[PATCH 0/9] pwm: Update PWM_PXA driver for SpacemiT K1

[Guodong Xu]

This patchset updates the PWM_PXA driver and related device tree
bindings to support the SpacemiT K1 SoC. The changes include
modifications to driver support, configuration options, and device tree
bindings, enabling PWM functionality on the SpacemiT K1 platform.

It has been verified on the Banana Pi BPI-F3 board using PWM14, which is
specified as a pwm-backlight. The related device tree nodes are set to
"disabled" in patch 7, as a reference for future use when the display
driver is upstreamed and can be enabled all-together.

It is built upon:
1) the clock controller driver that Haylen Chu
currently has sent out for review at v6:
  https://lore.kernel.org/lkml/20250401172434.6774-1-heylenay@4d2.org/
2) the reset controller driver that Alex Elder
currently has sent for review at v3:
https://lore.kernel.org/lkml/20250409211741.1171584-1-elder@riscstar.com/

It consists of the following patches:
Patch 1: Add optional resets property to PXA PWM bindings.
Patch 2: Add reset control support in the PXA PWM driver.
Patch 3: Add spacemit,k1-pwm compatible string to DT bindings.
Patch 4: Extend PXA PWM driver to support SpacemiT K1.
Patch 5: Add 20 PWM nodes for K1 in the device tree.
Patch 6: Add pinctrl settings for PWM0 to PWM19.
Patch 7: Add PWM14 backlight support for BPI-F3 board.
Patch 8: Add ARCH_SPACEMIT dependency to PWM_PXA Kconfig.
Patch 9: Enable PWM and PWM_PXA in riscv defconfig for SpacemiT K1.

                     - Guodong Xu

Guodong Xu (9):
  dt-bindings: pwm: marvell,pxa: add optional property resets
  pwm: pxa: add optional reset control
  dt-bindings: pwm: marvell,pxa: add support to spacemit K1
  pwm: pxa: add support for spacemit K1
  riscv: dts: spacemit: add PWM support for K1 SoC
  riscv: dts: spacemit: Add pinctrl configurations for PWM0-PWM19
  riscv: dts: spacemit: Add PWM14 backlight support for BPI-F3
  pwm: Kconfig: add depends on ARCH_SPACEMIT to PWM_PXA
  riscv: defconfig: Enable PWM support for SpacemiT K1 SoC

 .../bindings/pwm/marvell,pxa-pwm.yaml         |   4 +
 .../boot/dts/spacemit/k1-bananapi-f3.dts      |  32 ++
 arch/riscv/boot/dts/spacemit/k1-pinctrl.dtsi  | 315 ++++++++++++++++++
 arch/riscv/boot/dts/spacemit/k1.dtsi          | 180 ++++++++++
 arch/riscv/configs/defconfig                  |   2 +
 drivers/pwm/Kconfig                           |   2 +-
 drivers/pwm/pwm-pxa.c                         |  16 +-
 7 files changed, 546 insertions(+), 5 deletions(-)

-- 
2.43.0