ARM: sa11x0: Implement autoloading of codec and codec pdata for mcp bus.

Signed-off-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 42 insertions, 2 deletions

diff --git a/drivers/mfd/mcp-core.c b/drivers/mfd/mcp-core.c
index 84815f9ef636..63be60bc3455 100644
--- a/drivers/mfd/mcp-core.c
+++ b/drivers/mfd/mcp-core.c
@@ -26,9 +26,35 @@
 #define to_mcp(d)               container_of(d, struct mcp, attached_device)
 #define to_mcp_driver(d)        container_of(d, struct mcp_driver, drv)
 
+static const struct mcp_device_id *mcp_match_id(const struct mcp_device_id *id,
+                                                const char *codec)
+{
+        while (id->name[0]) {
+                if (strcmp(codec, id->name) == 0)
+                        return id;
+                id++;
+        }
+        return NULL;
+}
+
+const struct mcp_device_id *mcp_get_device_id(const struct mcp *mcp)
+{
+        const struct mcp_driver *driver =
+                to_mcp_driver(mcp->attached_device.driver);
+
+        return mcp_match_id(driver->id_table, mcp->codec);
+}
+EXPORT_SYMBOL(mcp_get_device_id);
+
 static int mcp_bus_match(struct device *dev, struct device_driver *drv)
 {
-        return 1;
+        const struct mcp *mcp = to_mcp(dev);
+        const struct mcp_driver *driver = to_mcp_driver(drv);
+
+        if (driver->id_table)
+                return !!mcp_match_id(driver->id_table, mcp->codec);
+
+        return 0;
 }
 
 static int mcp_bus_probe(struct device *dev)
@@ -74,9 +100,18 @@ static int mcp_bus_resume(struct device *dev)
         return ret;
 }
 
+static int mcp_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+        struct mcp *mcp = to_mcp(dev);
+
+        add_uevent_var(env, "MODALIAS=%s%s", MCP_MODULE_PREFIX, mcp->codec);
+        return 0;
+}
+
 static struct bus_type mcp_bus_type = {
         .name           = "mcp",
         .match          = mcp_bus_match,
+        .uevent         = mcp_bus_uevent,
         .probe          = mcp_bus_probe,
         .remove         = mcp_bus_remove,
         .suspend        = mcp_bus_suspend,
@@ -212,9 +247,14 @@ struct mcp *mcp_host_alloc(struct device *parent, size_t size)
 }
 EXPORT_SYMBOL(mcp_host_alloc);
 
-int mcp_host_register(struct mcp *mcp)
+int mcp_host_register(struct mcp *mcp, void *pdata)
 {
+        if (!mcp->codec)
+                return -EINVAL;
+
+        mcp->attached_device.platform_data = pdata;
         dev_set_name(&mcp->attached_device, "mcp0");
+        request_module("%s%s", MCP_MODULE_PREFIX, mcp->codec);
         return device_register(&mcp->attached_device);
 }
 EXPORT_SYMBOL(mcp_host_register);