--- /dev/null
+/*
+ * drivers/mfd/rt5036-irq.c
+ * Driver for Richtek RT5036 PMIC IRQ driver
+ *
+ * Copyright (C) 2014 Richtek Technology Corp.
+ * cy_huang <cy_huang@richtek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/of_gpio.h>
+#include <linux/workqueue.h>
+#include <linux/interrupt.h>
+
+#include <linux/mfd/rt5036/rt5036.h>
+#include <linux/mfd/rt5036/rt5036-irq.h>
+
+struct rt5036_irq_info {
+ struct i2c_client *i2c;
+ struct rt5036_chip *chip;
+ struct device *dev;
+ int irq;
+ unsigned char suspend:1;
+ struct delayed_work irq_delayed_work;
+};
+
+static irqreturn_t rt5036_irq_handler(int irqno, void *param)
+{
+ struct rt5036_irq_info *ii = param;
+ unsigned char regval[3];
+ unsigned int irq_event;
+ int ret = 0;
+
+ if (ii->suspend) {
+ schedule_delayed_work(&ii->irq_delayed_work,
+ msecs_to_jiffies(10));
+ goto irq_fin;
+ }
+
+ ret =
+ rt5036_reg_block_read(ii->i2c, RT5036_REG_CHGIRQ1,
+ ARRAY_SIZE(regval), regval);
+ if (ret < 0) {
+ dev_err(ii->dev, "read charger irq event fail\n");
+ } else {
+ irq_event = regval[0] << 16 | regval[1] << 8 | regval[2];
+ RTINFO("chg event %06x\n", irq_event);
+#ifdef CONFIG_CHARGER_RT5036
+ if (irq_event && ii->chip->chg_info)
+ rt5036_charger_irq_handler(ii->chip->chg_info,
+ irq_event);
+#endif /* #ifdef CONFIG_CHARGER_RT5036 */
+ }
+
+ ret =
+ rt5036_reg_block_read(ii->i2c, RT5036_REG_BUCKLDOIRQ,
+ ARRAY_SIZE(regval), regval);
+ if (ret < 0) {
+ dev_err(ii->dev, "read misc irq event fail\n");
+ } else {
+ irq_event = regval[0] << 16 | regval[1] << 8 | regval[2];
+ RTINFO("misc event %06x\n", irq_event);
+#ifdef CONFIG_MISC_RT5036
+ if (irq_event && ii->chip->misc_info)
+ rt5036_misc_irq_handler(ii->chip->misc_info, irq_event);
+#endif /* #ifdef CONFIG_MISC_RT5036 */
+ }
+
+ ret = rt5036_reg_read(ii->i2c, RT5036_REG_STBWACKIRQ);
+ if (ret < 0) {
+ dev_err(ii->dev, "read rtc irq event fail\n");
+ } else {
+ irq_event = ret;
+ RTINFO("rtc event %02x\n", irq_event);
+#ifdef CONFIG_RTC_RT5036
+ if (irq_event && ii->chip->rtc_info)
+ rt5036_rtc_irq_handler(ii->chip->rtc_info, irq_event);
+#endif /* #ifdef CONFIG_RTC_RT5036 */
+ }
+ rt5036_set_bits(ii->i2c, RT5036_REG_BUCKVN1, RT5036_IRQPREZ_MASK);
+irq_fin:
+ return IRQ_HANDLED;
+}
+
+static void rt5036_irq_delayed_work(struct work_struct *work)
+{
+ struct rt5036_irq_info *ii =
+ (struct rt5036_irq_info *)container_of(work, struct rt5036_irq_info,
+ irq_delayed_work.work);
+ rt5036_irq_handler(ii->irq, ii);
+}
+
+static int rt_parse_dt(struct rt5036_irq_info *ii, struct device *dev)
+{
+#ifdef CONFIG_OF
+ struct device_node *np = dev->of_node;
+ int val;
+
+ val = of_get_named_gpio(np, "rt,irq-gpio", 0);
+ if (gpio_is_valid(val)) {
+ if (gpio_request(val, "rt5036_irq") >= 0) {
+ gpio_direction_input(val);
+ ii->irq = gpio_to_irq(val);
+ } else {
+ ii->irq = -1;
+ }
+ } else {
+ ii->irq = -1;
+ }
+#endif /* #ifdef CONFIG_OF */
+ RTINFO("\n");
+ return 0;
+}
+
+static int rt_parse_pdata(struct rt5036_irq_info *ii,
+ struct device *dev)
+{
