diff options
Diffstat (limited to 'drivers/clk/sunxi-ng/ccu-sun4i-a10.c')
| -rw-r--r-- | drivers/clk/sunxi-ng/ccu-sun4i-a10.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/clk/sunxi-ng/ccu-sun4i-a10.c b/drivers/clk/sunxi-ng/ccu-sun4i-a10.c index ffa5dac221e4..129ebd2588fd 100644 --- a/drivers/clk/sunxi-ng/ccu-sun4i-a10.c +++ b/drivers/clk/sunxi-ng/ccu-sun4i-a10.c @@ -1434,8 +1434,16 @@ static void __init sun4i_ccu_init(struct device_node *node, return; } - /* Force the PLL-Audio-1x divider to 1 */ val = readl(reg + SUN4I_PLL_AUDIO_REG); + + /* + * Force VCO and PLL bias current to lowest setting. Higher + * settings interfere with sigma-delta modulation and result + * in audible noise and distortions when using SPDIF or I2S. + */ + val &= ~GENMASK(25, 16); + + /* Force the PLL-Audio-1x divider to 1 */ val &= ~GENMASK(29, 26); writel(val | (1 << 26), reg + SUN4I_PLL_AUDIO_REG); |