1 files changed, 126 insertions, 0 deletions
diff --git a/drivers/platform/msm/qpnp-usbdetect.c b/drivers/platform/msm/qpnp-usbdetect.c
new file mode 100644
index 00000000000..9715553dae6
--- /dev/null
+++ b/drivers/platform/msm/qpnp-usbdetect.c
@@ -0,0 +1,126 @@
+/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only 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/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/of_platform.h>
+#include <linux/interrupt.h>
+#include <linux/power_supply.h>
+#include <linux/regulator/consumer.h>
+
+struct qpnp_usbdetect {
+	struct platform_device	*pdev;
+	struct regulator	*vin;
+	struct power_supply	*usb_psy;
+	int			vbus_det_irq;
+};
+
+static irqreturn_t qpnp_usbdetect_vbus_irq(int irq, void *data)
+{
+	struct qpnp_usbdetect *usb = data;
+	int vbus;
+
+	vbus = !!irq_read_line(irq);
+	power_supply_set_present(usb->usb_psy, vbus);
+
+	return IRQ_HANDLED;
+}
+
+static int qpnp_usbdetect_probe(struct platform_device *pdev)
+{
+	struct qpnp_usbdetect *usb;
+	struct power_supply *usb_psy;
+	int rc;
+
+	usb_psy = power_supply_get_by_name("usb");
+	if (!usb_psy) {
+		dev_dbg(&pdev->dev, "USB power_supply not found, deferring probe\n");
+		return -EPROBE_DEFER;
+	}
+
+	usb = devm_kzalloc(&pdev->dev, sizeof(*usb), GFP_KERNEL);
+	if (!usb)
+		return -ENOMEM;
+
+	usb->pdev = pdev;
+	usb->usb_psy = usb_psy;
+
+	usb->vin = devm_regulator_get(&pdev->dev, "vin");
+	if (IS_ERR(usb->vin)) {
+		dev_err(&pdev->dev, "Failed to get VIN regulator: %ld\n",
+			PTR_ERR(usb->vin));
+		return PTR_ERR(usb->vin);
+	}
+
+	rc = regulator_enable(usb->vin);
+	if (rc) {
+		dev_err(&pdev->dev, "Failed to enable VIN regulator: %d\n", rc);
+		return rc;
+	}
+
+	usb->vbus_det_irq = platform_get_irq_byname(pdev, "vbus_det_irq");
+	if (usb->vbus_det_irq < 0) {
+		regulator_disable(usb->vin);
+		return usb->vbus_det_irq;
+	}
+
+	rc = devm_request_irq(&pdev->dev, usb->vbus_det_irq,
+			      qpnp_usbdetect_vbus_irq,
+			      IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+			      "vbus_det_irq", usb);
+	if (rc) {
+		dev_err(&pdev->dev, "request for vbus_det_irq failed: %d\n",
+			rc);
+		regulator_disable(usb->vin);
+		return rc;
+	}
+
+	enable_irq_wake(usb->vbus_det_irq);
+	dev_set_drvdata(&pdev->dev, usb);
+
+	return 0;
+}
+
+static int qpnp_usbdetect_remove(struct platform_device *pdev)
+{
+	struct qpnp_usbdetect *usb = dev_get_drvdata(&pdev->dev);
+
+	disable_irq_wake(usb->vbus_det_irq);
+	disable_irq(usb->vbus_det_irq);
+	regulator_disable(usb->vin);
+
+	return 0;
+}
+
+static struct of_device_id of_match_table[] = {
+	{	.compatible = "qcom,qpnp-usbdetect",
+	}
+};
+
+static struct platform_driver qpnp_usbdetect_driver = {
+	.driver		= {
+		.name	= "qcom,qpnp-usbdetect",
+		.of_match_table = of_match_table,
+	},
+	.probe		= qpnp_usbdetect_probe,
+	.remove		= qpnp_usbdetect_remove,
+};
+
+module_driver(qpnp_usbdetect_driver, platform_driver_register,
+		platform_driver_unregister);
+
+MODULE_DESCRIPTION("QPNP PMIC USB VBUS Detection driver");
+MODULE_LICENSE("GPL v2");