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| author | Wolfgang Denk <wd@denx.de> | 2011-11-08 00:34:07 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2011-11-08 00:34:07 +0100 |
| commit | 36a9a15b7ab251b65a55a87a13d66b7d968e1d77 (patch) | |
| tree | a3499c616539fcce9e3738b5cc193efe56e9ba26 /drivers | |
| parent | 7346e385bc2ae30fea75ef00bd56062fefeab2fa (diff) | |
| parent | c9a8b25ef9de9368cbe5be80d59c29af8ad40113 (diff) | |
| download | u-boot-imx-36a9a15b7ab251b65a55a87a13d66b7d968e1d77.zip u-boot-imx-36a9a15b7ab251b65a55a87a13d66b7d968e1d77.tar.gz u-boot-imx-36a9a15b7ab251b65a55a87a13d66b7d968e1d77.tar.bz2 | |
Merge branch 'master' of git://git.denx.de/u-boot-i2c
* 'master' of git://git.denx.de/u-boot-i2c:
Powerpc/i2c: Use the same initialize codes
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/i2c/fsl_i2c.c | 47 |
1 files changed, 25 insertions, 22 deletions
diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c index cb13dee..258be0a 100644 --- a/drivers/i2c/fsl_i2c.c +++ b/drivers/i2c/fsl_i2c.c @@ -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 |