release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-omap2/i2c.c

   1 /*
   2  * Helper module for board specific I2C bus registration
   3  *
   4  * Copyright (C) 2009 Nokia Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <plat/cpu.h>
  23 #include <plat/i2c.h>
  24
  25 #include "mux.h"
  26
  27 void __init omap2_i2c_mux_pins(int bus_id)
  28 {
  29         char mux_name[sizeof("i2c2_scl.i2c2_scl")];
  30
  31         /* First I2C bus is not muxable */
  32         if (bus_id == 1)
  33                 return;
  34
  35         sprintf(mux_name, "i2c%i_scl.i2c%i_scl", bus_id, bus_id);
  36         omap_mux_init_signal(mux_name, OMAP_PIN_INPUT);
  37         sprintf(mux_name, "i2c%i_sda.i2c%i_sda", bus_id, bus_id);
  38         omap_mux_init_signal(mux_name, OMAP_PIN_INPUT);
  39 }