clk_set_phase is probably most used for sample tuning stuff, and the caller will check whether finding a good degree or not to decide how to implement the algorithm for catching the best sample window. Not all of the phases are supportted by clock phase generator. So the drivers which call clk_set_phase may result in setting the phase which is not requestted, which will fininally makes the tuning result different. Especially for the cross-platform drivers, they can be used for different Socs, so it must care the actual phase supported by different clock phase generators.
This RFC patchset introduces new API for phase stuff which parallels rate stuff to meet the requirement. Based on tag of v4.5-rc5 git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git Shawn Lin (3): clk: add clk_round_phase support clk: add clk_hw_set_phase_range support Documentation: clk: Add clk phase callback comments Documentation/clk.txt | 5 ++ drivers/clk/clk.c | 147 ++++++++++++++++++++++++++++++++++++++++--- include/linux/clk-provider.h | 23 ++++++- include/linux/clk.h | 23 +++++++ 4 files changed, 187 insertions(+), 11 deletions(-) -- 2.3.7
