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path: root/drivers/usb/phy/isp1301.c
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Diffstat (limited to 'drivers/usb/phy/isp1301.c')
-rw-r--r--drivers/usb/phy/isp1301.c77
1 files changed, 77 insertions, 0 deletions
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");