19952f691SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
28c0984e5SSebastian Reichel /*
38c0984e5SSebastian Reichel * Battery charger driver for TI's tps65090
48c0984e5SSebastian Reichel *
58c0984e5SSebastian Reichel * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
68c0984e5SSebastian Reichel
78c0984e5SSebastian Reichel */
88c0984e5SSebastian Reichel #include <linux/delay.h>
98c0984e5SSebastian Reichel #include <linux/err.h>
108c0984e5SSebastian Reichel #include <linux/freezer.h>
118c0984e5SSebastian Reichel #include <linux/init.h>
128c0984e5SSebastian Reichel #include <linux/interrupt.h>
138c0984e5SSebastian Reichel #include <linux/kernel.h>
148c0984e5SSebastian Reichel #include <linux/kthread.h>
158c0984e5SSebastian Reichel #include <linux/module.h>
16*2ce8284cSRob Herring #include <linux/of.h>
178c0984e5SSebastian Reichel #include <linux/platform_device.h>
188c0984e5SSebastian Reichel #include <linux/power_supply.h>
198c0984e5SSebastian Reichel #include <linux/slab.h>
208c0984e5SSebastian Reichel
218c0984e5SSebastian Reichel #include <linux/mfd/tps65090.h>
228c0984e5SSebastian Reichel
238c0984e5SSebastian Reichel #define TPS65090_CHARGER_ENABLE BIT(0)
248c0984e5SSebastian Reichel #define TPS65090_VACG BIT(1)
258c0984e5SSebastian Reichel #define TPS65090_NOITERM BIT(5)
268c0984e5SSebastian Reichel
278c0984e5SSebastian Reichel #define POLL_INTERVAL (HZ * 2) /* Used when no irq */
288c0984e5SSebastian Reichel
298c0984e5SSebastian Reichel struct tps65090_charger {
308c0984e5SSebastian Reichel struct device *dev;
318c0984e5SSebastian Reichel int ac_online;
328c0984e5SSebastian Reichel int prev_ac_online;
338c0984e5SSebastian Reichel int irq;
348c0984e5SSebastian Reichel struct task_struct *poll_task;
358c0984e5SSebastian Reichel bool passive_mode;
368c0984e5SSebastian Reichel struct power_supply *ac;
378c0984e5SSebastian Reichel struct tps65090_platform_data *pdata;
388c0984e5SSebastian Reichel };
398c0984e5SSebastian Reichel
408c0984e5SSebastian Reichel static enum power_supply_property tps65090_ac_props[] = {
418c0984e5SSebastian Reichel POWER_SUPPLY_PROP_ONLINE,
428c0984e5SSebastian Reichel };
438c0984e5SSebastian Reichel
tps65090_low_chrg_current(struct tps65090_charger * charger)448c0984e5SSebastian Reichel static int tps65090_low_chrg_current(struct tps65090_charger *charger)
458c0984e5SSebastian Reichel {
468c0984e5SSebastian Reichel int ret;
478c0984e5SSebastian Reichel
488c0984e5SSebastian Reichel if (charger->passive_mode)
498c0984e5SSebastian Reichel return 0;
508c0984e5SSebastian Reichel
518c0984e5SSebastian Reichel ret = tps65090_write(charger->dev->parent, TPS65090_REG_CG_CTRL5,
528c0984e5SSebastian Reichel TPS65090_NOITERM);
538c0984e5SSebastian Reichel if (ret < 0) {
548c0984e5SSebastian Reichel dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
558c0984e5SSebastian Reichel __func__, TPS65090_REG_CG_CTRL5);
568c0984e5SSebastian Reichel return ret;
578c0984e5SSebastian Reichel }
588c0984e5SSebastian Reichel return 0;
598c0984e5SSebastian Reichel }
608c0984e5SSebastian Reichel
tps65090_enable_charging(struct tps65090_charger * charger)618c0984e5SSebastian Reichel static int tps65090_enable_charging(struct tps65090_charger *charger)
628c0984e5SSebastian Reichel {
