diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/i2c/i2c-boardinfo.c')
-rw-r--r-- | ANDROID_3.4.5/drivers/i2c/i2c-boardinfo.c | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/i2c-boardinfo.c b/ANDROID_3.4.5/drivers/i2c/i2c-boardinfo.c deleted file mode 100644 index f24cc64e..00000000 --- a/ANDROID_3.4.5/drivers/i2c/i2c-boardinfo.c +++ /dev/null @@ -1,94 +0,0 @@ -/* - * i2c-boardinfo.c - collect pre-declarations of I2C devices - * - * 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., 51 Franklin Street, Fifth Floor, Boston, - * MA 02110-1301 USA. - */ - -#include <linux/kernel.h> -#include <linux/i2c.h> -#include <linux/slab.h> -#include <linux/export.h> -#include <linux/rwsem.h> - -#include "i2c-core.h" - - -/* These symbols are exported ONLY FOR the i2c core. - * No other users will be supported. - */ -DECLARE_RWSEM(__i2c_board_lock); -EXPORT_SYMBOL_GPL(__i2c_board_lock); - -LIST_HEAD(__i2c_board_list); -EXPORT_SYMBOL_GPL(__i2c_board_list); - -int __i2c_first_dynamic_bus_num; -EXPORT_SYMBOL_GPL(__i2c_first_dynamic_bus_num); - - -/** - * i2c_register_board_info - statically declare I2C devices - * @busnum: identifies the bus to which these devices belong - * @info: vector of i2c device descriptors - * @len: how many descriptors in the vector; may be zero to reserve - * the specified bus number. - * - * Systems using the Linux I2C driver stack can declare tables of board info - * while they initialize. This should be done in board-specific init code - * near arch_initcall() time, or equivalent, before any I2C adapter driver is - * registered. For example, mainboard init code could define several devices, - * as could the init code for each daughtercard in a board stack. - * - * The I2C devices will be created later, after the adapter for the relevant - * bus has been registered. After that moment, standard driver model tools - * are used to bind "new style" I2C drivers to the devices. The bus number - * for any device declared using this routine is not available for dynamic - * allocation. - * - * The board info passed can safely be __initdata, but be careful of embedded - * pointers (for platform_data, functions, etc) since that won't be copied. - */ -int __init -i2c_register_board_info(int busnum, - struct i2c_board_info const *info, unsigned len) -{ - int status; - - down_write(&__i2c_board_lock); - - /* dynamic bus numbers will be assigned after the last static one */ - if (busnum >= __i2c_first_dynamic_bus_num) - __i2c_first_dynamic_bus_num = busnum + 1; - - for (status = 0; len; len--, info++) { - struct i2c_devinfo *devinfo; - - devinfo = kzalloc(sizeof(*devinfo), GFP_KERNEL); - if (!devinfo) { - pr_debug("i2c-core: can't register boardinfo!\n"); - status = -ENOMEM; - break; - } - - devinfo->busnum = busnum; - devinfo->board_info = *info; - list_add_tail(&devinfo->list, &__i2c_board_list); - } - - up_write(&__i2c_board_lock); - - return status; -} |