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, 6 insertions, 6 deletions

diff --git a/sound/soc/codecs/wm8978.c b/sound/soc/codecs/wm8978.c
index 28bb59ea6ea1..6866a6a80fec 100644
--- a/sound/soc/codecs/wm8978.c
+++ b/sound/soc/codecs/wm8978.c
@@ -438,7 +438,7 @@ static int wm8978_enum_mclk(unsigned int f_out, unsigned int f_mclk,
  */
 static int wm8978_configure_pll(struct snd_soc_codec *codec)
 {
-        struct wm8978_priv *wm8978 = codec->private_data;
+        struct wm8978_priv *wm8978 = snd_soc_codec_get_drvdata(codec);
         struct wm8978_pll_div pll_div;
         unsigned int f_opclk = wm8978->f_opclk, f_mclk = wm8978->f_mclk,
                 f_256fs = wm8978->f_256fs;
@@ -534,7 +534,7 @@ static int wm8978_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
                                  int div_id, int div)
 {
         struct snd_soc_codec *codec = codec_dai->codec;
-        struct wm8978_priv *wm8978 = codec->private_data;
+        struct wm8978_priv *wm8978 = snd_soc_codec_get_drvdata(codec);
         int ret = 0;
 
         switch (div_id) {
@@ -579,7 +579,7 @@ static int wm8978_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 wm8978_priv *wm8978 = codec->private_data;
+        struct wm8978_priv *wm8978 = snd_soc_codec_get_drvdata(codec);
         int ret = 0;
 
         dev_dbg(codec->dev, "%s: ID %d, freq %u\n", __func__, clk_id, freq);
@@ -691,7 +691,7 @@ static int wm8978_hw_params(struct snd_pcm_substream *substream,
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
         struct snd_soc_device *socdev = rtd->socdev;
         struct snd_soc_codec *codec = socdev->card->codec;
-        struct wm8978_priv *wm8978 = codec->private_data;
+        struct wm8978_priv *wm8978 = snd_soc_codec_get_drvdata(codec);
         /* Word length mask = 0x60 */
         u16 iface_ctl = snd_soc_read(codec, WM8978_AUDIO_INTERFACE) & ~0x60;
         /* Sampling rate mask = 0xe (for filters) */
@@ -911,7 +911,7 @@ static int wm8978_resume(struct platform_device *pdev)
 {
         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
         struct snd_soc_codec *codec = socdev->card->codec;
-        struct wm8978_priv *wm8978 = codec->private_data;
+        struct wm8978_priv *wm8978 = snd_soc_codec_get_drvdata(codec);
         int i;
         u16 *cache = codec->reg_cache;
 
@@ -1019,7 +1019,7 @@ static __devinit int wm8978_register(struct wm8978_priv *wm8978)
         INIT_LIST_HEAD(&codec->dapm_widgets);
         INIT_LIST_HEAD(&codec->dapm_paths);
 
-        codec->private_data = wm8978;
+        snd_soc_codec_set_drvdata(codec, wm8978);
         codec->name = "WM8978";
         codec->owner = THIS_MODULE;
         codec->bias_level = SND_SOC_BIAS_OFF;