638c0984e5SSebastian Reichel int ret;
648c0984e5SSebastian Reichel uint8_t ctrl0 = 0;
658c0984e5SSebastian Reichel
668c0984e5SSebastian Reichel if (charger->passive_mode)
678c0984e5SSebastian Reichel return 0;
688c0984e5SSebastian Reichel
698c0984e5SSebastian Reichel ret = tps65090_read(charger->dev->parent, TPS65090_REG_CG_CTRL0,
708c0984e5SSebastian Reichel &ctrl0);
718c0984e5SSebastian Reichel if (ret < 0) {
728c0984e5SSebastian Reichel dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
738c0984e5SSebastian Reichel __func__, TPS65090_REG_CG_CTRL0);
748c0984e5SSebastian Reichel return ret;
758c0984e5SSebastian Reichel }
768c0984e5SSebastian Reichel
778c0984e5SSebastian Reichel ret = tps65090_write(charger->dev->parent, TPS65090_REG_CG_CTRL0,
788c0984e5SSebastian Reichel (ctrl0 | TPS65090_CHARGER_ENABLE));
798c0984e5SSebastian Reichel if (ret < 0) {
808c0984e5SSebastian Reichel dev_err(charger->dev, "%s(): error writing in register 0x%x\n",
818c0984e5SSebastian Reichel __func__, TPS65090_REG_CG_CTRL0);
828c0984e5SSebastian Reichel return ret;
838c0984e5SSebastian Reichel }
848c0984e5SSebastian Reichel return 0;
858c0984e5SSebastian Reichel }
868c0984e5SSebastian Reichel
tps65090_config_charger(struct tps65090_charger * charger)878c0984e5SSebastian Reichel static int tps65090_config_charger(struct tps65090_charger *charger)
888c0984e5SSebastian Reichel {
898c0984e5SSebastian Reichel uint8_t intrmask = 0;
908c0984e5SSebastian Reichel int ret;
918c0984e5SSebastian Reichel
928c0984e5SSebastian Reichel if (charger->passive_mode)
938c0984e5SSebastian Reichel return 0;
948c0984e5SSebastian Reichel
958c0984e5SSebastian Reichel if (charger->pdata->enable_low_current_chrg) {
968c0984e5SSebastian Reichel ret = tps65090_low_chrg_current(charger);
978c0984e5SSebastian Reichel if (ret < 0) {
988c0984e5SSebastian Reichel dev_err(charger->dev,
998c0984e5SSebastian Reichel "error configuring low charge current\n");
1008c0984e5SSebastian Reichel return ret;
1018c0984e5SSebastian Reichel }
1028c0984e5SSebastian Reichel }
1038c0984e5SSebastian Reichel
1048c0984e5SSebastian Reichel /* Enable the VACG interrupt for AC power detect */
1058c0984e5SSebastian Reichel ret = tps65090_read(charger->dev->parent, TPS65090_REG_INTR_MASK,
1068c0984e5SSebastian Reichel &intrmask);
1078c0984e5SSebastian Reichel if (ret < 0) {
1088c0984e5SSebastian Reichel dev_err(charger->dev, "%s(): error reading in register 0x%x\n",
1098c0984e5SSebastian Reichel __func__, TPS65090_REG_INTR_MASK);
1108c0984e5SSebastian Reichel return ret;
1118c0984e5SSebastian Reichel }
1128c0984e5SSebastian Reichel
1138c0984e5SSebastian Reichel ret = tps65090_write(charger->dev->parent, TPS65090_REG_INTR_MASK,
1148c0984e5SSebastian Reichel (intrmask | TPS65090_VACG));
1158c0984e5SSebastian Reichel if (ret < 0) {
1168c0984e5SSebastian Reichel dev_err(charger->dev, "%s(): error writing in register 0x%x\n",
1178c0984e5SSebastian Reichel __func__, TPS65090_REG_CG_CTRL0);
1188c0984e5SSebastian Reichel return ret;
1198c0984e5SSebastian Reichel }
1208c0984e5SSebastian Reichel
1218c0984e5SSebastian Reichel return 0;
1228c0984e5SSebastian Reichel }
1238c0984e5SSebastian Reichel
