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| author | Timur Tabi <timur@freescale.com> | 2008-07-21 14:26:23 -0500 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2008-07-30 00:10:13 +0200 |
| commit | e4dafff86f289b5677143a3e41da7b45c6d27fc7 (patch) | |
| tree | 1a2d1c412f50be0566768a7d5ec745cbe4d1302f /drivers/i2c/fsl_i2c.c | |
| parent | 1953d128fd07f07d1c3810a28c0863ea64dae1b6 (diff) | |
| download | u-boot-imx-e4dafff86f289b5677143a3e41da7b45c6d27fc7.zip u-boot-imx-e4dafff86f289b5677143a3e41da7b45c6d27fc7.tar.gz u-boot-imx-e4dafff86f289b5677143a3e41da7b45c6d27fc7.tar.bz2 | |
fsl-i2c: fix writes to data segment before relocation
Prevent i2c_init() in fsl_i2c.c from writing to the data segment before
relocation. Commit d8c82db4 added the ability for i2c_init() to program the
I2C bus speed and save the value in i2c_bus_speed[], which is a global
variable. It is an error to write to the data segment before relocation,
which is what i2c_init() does when it stores the bus speed in i2c_bus_speed[].
Signed-off-by: Timur Tabi <timur@freescale.com>
Diffstat (limited to 'drivers/i2c/fsl_i2c.c')
| -rw-r--r-- | drivers/i2c/fsl_i2c.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c index 9f2c1ec..9d5df8a 100644 --- a/drivers/i2c/fsl_i2c.c +++ b/drivers/i2c/fsl_i2c.c @@ -143,12 +143,15 @@ void i2c_init(int speed, int slaveadd) { struct fsl_i2c *dev; + unsigned int temp; dev = (struct fsl_i2c *) (CFG_IMMR + CFG_I2C_OFFSET); writeb(0, &dev->cr); /* stop I2C controller */ udelay(5); /* let it shutdown in peace */ - i2c_bus_speed[0] = set_i2c_bus_speed(dev, gd->i2c1_clk, speed); + 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 */ @@ -158,7 +161,9 @@ i2c_init(int speed, int slaveadd) writeb(0, &dev->cr); /* stop I2C controller */ udelay(5); /* let it shutdown in peace */ - i2c_bus_speed[1] = set_i2c_bus_speed(dev, gd->i2c2_clk, speed); + 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 */ |