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| author |   Chen-Yu Tsai <wens@csie.org> | 2017-12-08 16:35:11 +0800 |
|---|---|---|
| committer |   Maxime Ripard <maxime.ripard@free-electrons.com> | 2017-12-08 10:08:18 +0100 |
| commit | 10e6eb4f2c5b35ae71c9bc0db83d74238719b453 (patch) | |
| tree | e341ad34f2b930075191887cd1bf8277ba817296 /drivers/clk/sunxi-ng/ccu-sun8i-a83t.c | |
| parent | clk: sunxi-ng: Support fixed post-dividers on NM style clocks (diff) | |
| download | linux-dev-10e6eb4f2c5b35ae71c9bc0db83d74238719b453.tar.xz linux-dev-10e6eb4f2c5b35ae71c9bc0db83d74238719b453.zip | |
clk: sunxi-ng: sun8i: a83t: Add /2 fixed post divider to audio PLL
On the A83T, the audio PLL should have its div1 set to 0, or /1, and
div2 set to 1, or /2. This setting is the default, and is required
to match the sigma-delta modulation parameters from the BSP kernel.
This patch adds a /2 fixed post divider to the audio PLL, and fixes
the enforced d1 & d2 values. This also resolves the mismatch between
the values mentioned in the comment for the audio PLL, and the actual
enforced values.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Diffstat (limited to 'drivers/clk/sunxi-ng/ccu-sun8i-a83t.c')
| -rw-r--r-- | drivers/clk/sunxi-ng/ccu-sun8i-a83t.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/clk/sunxi-ng/ccu-sun8i-a83t.c b/drivers/clk/sunxi-ng/ccu-sun8i-a83t.c index 5cedcd0d8be8..06b69e433d0f 100644 --- a/drivers/clk/sunxi-ng/ccu-sun8i-a83t.c +++ b/drivers/clk/sunxi-ng/ccu-sun8i-a83t.c @@ -81,10 +81,12 @@ static struct ccu_nm pll_audio_clk = { .lock = BIT(2), .n = _SUNXI_CCU_MULT_OFFSET_MIN_MAX(8, 8, 0, 12, 0), .m = _SUNXI_CCU_DIV(0, 6), + .fixed_post_div = 2, .common = { .reg = SUN8I_A83T_PLL_AUDIO_REG, .lock_reg = CCU_SUN8I_A83T_LOCK_REG, - .features = CCU_FEATURE_LOCK_REG, + .features = CCU_FEATURE_LOCK_REG | + CCU_FEATURE_FIXED_POSTDIV, .hw.init = CLK_HW_INIT("pll-audio", "osc24M", &ccu_nm_ops, CLK_SET_RATE_UNGATE), }, @@ -889,9 +891,10 @@ static int sun8i_a83t_ccu_probe(struct platform_device *pdev) if (IS_ERR(reg)) return PTR_ERR(reg); - /* Enforce d1 = 0, d2 = 0 for Audio PLL */ + /* Enforce d1 = 0, d2 = 1 for Audio PLL */ val = readl(reg + SUN8I_A83T_PLL_AUDIO_REG); - val &= ~(BIT(16) | BIT(18)); + val &= ~BIT(16); + val |= BIT(18); writel(val, reg + SUN8I_A83T_PLL_AUDIO_REG); /* Enforce P = 1 for both CPU cluster PLLs */ |