tps65090_ac_get_property(struct power_supply * psy,enum power_supply_property psp,union power_supply_propval * val)1248c0984e5SSebastian Reichel static int tps65090_ac_get_property(struct power_supply *psy,
1258c0984e5SSebastian Reichel enum power_supply_property psp,
1268c0984e5SSebastian Reichel union power_supply_propval *val)
1278c0984e5SSebastian Reichel {
1288c0984e5SSebastian Reichel struct tps65090_charger *charger = power_supply_get_drvdata(psy);
1298c0984e5SSebastian Reichel
1308c0984e5SSebastian Reichel if (psp == POWER_SUPPLY_PROP_ONLINE) {
1318c0984e5SSebastian Reichel val->intval = charger->ac_online;
1328c0984e5SSebastian Reichel charger->prev_ac_online = charger->ac_online;
1338c0984e5SSebastian Reichel return 0;
1348c0984e5SSebastian Reichel }
1358c0984e5SSebastian Reichel return -EINVAL;
1368c0984e5SSebastian Reichel }
1378c0984e5SSebastian Reichel
tps65090_charger_isr(int irq,void * dev_id)1388c0984e5SSebastian Reichel static irqreturn_t tps65090_charger_isr(int irq, void *dev_id)
1398c0984e5SSebastian Reichel {
1408c0984e5SSebastian Reichel struct tps65090_charger *charger = dev_id;
1418c0984e5SSebastian Reichel int ret;
1428c0984e5SSebastian Reichel uint8_t status1 = 0;
1438c0984e5SSebastian Reichel uint8_t intrsts = 0;
1448c0984e5SSebastian Reichel
1458c0984e5SSebastian Reichel ret = tps65090_read(charger->dev->parent, TPS65090_REG_CG_STATUS1,
1468c0984e5SSebastian Reichel &status1);
1478c0984e5SSebastian Reichel if (ret < 0) {
1488c0984e5SSebastian Reichel dev_err(charger->dev, "%s(): Error in reading reg 0x%x\n",
1498c0984e5SSebastian Reichel __func__, TPS65090_REG_CG_STATUS1);
1508c0984e5SSebastian Reichel return IRQ_HANDLED;
1518c0984e5SSebastian Reichel }
1528c0984e5SSebastian Reichel msleep(75);
1538c0984e5SSebastian Reichel ret = tps65090_read(charger->dev->parent, TPS65090_REG_INTR_STS,
1548c0984e5SSebastian Reichel &intrsts);
1558c0984e5SSebastian Reichel if (ret < 0) {
1568c0984e5SSebastian Reichel dev_err(charger->dev, "%s(): Error in reading reg 0x%x\n",
1578c0984e5SSebastian Reichel __func__, TPS65090_REG_INTR_STS);
1588c0984e5SSebastian Reichel return IRQ_HANDLED;
1598c0984e5SSebastian Reichel }
1608c0984e5SSebastian Reichel
1618c0984e5SSebastian Reichel if (intrsts & TPS65090_VACG) {
1628c0984e5SSebastian Reichel ret = tps65090_enable_charging(charger);
1638c0984e5SSebastian Reichel if (ret < 0)
1648c0984e5SSebastian Reichel return IRQ_HANDLED;
1658c0984e5SSebastian Reichel charger->ac_online = 1;
1668c0984e5SSebastian Reichel } else {
1678c0984e5SSebastian Reichel charger->ac_online = 0;
1688c0984e5SSebastian Reichel }
1698c0984e5SSebastian Reichel
1708c0984e5SSebastian Reichel /* Clear interrupts. */
1718c0984e5SSebastian Reichel if (!charger->passive_mode) {
1728c0984e5SSebastian Reichel ret = tps65090_write(charger->dev->parent,
1738c0984e5SSebastian Reichel TPS65090_REG_INTR_STS, 0x00);
1748c0984e5SSebastian Reichel if (ret < 0) {
1758c0984e5SSebastian Reichel dev_err(charger->dev,
1768c0984e5SSebastian Reichel "%s(): Error in writing reg 0x%x\n",
1778c0984e5SSebastian Reichel __func__, TPS65090_REG_INTR_STS);
1788c0984e5SSebastian Reichel }
1798c0984e5SSebastian Reichel }
1808c0984e5SSebastian Reichel
1818c0984e5SSebastian Reichel if (charger->prev_ac_online != charger->ac_online)
