mbox series

[v2,0/5] arm64: allwinner: a523: Enable CPU clocks

Message ID 20260917223913.1855301-1-andre.przywara@arm.com (mailing list archive)
Headers
Series arm64: allwinner: a523: Enable CPU clocks |

Message

Andre Przywara Sept. 17, 2026, 10:39 p.m. UTC 
Hi,

after a year (again?) an update to the A523 CPU clock series. I heeded
Chen-Yu's advice and generalised the update bit to cover both the "key"
use case and the now no longer fixed update bit (patch 1). I also
followed one of Krzysztof's suggestions around the binding headers.
For a changelog see below. Based on v7.3-rc1.
This clashes slightly with the already queued clock fixes from Junhui,
please let me know how I should play this.

==============================
This series adds support for the CPU clock controller in the Allwinner
A523/A527/T527 family of SoCs.

In contrast to all earlier Allwinner SoCs, this chip features a separate
CCU for the CPU clocks (one for each of the two clusters) and the DSU
clock.

Patches 1 and 2 add some slight enhancements to the sunxi-ng clock driver
framework, to generalise the update bit and allow clocks with just a
power-of-2 divider.
Patch 3 adds the binding document for the new CCU.
Patch 4 adds the actual clock driver, and patch 5 makes use of that by
adding the clock description to the SoC .dtsi.

Please have a look and test!

Cheers,
Andre

Changes in v2:
- rebase on v7.3-rc1
- cover CCU_FEATURE_KEY_FIELD in update bits generalisation
- explicitly include binding header in clock driver
- order clocks property before enable-method in DT nodes


Andre Przywara (5):
  clk: sunxi-ng: generalise update bit
  clk: sunxi-ng: mp: support clocks with just a shift register
  dt-bindings: clock: sun55i-a523-ccu: Add A523 CPU CCU clock controller
  clk: sunxi-ng: add support for the A523/T527 CPU CCU
  arm64: dts: allwinner: a523: add CPU clocks

 .../clock/allwinner,sun55i-a523-ccu.yaml      |  25 ++
 .../arm64/boot/dts/allwinner/sun55i-a523.dtsi |  22 ++
 drivers/clk/sunxi-ng/Kconfig                  |   5 +
 drivers/clk/sunxi-ng/Makefile                 |   2 +
 drivers/clk/sunxi-ng/ccu-sun55i-a523-cpu.c    | 340 ++++++++++++++++++
 drivers/clk/sunxi-ng/ccu-sun55i-a523-cpu.h    |  24 ++
 drivers/clk/sunxi-ng/ccu-sun55i-a523.c        |  12 +-
 drivers/clk/sunxi-ng/ccu-sun6i-rtc.c          |   4 +-
 drivers/clk/sunxi-ng/ccu_common.h             |   8 +-
 drivers/clk/sunxi-ng/ccu_div.c                |   3 +-
 drivers/clk/sunxi-ng/ccu_gate.c               |   6 +-
 drivers/clk/sunxi-ng/ccu_mp.c                 |   6 +-
 drivers/clk/sunxi-ng/ccu_mp.h                 |   8 +-
 drivers/clk/sunxi-ng/ccu_mux.c                |   8 +-
 drivers/clk/sunxi-ng/ccu_nm.c                 |   1 +
 .../dt-bindings/clock/sun55i-a523-cpu-ccu.h   |  13 +
 16 files changed, 456 insertions(+), 31 deletions(-)
 create mode 100644 drivers/clk/sunxi-ng/ccu-sun55i-a523-cpu.c
 create mode 100644 drivers/clk/sunxi-ng/ccu-sun55i-a523-cpu.h
 create mode 100644 include/dt-bindings/clock/sun55i-a523-cpu-ccu.h


base-commit: cee9395acd8043be0644b25c34bfa86623f2b935