A zero multiplier does not make sense for clocks.
Use 1 as the minimum when a multiplier minimum isn't specified.
Fixes: 2beaa601c8 ("clk: sunxi-ng: Implement minimum for multipliers")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Some multipliers have a maximum rate that is lower than what the register
width allows to. Add a field in the multiplier structure to allow CCU
driver to set that maximum.
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The factors we've seen so far all had an offset of one. However, on the
earlier Allwinner SoCs, some factors could have no offset at all, meaning
that the value computed to reach the rate we want to use was the one we had
to program in the registers.
Implement an additional field for the factors that can have such an offset
(linears, not based on a power of two) to specify that offset.
This offset is not linked to the extremums that can be specified in those
structures too. The minimum and maximum are representing the range of
values we can use to try to compute the best rate. The offset comes later
on when we want to set the best value in the registers.
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Allow the CCU drivers to specify a multiplier for their clocks.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Modify the current clocks we have to be able to specify the minimum for
each clocks we support, just like we support the max.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Some clocks still use an explicit list of arguments, which make it a bit
more tedious to add new parameters.
Convert those over to a structure pointer argument to add as many
arguments as possible without having to many noise in our patches, or a
very long list of arguments.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
make C=2 reports:
CHECK drivers/clk/sunxi-ng/ccu_nk.c
drivers/clk/sunxi-ng/ccu_nk.c:17:6: warning: symbol 'ccu_nk_find_best' was
not declared. Should it be static?
ccu_nk_find_best is only used within ccu_nk.c. So make it static to get
rid of this warning.
Fixes: adbfb0056e ("clk: sunxi-ng: Add N-K-factor clock support")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Chen-Yu Tsai