This commit uses the new fixed-rate support on the composite clock to
unify osc24M_fixed and osc24M clocks, so it matches the actual hardware.
Signed-off-by: NEmilio López <emilio@elopez.com.ar>
Signed-off-by: NMike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: replace clk_register_gatable_osc with a call to
clk_register_composite]

clk_register will copy this information, so we can just use a normal
array and do one less dynamic allocation.
Signed-off-by: NEmilio López <emilio@elopez.com.ar>
Reviewed-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: NMike Turquette <mturquette@linaro.org>

This flag was in place to prevent important clocks from getting gated
while they had no users. Now that the UART driver supports clocks
properly, we can drop this.
Signed-off-by: NEmilio López <emilio@elopez.com.ar>
Reviewed-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: NMike Turquette <mturquette@linaro.org>

This patchset adds DT support for all the AXI, AHB, APB0 and APB1
gates present on sunxi SoCs.
Signed-off-by: NEmilio López <emilio@elopez.com.ar>
Reviewed-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: NMike Turquette <mturquette@linaro.org>

During the introduction of the Allwinner SoC platforms, sunxi was
initially meant as a generic name for all the variants of the Allwinner
SoC.

It was ok at the time of the support of only the A10 and A13 that
look pretty much the same; but it's beginning to be troublesome with
the future addition of the Allwinner A31 (sun6i) that is quite
different, and would introduce some weird logic, where sunxi would
actually mean in some case sun4i and sun5i but without sun6i...

Moreover, it makes the compatible strings naming scheme not consistent
with other architectures, where usually for this kind of compability, we
just use the oldest SoC name that has this IP, so let's do just this.
Signed-off-by: NEmilio López <emilio@elopez.com.ar>
Signed-off-by: NMike Turquette <mturquette@linaro.org>

This commit implements the base CPU clocks for sunxi devices. It has
been tested using a slightly modified cpufreq driver from the
linux-sunxi 3.0 tree.

Additionally, document the new bindings introduced by this patch.

Idling:
    / # cat /sys/kernel/debug/clk/clk_summary
       clock                        enable_cnt  prepare_cnt  rate
    ---------------------------------------------------------------------
     osc32k                         0           0            32768
     osc24M_fixed                   0           0            24000000
        osc24M                      0           0            24000000
           apb1_mux                 0           0            24000000
              apb1                  0           0            24000000
           pll1                     0           0            60000000
              cpu                   0           0            60000000
                 axi                0           0            60000000
                    ahb             0           0            60000000
                       apb0         0           0            30000000
     dummy                          0           0            0

After "yes >/dev/null &":
    / # cat /sys/kernel/debug/clk/clk_summary
       clock                        enable_cnt  prepare_cnt  rate
    ---------------------------------------------------------------------
     osc32k                         0           0            32768
     osc24M_fixed                   0           0            24000000
        osc24M                      0           0            24000000
           apb1_mux                 0           0            24000000
              apb1                  0           0            24000000
           pll1                     0           0            1008000000
              cpu                   0           0            1008000000
                 axi                0           0            336000000
                    ahb             0           0            168000000
                       apb0         0           0            84000000
     dummy                          0           0            0
Signed-off-by: NEmilio López <emilio@elopez.com.ar>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NMike Turquette <mturquette@linaro.org>