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ASoC: WM8903: Create default platform data structure 

When no platform data is supplied, point pdata at a default platform
structure. This enables two future changes:

a) Defines the default platform data values in a single place.
b) There is always a valid pdata pointer, so some conditional code can
   be simplified by a later patch.

Based on work by John Bonesio, but significantly reworked since then.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Stephen Warren 2011-12-02 15:08:38 -07:00 committed by Mark Brown
parent 672b0c6a37
commit c0eb27cf84
1 changed files with 17 additions and 2 deletions
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19
sound/soc/codecs/wm8903.c
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@ -114,6 +114,7 @@ static const struct reg_default wm8903_reg_defaults[] = {
};
struct wm8903_priv {
struct wm8903_platform_data *pdata;
struct snd_soc_codec *codec;
struct regmap *regmap;
@ -1834,7 +1835,7 @@ static struct gpio_chip wm8903_template_chip = {
static void wm8903_init_gpio(struct snd_soc_codec *codec)
{
struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec);
struct wm8903_platform_data *pdata = dev_get_platdata(codec->dev);
struct wm8903_platform_data *pdata = wm8903->pdata;
int ret;
wm8903->gpio_chip = wm8903_template_chip;
@ -1872,8 +1873,8 @@ static void wm8903_free_gpio(struct snd_soc_codec *codec)
static int wm8903_probe(struct snd_soc_codec *codec)
{
struct wm8903_platform_data *pdata = dev_get_platdata(codec->dev);
struct wm8903_priv *wm8903 = snd_soc_codec_get_drvdata(codec);
struct wm8903_platform_data *pdata = wm8903->pdata;
int ret, i;
int trigger, irq_pol;
u16 val;
@ -2039,6 +2040,7 @@ static const struct regmap_config wm8903_regmap = {
static __devinit int wm8903_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8903_platform_data *pdata = dev_get_platdata(&i2c->dev);
struct wm8903_priv *wm8903;
unsigned int val;
int ret;
@ -2059,6 +2061,19 @@ static __devinit int wm8903_i2c_probe(struct i2c_client *i2c,
i2c_set_clientdata(i2c, wm8903);
wm8903->irq = i2c->irq;
/* If no platform data was supplied, create storage for defaults */
if (pdata) {
wm8903->pdata = pdata;
} else {
wm8903->pdata = devm_kzalloc(&i2c->dev,
sizeof(struct wm8903_platform_data),
GFP_KERNEL);
if (wm8903->pdata == NULL) {
dev_err(&i2c->dev, "Failed to allocate pdata\n");
return -ENOMEM;
}
}
ret = regmap_read(wm8903->regmap, WM8903_SW_RESET_AND_ID, &val);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to read chip ID: %d\n", ret);