tree a5ed0736b71cbab9ac04148f4ab23f66d5d40be6
parent 64f28430cf152e7e2836df37e51c56e31e3647c2
author Chen-Yu Tsai <wens@csie.org> 1544004710 +0800
committer Maxime Ripard <maxime.ripard@bootlin.com> 1544008097 +0100
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clk: sunxi-ng: a33: Use sigma-delta modulation for audio PLL

The audio blocks require specific clock rates. Until now we were using
the closest clock rate possible with integer N-M factors. This resulted
in audio playback being slightly slower than it should be.

The vendor kernel gets around this (for newer SoCs) by using sigma-delta
modulation to generate a fractional-N factor. As the PLL hardware is
identical in most chips, we can back port the settings from the newer
SoC, in this case the H3, onto the A33.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>