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Subject[PATCH v4 0/6] clk: fractional-divider: do a clean up
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The series provides a clean up for clk-fractional-diveder together with moving
it to use rational best approximation algorithm. I think the patches are
self-explanatory.

The series was tested with 8250_dw UART driver on Intel Braswell.

Patch 6 is an amendment to existing user of the fractional divider outside of
clock framework. Greg, it would be nice to have your Ack on this if no
objections.

Changelog v4:
- remove dependency to clk_div_mask() and use GENMASK() instead
- apply changes to rockchip
- amend 8250_dw driver to use proposed changes

Changelog v3:
- add patch 2/3 to simplify further usage
- don't use mult_frac() due to potential overflow on 32 bit kernels
- guarantee in ->round_rate() that m and n will not overflow

Changelog v2:
- move to rational_best_approximation() and mult_frac()
- add patch 2/2

Andy Shevchenko (6):
clk: fractional-divider: fix sparse warnings
clk: fractional-divider: rename prate -> parent_rate
clk: fractional-divider: keep mwidth and nwidth internally
clk: rockchip: save width in struct clk_fractional_divider
clk: fractional-divider: switch to rational best approximation
serial: 8250_dw: allow lower reference frequencies

drivers/clk/Kconfig | 1 +
drivers/clk/clk-fractional-divider.c | 90 ++++++++++++++++++++++--------------
drivers/clk/rockchip/clk.c | 6 ++-
drivers/tty/serial/8250/8250_dw.c | 4 --
include/linux/clk-provider.h | 3 +-
5 files changed, 62 insertions(+), 42 deletions(-)

--
2.1.4



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