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i2c: add CONFIG_I2C_MULTI_BUS for soft_i2c and mpc8260 i2c driver.

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Signed-off-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Heiko Schocher 2008-10-15 09:34:45 +02:00 • committed by Wolfgang Denk
parent 0809ea2f43
commit 799b784aa0
2 changed files with 72 additions and 0 deletions
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36
cpu/mpc8260/i2c.c
View file

@ -36,6 +36,10 @@
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_I2C_MULTI_BUS)
static unsigned int i2c_bus_num __attribute__ ((section ("data"))) = 0;
#endif /* CONFIG_I2C_MULTI_BUS */
/* uSec to wait between polls of the i2c */
#define DELAY_US 100
/* uSec to wait for the CPM to start processing the buffer */
@ -765,4 +769,36 @@ i2c_reg_write(uchar chip, uchar reg, uchar val)
i2c_write(chip, reg, 1, &val, 1);
}
#if defined(CONFIG_I2C_MULTI_BUS)
/*
* Functions for multiple I2C bus handling
*/
unsigned int i2c_get_bus_num(void)
{
return i2c_bus_num;
}
int i2c_set_bus_num(unsigned int bus)
{
if (bus >= CFG_MAX_I2C_BUS)
return -1;
i2c_bus_num = bus;
return 0;
}
/* TODO: add 100/400k switching */
unsigned int i2c_get_bus_speed(void)
{
return CFG_I2C_SPEED;
}
int i2c_set_bus_speed(unsigned int speed)
{
if (speed != CFG_I2C_SPEED)
return -1;
return 0;
}
#endif /* CONFIG_I2C_MULTI_BUS */
#endif /* CONFIG_HARD_I2C */

36
drivers/i2c/soft_i2c.c
View file

@ -68,6 +68,10 @@ DECLARE_GLOBAL_DATA_PTR;
#define PRINTD(fmt,args...)
#endif
#if defined(CONFIG_I2C_MULTI_BUS)
static unsigned int i2c_bus_num __attribute__ ((section ("data"))) = 0;
#endif /* CONFIG_I2C_MULTI_BUS */
/*-----------------------------------------------------------------------
* Local functions
*/
@ -230,6 +234,38 @@ static int write_byte(uchar data)
return(nack); /* not a nack is an ack */
}
#if defined(CONFIG_I2C_MULTI_BUS)
/*
* Functions for multiple I2C bus handling
*/
unsigned int i2c_get_bus_num(void)
{
return i2c_bus_num;
}
int i2c_set_bus_num(unsigned int bus)
{
if (bus >= CFG_MAX_I2C_BUS)
return -1;
i2c_bus_num = bus;
return 0;
}
/* TODO: add 100/400k switching */
unsigned int i2c_get_bus_speed(void)
{
return CFG_I2C_SPEED;
}
int i2c_set_bus_speed(unsigned int speed)
{
if (speed != CFG_I2C_SPEED)
return -1;
return 0;
}
#endif
/*-----------------------------------------------------------------------
* if ack == I2C_ACK, ACK the byte so can continue reading, else