[U-Boot-Users] [PATCH] fsl-i2c: fix writes to data segment before relocation

[Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>]

On 14:26 Mon 21 Jul     , Timur Tabi wrote:
> 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>
> ---
> 
> Wolfgang, please apply this directly to fix the I2C bug we've been talking about.
> 
>  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)
Maybe a macro will more clear like
	if(is_relacated())
		i2c_bus_speed[0] = temp;

Best Regards,
J.