Fix the the runtime suspend power management not working issue when system
starts up and before user touches the trackpad device.
TEST=test on Chromebook.
Signed-off-by: NDudley Du <dudl@cypress.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Gen5 and Gen6 trackpad devices are able to detect and report object
proximity data/events, add this function support in the cyapa driver
through the ABS_DISTANCE event.
Signed-off-by: NDudley Du <dudl@cypress.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Based on the cyapa core, add support for basic functionality of the gen6
trackpad devices. The driver can automatically determine what protocol
(gen3, gen5, or gen6) should be used with the attached trackpad device.
Signed-off-by: NDudley Du <dudl@cypress.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Change 'gen5' to 'pip' for all macros, variables and functions that are
shared between gen5 and gen6 modules to make naming more clear and
readable.

Also fix a few spelling errors.
Signed-off-by: NDudley Du <dudl@cypress.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Signed-off-by: NShailendra Verma <shailendra.capricorn@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/mouse/cyapa_gen5.c: In function ‘cyapa_gen5_read_idac_data’:
drivers/input/mouse/cyapa_gen5.c:1876: warning: ‘max_element_cnt’ may be used uninitialized in this function
drivers/input/mouse/cyapa_gen5.c:1873: warning: ‘offset’ may be used uninitialized in this function

If *data_size is non-zero, and idac_data_type contains an unknown type,
max_element_cnt and offset will be uninitialized, and the loop will
process non-existing data.

However, this cannot happen (for now), as there's a test for unknown
types at the top of cyapa_gen5_read_idac_data().

As no "if ... else if ..." is used in other places, remove the
superfluous "if" to silence the compiler warning.
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Acked-by: NDudley Du <dudl@cypress.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Use asm/unaligned.h instead of linux/unaligned/access_ok.h header file to
fix compiling issues such as following while doing cross platform
compiling:

"include/linux/unaligned/access_ok.h:7:19: error: redefinition of
 'get_unaligned_le16'
...
include/linux/unaligned/le_struct.h:6:19: note: previous definition of
 'get_unaligned_le16' was here".
Reported-by: Nkbuild test robot <kbuild-all@01.org>
Signed-off-by: NDudley Du <dudl@cypress.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Fixes the warning regarding variable being dereferenced before check
'gen5_pip->resp_len'.
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDudley Du <dudl@cypress.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

gen5_bl_metadata_row_params structure has its fields specified with
explicit endianness, so we should not be trying to convert to native CPU
endianness when filling the structure.

Also fix firmware validation checks and misspelled field in
gen5_bl_metadata_row_params.
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Reviewed-by: NDudley Du <dudl@cypress.com>
Tested-by: NDudley Du <dudl@cypress.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Add force re-calibrate function support for gen5 trackpad device, it can be
used through sysfs calibrate interface.
Signed-off-by: NDudley Du <dudl@cypress.com>
Tested-by: NJeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Add read baseline function support for gen5 trackpad device, it can be used
through sysfs baseline interface.
Signed-off-by: NDudley Du <dudl@cypress.com>
Tested-by: NJeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

Add firmware image update support for gen5 trackpad device, it can be used
through sysfs update_fw interface.
Signed-off-by: NDudley Du <dudl@cypress.com>
Tested-by: NJeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>

This change adds support for Gen5 Cypress trackpads. The driver detects
generation of the device at probe time and automatically selects
appropriate protocol.
Signed-off-by: NDudley Du <dudl@cypress.com>
Tested-by: NJeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>