Re: [PATCH] clk: sunxi-ng: sun6i-a31: Force AHB1 clock to use PLL6 as parent

From: Jean-Francois Moine
Date: Tue Oct 18 2016 - 03:51:01 EST

On Tue, 18 Oct 2016 13:42:09 +0800
Chen-Yu Tsai <wens@xxxxxxxx> 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...

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