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i2c: Add devicetree support 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-05-20 21:54:52 +02:00
parent 75ea5f1c0f
commit b1a4a659c6
2 changed files with 43 additions and 0 deletions
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42
drivers/i2c/i2c.c
View File

@ -254,6 +254,7 @@ struct i2c_client *i2c_new_device(struct i2c_adapter *adapter,
client->dev.platform_data = chip->platform_data;
client->dev.id = DEVICE_ID_DYNAMIC;
client->dev.bus = &i2c_bus;
client->dev.device_node = chip->of_node;
client->adapter = adapter;
client->addr = chip->addr;
@ -269,6 +270,45 @@ struct i2c_client *i2c_new_device(struct i2c_adapter *adapter,
}
EXPORT_SYMBOL(i2c_new_device);
void of_i2c_register_devices(struct i2c_adapter *adap)
{
struct device_node *n;
/* Only register child devices if the adapter has a node pointer set */
if (!IS_ENABLED(CONFIG_OFDEVICE) || !adap->dev.device_node)
return;
device_node_for_nach_child(adap->dev.device_node, n) {
struct i2c_board_info info = {};
struct i2c_client *result;
const __be32 *addr;
int len;
of_modalias_node(n, info.type, I2C_NAME_SIZE);
info.of_node = n;
addr = of_get_property(n, "reg", &len);
if (!addr || (len < sizeof(int))) {
dev_err(&adap->dev, "of_i2c: invalid reg on %s\n",
n->full_name);
continue;
}
info.addr = be32_to_cpup(addr);
if (info.addr > (1 << 10) - 1) {
dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n",
info.addr, n->full_name);
continue;
}
result = i2c_new_device(adap, &info);
if (!result)
dev_err(&adap->dev, "of_i2c: Failure registering %s\n",
n->full_name);
}
}
/**
* i2c_new_dummy - return a new i2c device bound to a dummy driver
* @adapter: the adapter managing the device
@ -408,6 +448,8 @@ int i2c_add_numbered_adapter(struct i2c_adapter *adapter)
/* populate children from any i2c device tables */
scan_boardinfo(adapter);
of_i2c_register_devices(adapter);
return 0;
}
EXPORT_SYMBOL(i2c_add_numbered_adapter);

1
include/i2c/i2c.h
View File

@ -102,6 +102,7 @@ struct i2c_board_info {
char type[I2C_NAME_SIZE]; /**< name of device */
unsigned short addr; /**< stored in i2c_client.addr */
void *platform_data; /**< platform data for device */
struct device_node *of_node;
};
/**