3 files changed, 101 insertions, 0 deletions

diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
new file mode 100644
index 000000000000..e7cf84f0751a
--- /dev/null
+++ b/drivers/usb/phy/Kconfig
@@ -0,0 +1,17 @@
+#
+# Physical Layer USB driver configuration
+#
+comment "USB Physical Layer drivers"
+        depends on USB || USB_GADGET
+
+config USB_ISP1301
+        tristate "NXP ISP1301 USB transceiver support"
+        depends on USB || USB_GADGET
+        depends on I2C
+        help
+          Say Y here to add support for the NXP ISP1301 USB transceiver driver.
+          This chip is typically used as USB transceiver for USB host, gadget
+          and OTG drivers (to be selected separately).
+
+          To compile this driver as a module, choose M here: the
+          module will be called isp1301.
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
new file mode 100644
index 000000000000..eca095b1a890
--- /dev/null
+++ b/drivers/usb/phy/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for physical layer USB drivers
+#
+
+ccflags-$(CONFIG_USB_DEBUG) := -DDEBUG
+
+obj-$(CONFIG_USB_ISP1301)               += isp1301.o
diff --git a/drivers/usb/phy/isp1301.c b/drivers/usb/phy/isp1301.c
new file mode 100644
index 000000000000..b19f4932a037
--- /dev/null
+++ b/drivers/usb/phy/isp1301.c
@@ -0,0 +1,77 @@
+/*
+ * NXP ISP1301 USB transceiver driver
+ *
+ * Copyright (C) 2012 Roland Stigge
+ *
+ * Author: Roland Stigge <stigge@antcom.de>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+
+#define DRV_NAME                "isp1301"
+
+#define ISP1301_I2C_ADDR        0x2C
+
+static const unsigned short normal_i2c[] = {
+        ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END
+};
+
+static const struct i2c_device_id isp1301_id[] = {
+        { "isp1301", 0 },
+        { }
+};
+
+static struct i2c_client *isp1301_i2c_client;
+
+static int isp1301_probe(struct i2c_client *client,
+                         const struct i2c_device_id *i2c_id)
+{
+        isp1301_i2c_client = client;
+        return 0;
+}
+
+static int isp1301_remove(struct i2c_client *client)
+{
+        return 0;
+}
+
+static struct i2c_driver isp1301_driver = {
+        .driver = {
+                .name = DRV_NAME,
+        },
+        .probe = isp1301_probe,
+        .remove = isp1301_remove,
+        .id_table = isp1301_id,
+};
+
+module_i2c_driver(isp1301_driver);
+
+static int match(struct device *dev, void *data)
+{
+        struct device_node *node = (struct device_node *)data;
+        return (dev->of_node == node) &&
+                (dev->driver == &isp1301_driver.driver);
+}
+
+struct i2c_client *isp1301_get_client(struct device_node *node)
+{
+        if (node) { /* reference of ISP1301 I2C node via DT */
+                struct device *dev = bus_find_device(&i2c_bus_type, NULL,
+                                                     node, match);
+                if (!dev)
+                        return NULL;
+                return to_i2c_client(dev);
+        } else { /* non-DT: only one ISP1301 chip supported */
+                return isp1301_i2c_client;
+        }
+}
+EXPORT_SYMBOL_GPL(isp1301_get_client);
+
+MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
+MODULE_DESCRIPTION("NXP ISP1301 USB transceiver driver");
+MODULE_LICENSE("GPL");