1828c0984e5SSebastian Reichel power_supply_changed(charger->ac);
1838c0984e5SSebastian Reichel
1848c0984e5SSebastian Reichel return IRQ_HANDLED;
1858c0984e5SSebastian Reichel }
1868c0984e5SSebastian Reichel
1878c0984e5SSebastian Reichel static struct tps65090_platform_data *
tps65090_parse_dt_charger_data(struct platform_device * pdev)1888c0984e5SSebastian Reichel tps65090_parse_dt_charger_data(struct platform_device *pdev)
1898c0984e5SSebastian Reichel {
1908c0984e5SSebastian Reichel struct tps65090_platform_data *pdata;
1918c0984e5SSebastian Reichel struct device_node *np = pdev->dev.of_node;
1928c0984e5SSebastian Reichel unsigned int prop;
1938c0984e5SSebastian Reichel
1948c0984e5SSebastian Reichel pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
1958c0984e5SSebastian Reichel if (!pdata) {
1968c0984e5SSebastian Reichel dev_err(&pdev->dev, "Memory alloc for tps65090_pdata failed\n");
1978c0984e5SSebastian Reichel return NULL;
1988c0984e5SSebastian Reichel }
1998c0984e5SSebastian Reichel
2008c0984e5SSebastian Reichel prop = of_property_read_bool(np, "ti,enable-low-current-chrg");
2018c0984e5SSebastian Reichel pdata->enable_low_current_chrg = prop;
2028c0984e5SSebastian Reichel
2038c0984e5SSebastian Reichel pdata->irq_base = -1;
2048c0984e5SSebastian Reichel
2058c0984e5SSebastian Reichel return pdata;
2068c0984e5SSebastian Reichel
2078c0984e5SSebastian Reichel }
2088c0984e5SSebastian Reichel
tps65090_charger_poll_task(void * data)2098c0984e5SSebastian Reichel static int tps65090_charger_poll_task(void *data)
2108c0984e5SSebastian Reichel {
2118c0984e5SSebastian Reichel set_freezable();
2128c0984e5SSebastian Reichel
2138c0984e5SSebastian Reichel while (!kthread_should_stop()) {
2148c0984e5SSebastian Reichel schedule_timeout_interruptible(POLL_INTERVAL);
2158c0984e5SSebastian Reichel try_to_freeze();
2168c0984e5SSebastian Reichel tps65090_charger_isr(-1, data);
2178c0984e5SSebastian Reichel }
2188c0984e5SSebastian Reichel return 0;
2198c0984e5SSebastian Reichel }
2208c0984e5SSebastian Reichel
2218c0984e5SSebastian Reichel static const struct power_supply_desc tps65090_charger_desc = {
2228c0984e5SSebastian Reichel .name = "tps65090-ac",
2238c0984e5SSebastian Reichel .type = POWER_SUPPLY_TYPE_MAINS,
2248c0984e5SSebastian Reichel .get_property = tps65090_ac_get_property,
2258c0984e5SSebastian Reichel .properties = tps65090_ac_props,
2268c0984e5SSebastian Reichel .num_properties = ARRAY_SIZE(tps65090_ac_props),
2278c0984e5SSebastian Reichel };
2288c0984e5SSebastian Reichel
tps65090_charger_probe(struct platform_device * pdev)2298c0984e5SSebastian Reichel static int tps65090_charger_probe(struct platform_device *pdev)
2308c0984e5SSebastian Reichel {
2318c0984e5SSebastian Reichel struct tps65090_charger *cdata;
2328c0984e5SSebastian Reichel struct tps65090_platform_data *pdata;
2338c0984e5SSebastian Reichel struct power_supply_config psy_cfg = {};
2348c0984e5SSebastian Reichel uint8_t status1 = 0;
2358c0984e5SSebastian Reichel int ret;
2368c0984e5SSebastian Reichel int irq;
2378c0984e5SSebastian Reichel
2388c0984e5SSebastian Reichel pdata = dev_get_platdata(pdev->dev.parent);
2398c0984e5SSebastian Reichel
2408c0984e5SSebastian Reichel if (IS_ENABLED(CONFIG_OF) && !pdata && pdev->dev.of_node)
