diff options
Diffstat (limited to 'sound/ac97_bus.c')
| -rw-r--r-- | sound/ac97_bus.c | 35 |
1 files changed, 12 insertions, 23 deletions
diff --git a/sound/ac97_bus.c b/sound/ac97_bus.c index 52e4bc54c9ac..8a44297964f5 100644 --- a/sound/ac97_bus.c +++ b/sound/ac97_bus.c @@ -1,14 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Linux driver model AC97 bus interface * * Author: Nicolas Pitre * Created: Jan 14, 2005 * Copyright: (C) MontaVista Software Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. */ #include <linux/module.h> @@ -50,16 +46,19 @@ static bool snd_ac97_check_id(struct snd_ac97 *ac97, unsigned int id, * @id_mask: Mask that is applied to the device ID before comparing to @id * * This function resets the AC'97 device. If @try_warm is true the function - * first performs a warm reset. If the warm reset is successful the function - * returns 1. Otherwise or if @try_warm is false the function issues cold reset - * followed by a warm reset. If this is successful the function returns 0, - * otherwise a negative error code. If @id is 0 any valid device ID will be - * accepted, otherwise only the ID that matches @id and @id_mask is accepted. + * first performs a warm reset. If @try_warm is false the function issues + * cold reset followed by a warm reset. If @id is 0 any valid device ID + * will be accepted, otherwise only the ID that matches @id and @id_mask + * is accepted. + * Returns: + * * %1 - if warm reset is successful + * * %0 - if cold reset and warm reset is successful + * * %-ENODEV - if @id and @id_mask not matching */ int snd_ac97_reset(struct snd_ac97 *ac97, bool try_warm, unsigned int id, unsigned int id_mask) { - struct snd_ac97_bus_ops *ops = ac97->bus->ops; + const struct snd_ac97_bus_ops *ops = ac97->bus->ops; if (try_warm && ops->warm_reset) { ops->warm_reset(ac97); @@ -79,19 +78,8 @@ int snd_ac97_reset(struct snd_ac97 *ac97, bool try_warm, unsigned int id, } EXPORT_SYMBOL_GPL(snd_ac97_reset); -/* - * Let drivers decide whether they want to support given codec from their - * probe method. Drivers have direct access to the struct snd_ac97 - * structure and may decide based on the id field amongst other things. - */ -static int ac97_bus_match(struct device *dev, struct device_driver *drv) -{ - return 1; -} - -struct bus_type ac97_bus_type = { +const struct bus_type ac97_bus_type = { .name = "ac97", - .match = ac97_bus_match, }; static int __init ac97_bus_init(void) @@ -110,4 +98,5 @@ module_exit(ac97_bus_exit); EXPORT_SYMBOL(ac97_bus_type); +MODULE_DESCRIPTION("Legacy AC97 bus interface"); MODULE_LICENSE("GPL"); |