[v3,0/8] Support spread spectrum clocking for i.MX8{M,N,P} PLLs

Message

Dario Binacchi Nov. 6, 2024, 8:57 a.m. UTC

The series adds support for spread spectrum clocking for i.MX8M{N,M,P}
PLLs (audio, video and DRAM). It has been tested for the video PLL on
boards using i.MX8MN and i.MX8MP.

Changes in v3:
- Patches 1/8 has been added in version 3. The dt-bindings have
  been moved from fsl,imx8m-anatop.yaml to imx8m-clock.yaml. The
  anatop device (fsl,imx8m-anatop.yaml) is indeed more or less a
  syscon, so it represents a memory area accessible by ccm
  (imx8m-clock.yaml) to setup the PLLs.
- Patches {3,5}/8 have been added in version 3.
- Patches {4,6,8}/8 use ccm device node instead of the anatop one.

Changes in v2:
- Add "allOf:" and place it after "required:" block, like in the
  example schema.
- Move the properties definition to the top-level.
- Drop unit types as requested by the "make dt_binding_check" command.

Dario Binacchi (8):
  dt-bindings: clock: imx8m-clock: support spread spectrum clocking
  clk: imx: pll14xx: support spread spectrum clock generation
  clk: imx: imx8mm: distinguish between ccm and anatop references
  clk: imx8mm: support spread spectrum clock generation
  clk: imx: imx8mn: distinguish between ccm and anatop references
  clk: imx8mn: support spread spectrum clock generation
  clk: imx8mp: don't lose the anatop device node
  clk: imx8mp: support spread spectrum clock generation

 .../bindings/clock/imx8m-clock.yaml           |  46 ++++++++
 drivers/clk/imx/clk-imx8mm.c                  |  99 +++++++++--------
 drivers/clk/imx/clk-imx8mn.c                  | 102 +++++++++---------
 drivers/clk/imx/clk-imx8mp-audiomix.c         |   2 +-
 drivers/clk/imx/clk-imx8mp.c                  |  21 ++--
 drivers/clk/imx/clk-pll14xx.c                 | 102 +++++++++++++++++-
 drivers/clk/imx/clk.h                         |  24 ++++-
 7 files changed, 289 insertions(+), 107 deletions(-)