[RFC PATCH v2 00/11] clk: imx8mn: setup clocks from the device tree

[Dario Binacchi <dario.binacchi@amarulasolutions.com>]

The idea for this series was born back from Dublin (ELCE 2022) after
having attended the talk entitled "Updating and Modernizing Clock
Drivers" held by Chen-Yu Tsai and the availability of a board with
imx8mn SOC.

This series aims to setup all imx8mn's clocks from the device tree and
remove the legacy setup code with hardwired parameters.

I am well aware that the series lacks patches for the DT bindings. The
effort up to this point has been important and so I thought I'd ask for
feedback from the community before proceeding to implement them. If it
is positive I will add the DT binding patches starting from version 2.

The series has been tested on the BSH SystemMaster (SMM) S2 board:
https://www.apertis.org/reference_hardware/imx8mn_bsh_smm_s2pro_setup


Changes in v2:
- Fix compiler warnings reported by kernel test robot.

Dario Binacchi (11):
  clk: imx: add structure to extend register accesses
  clk: imx: add clk_hw based API imx_get_clk_hw_from_dt()
  clk: imx8mn: add gate driver
  clk: imx8mn: add mux driver
  clk: imx8mn: add divider driver
  clk: imx: pll14xx: add device tree support
  clk: imx: composite-8m: add device tree support
  clk: imx: gate2: add device tree support
  clk: imx: cpu: add device tree support
  arm64: dts: imx8mn: add dumy clock
  arm64: dts: imx8mn: add clocks description

 .../boot/dts/freescale/imx8mn-clocks.dtsi     | 1885 +++++++++++++++++
 arch/arm64/boot/dts/freescale/imx8mn.dtsi     |   51 +-
 drivers/clk/imx/Makefile                      |    3 +
 drivers/clk/imx/clk-composite-8m.c            |   84 +
 drivers/clk/imx/clk-cpu.c                     |   54 +
 drivers/clk/imx/clk-divider.c                 |  235 ++
 drivers/clk/imx/clk-gate.c                    |  156 ++
 drivers/clk/imx/clk-gate2.c                   |   86 +
 drivers/clk/imx/clk-imx8mn.c                  |  716 ++-----
 drivers/clk/imx/clk-mux.c                     |  258 +++
 drivers/clk/imx/clk-pll14xx.c                 |  220 +-
 drivers/clk/imx/clk.c                         |   21 +
 drivers/clk/imx/clk.h                         |   15 +
 13 files changed, 3177 insertions(+), 607 deletions(-)
 create mode 100644 arch/arm64/boot/dts/freescale/imx8mn-clocks.dtsi
 create mode 100644 drivers/clk/imx/clk-divider.c
 create mode 100644 drivers/clk/imx/clk-gate.c
 create mode 100644 drivers/clk/imx/clk-mux.c

-- 
2.32.0