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i2c: core: Add support for 'i2c-bus' subnode 

If the 'i2c-bus' device-tree node is present for an I2C adapter then
parse this subnode for I2C slaves.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Jon Hunter 2016-06-29 10:17:53 +01:00 committed by Thierry Reding
parent 98b0048845
commit 7e4c224abf
1 changed files with 8 additions and 2 deletions
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10
drivers/i2c/i2c-core.c
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@ -1411,7 +1411,7 @@ static struct i2c_client *of_i2c_register_device(struct i2c_adapter *adap,
static void of_i2c_register_devices(struct i2c_adapter *adap)
{
struct device_node *node;
struct device_node *bus, *node;
/* Only register child devices if the adapter has a node pointer set */
if (!adap->dev.of_node)
@ -1419,11 +1419,17 @@ static void of_i2c_register_devices(struct i2c_adapter *adap)
dev_dbg(&adap->dev, "of_i2c: walking child nodes\n");
for_each_available_child_of_node(adap->dev.of_node, node) {
bus = of_get_child_by_name(adap->dev.of_node, "i2c-bus");
if (!bus)
bus = of_node_get(adap->dev.of_node);
for_each_available_child_of_node(bus, node) {
if (of_node_test_and_set_flag(node, OF_POPULATED))
continue;
of_i2c_register_device(adap, node);
}
of_node_put(bus);
}
static int of_dev_node_match(struct device *dev, void *data)