The RZ/V2{M, MA} PWM Timer (PWM) is composed of 16 channels. Linux is only allowed access to channels 8 to 14 on RZ/V2M, while there is no restriction for RZ/V2MA. The RZ/V2{M, MA} PWM Timer (PWM) supports the following functions: * The PWM has 24-bit counters which operate at PWM_CLK (48 MHz). * The frequency division ratio for internal counter operation is selectable as PWM_CLK divided by 1, 16, 256, or 2048. * The period as well as the duty cycle is adjustable. * The low-level and high-level order of the PWM signals can be inverted. * The duty cycle of the PWM signal is selectable in the range from 0 to 100%. * The minimum resolution is 20.83 ns. * Three interrupt sources: Rising and falling edges of the PWM signal and clearing of the counter * Counter operation and the bus interface are asynchronous and both can operate independently of the magnitude relationship of the respective clock periods. v1->v2: * Updated commit description * Replaced pwm8_15_pclk->cperi_grpf * Added reset entry R9A09G011_PWM_GPF_PRESETN * Added Rb tag from Krzysztof for bindings and the keep the Rb tag as the below changes are trivial * Updated the description for APB clock * Added resets required property * Updated the example with resets property * Replaced devm_reset_control_get_optional_shared->devm_reset_control_get_shared * Added resets property in pwm nodes. Note: Hardware manual for this IP can be found here https://www.renesas.com/in/en/document/mah/rzv2m-users-manual-hardware?language=en Biju Das (5): clk: renesas: r9a09g011: Add PWM clock and reset entries dt-bindings: pwm: Add RZ/V2M PWM binding pwm: Add support for RZ/V2M PWM driver arm64: dts: renesas: r9a09g011: Add pwm nodes arm64: dts: renesas: rzv2m evk: Enable pwm .../bindings/pwm/renesas,rzv2m-pwm.yaml | 90 ++++ .../boot/dts/renesas/r9a09g011-v2mevk2.dts | 70 ++++ arch/arm64/boot/dts/renesas/r9a09g011.dtsi | 98 +++++ drivers/clk/renesas/r9a09g011-cpg.c | 10 + drivers/pwm/Kconfig | 11 + drivers/pwm/Makefile | 1 + drivers/pwm/pwm-rzv2m.c | 390 ++++++++++++++++++ 7 files changed, 670 insertions(+) create mode 100644 Documentation/devicetree/bindings/pwm/renesas,rzv2m-pwm.yaml create mode 100644 drivers/pwm/pwm-rzv2m.c -- 2.25.1