Am 2019-11-08 17:07, schrieb Charles Keepax:
On Fri, Nov 08, 2019 at 12:15:48AM +0100, Michael Walle wrote:
This adds a new mode WM8904_CLK_AUTO which automatically enables the
FLL
if a frequency different than the MCLK is set.
These additions make the codec work with the simple-card driver in
general and especially in systems where the MCLK doesn't match the
requested clock.
Signed-off-by: Michael Walle <michael@xxxxxxxx>
---
+static int wm8904_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+ unsigned int freq, int dir)
+{
+ struct snd_soc_component *component = dai->component;
+ struct wm8904_priv *priv = snd_soc_component_get_drvdata(component);
+ unsigned long mclk_freq;
+ int ret;
+
+ switch (clk_id) {
+ case WM8904_CLK_AUTO:
+ mclk_freq = clk_get_rate(priv->mclk);
+ /* enable FLL if a different sysclk is desired */
+ if (mclk_freq != freq) {
+ priv->sysclk_src = WM8904_CLK_FLL;
+ ret = wm8904_set_fll(dai, WM8904_FLL_MCLK,
+ WM8904_FLL_MCLK,
+ clk_get_rate(priv->mclk), freq);
minor nit, might as well use mclk_freq rather than calling
clk_get_rate again, other than that though I think this looks
good.
whoops, I was too tired then. That was the whole intention of using the
mclk_freq variable.. so yes, I'll fix that.
-michael
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