[7/8] I2C: Add support for Multi channel

Message ID 1337343153-3019-8-git-send-email-rajeshwari.s@samsung.com
State New
Headers show

Commit Message

Rajeshwari Shinde May 18, 2012, 12:12 p.m.
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>
---
 drivers/i2c/s3c24x0_i2c.c |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

Comments

Simon Glass June 1, 2012, 1:18 a.m. | #1
On Fri, May 18, 2012 at 5:12 AM, Rajeshwari Shinde <rajeshwari.s@samsung.com
> wrote:

> 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 61b54a9..39875cd 100644
> --- a/drivers/i2c/s3c24x0_i2c.c
> +++ b/drivers/i2c/s3c24x0_i2c.c
> @@ -189,6 +189,33 @@ 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);
> +
> +       return 0;
> +}
> +
> +unsigned int i2c_get_bus_num(void)
> +{
> +       return g_current_bus;
> +}
> +#endif
> +
>  #ifdef CONFIG_EXYNOS5
>  void i2c_init(int speed, int slaveadd)
>  {
> --
> 1.7.4.4
>
>

Patch

diff --git a/drivers/i2c/s3c24x0_i2c.c b/drivers/i2c/s3c24x0_i2c.c
index 61b54a9..39875cd 100644
--- a/drivers/i2c/s3c24x0_i2c.c
+++ b/drivers/i2c/s3c24x0_i2c.c
@@ -189,6 +189,33 @@  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);
+
+	return 0;
+}
+
+unsigned int i2c_get_bus_num(void)
+{
+	return g_current_bus;
+}
+#endif
+
 #ifdef CONFIG_EXYNOS5
 void i2c_init(int speed, int slaveadd)
 {