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Powerpc/i2c: Use the same initialize codes 

Make the I2C2 and I2C1 use the same initialize codes.

Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
This commit is contained in:
Jerry Huang 2011-10-26 15:29:38 +00:00 committed by Heiko Schocher
parent fec79acc86
commit c9a8b25ef9
1 changed files with 25 additions and 22 deletions
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47
drivers/i2c/fsl_i2c.c
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@ -214,11 +214,20 @@ static unsigned int set_i2c_bus_speed(const struct fsl_i2c *dev,
return speed;
}
unsigned int get_i2c_clock(int bus)
{
if (bus)
return gd->i2c2_clk; /* I2C2 clock */
else
return gd->i2c1_clk; /* I2C1 clock */
}
void
i2c_init(int speed, int slaveadd)
{
struct fsl_i2c *dev;
unsigned int temp;
int bus_num, i;
#ifdef CONFIG_SYS_I2C_INIT_BOARD
/* Call board specific i2c bus reset routine before accessing the
@ -227,29 +236,23 @@ i2c_init(int speed, int slaveadd)
*/
i2c_init_board();
#endif
dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
writeb(0, &dev->cr); /* stop I2C controller */
udelay(5); /* let it shutdown in peace */
temp = set_i2c_bus_speed(dev, gd->i2c1_clk, speed);
if (gd->flags & GD_FLG_RELOC)
i2c_bus_speed[0] = temp;
writeb(slaveadd << 1, &dev->adr); /* write slave address */
writeb(0x0, &dev->sr); /* clear status register */
writeb(I2C_CR_MEN, &dev->cr); /* start I2C controller */
#ifdef CONFIG_SYS_I2C2_OFFSET
dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C2_OFFSET);
writeb(0, &dev->cr); /* stop I2C controller */
udelay(5); /* let it shutdown in peace */
temp = set_i2c_bus_speed(dev, gd->i2c2_clk, speed);
if (gd->flags & GD_FLG_RELOC)
i2c_bus_speed[1] = temp;
writeb(slaveadd << 1, &dev->adr); /* write slave address */
writeb(0x0, &dev->sr); /* clear status register */
writeb(I2C_CR_MEN, &dev->cr); /* start I2C controller */
#ifdef CONFIG_SYS_I2C2_OFFSET
bus_num = 2;
#else
bus_num = 1;
#endif
for (i = 0; i < bus_num; i++) {
dev = i2c_dev[i];
writeb(0, &dev->cr); /* stop I2C controller */
udelay(5); /* let it shutdown in peace */
temp = set_i2c_bus_speed(dev, get_i2c_clock(i), speed);
if (gd->flags & GD_FLG_RELOC)
i2c_bus_speed[i] = temp;
writeb(slaveadd << 1, &dev->adr);/* write slave address */
writeb(0x0, &dev->sr); /* clear status register */
writeb(I2C_CR_MEN, &dev->cr); /* start I2C controller */
}
#ifdef CONFIG_SYS_I2C_BOARD_LATE_INIT
/* Call board specific i2c bus reset routine AFTER the bus has been