From: moinejf@free.fr (Jean-Francois Moine)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] clk: sunxi-ng: sun6i-a31: Force AHB1 clock to use PLL6 as parent
Date: Tue, 18 Oct 2016 09:50:44 +0200 [thread overview]
Message-ID: <20161018095044.d1664c4935ad13007453fb35@free.fr> (raw)
In-Reply-To: <20161018054209.24546-1-wens@csie.org>
On Tue, 18 Oct 2016 13:42:09 +0800
Chen-Yu Tsai <wens@csie.org> wrote:
> On the A31, the DMA engine only works if AHB1 is clocked from PLL6.
> In addition, the hstimer is clocked from AHB1, and if AHB1 is clocked
> from the CPU clock, and cpufreq is working, we get an unstable timer.
>
> Force the AHB1 clock to use PLL6 as its parent. Previously this was done
> in the device tree with the assigned-clocks and assigned-clocks-parent
> bindings. However with this new monolithic driver, the system critical
> clocks aren't exported through the device tree. The alternative is to
> force this setting in the driver before the clocks are registered.
It should be simpler to export the constant (CLK_AHB1) instead of
adding code...
--
Ken ar c'henta? | ** Breizh ha Linux atav! **
Jef | http://moinejf.free.fr/
next prev parent reply other threads:[~2016-10-18 7:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-18 5:42 [PATCH] clk: sunxi-ng: sun6i-a31: Force AHB1 clock to use PLL6 as parent Chen-Yu Tsai
2016-10-18 7:50 ` Jean-Francois Moine [this message]
2016-10-18 7:57 ` Chen-Yu Tsai
2016-10-19 9:56 ` Maxime Ripard
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