mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-19 19:28:36 +00:00
7ca8f73a0a
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>
65 lines
1.6 KiB
C
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;
|
|
}
|