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From: Alexey.Brodkin@synopsys.com (Alexey Brodkin)
To: linux-snps-arc@lists.infradead.org
Subject: [PATCH 7/9] ARC: use fixed frequencies in arc_set_early_base_baud()
Date: Tue, 2 Feb 2016 12:53:26 +0000	[thread overview]
Message-ID: <1454417606.25997.7.camel@synopsys.com> (raw)
In-Reply-To: <1454410739-24444-8-git-send-email-vgupta@synopsys.com>

Adding Christian for Abilis TB10x clocks review.

On Tue, 2016-02-02@16:28 +0530, Vineet Gupta wrote:
> From: Alexey Brodkin <abrodkin at synopsys.com>
> 
> UARTs usually have fixed clock so we're switching to use of
> constant values instead of something derived from core clock
> frequency.
> 
> Among other things this will allow us to get rid of
> arc_{get|set}_core_freq() and switch to generic clock
> framework later on.
> 
> Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
> Signed-off-by: Vineet Gupta <vgupta at synopsys.com>
> ---
>  arch/arc/kernel/devtree.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arc/kernel/devtree.c b/arch/arc/kernel/devtree.c
> index 7e844fd8213f..e155126c79b1 100644
> --- a/arch/arc/kernel/devtree.c
> +++ b/arch/arc/kernel/devtree.c
> @@ -28,14 +28,12 @@ unsigned int __init arc_early_base_baud(void)
>  
>  static void __init arc_set_early_base_baud(unsigned long dt_root)
>  {
> -	unsigned int core_clk = arc_get_core_freq();
> -
>  	if (of_flat_dt_is_compatible(dt_root, "abilis,arc-tb10x"))
> -		arc_base_baud = core_clk/3;
> +		arc_base_baud = 166666667;	/* Fixed 166.7MHz clk (TB10x) */
>  	else if (of_flat_dt_is_compatible(dt_root, "snps,arc-sdp"))
>  		arc_base_baud = 33333333;	/* Fixed 33MHz clk (AXS10x) */
>  	else
> -		arc_base_baud = core_clk;
> +		arc_base_baud = 50000000;	/* Fixed default 50MHz */
>  }
>  #else
>  #define arc_set_early_base_baud(dt_root)

-Alexey

  reply	other threads:[~2016-02-02 12:53 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-02 10:58 [PATCH 0/9] ARC clockevent/clocksource modernization Vineet Gupta
2016-02-02 10:58 ` [PATCH 1/9] ARC: [dts] Add clk feeding into timers to DTs Vineet Gupta
2016-02-02 10:58 ` [PATCH 2/9] ARC: [dts] Introduce Timer bindings Vineet Gupta
2016-02-02 12:48   ` Alexey Brodkin
2016-02-02 13:15   ` Alexey Brodkin
2016-02-02 14:29     ` Vineet Gupta
2016-02-02 15:36       ` Alexey Brodkin
2016-02-02 22:57         ` Alexey Brodkin
2016-02-03 13:44           ` Alexey Brodkin
2016-02-03 13:50             ` Alexey Brodkin
2016-02-02 22:03   ` Rob Herring
2016-02-03  8:04     ` Vineet Gupta
2016-02-03 15:39       ` Rob Herring
2016-02-16  8:44         ` Vineet Gupta
2016-02-02 10:58 ` [PATCH 3/9] ARC: clockevent: switch to cpu notifier for clockevent setup Vineet Gupta
2016-02-02 10:58 ` [PATCH 4/9] ARC: clockevent: Prepare for DT based probe Vineet Gupta
2016-02-02 10:58 ` [PATCH 5/9] ARC: clockevent: " Vineet Gupta
2016-02-02 10:58 ` [PATCH 6/9] ARC: clocksource: " Vineet Gupta
2016-02-08 12:10   ` Daniel Lezcano
2016-02-08 12:23     ` Vineet Gupta
2016-02-10 13:38       ` Daniel Lezcano
2016-02-02 10:58 ` [PATCH 7/9] ARC: use fixed frequencies in arc_set_early_base_baud() Vineet Gupta
2016-02-02 12:53   ` Alexey Brodkin [this message]
2016-02-02 13:43     ` christian.ruppert
2016-02-02 14:26       ` Alexey Brodkin
2016-02-02 10:58 ` [PATCH 8/9] ARC: [plat-axs] Don't use arc_{get|set}_core_freq() for manipulating core clk Vineet Gupta
2016-02-02 10:58 ` [PATCH 9/9] ARC: RIP arc_{get|set}_core_freq() clk API Vineet Gupta

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