From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joonyoung Shim <dofmind@gmail.com>
Date: Fri, 15 Jun 2012 16:15:11 +0900
Subject: [U-Boot] [PATCH 7/8 V2] I2C: Add support for Multi channel
In-Reply-To: <1339049394-4816-8-git-send-email-rajeshwari.s@samsung.com>
References: <1339049394-4816-1-git-send-email-rajeshwari.s@samsung.com>
	<1339049394-4816-8-git-send-email-rajeshwari.s@samsung.com>
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Hi,

2012/6/7 Rajeshwari Shinde <rajeshwari.s@samsung.com>:
> This adds multiple i2c channel support for I2C.
>
> Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
> Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
> Acked-by: Simon Glass <sjg@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