1 /* 2 * MFD driver for wl1273 FM radio and audio codec submodules. 3 * 4 * Copyright (C) 2010 Nokia Corporation 5 * Author: Matti Aaltonen <matti.j.aaltonen@nokia.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 19 * 02110-1301 USA 20 * 21 */ 22 23 #include <linux/mfd/wl1273-core.h> 24 #include <linux/slab.h> 25 26 #define DRIVER_DESC "WL1273 FM Radio Core" 27 28 static struct i2c_device_id wl1273_driver_id_table[] = { 29 { WL1273_FM_DRIVER_NAME, 0 }, 30 { } 31 }; 32 MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table); 33 34 static int wl1273_core_remove(struct i2c_client *client) 35 { 36 struct wl1273_core *core = i2c_get_clientdata(client); 37 38 dev_dbg(&client->dev, "%s\n", __func__); 39 40 mfd_remove_devices(&client->dev); 41 kfree(core); 42 43 return 0; 44 } 45 46 static int __devinit wl1273_core_probe(struct i2c_client *client, 47 const struct i2c_device_id *id) 48 { 49 struct wl1273_fm_platform_data *pdata = client->dev.platform_data; 50 struct wl1273_core *core; 51 struct mfd_cell *cell; 52 int children = 0; 53 int r = 0; 54 55 dev_dbg(&client->dev, "%s\n", __func__); 56 57 if (!pdata) { 58 dev_err(&client->dev, "No platform data.\n"); 59 return -EINVAL; 60 } 61 62 if (!(pdata->children & WL1273_RADIO_CHILD)) { 63 dev_err(&client->dev, "Cannot function without radio child.\n"); 64 return -EINVAL; 65 } 66 67 core = kzalloc(sizeof(*core), GFP_KERNEL); 68 if (!core) 69 return -ENOMEM; 70 71 core->pdata = pdata; 72 core->client = client; 73 mutex_init(&core->lock); 74 75 i2c_set_clientdata(client, core); 76 77 dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__); 78 79 cell = &core->cells[children]; 80 cell->name = "wl1273_fm_radio"; 81 cell->platform_data = &core; 82 cell->data_size = sizeof(core); 83 children++; 84 85 if (pdata->children & WL1273_CODEC_CHILD) { 86 cell = &core->cells[children]; 87 88 dev_dbg(&client->dev, "%s: Have codec.\n", __func__); 89 cell->name = "wl1273-codec"; 90 cell->platform_data = &core; 91 cell->data_size = sizeof(core); 92 children++; 93 } 94 95 dev_dbg(&client->dev, "%s: number of children: %d.\n", 96 __func__, children); 97 98 r = mfd_add_devices(&client->dev, -1, core->cells, 99 children, NULL, 0); 100 if (r) 101 goto err; 102 103 return 0; 104 105 err: 106 pdata->free_resources(); 107 kfree(core); 108 109 dev_dbg(&client->dev, "%s\n", __func__); 110 111 return r; 112 } 113 114 static struct i2c_driver wl1273_core_driver = { 115 .driver = { 116 .name = WL1273_FM_DRIVER_NAME, 117 }, 118 .probe = wl1273_core_probe, 119 .id_table = wl1273_driver_id_table, 120 .remove = __devexit_p(wl1273_core_remove), 121 }; 122 123 static int __init wl1273_core_init(void) 124 { 125 int r; 126 127 r = i2c_add_driver(&wl1273_core_driver); 128 if (r) { 129 pr_err(WL1273_FM_DRIVER_NAME 130 ": driver registration failed\n"); 131 return r; 132 } 133 134 return r; 135 } 136 137 static void __exit wl1273_core_exit(void) 138 { 139 i2c_del_driver(&wl1273_core_driver); 140 } 141 late_initcall(wl1273_core_init); 142 module_exit(wl1273_core_exit); 143 144 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>"); 145 MODULE_DESCRIPTION(DRIVER_DESC); 146 MODULE_LICENSE("GPL"); 147