[U-Boot] [PATCH v4 1/2] i2c:soft:multi: Support for multiple soft I2C buses at Samsung boards

Heiko Schocher
2012-09-06T03:49:14Z

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 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>
>
> ---
> 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
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