[ARM] 5184/1: Split ucb1400_ts into core and touchscreen

This patch splits ucb1400_ts into ucb1400_ts and ucb1400_core.
Since this chip supports more features than only touchscreen,
it was necessary to prepare it for feature addition. The
previous functionality is preserved by applying this patch.

[Build fixes for non-ARM by Stephen Rothwell and Takashi Iwai]

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/mfd/Kconfig

@@ -50,6 +50,15 @@ config HTC_PASIC3
 	  HTC Magician devices, respectively. Actual functionality is
 	  handled by the leds-pasic3 and ds1wm drivers.
 
+config UCB1400_CORE
+	tristate "Philips UCB1400 Core driver"
+	help
+	  This enables support for the Philips UCB1400 core functions.
+	  The UCB1400 is an AC97 audio codec.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ucb1400_core.
+
 config MFD_TC6393XB
 	bool "Support Toshiba TC6393XB"
 	depends on GPIOLIB && ARM

drivers/mfd/Makefile

@@ -20,3 +20,4 @@ obj-$(CONFIG_MCP_UCB1200_TS)	+= ucb1x00-ts.o
 ifeq ($(CONFIG_SA1100_ASSABET),y)
 obj-$(CONFIG_MCP_UCB1200)	+= ucb1x00-assabet.o
 endif
+obj-$(CONFIG_UCB1400_CORE)	+= ucb1400_core.o

drivers/mfd/ucb1400_core.c

@@ -0,0 +1,106 @@
+/*
+ * Core functions for:
+ *  Philips UCB1400 multifunction chip
+ *
+ * Based on ucb1400_ts.c:
+ *  Author:	Nicolas Pitre
+ *  Created:	September 25, 2006
+ *  Copyright:	MontaVista Software, Inc.
+ *
+ * Spliting done by: Marek Vasut <marek.vasut@gmail.com>
+ * If something doesnt work and it worked before spliting, e-mail me,
+ * dont bother Nicolas please ;-)
+ *
+ * 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 code is heavily based on ucb1x00-*.c copyrighted by Russell King
+ * covering the UCB1100, UCB1200 and UCB1300..  Support for the UCB1400 has
+ * been made separate from ucb1x00-core/ucb1x00-ts on Russell's request.
+ */
+
+#include <linux/module.h>
+#include <linux/ucb1400.h>
+
+static int ucb1400_core_probe(struct device *dev)
+{
+	int err;
+	struct ucb1400 *ucb;
+	struct ucb1400_ts ucb_ts;
+	struct snd_ac97 *ac97;
+
+	memset(&ucb_ts, 0, sizeof(ucb_ts));
+
+	ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL);
+	if (!ucb) {
+		err = -ENOMEM;
+		goto err;
+	}
+
+	dev_set_drvdata(dev, ucb);
+
+	ac97 = to_ac97_t(dev);
+
+	ucb_ts.id = ucb1400_reg_read(ac97, UCB_ID);
+	if (ucb_ts.id != UCB_ID_1400) {
+		err = -ENODEV;
+		goto err0;
+	}
+
+	/* TOUCHSCREEN */
+	ucb_ts.ac97 = ac97;
+	ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1);
+	if (!ucb->ucb1400_ts) {
+		err = -ENOMEM;
+		goto err0;
+	}
+	err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts,
+					sizeof(ucb_ts));
+	if (err)
+		goto err1;
+	err = platform_device_add(ucb->ucb1400_ts);
+	if (err)
+		goto err1;
+
+	return 0;
+
+err1:
+	platform_device_put(ucb->ucb1400_ts);
+err0:
+	kfree(ucb);
+err:
+	return err;
+}
+
+static int ucb1400_core_remove(struct device *dev)
+{
+	struct ucb1400 *ucb = dev_get_drvdata(dev);
+
+	platform_device_unregister(ucb->ucb1400_ts);
+	kfree(ucb);
+	return 0;
+}
+
+static struct device_driver ucb1400_core_driver = {
+	.name	= "ucb1400_core",
+	.bus	= &ac97_bus_type,
+	.probe	= ucb1400_core_probe,
+	.remove	= ucb1400_core_remove,
+};
+
+static int __init ucb1400_core_init(void)
+{
+	return driver_register(&ucb1400_core_driver);
+}
+
+static void __exit ucb1400_core_exit(void)
+{
+	driver_unregister(&ucb1400_core_driver);
+}
+
+module_init(ucb1400_core_init);
+module_exit(ucb1400_core_exit);
+
+MODULE_DESCRIPTION("Philips UCB1400 driver");
+MODULE_LICENSE("GPL");