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https://github.com/edk2-porting/linux-next.git
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d9105c2b01
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>
107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
/*
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* Core functions for:
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* Philips UCB1400 multifunction chip
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*
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* Based on ucb1400_ts.c:
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* Author: Nicolas Pitre
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* Created: September 25, 2006
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* Copyright: MontaVista Software, Inc.
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*
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* Spliting done by: Marek Vasut <marek.vasut@gmail.com>
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* If something doesnt work and it worked before spliting, e-mail me,
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* dont bother Nicolas please ;-)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This code is heavily based on ucb1x00-*.c copyrighted by Russell King
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* covering the UCB1100, UCB1200 and UCB1300.. Support for the UCB1400 has
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* been made separate from ucb1x00-core/ucb1x00-ts on Russell's request.
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*/
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#include <linux/module.h>
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#include <linux/ucb1400.h>
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static int ucb1400_core_probe(struct device *dev)
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{
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int err;
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struct ucb1400 *ucb;
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struct ucb1400_ts ucb_ts;
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struct snd_ac97 *ac97;
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memset(&ucb_ts, 0, sizeof(ucb_ts));
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ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL);
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if (!ucb) {
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err = -ENOMEM;
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goto err;
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}
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dev_set_drvdata(dev, ucb);
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ac97 = to_ac97_t(dev);
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ucb_ts.id = ucb1400_reg_read(ac97, UCB_ID);
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if (ucb_ts.id != UCB_ID_1400) {
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err = -ENODEV;
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goto err0;
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}
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/* TOUCHSCREEN */
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ucb_ts.ac97 = ac97;
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ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1);
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if (!ucb->ucb1400_ts) {
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err = -ENOMEM;
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goto err0;
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}
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err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts,
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sizeof(ucb_ts));
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if (err)
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goto err1;
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err = platform_device_add(ucb->ucb1400_ts);
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if (err)
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goto err1;
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return 0;
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err1:
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platform_device_put(ucb->ucb1400_ts);
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err0:
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kfree(ucb);
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err:
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return err;
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}
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static int ucb1400_core_remove(struct device *dev)
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{
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struct ucb1400 *ucb = dev_get_drvdata(dev);
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platform_device_unregister(ucb->ucb1400_ts);
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kfree(ucb);
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return 0;
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}
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static struct device_driver ucb1400_core_driver = {
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.name = "ucb1400_core",
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.bus = &ac97_bus_type,
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.probe = ucb1400_core_probe,
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.remove = ucb1400_core_remove,
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};
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static int __init ucb1400_core_init(void)
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{
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return driver_register(&ucb1400_core_driver);
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}
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static void __exit ucb1400_core_exit(void)
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{
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driver_unregister(&ucb1400_core_driver);
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}
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module_init(ucb1400_core_init);
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module_exit(ucb1400_core_exit);
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MODULE_DESCRIPTION("Philips UCB1400 driver");
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MODULE_LICENSE("GPL");
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