tree e405057894dbd4a9319c72489486eb4950ba5818
parent 5b394b2ddf0347bef56e50c69a58773c94343ff3
author Chen-Yu Tsai <wens@csie.org> 1536240337 +0800
committer Maxime Ripard <maxime.ripard@bootlin.com> 1536308450 +0200
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clk: sunxi-ng: sun4i: Set VCO and PLL bias current to lowest setting

The default mid-level PLL bias current setting interferes with sigma
delta modulation. This manifests as decreased audio quality at lower
sampling rates, which sounds like radio broadcast quality, and
distortion noises at sampling rates at 48 kHz or above.

Changing the bias current settings to the lowest gets rid of the
noise.

Fixes: de3448519194 ("clk: sunxi-ng: sun4i: Use sigma-delta modulation
		      for audio PLL")
Cc: <stable@vger.kernel.org> # 4.15.x
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>