Vineet Gupta <Vineet.Gupta1 at synopsys.com> wrote on 08.03.2016 13:26:10:
> 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.
>
> Cc: Christian Ruppert <christian.ruppert at alitech.com>
> Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
> Signed-off-by: Vineet Gupta <vgupta at synopsys.com>
Acked-by: Christian Ruppert <christian.ruppert at alitech.com>
> ---
> Changes v1 -> v2
> - Base baud TB10x needs to be 166.66 not 166.67 [Christian]
>
> v1:
> - http://lists.infradead.org/pipermail/linux-snps-arc/2016-
> February/000453.html
>
> 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..fecbc96df828 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 = 166666666; /* Fixed 166.6MHz 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)
> --
> 2.5.0
>