2418c0984e5SSebastian Reichel pdata = tps65090_parse_dt_charger_data(pdev);
2428c0984e5SSebastian Reichel
2438c0984e5SSebastian Reichel if (!pdata) {
2448c0984e5SSebastian Reichel dev_err(&pdev->dev, "%s():no platform data available\n",
2458c0984e5SSebastian Reichel __func__);
2468c0984e5SSebastian Reichel return -ENODEV;
2478c0984e5SSebastian Reichel }
2488c0984e5SSebastian Reichel
2498c0984e5SSebastian Reichel cdata = devm_kzalloc(&pdev->dev, sizeof(*cdata), GFP_KERNEL);
2508c0984e5SSebastian Reichel if (!cdata) {
2518c0984e5SSebastian Reichel dev_err(&pdev->dev, "failed to allocate memory status\n");
2528c0984e5SSebastian Reichel return -ENOMEM;
2538c0984e5SSebastian Reichel }
2548c0984e5SSebastian Reichel
2558c0984e5SSebastian Reichel platform_set_drvdata(pdev, cdata);
2568c0984e5SSebastian Reichel
2578c0984e5SSebastian Reichel cdata->dev = &pdev->dev;
2588c0984e5SSebastian Reichel cdata->pdata = pdata;
2598c0984e5SSebastian Reichel
2608c0984e5SSebastian Reichel psy_cfg.supplied_to = pdata->supplied_to;
2618c0984e5SSebastian Reichel psy_cfg.num_supplicants = pdata->num_supplicants;
2628c0984e5SSebastian Reichel psy_cfg.of_node = pdev->dev.of_node;
2638c0984e5SSebastian Reichel psy_cfg.drv_data = cdata;
2648c0984e5SSebastian Reichel
2658c0984e5SSebastian Reichel cdata->ac = power_supply_register(&pdev->dev, &tps65090_charger_desc,
2668c0984e5SSebastian Reichel &psy_cfg);
2678c0984e5SSebastian Reichel if (IS_ERR(cdata->ac)) {
2688c0984e5SSebastian Reichel dev_err(&pdev->dev, "failed: power supply register\n");
2698c0984e5SSebastian Reichel return PTR_ERR(cdata->ac);
2708c0984e5SSebastian Reichel }
2718c0984e5SSebastian Reichel
2728c0984e5SSebastian Reichel irq = platform_get_irq(pdev, 0);
2738c0984e5SSebastian Reichel if (irq < 0)
2748c0984e5SSebastian Reichel irq = -ENXIO;
2758c0984e5SSebastian Reichel cdata->irq = irq;
2768c0984e5SSebastian Reichel
2778c0984e5SSebastian Reichel ret = tps65090_config_charger(cdata);
2788c0984e5SSebastian Reichel if (ret < 0) {
2798c0984e5SSebastian Reichel dev_err(&pdev->dev, "charger config failed, err %d\n", ret);
2808c0984e5SSebastian Reichel goto fail_unregister_supply;
2818c0984e5SSebastian Reichel }
2828c0984e5SSebastian Reichel
2838c0984e5SSebastian Reichel /* Check for charger presence */
2848c0984e5SSebastian Reichel ret = tps65090_read(cdata->dev->parent, TPS65090_REG_CG_STATUS1,
2858c0984e5SSebastian Reichel &status1);
2868c0984e5SSebastian Reichel if (ret < 0) {
2878c0984e5SSebastian Reichel dev_err(cdata->dev, "%s(): Error in reading reg 0x%x", __func__,
2888c0984e5SSebastian Reichel TPS65090_REG_CG_STATUS1);
2898c0984e5SSebastian Reichel goto fail_unregister_supply;
2908c0984e5SSebastian Reichel }
2918c0984e5SSebastian Reichel
2928c0984e5SSebastian Reichel if (status1 != 0) {
2938c0984e5SSebastian Reichel ret = tps65090_enable_charging(cdata);
2948c0984e5SSebastian Reichel if (ret < 0) {
2958c0984e5SSebastian Reichel dev_err(cdata->dev, "error enabling charger\n");
2968c0984e5SSebastian Reichel goto fail_unregister_supply;
2978c0984e5SSebastian Reichel }
2988c0984e5SSebastian Reichel cdata->ac_online = 1;
2998c0984e5SSebastian Reichel power_supply_changed(cdata->ac);
3008c0984e5SSebastian Reichel }
3018c0984e5SSebastian Reichel
