[alsa-devel] [PATCH] ASoC: Convert wm8750 to a new-style i2c driver (v2, testers wanted)
Jean Delvare
khali at linux-fr.org
Wed Aug 27 22:49:55 CEST 2008
Convert the wm8750 codec driver to the new (standard) device driver
binding model.
Signed-off-by: Jean Delvare <khali at linux-fr.org>
Acked-by: Mark Brown <broonie at opensource.wolfsonmicro.com>
---
This second version fixes a bug reported by Manuel Lauss where
codec->control_data was used before being initialized.
Warning: this assumes that the spitz has its codec chip on I2C bus 0,
which may or may not be the case. Someone with this machine please
test and report.
include/linux/i2c-id.h | 1
sound/soc/codecs/wm8750.c | 105 ++++++++++++++++++++++-----------------------
sound/soc/codecs/wm8750.h | 1
sound/soc/pxa/spitz.c | 1
4 files changed, 55 insertions(+), 53 deletions(-)
--- linux-2.6.27-rc4.orig/include/linux/i2c-id.h 2008-08-26 19:56:18.000000000 +0200
+++ linux-2.6.27-rc4/include/linux/i2c-id.h 2008-08-27 22:46:24.000000000 +0200
@@ -65,7 +65,6 @@
#define I2C_DRIVERID_DS1672 81 /* Dallas/Maxim DS1672 RTC */
#define I2C_DRIVERID_TLV320AIC23B 87 /* TI TLV320AIC23B audio codec */
#define I2C_DRIVERID_WM8731 89 /* Wolfson WM8731 audio codec */
-#define I2C_DRIVERID_WM8750 90 /* Wolfson WM8750 audio codec */
#define I2C_DRIVERID_WM8753 91 /* Wolfson WM8753 audio codec */
#define I2C_DRIVERID_LM4857 92 /* LM4857 Audio Amplifier */
#define I2C_DRIVERID_VP27SMPX 93 /* Panasonic VP27s tuner internal MPX */
--- linux-2.6.27-rc4.orig/sound/soc/codecs/wm8750.c 2008-08-26 19:56:18.000000000 +0200
+++ linux-2.6.27-rc4/sound/soc/codecs/wm8750.c 2008-08-27 22:45:24.000000000 +0200
@@ -846,83 +846,86 @@ static struct snd_soc_device *wm8750_soc
* low = 0x1a
* high = 0x1b
*/
-static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };
-/* Magic definition of all other variables and things */
-I2C_CLIENT_INSMOD;
-
-static struct i2c_driver wm8750_i2c_driver;
-static struct i2c_client client_template;
-
-static int wm8750_codec_probe(struct i2c_adapter *adap, int addr, int kind)
+static int wm8750_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
{
struct snd_soc_device *socdev = wm8750_socdev;
- struct wm8750_setup_data *setup = socdev->codec_data;
struct snd_soc_codec *codec = socdev->codec;
- struct i2c_client *i2c;
int ret;
- if (addr != setup->i2c_address)
- return -ENODEV;
-
- client_template.adapter = adap;
- client_template.addr = addr;
-
- i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
- if (i2c == NULL)
- return -ENOMEM;
-
i2c_set_clientdata(i2c, codec);
codec->control_data = i2c;
- ret = i2c_attach_client(i2c);
- if (ret < 0) {
- pr_err("failed to attach codec at addr %x\n", addr);
- goto err;
- }
-
ret = wm8750_init(socdev);
- if (ret < 0) {
+ if (ret < 0)
pr_err("failed to initialise WM8750\n");
- goto err;
- }
- return ret;
-err:
- kfree(i2c);
return ret;
}
-static int wm8750_i2c_detach(struct i2c_client *client)
+static int wm8750_i2c_remove(struct i2c_client *client)
{
struct snd_soc_codec *codec = i2c_get_clientdata(client);
- i2c_detach_client(client);
kfree(codec->reg_cache);
