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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>
This commit is contained in:
Kuninori Morimoto 2016-08-08 05:59:56 +00:00 committed by Mark Brown
parent bc0ba64db9
commit bb6fc620c2
2 changed files with 38 additions and 0 deletions
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8
include/sound/simple_card_utils.h
View File

@ -33,4 +33,12 @@ int asoc_simple_card_set_dailink_name(struct device *dev,
int asoc_simple_card_parse_card_name(struct snd_soc_card *card,
char *prefix);
#define asoc_simple_card_parse_clk_cpu(node, dai_link, simple_dai) \
asoc_simple_card_parse_clk(node, dai_link->cpu_of_node, simple_dai)
#define asoc_simple_card_parse_clk_codec(node, dai_link, simple_dai) \
asoc_simple_card_parse_clk(node, dai_link->codec_of_node, simple_dai)
int asoc_simple_card_parse_clk(struct device_node *node,
struct device_node *dai_of_node,
struct asoc_simple_dai *simple_dai);
#endif /* __SIMPLE_CARD_CORE_H */

30
sound/soc/generic/simple-card-utils.c
View File

@ -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 @@ int asoc_simple_card_parse_card_name(struct snd_soc_card *card,
}
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");