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I2C: Add support for Multi channel

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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>
This commit is contained in:
Rajeshwari Shinde 2012-07-23 21:23:54 +00:00 committed by Heiko Schocher
parent ab7e52bb24
commit 178239de19
1 changed files with 27 additions and 0 deletions
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27
drivers/i2c/s3c24x0_i2c.c
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@ -158,6 +158,33 @@ static void i2c_ch_init(struct s3c24x0_i2c *i2c, int speed, int slaveadd)
writel(I2C_MODE_MT | I2C_TXRX_ENA, &i2c->iicstat); writel(I2C_MODE_MT | I2C_TXRX_ENA, &i2c->iicstat);
} }
/*
* 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();
i2c_ch_init(i2c, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
return 0;
}
unsigned int i2c_get_bus_num(void)
{
return g_current_bus;
}
#endif
void i2c_init(int speed, int slaveadd) void i2c_init(int speed, int slaveadd)
{ {
struct s3c24x0_i2c *i2c; struct s3c24x0_i2c *i2c;