- kfree(client);
return 0;
}
-static int wm8750_i2c_attach(struct i2c_adapter *adap)
-{
- return i2c_probe(adap, &addr_data, wm8750_codec_probe);
-}
+static const struct i2c_device_id wm8750_i2c_id[] = {
+ { "wm8750", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, wm8750_i2c_id);
-/* corgi i2c codec control layer */
static struct i2c_driver wm8750_i2c_driver = {
.driver = {
.name = "WM8750 I2C Codec",
.owner = THIS_MODULE,
},
- .id = I2C_DRIVERID_WM8750,
- .attach_adapter = wm8750_i2c_attach,
- .detach_client = wm8750_i2c_detach,
- .command = NULL,
+ .probe = wm8750_i2c_probe,
+ .remove = wm8750_i2c_remove,
+ .id_table = wm8750_i2c_id,
};
-static struct i2c_client client_template = {
- .name = "WM8750",
- .driver = &wm8750_i2c_driver,
-};
+static int wm8750_add_i2c_device(struct platform_device *pdev,
+ const struct wm8750_setup_data *setup)
+{
+ struct i2c_board_info info;
+ struct i2c_adapter *adapter;
+ struct i2c_client *client;
+ int ret;
+
+ ret = i2c_add_driver(&wm8750_i2c_driver);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "can't add i2c driver\n");
+ return ret;
+ }
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ info.addr = setup->i2c_address;
+ strlcpy(info.type, "wm8750", I2C_NAME_SIZE);
+
+ adapter = i2c_get_adapter(setup->i2c_bus);
+ if (!adapter) {
+ dev_err(&pdev->dev, "can't get i2c adapter %d\n",
+ setup->i2c_bus);
+ goto err_driver;
+ }
+
+ client = i2c_new_device(adapter, &info);
+ i2c_put_adapter(adapter);
+ if (!client) {
+ dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
+ (unsigned int)info.addr);
+ goto err_driver;
+ }
+
+ return 0;
+
+err_driver:
+ i2c_del_driver(&wm8750_i2c_driver);
+ return -ENODEV;
+}
#endif
static int wm8750_probe(struct platform_device *pdev)
@@ -954,11 +957,8 @@ static int wm8750_probe(struct platform_
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
if (setup->i2c_address) {
- normal_i2c[0] = setup->i2c_address;
codec->hw_write = (hw_write_t)i2c_master_send;
- ret = i2c_add_driver(&wm8750_i2c_driver);
- if (ret != 0)
- printk(KERN_ERR "can't add i2c driver");
+ ret = wm8750_add_i2c_device(pdev, setup);
}
#else
/* Add other interfaces here */
@@ -1002,6 +1002,7 @@ static int wm8750_remove(struct platform
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+ i2c_unregister_device(codec->control_data);
i2c_del_driver(&wm8750_i2c_driver);
#endif
kfree(codec->private_data);
--- linux-2.6.27-rc4.orig/sound/soc/codecs/wm8750.h 2008-08-26 19:56:18.000000000 +0200
+++ linux-2.6.27-rc4/sound/soc/codecs/wm8750.h 2008-08-26 21:33:59.000000000 +0200
@@ -58,6 +58,7 @@
#define WM8750_SYSCLK 0
struct wm8750_setup_data {
+ int i2c_bus;
unsigned short i2c_address;
};
--- linux-2.6.27-rc4.orig/sound/soc/pxa/spitz.c 2008-08-26 19:56:18.000000000 +0200
+++ linux-2.6.27-rc4/sound/soc/pxa/spitz.c 2008-08-26 21:33:59.000000000 +0200
@@ -337,6 +337,7 @@ static struct snd_soc_machine snd_soc_ma
/* spitz audio private data */
static struct wm8750_setup_data spitz_wm8750_setup = {
+ .i2c_bus = 0,
.i2c_address = 0x1b,
};
--
Jean Delvare
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