First patch adds a generic way for userspace to enable and disable an input device. Userspace interface is a sysfs entry. Device is enabled by writing '1' to enable entry and disabled by writing '0' to enabled entry. Current state can be read from the entry. Actual disabling happens via callback functions. If the device driver doesn't provide callback functions, write to sysfs entry returns an error code ENOSYS. Purpose is to provide a generic way to force some input device to disabled or enabled state regardless of the number of the users of that input device. When disabling of the device happens in the driver level, it is possible to turn off the corresponfing HW block to prevent unwanted activity. For example system wide keypad locking feature can utilize this feature. When several user space programs keep the input device open, one user space program can set input device to disabled state. Second patch utilizes new feature and adds HW level disable / enable feature to twl4030_keypad driver. Regardless of the number of users one control program can temporarily disable all keypad interrupts from the twl4030 keypad block. Keypad HW is also disabled during suspend mode. Samu Onkalo (2): input: enable / disable methods with sysfs entry input: twl4030_keypad enable / disable feature drivers/input/input.c | 45 +++++++++ drivers/input/keyboard/twl4030_keypad.c | 153 ++++++++++++++++++++++++++----- include/linux/input.h | 8 ++ 3 files changed, 183 insertions(+), 23 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
