do_writeval now always checks the return value, whether we expect
success or a specific error. Also add new macro writeval_inval to
simplify repeated use of do_writeval to test for EINVAL return code.
Signed-off-by: Jeff McGee <jeff.mcgee@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Bionic C library may not re-read a buffered, read-only file which
results in failure to monitor changes in gt_cur_freq_mhz.
Signed-off-by: Jeff McGee <jeff.mcgee@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Imo power management, power consumption and performance are tightly
enough coupled that we can throw them all into one bin.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
