From: Peter Chen
...
> +#ifdef
> +static inline void imx28_ci_writel(u32 val, volatile void __iomem *addr)
> +{
> + __asm__ ("swp %0, %0, [%1]" : : "r"(val), "r"(addr));
> +}
> +#else
> +static inline void imx28_ci_writel(u32 val, volatile void __iomem *addr)
> +{
> +}
> +#endif
> +
> +static inline void __hw_write(struct ci_hdrc *ci, u32 val,
> + void __iomem *addr)
> +{
> + if (ci->imx28_write_fix)
> + imx28_ci_writel(val, addr);
> + else
> + iowrite32(val, addr);
> +}
> +
This code ought to be defensive against 'imx28_write_fix' being
set when the kernel isn't compiled with CONFIG_SOC_IMX28.
This can easily be done by changing the #else block to do an iowrite().
It is worth looking to see if the compiler manages to optimise away
the 'if' test in this case. It might do better if a #define is used
instead of the inline function.
David
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