ALSA: AOA: Convert onyx and tas codecs to new-style i2c drivers

The legacy i2c binding model is going away soon, so convert the AOA
codec drivers to the new model or they'll break.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: Johannes Berg <johannes@sipsolutions.net>
Tested-by: Andreas Schwab <schwab@linux-m68k.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 53 insertions, 23 deletions

diff --git a/sound/aoa/codecs/onyx.c b/sound/aoa/codecs/onyx.c
index 15500b9d2da0..84bb07d39a7f 100644
--- a/sound/aoa/codecs/onyx.c
+++ b/sound/aoa/codecs/onyx.c
@@ -47,7 +47,7 @@ MODULE_DESCRIPTION("pcm3052 (onyx) codec driver for snd-aoa");
 struct onyx {
         /* cache registers 65 to 80, they are write-only! */
         u8                      cache[16];
-        struct i2c_client       i2c;
+        struct i2c_client       *i2c;
         struct aoa_codec        codec;
         u32                     initialised:1,
                                 spdif_locked:1,
@@ -72,7 +72,7 @@ static int onyx_read_register(struct onyx *onyx, u8 reg, u8 *value)
                 *value = onyx->cache[reg-FIRSTREGISTER];
                 return 0;
         }
-        v = i2c_smbus_read_byte_data(&onyx->i2c, reg);
+        v = i2c_smbus_read_byte_data(onyx->i2c, reg);
         if (v < 0)
                 return -1;
         *value = (u8)v;
@@ -84,7 +84,7 @@ static int onyx_write_register(struct onyx *onyx, u8 reg, u8 value)
 {
         int result;
 
-        result = i2c_smbus_write_byte_data(&onyx->i2c, reg, value);
+        result = i2c_smbus_write_byte_data(onyx->i2c, reg, value);
         if (!result)
                 onyx->cache[reg-FIRSTREGISTER] = value;
         return result;
@@ -996,12 +996,45 @@ static void onyx_exit_codec(struct aoa_codec *codec)
         onyx->codec.soundbus_dev->detach_codec(onyx->codec.soundbus_dev, onyx);
 }
 
-static struct i2c_driver onyx_driver;
-
 static int onyx_create(struct i2c_adapter *adapter,
                        struct device_node *node,
                        int addr)
 {
+        struct i2c_board_info info;
+        struct i2c_client *client;
+
+        memset(&info, 0, sizeof(struct i2c_board_info));
+        strlcpy(info.type, "aoa_codec_onyx", I2C_NAME_SIZE);
+        info.addr = addr;
+        info.platform_data = node;
+        client = i2c_new_device(adapter, &info);
+        if (!client)
+                return -ENODEV;
+
+        /*
+         * We know the driver is already loaded, so the device should be
+         * already bound. If not it means binding failed, which suggests
+         * the device doesn't really exist and should be deleted.
+         * Ideally this would be replaced by better checks _before_
+         * instantiating the device.
+         */
+        if (!client->driver) {
+                i2c_unregister_device(client);
+                return -ENODEV;
+        }
+
+        /*
+         * Let i2c-core delete that device on driver removal.
+         * This is safe because i2c-core holds the core_lock mutex for us.
+         */
+        list_add_tail(&client->detected, &client->driver->clients);
+        return 0;
+}
+
+static int onyx_i2c_probe(struct i2c_client *client,
+                          const struct i2c_device_id *id)
+{
+        struct device_node *node = client->dev.platform_data;
         struct onyx *onyx;
         u8 dummy;
 
@@ -1011,20 +1044,12 @@ static int onyx_create(struct i2c_adapter *adapter,
                 return -ENOMEM;
 
         mutex_init(&onyx->mutex);
-        onyx->i2c.driver = &onyx_driver;
-        onyx->i2c.adapter = adapter;
-        onyx->i2c.addr = addr & 0x7f;
-        strlcpy(onyx->i2c.name, "onyx audio codec", I2C_NAME_SIZE);
-
-        if (i2c_attach_client(&onyx->i2c)) {
-                printk(KERN_ERR PFX "failed to attach to i2c\n");
-                goto fail;
-        }
+        onyx->i2c = client;
+        i2c_set_clientdata(client, onyx);
 
         /* we try to read from register ONYX_REG_CONTROL
          * to check if the codec is present */
         if (onyx_read_register(onyx, ONYX_REG_CONTROL, &dummy) != 0) {
-                i2c_detach_client(&onyx->i2c);
                 printk(KERN_ERR PFX "failed to read control register\n");
                 goto fail;
         }
@@ -1036,14 +1061,14 @@ static int onyx_create(struct i2c_adapter *adapter,
         onyx->codec.node = of_node_get(node);
 
         if (aoa_codec_register(&onyx->codec)) {
-                i2c_detach_client(&onyx->i2c);
                 goto fail;
         }
         printk(KERN_DEBUG PFX "created and attached onyx instance\n");
         return 0;
  fail:
+        i2c_set_clientdata(client, NULL);
         kfree(onyx);
-        return -EINVAL;
+        return -ENODEV;
 }
 
 static int onyx_i2c_attach(struct i2c_adapter *adapter)
@@ -1080,28 +1105,33 @@ static int onyx_i2c_attach(struct i2c_adapter *adapter)
         return onyx_create(adapter, NULL, 0x47);
 }
 
-static int onyx_i2c_detach(struct i2c_client *client)
+static int onyx_i2c_remove(struct i2c_client *client)
 {
-        struct onyx *onyx = container_of(client, struct onyx, i2c);
-        int err;
+        struct onyx *onyx = i2c_get_clientdata(client);
 
-        if ((err = i2c_detach_client(client)))
-                return err;
         aoa_codec_unregister(&onyx->codec);
         of_node_put(onyx->codec.node);
         if (onyx->codec_info)
                 kfree(onyx->codec_info);
+        i2c_set_clientdata(client, onyx);
         kfree(onyx);
         return 0;
 }
 
+static const struct i2c_device_id onyx_i2c_id[] = {
+        { "aoa_codec_onyx", 0 },
+        { }
+};
+
 static struct i2c_driver onyx_driver = {
         .driver = {
                 .name = "aoa_codec_onyx",
                 .owner = THIS_MODULE,
         },
         .attach_adapter = onyx_i2c_attach,
-        .detach_client = onyx_i2c_detach,
+        .probe = onyx_i2c_probe,
+        .remove = onyx_i2c_remove,
+        .id_table = onyx_i2c_id,
 };
 
 static int __init onyx_init(void)