ASoC: Reintroduce do_spi_write()

There is an unfortunate difference in return values between spi_write()
and i2c_master_send() so we need an adaptor function to translate.

Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

diff --git a/sound/soc/soc-cache.c b/sound/soc/soc-cache.c
index 01e5b98464360631c81364f67660d23307aa9489..06b7b81a16016f714b9bb2597dc705c0bab20ffb 100644 (file)
--- a/sound/soc/soc-cache.c
+++ b/sound/soc/soc-cache.c
@@ -20,6 +20,20 @@
 
 #include <trace/events/asoc.h>
 
+#ifdef CONFIG_SPI_MASTER
+static int do_spi_write(void *control, const char *data, int len)
+{
+       struct spi_device *spi = control;
+       int ret;
+
+       ret = spi_write(spi, data, len);
+       if (ret < 0)
+               return ret;
+
+       return len;
+}
+#endif
+
 static int do_hw_write(struct snd_soc_codec *codec, unsigned int reg,
                       unsigned int value, const void *data, int len)
 {
@@ -412,7 +426,7 @@ int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
 
        case SND_SOC_SPI:
 #ifdef CONFIG_SPI_MASTER
-               codec->hw_write = (hw_write_t)spi_write;
+               codec->hw_write = do_spi_write;
 #endif
 
                codec->control_data = container_of(codec->dev,