[PATCH v5 0/2] Add driver support for ESWIN eic700 SoC clock controller

[dongxuyang@eswincomputing.com]

From: Xuyang Dong <dongxuyang@eswincomputing.com>

This series depends on config option patch [1].

[1] https://lore.kernel.org/all/20250825132427.1618089-3-pinkesh.vaghela@einfochips.com/

Updates:

  Changes in v5:
  - Removed vendor prefix patch dependency from cover letter, because the patch
    was applied.
  - Updated YAML file
    - Placed the required after all properties.
    - Removed patternProperties. Also removed compatible of eswin,pll-clock,
      eswin,mux-clock, eswin,divider-clock and eswin,gate-clock as we have moved
      clock tree from DTS to Linux driver.
    - Removed the clock tree from DTS. Used clock-controller to manage all
      clock. Removed all child nodes in clock-controller.
    - Removed '#address-cells' and '#size-cells' properties, because the clock
      controller did not need to define these properties.
    - Removed eic7700-clocks.dtsi.
    - Added dt-bindings header for clock IDs. Because used the IDs to register
      clocks.
  - Updated driver file
    - Modified the commit for clock driver. Dropped indentation in commit.
    - Removed CLK_OF_DECLARE(). Used *clk_hw_register* to register clocks. Used
      devm_of_clk_add_hw_provider.
    - Dropped singletons.
    - Checked the value right after obtaining it.
    - Removed the definitions of macro frequency in clk.h like CLK_FREQ_24M.
    - Modified description of help in Kconfig.
    - Added COMPILE_TEST. Added COMMON_CLK_ESWIN for clk.o. And added
      "select COMMON_CLK_ESWIN" for clk-eic7700.c. Without COMMON_CLK_EIC7700,
      clk.c could not be compiled.
    - Used .determined_rate.
    - Added macro definitions of EIC7700_DIV, EIC7700_FIXED, EIC7700_FACTOR,  
      EIC7700_MUX and EIC7700_PLL to manage clock tree.
    - Added clk-eic7700.h to place eic7700 SoC clock registers.
    - Removed refdiv_val and postdiv1_val from clk_pll_recalc_rate(). Because
      these values were unused.
  - Link to v4: https://lore.kernel.org/all/20250815093539.975-1-dongxuyang@eswincomputing.com/

  Changes in v4:
  - Updated YAML file
    - Changed name from cpu-default-frequency to cpu-default-freq-hz.
    - Dropped $ref of cpu-default-frequency.
    - Added cpu-default-frequency for required.
    - Removed cpu-default-frequency in updated file, because there was no
      need to add cpu-default-frequency.
    - Moved DIVIDER to DIV.
    - Arranged the IDs in order.
    - Dropped EIC7700_NR_CLKS.
    - Removed dt-bindings eswin,eic7700-clock.h. Because IDs was not used,
      and used clock device nodes.
    - According to the updated driver codes, the YAML has been updated.
  - Updated driver file
    - Remove undocumented parameters "cpu_no_boost_1_6ghz" and
      "cpu-default-frequency".
    - Modified the comment and used the correct Linux coding style.
    - Removed codes of voltage, because it was not the clock driver.
    - Updated the formula of clock frequency calculation. Removed the logic
      that only used register selection.
    - Used CLK_OF_DECLARE() to register clocks. Registered pll-clock,
      mux-clock, divider-clock, and gate-clock in clk-eic7700.c.
      The specific implementation of clock registration was in clk.c.
    - Added eic7700-clocks.dtsi.
    - Moved device information to DTS. Put all clocks' node in the
      eic7700-clocks.dtsi.
  - Link to v3: https://lore.kernel.org/all/20250624103212.287-1-dongxuyang@eswincomputing.com/

  Changes in v3:
  - Update example, drop child node and add '#clock-cells' to the parent
    node.
  - Change parent node from sys-crg to clock-controller for this yaml.
  - Drop "syscon", "simple-mfd" to clear warnings/errors by using "make
    dt_binding_check". And these are not necessary.
  - Add "cpu-default-frequency" definition in yaml for "undocumented ABI".
  - Drop Reviewed-by, this is misunderstanding. We have not received such
    an email.
  - Link to v2: https://lore.kernel.org/all/20250523090747.1830-1-dongxuyang@eswincomputing.com/

  Changes in v2:
  - Update example, drop child node.
  - Clear warnings/errors for using "make dt_binding_check".
  - Change to the correct format.
  - Drop some non-stanard code.
  - Use dev_err_probe() in probe functions.
  - Link to v1: https://lore.kernel.org/all/20250514002233.187-1-dongxuyang@eswincomputing.com/

Xuyang Dong (2):
  dt-bindings: clock: eswin: Documentation for eic7700 SoC
  clock: eswin: Add eic7700 clock driver

 .../bindings/clock/eswin,eic7700-clock.yaml   |   40 +
 drivers/clk/Kconfig                           |    1 +
 drivers/clk/Makefile                          |    1 +
 drivers/clk/eswin/Kconfig                     |   15 +
 drivers/clk/eswin/Makefile                    |    8 +
 drivers/clk/eswin/clk-eic7700.c               | 1042 +++++++++++++++++
 drivers/clk/eswin/clk-eic7700.h               |  122 ++
 drivers/clk/eswin/clk.c                       |  448 +++++++
 drivers/clk/eswin/clk.h                       |  242 ++++
 .../dt-bindings/clock/eswin,eic7700-clock.h   |  379 ++++++
 10 files changed, 2298 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/eswin,eic7700-clock.yaml
 create mode 100644 drivers/clk/eswin/Kconfig
 create mode 100644 drivers/clk/eswin/Makefile
 create mode 100644 drivers/clk/eswin/clk-eic7700.c
 create mode 100644 drivers/clk/eswin/clk-eic7700.h
 create mode 100644 drivers/clk/eswin/clk.c
 create mode 100644 drivers/clk/eswin/clk.h
 create mode 100644 include/dt-bindings/clock/eswin,eic7700-clock.h

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2.43.0