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[RFC,0/7] Add RZ/G2L MTU3 PWM driver

Message ID 20220929103043.1228235-1-biju.das.jz@bp.renesas.com
Headers show
Series Add RZ/G2L MTU3 PWM driver | expand

Message

Biju Das Sept. 29, 2022, 10:30 a.m. UTC 
Add support for RZ/G2L MTU3 PWM driver. The IP supports
following PWM modes

1) PWM mode 1
2) PWM mode 2
3) Reset-synchronized PWM mode
4) Complementary PWM mode 1 (transfer at crest)
5) Complementary PWM mode 2 (transfer at trough)
6) Complementary PWM mode 3 (transfer at crest and trough)

This patch adds basic pwm mode 1 support for RZ/G2L MTU3 driver
by creating separate logical channels for each IOs.

Current patch set is tested with PWM mode 1 on the MTU3 channel
that has 2 IO's.

Please share your valuable comments on this patch series.

This RFC patch series depend upon MFD driver[1]
[1] https://patchwork.kernel.org/project/linux-renesas-soc/patch/20220926132114.60396-4-biju.das.jz@bp.renesas.com/

Biju Das (7):
  dt-bindings: mfd: Document RZ/G2L MTU3a bindings
  dt-bindings: mfd: rzg2l-mtu3: Document RZ/G2L MTU3 counter
  dt-bindings: mfd: rz-mtu3: Document RZ/G2L MTU3 PWM
  pwm: Add support for RZ/G2L MTU3 PWM
  arm64: dts: renesas: r9a07g044: Add MTU3 PWM support
  arm64: dts: renesas: r9a07g054: Add MTU3 PWM support
  arm64: dts: renesas: rzg2l-smarc: [HACK] Enable MTU3 PWM channel 3 for
    PWM mode 1 testing

 .../bindings/mfd/renesas,rzg2l-mtu3.yaml      | 360 ++++++++++++++++
 arch/arm64/boot/dts/renesas/r9a07g044.dtsi    |  42 ++
 arch/arm64/boot/dts/renesas/r9a07g054.dtsi    |  42 ++
 .../boot/dts/renesas/rz-smarc-common.dtsi     |   2 +
 .../dts/renesas/rzg2l-smarc-pinfunction.dtsi  |  11 +
 arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi  |   5 +
 arch/arm64/boot/dts/renesas/rzg2lc-smarc.dtsi |  20 +
 drivers/pwm/Kconfig                           |  11 +
 drivers/pwm/Makefile                          |   1 +
 drivers/pwm/pwm-rz-mtu3.c                     | 384 ++++++++++++++++++
 10 files changed, 878 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/renesas,rzg2l-mtu3.yaml
 create mode 100644 drivers/pwm/pwm-rz-mtu3.c