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I2C: mv_i2c: add multi bus support

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Add the ability to support multiple i2c bus for mv_i2c

Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Lei Wen <leiwen@marvell.com>
This commit is contained in:
Lei Wen 2011-04-13 23:48:39 +05:30 committed by Albert ARIBAUD
parent aa3b168e31
commit adb00bb6a0
1 changed files with 35 additions and 1 deletions
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36
drivers/i2c/mv_i2c.c
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@ -66,7 +66,35 @@ struct mv_i2c {
u32 isar;
};
static struct mv_i2c *base = (struct mv_i2c *)CONFIG_MV_I2C_REG;
static struct mv_i2c *base;
#ifdef CONFIG_I2C_MULTI_BUS
static u32 i2c_regs[CONFIG_MV_I2C_NUM] = CONFIG_MV_I2C_REG;
static unsigned int bus_initialized[CONFIG_MV_I2C_NUM];
static unsigned int current_bus;
int i2c_set_bus_num(unsigned int bus)
{
if ((bus < 0) || (bus >= CONFIG_MV_I2C_NUM)) {
printf("Bad bus: %d\n", bus);
return -1;
}
base = (struct mv_i2c *)i2c_regs[bus];
current_bus = bus;
if (!bus_initialized[current_bus]) {
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
bus_initialized[current_bus] = 1;
}
return 0;
}
unsigned int i2c_get_bus_num(void)
{
return current_bus;
}
#endif
/*
* i2c_reset: - reset the host controller
@ -235,6 +263,12 @@ i2c_transfer_finish:
/* ------------------------------------------------------------------------ */
void i2c_init(int speed, int slaveaddr)
{
#ifdef CONFIG_I2C_MULTI_BUS
base = (struct mv_i2c *)i2c_regs[current_bus];
#else
base = (struct mv_i2c *)CONFIG_MV_I2C_REG;
#endif
#ifdef CONFIG_SYS_I2C_INIT_BOARD
u32 icr;
/*