+ struct rt5036_irq_data *pdata = dev->platform_data;
+
+ if (gpio_is_valid(pdata->irq_gpio)) {
+ if (gpio_request(pdata->irq_gpio, "rt5036_irq") >= 0) {
+ gpio_direction_input(pdata->irq_gpio);
+ ii->irq = gpio_to_irq(pdata->irq_gpio);
+ } else {
+ ii->irq = -1;
+ }
+ } else {
+ ii->irq = -1;
+ }
+ RTINFO("\n");
+ return 0;
+}
+
+static int rt5036_irq_probe(struct platform_device *pdev)
+{
+ struct rt5036_chip *chip = dev_get_drvdata(pdev->dev.parent);
+ struct rt5036_platform_data *pdata = (pdev->dev.parent)->platform_data;
+ struct rt5036_irq_info *ii;
+ bool use_dt = pdev->dev.of_node;
+
+ ii = devm_kzalloc(&pdev->dev, sizeof(*ii), GFP_KERNEL);
+ if (!ii)
+ return -ENOMEM;
+
+ ii->i2c = chip->i2c;
+ ii->chip = chip;
+ ii->dev = &pdev->dev;
+ if (use_dt) {
+ rt_parse_dt(ii, &pdev->dev);
+ } else {
+ if (!pdata)
+ goto out_dev;
+ pdev->dev.platform_data = pdata->irq_pdata;
+ rt_parse_pdata(ii, &pdev->dev);
+ dev_info(&pdev->dev, "ii->irq %d\n", ii->irq);
+ }
+ INIT_DELAYED_WORK(&ii->irq_delayed_work, rt5036_irq_delayed_work);
+
+ platform_set_drvdata(pdev, ii);
+ if (ii->irq >= 0) {
+ if (devm_request_irq
+ (&pdev->dev, ii->irq, rt5036_irq_handler,
+ IRQF_TRIGGER_FALLING | IRQF_NO_SUSPEND | IRQF_DISABLED,
+ "rt5036_irq", ii)) {
+ dev_err(&pdev->dev, "request threaded irq fail\n");
+ goto out_dev;
+ }
+ enable_irq_wake(ii->irq);
+ schedule_delayed_work(&ii->irq_delayed_work,
+ msecs_to_jiffies(500));
+ }
+ dev_info(&pdev->dev, "driver successfully loaded\n");
+ return 0;
+out_dev:
+ return -EINVAL;
+}
+
+static int rt5036_irq_remove(struct platform_device *pdev)
+{
+ struct rt5036_irq_info *ii = platform_get_drvdata(pdev);
+
+ if (ii->irq >= 0)
+ devm_free_irq(&pdev->dev, ii->irq, ii);
+ return 0;
+}
+
+static int rt5036_irq_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct rt5036_irq_info *ii = platform_get_drvdata(pdev);
+
+ ii->suspend = 1;
+ return 0;
+}
+
+static int rt5036_irq_resume(struct platform_device *pdev)
+{
+ struct rt5036_irq_info *ii = platform_get_drvdata(pdev);
+
+ ii->suspend = 0;
+ return 0;
+}
+
+static const struct of_device_id rt_match_table[] = {
+ {.compatible = "rt,rt5036-irq",},
+ {},
+};
+
+static struct platform_driver rt5036_irq_driver = {
+ .driver = {
+ .name = RT5036_DEV_NAME "-irq",
+ .owner = THIS_MODULE,
+ .of_match_table = rt_match_table,
+ },
+ .probe = rt5036_irq_probe,
+ .remove = rt5036_irq_remove,
+ .suspend = rt5036_irq_suspend,
+ .resume = rt5036_irq_resume,
+};
+
+static int __init rt5036_irq_init(void)
+{
+ return platform_driver_register(&rt5036_irq_driver);
+}
+subsys_initcall_sync(rt5036_irq_init);
+
+static void __exit rt5036_irq_exit(void)
+{
+ platform_driver_unregister(&rt5036_irq_driver);
+}
+module_exit(rt5036_irq_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("CY Huang <cy_huang@richtek.com");
+MODULE_DESCRIPTION("IRQ driver for RT5036");
+MODULE_ALIAS("platform:" RT5036_DEV_NAME "-irq");
+MODULE_VERSION(RT5036_DRV_VER);
projects / firefly-linux-kernel-4.4.55.git / blobdiff