Neil Armstrong [off-list ref] writes:

The G12A/G12B Socs embeds a specific clock tree for each CPU cluster :
cpu_clk / cpub_clk
|   \- cpu_clk_dyn
|      |  \- cpu_clk_premux0
|      |        |- cpu_clk_postmux0
|      |        |    |- cpu_clk_dyn0_div
|      |        |    \- xtal/fclk_div2/fclk_div3
|      |        \- xtal/fclk_div2/fclk_div3
|      \- cpu_clk_premux1
|            |- cpu_clk_postmux1
|            |    |- cpu_clk_dyn1_div
|            |    \- xtal/fclk_div2/fclk_div3
|            \- xtal/fclk_div2/fclk_div3
\ sys_pll / sys1_pll

This patchset adds notifiers on cpu_clk / cpub_clk, cpu_clk_dyn,
cpu_clk_premux0 and sys_pll / sys1_pll to permit change frequency of
the CPU clock in a safe way as recommended by the vendor Documentation
and reference code.

This patchset :
- introduces needed core and meson clk changes
- adds support for the G12B second cluster clock measurer ids
- protects clock measurer from cooncurent measures
- adds the clock notifiers
- moves the G12A DT to a common g12a-common dtsi
- adds the G12A and G12B OPPs
- enables DVFS on all supported boards

Dependencies:
- PWM AO input order fix at [1]
- PWM enhancements from Martin at [2]

Changes since RFT/RFC v1 at [3]:
- Added EXPORT_SYMBOL_GPL() to clk_hw_set_parent
- Added missing static to g12b_cpub_clk_mux0_div_ops and g12a_cpu_clk_mux_nb
- Simplified g12a_cpu_clk_mux_notifier_cb() without switch/case
- Fixed typo in "this the current path" in g12a.c
- Fixed G12B dtsi by adding back the sdio quirk
- Fixed G12A dtsi unwanted sdio quirk removal
- Fixed various checkpatch errors

[1] https://patchwork.kernel.org/patch/11006835/
[2] https://patchwork.kernel.org/patch/11006835/
[3] https://patchwork.kernel.org/cover/11006929/

Neil Armstrong (14):
  pinctrl: meson-g12a: add pwm_a on GPIOE_2 pinmux
  clk: core: introduce clk_hw_set_parent()
  clk: meson: regmap: export regmap_div ops functions
  clk: meson: eeclk: add setup callback
  soc: amlogic: meson-clk-measure: protect measure with a mutex
  soc: amlogic: meson-clk-measure: add G12B second cluster cpu clk
  clk: meson: g12a: add notifiers to handle cpu clock change
  clk: meson: g12a: expose CPUB clock ID for G12B
  arm64: dts: move common G12A & G12B modes to meson-g12-common.dtsi
  arm64: dts: meson-g12-common: add pwm_a on GPIOE_2 pinmux
  arm64: dts: meson-g12a: add cpus OPP table
  arm64: dts: meson-g12a: enable DVFS on G12A boards
  arm64: dts: meson-g12b: add cpus OPP tables
  arm64: dts: meson-g12b-odroid-n2: enable DVFS

The DT files don't apply cleanly to my tree (v5.3/dt64 branch).  Could
you rebase:

Then I can put into my testing branch, which gets included in 'integ'
and it will be easier for others to test.

Kevin


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