linux-kernel - Re: [PATCH v5 0/5] add support for T7 family clock controller

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Message-ID: <1jy0nvu5jz.fsf@starbuckisacylon.baylibre.com>
Date: Mon, 24 Nov 2025 10:46:08 +0100
From: Jerome Brunet <jbrunet@...libre.com>
To: Jian Hu <jian.hu@...ogic.com>
Cc: Xianwei Zhao <xianwei.zhao@...ogic.com>,  Chuan Liu
 <chuan.liu@...ogic.com>,  Neil Armstrong <neil.armstrong@...aro.org>,
  Kevin Hilman <khilman@...libre.com>,  "Stephen Boyd" <sboyd@...nel.org>,
  Michael Turquette <mturquette@...libre.com>,  "Dmitry Rokosov"
 <ddrokosov@...rdevices.ru>,  robh+dt <robh+dt@...nel.org>,  Rob Herring
 <robh@...nel.org>,  devicetree <devicetree@...r.kernel.org>,  linux-clk
 <linux-clk@...r.kernel.org>,  linux-amlogic
 <linux-amlogic@...ts.infradead.org>,  linux-kernel
 <linux-kernel@...r.kernel.org>,  linux-arm-kernel
 <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v5 0/5] add support for T7 family clock controller

On Fri 21 Nov 2025 at 18:59, Jian Hu <jian.hu@...ogic.com> wrote:

> It introduces three clock controllers:
> - SCMI clock controller: these clocks are managed by the SCP and handled through SCMI.
> - PLL clock controller.
> - peripheral clock controller.
>
> Changes v5 since v4 at [4]:
> - rename rtc and cec dualdiv clocks
> - rename dsp clocks
> - rename anakin clocks
> - rename fdiv2_divn to 25m and fix its parent
> - add flag for T7_COMP_GATE
> - use T7_COMP_SEL/DIV/GATE to define glitch clocks
> - add CLK_SET_RATE_NO_REPARENT for t7_eth_rmii_sel and rtc
> - move module_platform_driver after clock driver

Looks good to me, just a few minor comments.

It is too late of this cycle. Please check the comments and re-send on
the next -rc1

>
> Changes v4 since v3 at [3]:
> - drop amlogic_t7_pll_probe, use meson_clkc_mmio_probe instead
> - add CLK_DIVIDER_MAX_AT_ZERO for pcie_pll_od clk
> - add frac for hifi_dco_pll_dco
> - add l_detect for mclk_pll_dco
> - drop v3 5/6 patch, and use MESON_PCLK
> - drop SPI_PWM_CLK_XX macro and use MESON_COMP_XX
> - drop the register's prefix
>
> Changes v3 since v2 at [2]:
> - update T7 PLL YAML
> - add 't7_' prefix for t7 clock name and variable in t7-pll.c and t7-peripherals.c
> - correct v1 patch link
> - add new macro MESON_PCLK_V2
> - update the driver,header,yaml file license
>
> Changes v2 since v1 at [1]:
> - add CLK_MESON import
> - add const for clkc_regmap_config in PLL driver
> - fix eth_rmii_sel parent
> - update T7 PLL YAML file
>
> [1]: https://lore.kernel.org/all/20241231060047.2298871-1-jian.hu@amlogic.com
> [2]: https://lore.kernel.org/all/20250108094025.2664201-1-jian.hu@amlogic.com
> [3]: https://lore.kernel.org/all/20250509074825.1933254-1-jian.hu@amlogic.com
> [4]: https://lore.kernel.org/all/20251030094345.2571222-1-jian.hu@amlogic.com
> Jian Hu (5):
>   dt-bindings: clock: add Amlogic T7 PLL clock controller
>   dt-bindings: clock: add Amlogic T7 SCMI clock controller
>   dt-bindings: clock: add Amlogic T7 peripherals clock controller
>   clk: meson: t7: add support for the T7 SoC PLL clock
>   clk: meson: t7: add t7 clock peripherals controller driver
>
>  .../clock/amlogic,t7-peripherals-clkc.yaml    |  116 ++
>  .../bindings/clock/amlogic,t7-pll-clkc.yaml   |  114 ++
>  drivers/clk/meson/Kconfig                     |   27 +
>  drivers/clk/meson/Makefile                    |    2 +
>  drivers/clk/meson/t7-peripherals.c            | 1266 +++++++++++++++++
>  drivers/clk/meson/t7-pll.c                    | 1068 ++++++++++++++
>  .../clock/amlogic,t7-peripherals-clkc.h       |  228 +++
>  .../dt-bindings/clock/amlogic,t7-pll-clkc.h   |   56 +
>  include/dt-bindings/clock/amlogic,t7-scmi.h   |   47 +
>  9 files changed, 2924 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/amlogic,t7-peripherals-clkc.yaml
>  create mode 100644 Documentation/devicetree/bindings/clock/amlogic,t7-pll-clkc.yaml
>  create mode 100644 drivers/clk/meson/t7-peripherals.c
>  create mode 100644 drivers/clk/meson/t7-pll.c
>  create mode 100644 include/dt-bindings/clock/amlogic,t7-peripherals-clkc.h
>  create mode 100644 include/dt-bindings/clock/amlogic,t7-pll-clkc.h
>  create mode 100644 include/dt-bindings/clock/amlogic,t7-scmi.h

-- 
Jerome