ASoC: simple-card-utils: add asoc_simple_card_parse_clk()
Current simple-card can get clock via DT clocks or
"system-clock-frequency" property.
This patch makes it simple style standard
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 9599de6..16f65f9 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -7,6 +7,7 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+#include <linux/clk.h>
#include <linux/module.h>
#include <linux/of.h>
#include <sound/simple_card_utils.h>
@@ -97,6 +98,35 @@
}
EXPORT_SYMBOL_GPL(asoc_simple_card_parse_card_name);
+int asoc_simple_card_parse_clk(struct device_node *node,
+ struct device_node *dai_of_node,
+ struct asoc_simple_dai *simple_dai)
+{
+ struct clk *clk;
+ u32 val;
+
+ /*
+ * Parse dai->sysclk come from "clocks = <&xxx>"
+ * (if system has common clock)
+ * or "system-clock-frequency = <xxx>"
+ * or device's module clock.
+ */
+ clk = of_clk_get(node, 0);
+ if (!IS_ERR(clk)) {
+ simple_dai->sysclk = clk_get_rate(clk);
+ simple_dai->clk = clk;
+ } else if (!of_property_read_u32(node, "system-clock-frequency", &val)) {
+ simple_dai->sysclk = val;
+ } else {
+ clk = of_clk_get(dai_of_node, 0);
+ if (!IS_ERR(clk))
+ simple_dai->sysclk = clk_get_rate(clk);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_parse_clk);
+
/* Module information */
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");