ASoC: Add indirection for CODEC private data

One of the features of the multi CODEC work is that it embeds a struct
device in the CODEC to provide diagnostics via a sysfs class rather than
via the device tree, at which point it's much better to use the struct
device private data rather than having two places to store it. Provide
an accessor function to allow this change to be made more easily, and
update all the CODEC drivers are updated.

To ensure use of the accessor the private data structure member is
renamed, meaning that if code developed with older an older core that
still uses private_data is merged it will fail to build.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c
index 31e39ffd1d8..b2f12828630 100644
--- a/sound/soc/codecs/wm8940.c
+++ b/sound/soc/codecs/wm8940.c
@@ -580,7 +580,7 @@ static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
                                  int clk_id, unsigned int freq, int dir)
 {
         struct snd_soc_codec *codec = codec_dai->codec;
-        struct wm8940_priv *wm8940 = codec->private_data;
+        struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
 
         switch (freq) {
         case 11289600:
@@ -772,7 +772,7 @@ static int wm8940_register(struct wm8940_priv *wm8940,
         INIT_LIST_HEAD(&codec->dapm_widgets);
         INIT_LIST_HEAD(&codec->dapm_paths);
 
-        codec->private_data = wm8940;
+        snd_soc_codec_set_drvdata(codec, wm8940);
         codec->name = "WM8940";
         codec->owner = THIS_MODULE;
         codec->bias_level = SND_SOC_BIAS_OFF;