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>
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index d49f0ed..d08abf4 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -1640,6 +1640,36 @@
}
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