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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/sound/ppc/keywest.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/sound/ppc/keywest.c')
-rw-r--r-- | kernel/sound/ppc/keywest.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/kernel/sound/ppc/keywest.c b/kernel/sound/ppc/keywest.c new file mode 100644 index 000000000..0d1c27e91 --- /dev/null +++ b/kernel/sound/ppc/keywest.c @@ -0,0 +1,147 @@ +/* + * common keywest i2c layer + * + * Copyright (c) by Takashi Iwai <tiwai@suse.de> + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#include <linux/init.h> +#include <linux/i2c.h> +#include <linux/delay.h> +#include <sound/core.h> +#include "pmac.h" + +/* + * we have to keep a static variable here since i2c attach_adapter + * callback cannot pass a private data. + */ +static struct pmac_keywest *keywest_ctx; + + +static int keywest_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + i2c_set_clientdata(client, keywest_ctx); + return 0; +} + +/* + * This is kind of a hack, best would be to turn powermac to fixed i2c + * bus numbers and declare the sound device as part of platform + * initialization + */ +static int keywest_attach_adapter(struct i2c_adapter *adapter) +{ + struct i2c_board_info info; + + if (! keywest_ctx) + return -EINVAL; + + if (strncmp(adapter->name, "mac-io", 6)) + return 0; /* ignored */ + + memset(&info, 0, sizeof(struct i2c_board_info)); + strlcpy(info.type, "keywest", I2C_NAME_SIZE); + info.addr = keywest_ctx->addr; + keywest_ctx->client = i2c_new_device(adapter, &info); + if (!keywest_ctx->client) + return -ENODEV; + /* + * We know the driver is already loaded, so the device should be + * already bound. If not it means binding failed, and then there + * is no point in keeping the device instantiated. + */ + if (!keywest_ctx->client->dev.driver) { + i2c_unregister_device(keywest_ctx->client); + keywest_ctx->client = NULL; + return -ENODEV; + } + + /* + * Let i2c-core delete that device on driver removal. + * This is safe because i2c-core holds the core_lock mutex for us. + */ + list_add_tail(&keywest_ctx->client->detected, + &to_i2c_driver(keywest_ctx->client->dev.driver)->clients); + return 0; +} + +static int keywest_remove(struct i2c_client *client) +{ + if (! keywest_ctx) + return 0; + if (client == keywest_ctx->client) + keywest_ctx->client = NULL; + + return 0; +} + + +static const struct i2c_device_id keywest_i2c_id[] = { + { "keywest", 0 }, + { } +}; + +static struct i2c_driver keywest_driver = { + .driver = { + .name = "PMac Keywest Audio", + }, + .attach_adapter = keywest_attach_adapter, + .probe = keywest_probe, + .remove = keywest_remove, + .id_table = keywest_i2c_id, +}; + +/* exported */ +void snd_pmac_keywest_cleanup(struct pmac_keywest *i2c) +{ + if (keywest_ctx && keywest_ctx == i2c) { + i2c_del_driver(&keywest_driver); + keywest_ctx = NULL; + } +} + +int snd_pmac_tumbler_post_init(void) +{ + int err; + + if (!keywest_ctx || !keywest_ctx->client) + return -ENXIO; + + if ((err = keywest_ctx->init_client(keywest_ctx)) < 0) { + snd_printk(KERN_ERR "tumbler: %i :cannot initialize the MCS\n", err); + return err; + } + return 0; +} + +/* exported */ +int snd_pmac_keywest_init(struct pmac_keywest *i2c) +{ + int err; + + if (keywest_ctx) + return -EBUSY; + + keywest_ctx = i2c; + + if ((err = i2c_add_driver(&keywest_driver))) { + snd_printk(KERN_ERR "cannot register keywest i2c driver\n"); + return err; + } + return 0; +} |