ASoC: da7219: Add common clock usage for providing DAI clks

There is a need to use DA7219 as DAI clock master for other codecs
within a system, which means that the DAI clocks are required to
remain, regardless of whether the codec is actually running
playback/capture. To be able to expose control of the DAI clocking
the common clock framework has been employed.

The current implementation adds a simple clock gate for enabling
and disabling the DAI clocks, with no rate control supported
(this is still handled through standard hw_params() functions as
before). If DT is enabled then the clock is added to the OF
providers list, otherwise a clkdev lookup is used.

Signed-off-by: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/sound/soc/codecs/da7219.h b/sound/soc/codecs/da7219.h
index 1acb34cd12ad..1b00023e33cd 100644
--- a/sound/soc/codecs/da7219.h
+++ b/sound/soc/codecs/da7219.h
@@ -14,6 +14,9 @@
 #ifndef __DA7219_H
 #define __DA7219_H
 
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <sound/da7219.h>
@@ -813,6 +816,12 @@ struct da7219_priv {
 	struct mutex ctrl_lock;
 	struct mutex pll_lock;
 
+#ifdef CONFIG_COMMON_CLK
+	struct clk_hw dai_clks_hw;
+#endif
+	struct clk_lookup *dai_clks_lookup;
+	struct clk *dai_clks;
+
 	struct clk *mclk;
 	unsigned int mclk_rate;
 	int clk_src;