[PATCH RFC v4 00/12] ZTE zx297520v3 clock bindings and driver

[Stefan Dösinger]

Hi,

I am sending version 4 of my zx297520v3 clock patch. The major change is 
using regmaps rather than raw mmio to access the clocks and moving reset 
handling into its own aux bus driver.

I think the list of clocks in my driver is fairly complete; It is 
certainly a lot better than what the downstream ZTE drivers have. I 
deduced a lot of it by trial and error. I am sure there are some clocks 
missing that will need to be added to the binding later. Afaiu adding 
clocks is not an issue, but removing or reordering them is an ABI break.

I expect Sashiko to find a lot of slopiness mistakes, so I kept the 
[RFC] tag for this submission.

Signed-off-by: Stefan Dösinger <stefandoesinger at gmail.com>
---
Changes in v4:
*) Use syscon and regmap instead of raw IO
*) Move reset to its own driver on the aux bus, but keep reset and clk 
in the same binding as it matches the way the hardware works
*) Go back to having matrixclk in its own device because syscon deals 
poorly with multi io reg devices. List all PLL outputs from topclk as 
inputs to matrixclk
*) Some more hardware research: Figure out the parents of the 4 possible
GPIO clock outputs and declare them in the driver. They are unused on 
the hardware I have, but they show that all PLLs can be used.

- Link to v3: https://lore.kernel.org/r/20260529-zx29clk-v3-0-c7fe54ea388f@gmail.com

Changes in v3:
Model top and matrix clocks as one device
Add PLL driver
Fixed a few issues found by Sashiko: register lock, some missing devm_, 
error handling

v2: Fix build issues introduced by checkpatch.pl fixes that I didn't 
spot earlier.

---
Stefan Dösinger (12):
      dt-bindings: clk: zte: Add zx297520v3 top clock and reset bindings
      dt-bindings: clk: zte: Add zx297520v3 matrix clock and reset bindings
      dt-bindings: clk: zte: Add zx297520v3 LSP clock and reset bindings
      clk: zte: Add Clock registration infrastructure.
      clk: zte: Add zx PLL support infrastructure
      clk: zte: Add regmap based clocks
      clk: zte: Introduce a driver for zx297520v3 top clocks
      clk: zte: Introduce a driver for zx297520v3 matrix clocks
      clk: zte: Introduce a driver for zx297520v3 LSP clocks
      reset: zte: Add a zx297520v3 reset driver
      ARM: dts: zte: Declare zx297520v3 clock device nodes
      ARM: dts: zte: Add a syscon-reboot for zx297520v3 boards

 .../bindings/clock/zte,zx297520v3-lspclk.yaml      | 130 ++++
 .../bindings/clock/zte,zx297520v3-matrixclk.yaml   | 180 +++++
 .../bindings/clock/zte,zx297520v3-topclk.yaml      |  70 ++
 MAINTAINERS                                        |   4 +
 arch/arm/boot/dts/zte/zx297520v3.dtsi              |  97 ++-
 drivers/clk/Kconfig                                |   1 +
 drivers/clk/Makefile                               |   1 +
 drivers/clk/zte/Kconfig                            |  28 +
 drivers/clk/zte/Makefile                           |   6 +
 drivers/clk/zte/clk-regmap.c                       | 247 +++++++
 drivers/clk/zte/clk-zx.c                           | 157 ++++
 drivers/clk/zte/clk-zx.h                           |  79 ++
 drivers/clk/zte/clk-zx297520v3.c                   | 795 +++++++++++++++++++++
 drivers/clk/zte/pll-zx.c                           | 477 +++++++++++++
 drivers/reset/Kconfig                              |  11 +
 drivers/reset/Makefile                             |   1 +
 drivers/reset/reset-zte-zx297520v3.c               | 224 ++++++
 include/dt-bindings/clock/zte,zx297520v3-clk.h     | 219 ++++++
 18 files changed, 2718 insertions(+), 9 deletions(-)
---
base-commit: c1ecb239fa3456529a32255359fc78b69eb9d847
change-id: 20260510-zx29clk-2e4d39e3128c

Best regards,
-- 
Stefan Dösinger <stefandoesinger at gmail.com>