[U-Boot] [PATCH v2] arm:board:trats2:FIX: Clear INFORM4 and INFORM5 registers at correct boot

[Minkyu Kang]

On 09/04/14 22:09, Lukasz Majewski wrote:
> During switch to device tree, commit 1ecab0f has removed this code.
> 
> INFORM4 and INFORM5 registers are used by TRATS2 first stage bootloader for
> providing recovery. For normal operation, those two must be cleared out.
> 
> This error emerges when one force reset from u-boot's command line for
> three times.
> 
> Signed-off-by: Lukasz Majewski <l.majewski at samsung.com>
> Cc: Minkyu Kang <mk7.kang at samsung.com>
> 
> ---
> Changes for v2:
> - Remove redundant cast
> ---
>  board/samsung/trats2/trats2.c |   13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/board/samsung/trats2/trats2.c b/board/samsung/trats2/trats2.c
> index 2a6c9f9..f558ef9 100644
> --- a/board/samsung/trats2/trats2.c
> +++ b/board/samsung/trats2/trats2.c
> @@ -150,9 +150,22 @@ static int pmic_init_max77686(void);
>  
>  int exynos_init(void)
>  {
> +	struct exynos4_power *pwr =
> +		(struct exynos4_power *)samsung_get_base_power();
> +
>  	check_hw_revision();
>  	printf("HW Revision:\t0x%04x\n", board_rev);
>  
> +	/*
> +	 * First bootloader on the TRATS2 platform uses
> +	 * INFORM4 and INFORM5 registers for recovery
> +	 *
> +	 * To indicate correct boot chain - those two
> +	 * registers must be cleared out
> +	 */
> +	writel(0, &pwr->inform4);
> +	writel(0, &pwr->inform5);
> +
>  	return 0;
>  }
>  
> 

Acked-by: Minkyu Kang <mk7.kang at samsung.com>

Thanks,
Minkyu Kang.