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[v3,0/5] Support clock and reset unit of Rockchip RK3528

Message ID 20250217061142.38480-5-ziyao@disroot.org (mailing list archive)
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Series Support clock and reset unit of Rockchip RK3528 | expand

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Yao Zi Feb. 17, 2025, 6:11 a.m. UTC 
Similar to previous Rockchip SoCs, reset controller on RK3528 shares
MMIO region with clock controller, combined as CRU. They're represented
as a single node in dt.

For the reset controller, only bindings are included in this series
because it's hard to test the reset controller without support for some
peripherals (e.g. pinctrl). I'd like to first make dt and basic
peripherals available, then submit the driver.

This is tested on Radxa E20C board. With some out-of-tree drivers, I've
successfully brouhgt up UART, pinctrl/gpio and I2C. A clock dump could
be obtained from [1].

[1]: https://gist.github.com/ziyao233/032961d1eebeecb9a41fea2d690e8351

Changed from v2
- dt-bindings:
  - drop redundant assigned-clocks and assigned-clock-rates properties
  - improve description of input clock gmac0
- Link to v2: https://lore.kernel.org/all/20250108114605.1960-2-ziyao@disroot.org/

Changed from v1
- dt-bindings:
  - relicense binding headers as GPL-2.0-only OR MIT
  - use gapless integers starting from 0 for binding IDs
  - make input clocks essential, add corresponding description
  - rename the input clock that is generated by phy module as "gmac0"
  - style fixes
- driver:
  - format in the common Rockchip driver style
  - drop initializing code of the reset controller, as it'll not be
    supported in this series
- Link to v1: https://lore.kernel.org/linux-rockchip/20241001042401.31903-2-ziyao@disroot.org/

Yao Zi (5):
  dt-bindings: clock: Document clock and reset unit of RK3528
  clk: rockchip: Add PLL flag ROCKCHIP_PLL_FIXED_MODE
  clk: rockchip: Add clock controller driver for RK3528 SoC
  arm64: dts: rockchip: Add clock generators for RK3528 SoC
  arm64: dts: rockchip: Add UART clocks for RK3528 SoC

 .../bindings/clock/rockchip,rk3528-cru.yaml   |   64 +
 arch/arm64/boot/dts/rockchip/rk3528.dtsi      |   68 +-
 drivers/clk/rockchip/Kconfig                  |    7 +
 drivers/clk/rockchip/Makefile                 |    1 +
 drivers/clk/rockchip/clk-pll.c                |   10 +-
 drivers/clk/rockchip/clk-rk3528.c             | 1114 +++++++++++++++++
 drivers/clk/rockchip/clk.h                    |   22 +
 .../dt-bindings/clock/rockchip,rk3528-cru.h   |  453 +++++++
 .../dt-bindings/reset/rockchip,rk3528-cru.h   |  241 ++++
 9 files changed, 1975 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/clock/rockchip,rk3528-cru.yaml
 create mode 100644 drivers/clk/rockchip/clk-rk3528.c
 create mode 100644 include/dt-bindings/clock/rockchip,rk3528-cru.h
 create mode 100644 include/dt-bindings/reset/rockchip,rk3528-cru.h