From: Simon Horman <horms@verge.net.au>
To: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
Magnus Damm <magnus.damm@gmail.com>,
linux-renesas-soc@vger.kernel.org
Subject: Re: [PATCH/RFC] ARM: shmobile: rcar-gen2: Correct arch timer frequency on R-Car V2H
Date: Thu, 16 Jun 2016 14:19:18 +0900 [thread overview]
Message-ID: <20160616051918.GD10590@verge.net.au> (raw)
In-Reply-To: <1465813872-11937-1-git-send-email-geert+renesas@glider.be>
On Mon, Jun 13, 2016 at 12:31:12PM +0200, Geert Uytterhoeven wrote:
> According to the datasheet, the frequency of the ARM architecture timer
> on R-Car V2H depends on the frequency of the ZS clock, just like on
> R-Car E2.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
> Against renesas-devel-20160613-v4.7-rc3 with "ARM: shmobile: rcar-gen2:
> Obtain extal frequency from DT" applied.
>
> Untested due to lack of hardware.
Sergei, could you test this?
> ---
> arch/arm/mach-shmobile/setup-rcar-gen2.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/mach-shmobile/setup-rcar-gen2.c b/arch/arm/mach-shmobile/setup-rcar-gen2.c
> index ea092d5dd475042d..afb9fdcd3d9084e2 100644
> --- a/arch/arm/mach-shmobile/setup-rcar-gen2.c
> +++ b/arch/arm/mach-shmobile/setup-rcar-gen2.c
> @@ -76,7 +76,8 @@ void __init rcar_gen2_timer_init(void)
> void __iomem *base;
> u32 freq;
>
> - if (of_machine_is_compatible("renesas,r8a7794")) {
> + if (of_machine_is_compatible("renesas,r8a7792") ||
> + of_machine_is_compatible("renesas,r8a7794")) {
> freq = 260000000 / 8; /* ZS / 8 */
> /* CNTVOFF has to be initialized either from non-secure
> * Hypervisor mode or secure Monitor mode with SCR.NS==1.
> --
> 1.9.1
>
next prev parent reply other threads:[~2016-06-16 5:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-13 10:31 [PATCH/RFC] ARM: shmobile: rcar-gen2: Correct arch timer frequency on R-Car V2H Geert Uytterhoeven
2016-06-16 5:19 ` Simon Horman [this message]
2016-06-17 20:24 ` Sergei Shtylyov
2016-06-20 8:40 ` Simon Horman
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