[U-Boot] [PATCH 7/8 V2] I2C: Add support for Multi channel

[Joonyoung Shim]

Hi,

2012/6/7 Rajeshwari Shinde <rajeshwari.s at samsung.com>:
> This adds multiple i2c channel support for I2C.
>
> Signed-off-by: Alim Akhtar <alim.akhtar at samsung.com>
> Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
> Acked-by: Simon Glass <sjg at chromium.org>
> ---
>  drivers/i2c/s3c24x0_i2c.c |   27 +++++++++++++++++++++++++++
>  1 files changed, 27 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/i2c/s3c24x0_i2c.c b/drivers/i2c/s3c24x0_i2c.c
> index a71f147..7521cb8 100644
> --- a/drivers/i2c/s3c24x0_i2c.c
> +++ b/drivers/i2c/s3c24x0_i2c.c
> @@ -191,6 +191,33 @@ static void i2c_bus_init(struct s3c24x0_i2c *i2c, unsigned int bus)
>        i2c_ch_init(i2c, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
>  }
>
> +/*
> + * MULTI BUS I2C support
> + */
> +
> +#ifdef CONFIG_I2C_MULTI_BUS
> +int i2c_set_bus_num(unsigned int bus)
> +{
> +       struct s3c24x0_i2c *i2c;
> +
> +       if ((bus < 0) || (bus >= CONFIG_MAX_I2C_NUM)) {
> +               debug("Bad bus: %d\n", bus);
> +               return -1;
> +       }
> +
> +       g_current_bus = bus;
> +       i2c = get_base_i2c(g_current_bus);
> +       i2c_bus_init(i2c, g_current_bus);

This causes duplicated pin configuration whenever calls i2c_set_bus_num().

> +
> +       return 0;
> +}
> +
> +unsigned int i2c_get_bus_num(void)
> +{
> +       return g_current_bus;
> +}
> +#endif

Does only EXYNOS5 support CONFIG_I2C_MULTI_BUS?

> +
>  #ifdef CONFIG_EXYNOS5
>  void i2c_init(int speed, int slaveadd)
>  {
> --
> 1.7.4.4
>
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Thanks.

-- 
- Joonyoung Shim