Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / drivers / mfd / wl1273-core.c

diff --git a/drivers/mfd/wl1273-core.c b/drivers/mfd/wl1273-core.c
new file mode 100644 (file)
index 0000000..d2ecc24
--- /dev/null
+++ b/drivers/mfd/wl1273-core.c
@@ -0,0 +1,148 @@
+/*
+ * MFD driver for wl1273 FM radio and audio codec submodules.
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ * Author: Matti Aaltonen <matti.j.aaltonen@nokia.com>
+ *
+ * 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 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/mfd/wl1273-core.h>
+#include <linux/slab.h>
+
+#define DRIVER_DESC "WL1273 FM Radio Core"
+
+static struct i2c_device_id wl1273_driver_id_table[] = {
+       { WL1273_FM_DRIVER_NAME, 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table);
+
+static int wl1273_core_remove(struct i2c_client *client)
+{
+       struct wl1273_core *core = i2c_get_clientdata(client);
+
+       dev_dbg(&client->dev, "%s\n", __func__);
+
+       mfd_remove_devices(&client->dev);
+       i2c_set_clientdata(client, NULL);
+       kfree(core);
+
+       return 0;
+}
+
+static int __devinit wl1273_core_probe(struct i2c_client *client,
+                                      const struct i2c_device_id *id)
+{
+       struct wl1273_fm_platform_data *pdata = client->dev.platform_data;
+       struct wl1273_core *core;
+       struct mfd_cell *cell;
+       int children = 0;
+       int r = 0;
+
+       dev_dbg(&client->dev, "%s\n", __func__);
+
+       if (!pdata) {
+               dev_err(&client->dev, "No platform data.\n");
+               return -EINVAL;
+       }
+
+       if (!(pdata->children & WL1273_RADIO_CHILD)) {
+               dev_err(&client->dev, "Cannot function without radio child.\n");
+               return -EINVAL;
+       }
+
+       core = kzalloc(sizeof(*core), GFP_KERNEL);
+       if (!core)
+               return -ENOMEM;
+
+       core->pdata = pdata;
+       core->client = client;
+       mutex_init(&core->lock);
+
+       i2c_set_clientdata(client, core);
+
+       dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__);
+
+       cell = &core->cells[children];
+       cell->name = "wl1273_fm_radio";
+       cell->platform_data = &core;
+       cell->data_size = sizeof(core);
+       children++;
+
+       if (pdata->children & WL1273_CODEC_CHILD) {
+               cell = &core->cells[children];
+
+               dev_dbg(&client->dev, "%s: Have codec.\n", __func__);
+               cell->name = "wl1273-codec";
+               cell->platform_data = &core;
+               cell->data_size = sizeof(core);
+               children++;
+       }
+
+       dev_dbg(&client->dev, "%s: number of children: %d.\n",
+               __func__, children);
+
+       r = mfd_add_devices(&client->dev, -1, core->cells,
+                           children, NULL, 0);
+       if (r)
+               goto err;
+
+       return 0;
+
+err:
+       i2c_set_clientdata(client, NULL);
+       pdata->free_resources();
+       kfree(core);
+
+       dev_dbg(&client->dev, "%s\n", __func__);
+
+       return r;
+}
+
+static struct i2c_driver wl1273_core_driver = {
+       .driver = {
+               .name = WL1273_FM_DRIVER_NAME,
+       },
+       .probe = wl1273_core_probe,
+       .id_table = wl1273_driver_id_table,
+       .remove = __devexit_p(wl1273_core_remove),
+};
+
+static int __init wl1273_core_init(void)
+{
+       int r;
+
+       r = i2c_add_driver(&wl1273_core_driver);
+       if (r) {
+               pr_err(WL1273_FM_DRIVER_NAME
+                      ": driver registration failed\n");
+               return r;
+       }
+
+       return r;
+}
+
+static void __exit wl1273_core_exit(void)
+{
+       i2c_del_driver(&wl1273_core_driver);
+}
+late_initcall(wl1273_core_init);
+module_exit(wl1273_core_exit);
+
+MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");