[U-Boot] [PATCH] EXYNOS: Detect cpuid based on Exynos product codes

[Minkyu Kang]

Dear Chander Kashyap,

On 14 March 2012 15:42, Chander Kashyap <chander.kashyap at linaro.org> wrote:
> Exynos based SoC's have two different naming conventions.
> One is S5PC_XXXX and other is EXXX_XXXX. This patch adds
> generic code to handle EXXX_XXXX connvention.
>
> Signed-off-by: Chander Kashyap <chander.kashyap at linaro.org>
> ---
>  arch/arm/include/asm/arch-exynos/cpu.h |    5 ++++-
>  1 files changed, 4 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/include/asm/arch-exynos/cpu.h b/arch/arm/include/asm/arch-exynos/cpu.h
> index 89f2c2e..da89ccf 100644
> --- a/arch/arm/include/asm/arch-exynos/cpu.h
> +++ b/arch/arm/include/asm/arch-exynos/cpu.h
> @@ -105,10 +105,13 @@ static inline void s5p_set_cpu_id(void)
>        }
>  }
>
> +#define EXYNOS_ID      ((readl(EXYNOS4_PRO_ID) & (0xF << 24)) >> 24)
>  #define IS_SAMSUNG_TYPE(type, id)                      \
>  static inline int cpu_is_##type(void)                  \
>  {                                                      \
> -       return s5p_cpu_id == id ? 1 : 0;                \
> +       return ((s5p_cpu_id == id)                      \
> +               || (EXYNOS_ID == (#type[sizeof(#type) - 2] - '0'))) \
> +               ? 1 : 0;                                \
>  }
>

Sorry, I can't understand this patch.
What is it for?

Thanks.
Minkyu Kang.
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