u-boot/board/samsung/common/multi_i2c.c
Łukasz Majewski 7ca8f73a0a i2c:soft:multi: Support for multiple soft I2C buses at Samsung boards
Support for multiple soft I2C buses.

Multibus I2C support is achieved by defining get_multi_{sda|scl}_pin
functions to switch between multiple "soft" I2C buses.

Common definition of I2C_X I2C buses is provided at <i2c.h>.

TEST HW:
     Samsung's Exynos4210 evt.0.1 - Trats development board

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Acked-by: Heiko Schocher <hs@denx.de>
2012-09-17 09:39:50 +02:00

65 lines
1.6 KiB
C

/*
* Copyright (C) 2012 Samsung Electronics
* Lukasz Majewski <l.majewski@samsung.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <i2c.h>
/* Handle multiple I2C buses instances */
int get_multi_scl_pin(void)
{
unsigned int bus = I2C_GET_BUS();
switch (bus) {
case I2C_0: /* I2C_0 definition - compatibility layer */
case I2C_5:
return CONFIG_SOFT_I2C_I2C5_SCL;
case I2C_9:
return CONFIG_SOFT_I2C_I2C9_SCL;
default:
printf("I2C_%d not supported!\n", bus);
};
return 0;
}
int get_multi_sda_pin(void)
{
unsigned int bus = I2C_GET_BUS();
switch (bus) {
case I2C_0: /* I2C_0 definition - compatibility layer */
case I2C_5:
return CONFIG_SOFT_I2C_I2C5_SDA;
case I2C_9:
return CONFIG_SOFT_I2C_I2C9_SDA;
default:
printf("I2C_%d not supported!\n", bus);
};
return 0;
}
int multi_i2c_init(void)
{
return 0;
}