[alsa-devel] [PATCH 09/39 v2] ASoC: simple-card-utils: add asoc_simple_card_parse_clk()

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx at renesas.com>

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 at renesas.com>
---
 include/sound/simple_card_utils.h     |  8 ++++++++
 sound/soc/generic/simple-card-utils.c | 30 ++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index 89172aa..b8a8649 100644
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -38,4 +38,12 @@ int asoc_simple_card_parse_card_prefix(struct snd_soc_card *card,
 				       struct snd_soc_codec_conf *codec_conf,
 				       char *prefix);
 
+#define asoc_simple_card_parse_clk_cpu(port_np, dai_link, simple_dai)\
+	asoc_simple_card_parse_clk(port_np, dai_link->cpu_of_node, simple_dai)
+#define asoc_simple_card_parse_clk_codec(port_np, dai_link, simple_dai)  \
+	asoc_simple_card_parse_clk(port_np, dai_link->codec_of_node, simple_dai)
+int asoc_simple_card_parse_clk(struct device_node *port_np,
+			       struct device_node *endpoint_np,
+			       struct asoc_simple_dai *simple_dai);
+
 #endif /* __SIMPLE_CARD_CORE_H */
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 439fc01..dbf4b00 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/of.h>
 #include <sound/simple_card_utils.h>
 
@@ -142,3 +143,32 @@ int asoc_simple_card_parse_card_prefix(struct snd_soc_card *card,
 	return 0;
 }
 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_card_prefix);
+
+int asoc_simple_card_parse_clk(struct device_node *port_np,
+			       struct device_node *endpoint_np,
+			       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(port_np, 0);
+	if (!IS_ERR(clk)) {
+		simple_dai->sysclk = clk_get_rate(clk);
+		simple_dai->clk = clk;
+	} else if (!of_property_read_u32(port_np, "system-clock-frequency", &val)) {
+		simple_dai->sysclk = val;
+	} else {
+		clk = of_clk_get(endpoint_np, 0);
+		if (!IS_ERR(clk))
+			simple_dai->sysclk = clk_get_rate(clk);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_parse_clk);
-- 
1.9.1