1. use ioremap() for registers access, this improves the portability
of the driver (e.g. same IP on different processor with different
I/O memory range), and make it possible to remove those registers
definition in pxa-regs.h as PXA is undergoing a clean-up of that
header file
2. use device specific IRQ instead of hardcoded IRQ_KEYPAD, same
reason as above
3. clean up the error handling path in _probe()
4. remove DRIVER_NAME and use pdev->name when necessary, we don't
actually need a constant string literals
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
1. Rotary encoder events can be configured either as relative events
as the legacy code does or as any specified key code, this is
useful on some platform which uses the rotary keys as
KEY_{UP/DOWN/LEFT/RIGHT}
2. Add support for direct keys, the corresponding keycodes for each
direct key can now be specified within the platform data
3. Remove the direct/rotary key detection code from the IRQ handler
to dedicated functions to improve readability
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Introduce pxa27x_keypad_config() for keypad registers configuration
and remove the reg_kpc, reg_kprec from platform data structure
so that configurations of keypad registers can be centralized to a
single function.
It can also be re-used when resuming.
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
1. Introduce the "struct pxa27x_keypad" structure for driver specific
information, such as "struct clk", generated matrix key codes and
so on
2. Use KEY() macro to define matrix keys, instead of original 8x8 map
this makes definition easier with keypad where keys are sparse
3. Keep a generated array in "struct pxa27x_keypad" for fast lookup
4. Separate the matrix scan into a dedicated function for readability
and report only those keys whose state has been changed, instead
of report all states
5. Make use of KPAS to decide the faster path if only one key has been
detected
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
The pin configurations will slowly be moved to the board specific code
at initialization thus to make the driver more generic.
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
The controller should really be called keypad, and also align
the naming of functions and structures to use "pxa27x_keypad"
as prefix, instead of "pxakbd".
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
