Re: [PATCH RFC 0/8] clk: sunxi-ng: Add support for Allwinner A733 CCU and PRCM

[Jerome Brunet <jbrunet@baylibre.com>]

On mar. 10 mars 2026 at 16:33, Junhui Liu <junhui.liu@pigmoral.tech> wrote:

> Add support for the main CCU and the PRCM module (R-CCU) found in the
> Allwinner A733 SoC. The clock architecture of the A733 is an evolution
> of the previous A523 design but introduces several significant changes.
>
> One of the key changes is the introduction of a "pll-ref" clock that
> normalizes the physical oscillator frequency (which can be 19.2MHz,
> 24MHz, or 26MHz) into a consistent 24MHz reference for the entire clock
> tree. Additionally, while the A733 inherits many module clock structures
> from the A523, the MCU_CCU has been removed, and the overall clock tree
> has been expanded to support more new functional units.
>
> Also update the sunxi-ng SDM (Sigma-Delta Modulation) helper to support
> a new dual-pattern register design. On the A733, the SDM enable bit has
> been moved from the main PLL register to a second pattern register
> (PATTERN1). The driver is updated to handle this register layout to
> ensure accurate frequency synthesis for "pll-audio0".
>
> This is marked as RFC because the parent clocks for several instances in
> the main CCU are difficult to determine as the user manual provides
> limited information on their specific clock sources. In these cases, the
> implementation follows vendor practices and previous SoC designs,
> generally defaulting to "hosc" where documentation is lacking. In
> contrast, the bus clock gates in the PRCM (R-CCU) are explicitly defined
> based on the Memory Map in the manual, which clearly associates each
> module with its respective bus. Feedback or insights on these specific
> clock parents would be greatly appreciated.
>
> This functionally relies on the RTC series for the A733 SoC [1].
>
> Link: https://lore.kernel.org/all/20260121-a733-rtc-v1-0-d359437f23a7@pigmoral.tech/ [1]
>

Tested-by: Jerome Brunet <jbrunet@baylibre.com>

> ---
> Junhui Liu (8):
>       dt-bindings: clk: sun60i-a733-ccu: Add allwinner A733 support
>       clk: sunxi-ng: sdm: Add dual patterns support
>       clk: sunxi-ng: a733: Add PRCM CCU
>       clk: sunxi-ng: a733: Add PLL clocks support
>       clk: sunxi-ng: a733: Add bus clocks support
>       clk: sunxi-ng: a733: Add mod clocks support
>       clk: sunxi-ng: a733: Add bus clock gates
>       clk: sunxi-ng: a733: Add reset lines
>
>  .../bindings/clock/allwinner,sun60i-a733-ccu.yaml  |  107 +
>  drivers/clk/sunxi-ng/Kconfig                       |   10 +
>  drivers/clk/sunxi-ng/Makefile                      |    4 +
>  drivers/clk/sunxi-ng/ccu-sun60i-a733-r.c           |  276 +++
>  drivers/clk/sunxi-ng/ccu-sun60i-a733.c             | 2375 ++++++++++++++++++++
>  drivers/clk/sunxi-ng/ccu_sdm.c                     |   51 +-
>  drivers/clk/sunxi-ng/ccu_sdm.h                     |   32 +-
>  include/dt-bindings/clock/sun60i-a733-ccu.h        |  289 +++
>  include/dt-bindings/clock/sun60i-a733-r-ccu.h      |   39 +
>  include/dt-bindings/reset/sun60i-a733-ccu.h        |  131 ++
>  include/dt-bindings/reset/sun60i-a733-r-ccu.h      |   23 +
>  11 files changed, 3311 insertions(+), 26 deletions(-)
> ---
> base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f
> change-id: 20260202-a733-clk-0d4fc00a9f9c
>
> Best regards,

-- 
Jerome