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authorOlof Johansson <olof@lixom.net>2012-07-21 11:47:25 -0700
committerRob Herring <rob.herring@calxeda.com>2012-09-07 15:30:14 -0500
commitee67016fcc58998c44a9c99b0721568b3d2edc6e (patch)
treec83da0436322788f81d8b8fb20ceebed876836be
parente38c0a1fbc5803cbacdaac0557c70ac8ca5152e7 (diff)
downloadlinux-ee67016fcc58998c44a9c99b0721568b3d2edc6e.tar.bz2
of: i2c: add support for wakeup-source property
Add support for specifying a generic "wakeup-source" property on i2c clients, which will set the I2C_CLIENT_WAKE flag, thus configuring the device to wake the system from suspend (via IRQ). This obviously doesn't make sense on devices lacking IRQ, but since we still allow that in the i2c_board_info case, I don't see a reason to restrict it here. Note: Since the generic i2c bindings aren't documented in the kernel, I didn't find a good place to add documentation for this binding extension. I still think it makes sense to have a generic property instead of having each device do its own binding for the same. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Rob Herring <rob.herring@calxeda.com>
-rw-r--r--drivers/of/of_i2c.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c
index 1e173f357674..3550f3bf4f92 100644
--- a/drivers/of/of_i2c.c
+++ b/drivers/of/of_i2c.c
@@ -61,6 +61,9 @@ void of_i2c_register_devices(struct i2c_adapter *adap)
info.of_node = of_node_get(node);
info.archdata = &dev_ad;
+ if (of_get_property(node, "wakeup-source", NULL))
+ info.flags |= I2C_CLIENT_WAKE;
+
request_module("%s%s", I2C_MODULE_PREFIX, info.type);
result = i2c_new_device(adap, &info);