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https://github.com/brain-hackers/u-boot-brain
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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>
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/*
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* Copyright (C) 2012 Samsung Electronics
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* Lukasz Majewski <l.majewski@samsung.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <i2c.h>
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/* Handle multiple I2C buses instances */
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int get_multi_scl_pin(void)
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{
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unsigned int bus = I2C_GET_BUS();
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switch (bus) {
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case I2C_0: /* I2C_0 definition - compatibility layer */
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case I2C_5:
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return CONFIG_SOFT_I2C_I2C5_SCL;
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case I2C_9:
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return CONFIG_SOFT_I2C_I2C9_SCL;
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default:
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printf("I2C_%d not supported!\n", bus);
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};
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return 0;
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}
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int get_multi_sda_pin(void)
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{
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unsigned int bus = I2C_GET_BUS();
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switch (bus) {
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case I2C_0: /* I2C_0 definition - compatibility layer */
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case I2C_5:
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return CONFIG_SOFT_I2C_I2C5_SDA;
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case I2C_9:
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return CONFIG_SOFT_I2C_I2C9_SDA;
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default:
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printf("I2C_%d not supported!\n", bus);
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};
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return 0;
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}
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int multi_i2c_init(void)
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{
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return 0;
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}
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