3028c0984e5SSebastian Reichel if (irq != -ENXIO) {
3038c0984e5SSebastian Reichel ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
3042469b836Sdongjian tps65090_charger_isr, IRQF_ONESHOT, "tps65090-charger", cdata);
3058c0984e5SSebastian Reichel if (ret) {
3068c0984e5SSebastian Reichel dev_err(cdata->dev,
3078c0984e5SSebastian Reichel "Unable to register irq %d err %d\n", irq,
3088c0984e5SSebastian Reichel ret);
3098c0984e5SSebastian Reichel goto fail_unregister_supply;
3108c0984e5SSebastian Reichel }
3118c0984e5SSebastian Reichel } else {
3128c0984e5SSebastian Reichel cdata->poll_task = kthread_run(tps65090_charger_poll_task,
3138c0984e5SSebastian Reichel cdata, "ktps65090charger");
3148c0984e5SSebastian Reichel cdata->passive_mode = true;
3158c0984e5SSebastian Reichel if (IS_ERR(cdata->poll_task)) {
3168c0984e5SSebastian Reichel ret = PTR_ERR(cdata->poll_task);
3178c0984e5SSebastian Reichel dev_err(cdata->dev,
3188c0984e5SSebastian Reichel "Unable to run kthread err %d\n", ret);
3198c0984e5SSebastian Reichel goto fail_unregister_supply;
3208c0984e5SSebastian Reichel }
3218c0984e5SSebastian Reichel }
3228c0984e5SSebastian Reichel
3238c0984e5SSebastian Reichel return 0;
3248c0984e5SSebastian Reichel
3258c0984e5SSebastian Reichel fail_unregister_supply:
3268c0984e5SSebastian Reichel power_supply_unregister(cdata->ac);
3278c0984e5SSebastian Reichel
3288c0984e5SSebastian Reichel return ret;
3298c0984e5SSebastian Reichel }
3308c0984e5SSebastian Reichel
tps65090_charger_remove(struct platform_device * pdev)3318c0984e5SSebastian Reichel static int tps65090_charger_remove(struct platform_device *pdev)
3328c0984e5SSebastian Reichel {
3338c0984e5SSebastian Reichel struct tps65090_charger *cdata = platform_get_drvdata(pdev);
3348c0984e5SSebastian Reichel
3358c0984e5SSebastian Reichel if (cdata->irq == -ENXIO)
3368c0984e5SSebastian Reichel kthread_stop(cdata->poll_task);
3378c0984e5SSebastian Reichel power_supply_unregister(cdata->ac);
3388c0984e5SSebastian Reichel
3398c0984e5SSebastian Reichel return 0;
3408c0984e5SSebastian Reichel }
3418c0984e5SSebastian Reichel
3428c0984e5SSebastian Reichel static const struct of_device_id of_tps65090_charger_match[] = {
3438c0984e5SSebastian Reichel { .compatible = "ti,tps65090-charger", },
3448c0984e5SSebastian Reichel { /* end */ }
3458c0984e5SSebastian Reichel };
3468c0984e5SSebastian Reichel MODULE_DEVICE_TABLE(of, of_tps65090_charger_match);
3478c0984e5SSebastian Reichel
3488c0984e5SSebastian Reichel static struct platform_driver tps65090_charger_driver = {
3498c0984e5SSebastian Reichel .driver = {
3508c0984e5SSebastian Reichel .name = "tps65090-charger",
3518c0984e5SSebastian Reichel .of_match_table = of_tps65090_charger_match,
3528c0984e5SSebastian Reichel },
3538c0984e5SSebastian Reichel .probe = tps65090_charger_probe,
3548c0984e5SSebastian Reichel .remove = tps65090_charger_remove,
3558c0984e5SSebastian Reichel };
3568c0984e5SSebastian Reichel module_platform_driver(tps65090_charger_driver);
3578c0984e5SSebastian Reichel
3588c0984e5SSebastian Reichel MODULE_LICENSE("GPL v2");
3598c0984e5SSebastian Reichel MODULE_AUTHOR("Syed Rafiuddin <srafiuddin@nvidia.com>");
3608c0984e5SSebastian Reichel MODULE_DESCRIPTION("tps65090 battery charger driver");
361