[RFKILL]: Add support for hardware-only rfkill buttons
Buttons that work directly on hardware cannot support
the "user_claim" functionality. Add a flag to signal
this and return -EOPNOTSUPP in this case.
b43 is such a device.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/rfkill.h b/include/linux/rfkill.h
index 26fddea..0ce5e0b 100644
--- a/include/linux/rfkill.h
+++ b/include/linux/rfkill.h
@@ -52,6 +52,8 @@
* @type: Radio type which the button controls, the value stored
* here should be a value from enum rfkill_type.
* @state: State of the switch (on/off).
+ * @user_claim_unsupported: Whether the hardware supports exclusive
+ * RF-kill control by userspace. Set this before registering.
* @user_claim: Set when the switch is controlled exlusively by userspace.
* @mutex: Guards switch state transitions
* @data: Pointer to the RF button drivers private data which will be
@@ -69,6 +71,7 @@
enum rfkill_type type;
enum rfkill_state state;
+ bool user_claim_unsupported;
bool user_claim;
struct mutex mutex;