From: jy0922.shim@samsung•com (Joonyoung Shim)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH] ARM: exynos: fix UART address selection for DEBUG_LL
Date: Mon, 19 Jan 2015 15:55:47 +0900 [thread overview]
Message-ID: <54BCAA73.5080404@samsung.com> (raw)
In-Reply-To: <1411728234-29705-1-git-send-email-jy0922.shim@samsung.com>
Hi kukjin,
On 09/26/2014 07:43 PM, Joonyoung Shim wrote:
> The exynos5 SoCs using A15+A7 can boot to A15 or A7. If it boots using
> A7, it can't detect right UART physical address only the part number of
> CP15. It's possible to solve as checking Cluster ID additionally.
>
> Signed-off-by: Joonyoung Shim <jy0922.shim@samsung•com>
> ---
> arch/arm/include/debug/exynos.S | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/include/debug/exynos.S b/arch/arm/include/debug/exynos.S
> index b17fdb7..60bf3c2 100644
> --- a/arch/arm/include/debug/exynos.S
> +++ b/arch/arm/include/debug/exynos.S
> @@ -24,7 +24,11 @@
> mrc p15, 0, \tmp, c0, c0, 0
> and \tmp, \tmp, #0xf0
> teq \tmp, #0xf0 @@ A15
> - ldreq \rp, =EXYNOS5_PA_UART
> + beq 100f
> + mrc p15, 0, \tmp, c0, c0, 5
> + and \tmp, \tmp, #0xf00
> + teq \tmp, #0x100 @@ A15 + A7 but boot to A7
> +100: ldreq \rp, =EXYNOS5_PA_UART
> movne \rp, #EXYNOS4_PA_UART @@ EXYNOS4
> ldr \rv, =S3C_VA_UART
> #if CONFIG_DEBUG_S3C_UART != 0
>
Any comments?
Thanks.
next prev parent reply other threads:[~2015-01-19 6:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-26 10:43 [PATCH] ARM: exynos: fix UART address selection for DEBUG_LL Joonyoung Shim
2015-01-19 6:55 ` Joonyoung Shim [this message]
2016-06-22 6:24 ` Krzysztof Kozlowski
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