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authorLiam Girdwood <lrg@ti.com>2011-07-04 11:10:15 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-07-04 12:41:07 -0700
commitf1442bc1e9bd5ff4c2470d66075d066e535a2c86 (patch)
tree4042a6e01058d504cf8dba8484d32832547c33c3 /sound/soc
parent469bb638dc2a6ea87ea56256f25cc964deb3cf2b (diff)
downloadlinux-f1442bc1e9bd5ff4c2470d66075d066e535a2c86.tar.bz2
ASoC: core - Add platform read and write.
In preparation for ASoC Dynamic PCM (AKA DSP) support. Allow platform driver to perform IO. Intended for platform DAPM. Signed-off-by: Liam Girdwood <lrg@ti.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc')
-rw-r--r--sound/soc/soc-core.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index d49f0ed56f9c..d08abf4e3eb3 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1640,6 +1640,36 @@ int snd_soc_codec_writable_register(struct snd_soc_codec *codec,
}
EXPORT_SYMBOL_GPL(snd_soc_codec_writable_register);
+int snd_soc_platform_read(struct snd_soc_platform *platform,
+ unsigned int reg)
+{
+ unsigned int ret;
+
+ if (!platform->driver->read) {
+ dev_err(platform->dev, "platform has no read back\n");
+ return -1;
+ }
+
+ ret = platform->driver->read(platform, reg);
+ dev_dbg(platform->dev, "read %x => %x\n", reg, ret);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(snd_soc_platform_read);
+
+int snd_soc_platform_write(struct snd_soc_platform *platform,
+ unsigned int reg, unsigned int val)
+{
+ if (!platform->driver->write) {
+ dev_err(platform->dev, "platform has no write back\n");
+ return -1;
+ }
+
+ dev_dbg(platform->dev, "write %x = %x\n", reg, val);
+ return platform->driver->write(platform, reg, val);
+}
+EXPORT_SYMBOL_GPL(snd_soc_platform_write);
+
/**
* snd_soc_new_ac97_codec - initailise AC97 device
* @codec: audio codec