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author | Ćukasz Majewski <l.majewski@samsung.com> | 2012-09-04 23:15:20 (GMT) |
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committer | Heiko Schocher <hs@denx.de> | 2012-09-17 07:39:50 (GMT) |
commit | 7ca8f73a0ad9176e6e45190a3490bbeb3d80e018 (patch) | |
tree | 70dc1bcf7f4b35aa0a92483f5a0611d549a0118a /board | |
parent | a532278074f1d1fa7d46b144e0d4b824ae7d3335 (diff) | |
download | u-boot-7ca8f73a0ad9176e6e45190a3490bbeb3d80e018.tar.xz |
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>
Diffstat (limited to 'board')
-rw-r--r-- | board/samsung/common/Makefile | 43 | ||||
-rw-r--r-- | board/samsung/common/multi_i2c.c | 65 |
2 files changed, 108 insertions, 0 deletions
diff --git a/board/samsung/common/Makefile b/board/samsung/common/Makefile new file mode 100644 index 0000000..0bcd594 --- /dev/null +++ b/board/samsung/common/Makefile @@ -0,0 +1,43 @@ +# +# 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 $(TOPDIR)/config.mk + +LIB = $(obj)libsamsung.o + +COBJS-$(CONFIG_SOFT_I2C_MULTI_BUS) += multi_i2c.o + +SRCS := $(COBJS-y:.o=.c) +OBJS := $(addprefix $(obj),$(COBJS-y)) + +$(LIB): $(obj).depend $(OBJS) + $(call cmd_link_o_target, $(OBJS)) + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### diff --git a/board/samsung/common/multi_i2c.c b/board/samsung/common/multi_i2c.c new file mode 100644 index 0000000..d6c3d37 --- /dev/null +++ b/board/samsung/common/multi_i2c.c @@ -0,0 +1,65 @@ +/* + * 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; +} |