[PATCH v2 0/2] pwm: add driver for T-THEAD TH1520 SoC

[Jisheng Zhang]

T-HEAD SoCs such as the TH1520 contain a PWM controller used to
control the LCD backlight, fan and so on. Add the PWM driver support
for it.

Since the clk part isn't mainlined, so SoC dts(i) changes are not
included in this series. However, it can be tested by using fixed-clock.

since v1:
 - update commit msg and yaml filename to address Conor's comment
 - use devm_clk_get_enabled() and devm_pwmchip_add()
 - implement .get_state()
 - properly handle overflow
 - introduce thead_pwm_from_chip() inline function
 - document Limitations
 - address pm_runtime_get/put pingpong comment

Jisheng Zhang (2):
  dt-bindings: pwm: Add T-HEAD PWM controller
  pwm: add T-HEAD PWM driver

 .../bindings/pwm/thead,th1520-pwm.yaml        |  44 +++
 MAINTAINERS                                   |   1 +
 drivers/pwm/Kconfig                           |  11 +
 drivers/pwm/Makefile                          |   1 +
 drivers/pwm/pwm-thead.c                       | 274 ++++++++++++++++++
 5 files changed, 331 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pwm/thead,th1520-pwm.yaml
 create mode 100644 drivers/pwm/pwm-thead.c

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2.40.1