2012/6/19 Rajeshwari Birje rajeshwari.birje@gmail.com:
Hi Joonyoung Shim,
Thank you for comments.
On Fri, Jun 15, 2012 at 12:45 PM, Joonyoung Shim dofmind@gmail.com wrote:
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().
-- Initally we are initialising only for bus 0, When this function gets called with bus id other than 0 we need to initialise that bus.
The problem is i2c_set_bus_num() can be called many times. If did i2c_bus_init() already, just set g_current_bus.