[RFC PATCH 08/13] i2c: core: Add support for 'i2c-bus' subnode
From: Jon Hunter <jonathanh@nvidia.com>
Date: 2016-06-17 12:03:42
Also in:
dri-devel, linux-gpio, linux-i2c, linux-tegra
Subsystem:
i2c subsystem, the rest · Maintainers:
Andi Shyti, Linus Torvalds
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> --- drivers/i2c/i2c-core.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 952d2f0c02c5..f552d97bad32 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c@@ -1452,7 +1452,7 @@ 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)
@@ -1460,11 +1460,18 @@ 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 = 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); } + + if (bus != adap->dev.of_node) + of_node_put(bus); } static int of_dev_node_match(struct device *dev, void *data)
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2.1.4