mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-21 10:05:00 +08:00
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
|
/*
|
||
|
|
* Helper module for board specific I2C bus registration
|
||
|
|
*
|
||
|
|
* Copyright (C) 2009 Nokia Corporation.
|
||
|
|
*
|
||
|
|
* 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 <plat/cpu.h>
|
||
|
|
#include <plat/i2c.h>
|
||
|
|
#include <plat/mux.h>
|
||
|
|
|
||
|
|
#include "mux.h"
|
||
|
|
|
||
|
|
int __init omap_register_i2c_bus(int bus_id, u32 clkrate,
|
||
|
|
struct i2c_board_info const *info,
|
||
|
|
unsigned len)
|
||
|
|
{
|
||
|
|
if (cpu_is_omap24xx()) {
|
||
|
|
const int omap24xx_pins[][2] = {
|
||
|
|
{ M19_24XX_I2C1_SCL, L15_24XX_I2C1_SDA },
|
||
|
|
{ J15_24XX_I2C2_SCL, H19_24XX_I2C2_SDA },
|
||
|
|
};
|
||
|
|
int scl, sda;
|
||
|
|
|
||
|
|
scl = omap24xx_pins[bus_id - 1][0];
|
||
|
|
sda = omap24xx_pins[bus_id - 1][1];
|
||
|
|
omap_cfg_reg(sda);
|
||
|
|
omap_cfg_reg(scl);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* First I2C bus is not muxable */
|
||
|
|
if (cpu_is_omap34xx() && bus_id > 1) {
|
||
|
|
char mux_name[sizeof("i2c2_scl.i2c2_scl")];
|
||
|
|
|
||
|
|
sprintf(mux_name, "i2c%i_scl.i2c%i_scl", bus_id, bus_id);
|
||
|
|
omap_mux_init_signal(mux_name, OMAP_PIN_INPUT);
|
||
|
|
sprintf(mux_name, "i2c%i_sda.i2c%i_sda", bus_id, bus_id);
|
||
|
|
omap_mux_init_signal(mux_name, OMAP_PIN_INPUT);
|
||
|
|
}
|
||
|
|
|
||
|
|
return omap_plat_register_i2c_bus(bus_id, clkrate, info, len);
|
||
|
|
}
|