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Subject[RFC/RFT 00/14] arm64: g12a: add support for DVFS
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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]

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

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

.../boot/dts/amlogic/meson-g12-common.dtsi | 2464 +++++++++++++++++
.../boot/dts/amlogic/meson-g12a-sei510.dts | 55 +
.../boot/dts/amlogic/meson-g12a-u200.dts | 55 +
.../boot/dts/amlogic/meson-g12a-x96-max.dts | 52 +
arch/arm64/boot/dts/amlogic/meson-g12a.dtsi | 2462 +---------------
.../boot/dts/amlogic/meson-g12b-odroid-n2.dts | 96 +
arch/arm64/boot/dts/amlogic/meson-g12b.dtsi | 141 +-
drivers/clk/clk.c | 5 +
drivers/clk/meson/clk-regmap.c | 10 +-
drivers/clk/meson/clk-regmap.h | 5 +
drivers/clk/meson/g12a.c | 500 +++-
drivers/clk/meson/meson-eeclk.c | 6 +
drivers/clk/meson/meson-eeclk.h | 1 +
drivers/pinctrl/meson/pinctrl-meson-g12a.c | 9 +
drivers/soc/amlogic/meson-clk-measure.c | 14 +-
include/dt-bindings/clock/g12a-clkc.h | 1 +
include/linux/clk-provider.h | 1 +
17 files changed, 3412 insertions(+), 2465 deletions(-)
create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi

--
2.21.0

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