From d9105c2b01eedb620cae96073dde4f760367817f Mon Sep 17 00:00:00 2001 From: Marek VaĊĦut <marek.vasut@gmail.com> Date: Sun, 3 Aug 2008 21:34:08 +0100 Subject: [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/ucb1400_core.c | 106 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 drivers/mfd/ucb1400_core.c (limited to 'drivers/mfd/ucb1400_core.c') diff --git a/drivers/mfd/ucb1400_core.c b/drivers/mfd/ucb1400_core.c new file mode 100644 index 00000000000..178159e264c --- /dev/null +++ b/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"); -- cgit v1.2.3-18-g5258