linux-kernel - Re: [PATCH 00/19] clk: amlogic: Add PLLs and peripheral clocks for A4 and A5 SoCs

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Message-ID: <1jv7kz3w1p.fsf@starbuckisacylon.baylibre.com>
Date: Wed, 01 Oct 2025 09:45:06 +0200
From: Jerome Brunet <jbrunet@...libre.com>
To: Chuan Liu via B4 Relay <devnull+chuan.liu.amlogic.com@...nel.org>
Cc: Michael Turquette <mturquette@...libre.com>,  Stephen Boyd
 <sboyd@...nel.org>,  Rob Herring <robh@...nel.org>,  Krzysztof Kozlowski
 <krzk+dt@...nel.org>,  Conor Dooley <conor+dt@...nel.org>,  Neil Armstrong
 <neil.armstrong@...aro.org>,  Kevin Hilman <khilman@...libre.com>,  Martin
 Blumenstingl <martin.blumenstingl@...glemail.com>,  chuan.liu@...ogic.com,
  linux-kernel@...r.kernel.org,  linux-clk@...r.kernel.org,
  devicetree@...r.kernel.org,  linux-amlogic@...ts.infradead.org,
  linux-arm-kernel@...ts.infradead.org,  Xianwei Zhao
 <xianwei.zhao@...ogic.com>
Subject: Re: [PATCH 00/19] clk: amlogic: Add PLLs and peripheral clocks for
 A4 and A5 SoCs

On Tue 30 Sep 2025 at 17:37, Chuan Liu via B4 Relay <devnull+chuan.liu.amlogic.com@...nel.org> wrote:

> This patch series includes changes related to the PLL and peripheral
> clocks for both the A4 and A5 SoCs.
>
> The patches for A5 were previously submitted up to V3 by Xianwei.
> https://lore.kernel.org/all/20250103-a5-clk-v3-0-a207ce83b9e9@amlogic.com/
> After friendly coordination, I’ve taken over and continued the
> submission as part of this series. The dt-bindings patch retains Rob's
> original "Reviewed-by" tag, and I hope this hasn’t caused any
> additional confusion.

... and yet you restart the versioning of the series making it harder
for people to follow that

>
> Both A4 and A5 belong to the Audio series. Judging by their names, one
> might assume that A5 is an upgrade to A4, but in fact, A5 was released
> a year earlier than A4.
>
> Since there are differences in the PLLs and peripheral clocks between
> the A4 and A5 SoCs (especially the PLL), and taking into account factors
> such as memory footprint and maintainability, this series does not
> attempt to merge the two into a shared driver as was done for
> G12A/G12B/SM1.

... and we end up with 19 patches series while it could be splitted into
manageable series, for each controller of each SoC

>
> This patch series includes all related dt-bindings, driver, and dts
> changes for the PLLs and peripheral clocks. Following our past convention
> for clock-related submissions, the dts changes are placed at the end
> and submitted separately. If this ordering makes it harder for
> maintainers to review or pick patches, please feel free to point it out.
>
> Co-developed-by: Xianwei Zhao <xianwei.zhao@...ogic.com>
> Signed-off-by: Xianwei Zhao <xianwei.zhao@...ogic.com>
> Signed-off-by: Chuan Liu <chuan.liu@...ogic.com>
> ---
> Chuan Liu (19):
>       dt-bindings: clock: Add Amlogic A4 SCMI clock controller
>       dt-bindings: clock: Add Amlogic A4 PLL clock controller
>       dt-bindings: clock: Add Amlogic A4 peripherals clock controller
>       clk: amlogic: Optimize PLL enable timing
>       clk: amlogic: Correct l_detect bit control
>       clk: amlogic: Fix out-of-range PLL frequency setting
>       clk: amlogic: Add A4 PLL clock controller driver
>       clk: amlogic: Add A4 clock peripherals controller driver
>       arm64: dts: amlogic: A4: Add scmi-clk node
>       arm64: dts: amlogic: A4: Add PLL controller node
>       arm64: dts: amlogic: A4: Add peripherals clock controller node
>       dt-bindings: clock: Add Amlogic A5 SCMI clock controller support
>       dt-bindings: clock: Add Amlogic A5 PLL clock controller
>       dt-bindings: clock: Add Amlogic A5 peripherals clock controller
>       clk: amlogic: Add A5 PLL clock controller driver
>       clk: amlogic: Add A5 clock peripherals controller driver
>       arm64: dts: amlogic: A5: Add scmi-clk node
>       arm64: dts: amlogic: A5: Add PLL controller node
>       arm64: dts: amlogic: A5: Add peripheral clock controller node
>
>  .../clock/amlogic,a4-peripherals-clkc.yaml         | 122 +++
>  .../bindings/clock/amlogic,a4-pll-clkc.yaml        |  61 ++
>  .../clock/amlogic,a5-peripherals-clkc.yaml         | 134 ++++
>  .../bindings/clock/amlogic,a5-pll-clkc.yaml        |  63 ++
>  arch/arm64/boot/dts/amlogic/amlogic-a4.dtsi        |  80 ++
>  arch/arm64/boot/dts/amlogic/amlogic-a5.dtsi        |  87 ++
>  drivers/clk/meson/Kconfig                          |  53 ++
>  drivers/clk/meson/Makefile                         |   4 +
>  drivers/clk/meson/a1-pll.c                         |   1 +
>  drivers/clk/meson/a4-peripherals.c                 | 764 ++++++++++++++++++
>  drivers/clk/meson/a4-pll.c                         | 242 ++++++
>  drivers/clk/meson/a5-peripherals.c                 | 883 +++++++++++++++++++++
>  drivers/clk/meson/a5-pll.c                         | 476 +++++++++++
>  drivers/clk/meson/clk-pll.c                        |  76 +-
>  drivers/clk/meson/clk-pll.h                        |   2 +
>  .../clock/amlogic,a4-peripherals-clkc.h            | 129 +++
>  include/dt-bindings/clock/amlogic,a4-pll-clkc.h    |  15 +
>  include/dt-bindings/clock/amlogic,a4-scmi-clkc.h   |  42 +
>  .../clock/amlogic,a5-peripherals-clkc.h            | 132 +++
>  include/dt-bindings/clock/amlogic,a5-pll-clkc.h    |  24 +
>  include/dt-bindings/clock/amlogic,a5-scmi-clkc.h   |  44 +
>  21 files changed, 3406 insertions(+), 28 deletions(-)
> ---
> base-commit: 01f3a6d1d59b8e25a6de243b0d73075cf0415eaf
> change-id: 20250928-a4_a5_add_clock_driver-2b7c9d695633
>
> Best regards,

-- 
Jerome