Hello Lukasz,
On 05.09.2012 11:15, Lukasz Majewski wrote:
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 Majewskil.majewski@samsung.com Signed-off-by: Kyungmin Parkkyungmin.park@samsung.com Cc: Heiko Schocherhs@denx.de Cc: Minkyu Kangmk7.kang@samsung.com
Changes for v2:
- Common Samsung code has been put to board/samsung/common/multi_i2c.c file
- I2C_{4|5} have been renamed to I2C_{0|1}
- *soft_i2c_name[] table has been removed
Changes for v3:
- None
Changes for v4:
- Common definitions of available I2C buses are now defined at<i2c.h>
- Compatibility layer (I2C_0) has been added temporarily to not break the Trats I2C communication with PMIC. It will be removed when redesigned PMIC will be posted
board/samsung/common/Makefile | 43 +++++++++++++++++++++++++ board/samsung/common/multi_i2c.c | 65 ++++++++++++++++++++++++++++++++++++++ include/i2c.h | 12 +++++++ 3 files changed, 120 insertions(+), 0 deletions(-) create mode 100644 board/samsung/common/Makefile create mode 100644 board/samsung/common/multi_i2c.c
[...]
+######################################################################### 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 @@
[...]
+/* 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:
Is this correct, that you want to use 2 i2c busses on the same pin?
Beside of that, you get my:
Acked-by: Heiko Schocher hs@denx.de
bye, Heiko