v4.19.13 snapshot.
diff --git a/drivers/extcon/extcon-qcom-spmi-misc.c b/drivers/extcon/extcon-qcom-spmi-misc.c
new file mode 100644
index 0000000..72bc0f2
--- /dev/null
+++ b/drivers/extcon/extcon-qcom-spmi-misc.c
@@ -0,0 +1,171 @@
+/**
+ * extcon-qcom-spmi-misc.c - Qualcomm USB extcon driver to support USB ID
+ * detection based on extcon-usb-gpio.c.
+ *
+ * Copyright (C) 2016 Linaro, Ltd.
+ * Stephen Boyd <stephen.boyd@linaro.org>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that 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.
+ */
+
+#include <linux/extcon-provider.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+
+#define USB_ID_DEBOUNCE_MS 5 /* ms */
+
+struct qcom_usb_extcon_info {
+ struct extcon_dev *edev;
+ int irq;
+ struct delayed_work wq_detcable;
+ unsigned long debounce_jiffies;
+};
+
+static const unsigned int qcom_usb_extcon_cable[] = {
+ EXTCON_USB_HOST,
+ EXTCON_NONE,
+};
+
+static void qcom_usb_extcon_detect_cable(struct work_struct *work)
+{
+ bool id;
+ int ret;
+ struct qcom_usb_extcon_info *info = container_of(to_delayed_work(work),
+ struct qcom_usb_extcon_info,
+ wq_detcable);
+
+ /* check ID and update cable state */
+ ret = irq_get_irqchip_state(info->irq, IRQCHIP_STATE_LINE_LEVEL, &id);
+ if (ret)
+ return;
+
+ extcon_set_state_sync(info->edev, EXTCON_USB_HOST, !id);
+}
+
+static irqreturn_t qcom_usb_irq_handler(int irq, void *dev_id)
+{
+ struct qcom_usb_extcon_info *info = dev_id;
+
+ queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+ info->debounce_jiffies);
+
+ return IRQ_HANDLED;
+}
+
+static int qcom_usb_extcon_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct qcom_usb_extcon_info *info;
+ int ret;
+
+ info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ info->edev = devm_extcon_dev_allocate(dev, qcom_usb_extcon_cable);
+ if (IS_ERR(info->edev)) {
+ dev_err(dev, "failed to allocate extcon device\n");
+ return -ENOMEM;
+ }
+
+ ret = devm_extcon_dev_register(dev, info->edev);
+ if (ret < 0) {
+ dev_err(dev, "failed to register extcon device\n");
+ return ret;
+ }
+
+ info->debounce_jiffies = msecs_to_jiffies(USB_ID_DEBOUNCE_MS);
+ INIT_DELAYED_WORK(&info->wq_detcable, qcom_usb_extcon_detect_cable);
+
+ info->irq = platform_get_irq_byname(pdev, "usb_id");
+ if (info->irq < 0)
+ return info->irq;
+
+ ret = devm_request_threaded_irq(dev, info->irq, NULL,
+ qcom_usb_irq_handler,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ pdev->name, info);
+ if (ret < 0) {
+ dev_err(dev, "failed to request handler for ID IRQ\n");
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, info);
+ device_init_wakeup(dev, 1);
+
+ /* Perform initial detection */
+ qcom_usb_extcon_detect_cable(&info->wq_detcable.work);
+
+ return 0;
+}
+
+static int qcom_usb_extcon_remove(struct platform_device *pdev)
+{
+ struct qcom_usb_extcon_info *info = platform_get_drvdata(pdev);
+
+ cancel_delayed_work_sync(&info->wq_detcable);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int qcom_usb_extcon_suspend(struct device *dev)
+{
+ struct qcom_usb_extcon_info *info = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (device_may_wakeup(dev))
+ ret = enable_irq_wake(info->irq);
+
+ return ret;
+}
+
+static int qcom_usb_extcon_resume(struct device *dev)
+{
+ struct qcom_usb_extcon_info *info = dev_get_drvdata(dev);
+ int ret = 0;
+
+ if (device_may_wakeup(dev))
+ ret = disable_irq_wake(info->irq);
+
+ return ret;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(qcom_usb_extcon_pm_ops,
+ qcom_usb_extcon_suspend, qcom_usb_extcon_resume);
+
+static const struct of_device_id qcom_usb_extcon_dt_match[] = {
+ { .compatible = "qcom,pm8941-misc", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, qcom_usb_extcon_dt_match);
+
+static struct platform_driver qcom_usb_extcon_driver = {
+ .probe = qcom_usb_extcon_probe,
+ .remove = qcom_usb_extcon_remove,
+ .driver = {
+ .name = "extcon-pm8941-misc",
+ .pm = &qcom_usb_extcon_pm_ops,
+ .of_match_table = qcom_usb_extcon_dt_match,
+ },
+};
+module_platform_driver(qcom_usb_extcon_driver);
+
+MODULE_DESCRIPTION("QCOM USB ID extcon driver");
+MODULE_AUTHOR("Stephen Boyd <stephen.boyd@linaro.org>");
+MODULE_LICENSE("GPL v2");