_device *pdev) -{ - struct tps65090_charger *cdata = platform_get_drvdata(pdev); - - devm_free_irq(cdata->dev, cdata->irq, cdata); - power_supply_unregister(&cdata->ac); - - return 0; -} - -static struct of_device_id of_tps65090_charger_match[] = { - { .compatible = "ti,tps65090-charger", }, - { /* end */ } -}; - -static struct platform_driver tps65090_charger_driver = { - .driver = { - .name = "tps65090-charger", - .of_match_table = of_tps65090_charger_match, - .owner = THIS_MODULE, - }, - .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"); |