The Sophgo CV1800 chip provides a set of four independent PWM channel outputs. This series adds PWM controller support for Sophgo cv1800. Changes since v5: - delete the OE function because we plan to use the counter subsystem instead of capture, so there is no need to reuse this code. - fix set polarity reverse error. v5: https://lore.kernel.org/all/20240314100131.323540-1-qiujingbao.dlmu@xxxxxxxxx/ Changes since v4: - drop filename - fix macro - optimize cv1800_pwm_set_polarity() - optimize cv1800_pwm_set_oe() - add comment for cv1800_pwm_set_oe() - use ticks replace tem - fix duty_cycle larger than period_val - use devm_clk_rate_exclusive_get() replace clk_rate_exclusive_get() - map linux polarity to register polarity v4: https://lore.kernel.org/all/20240304085933.1246964-1-qiujingbao.dlmu@xxxxxxxxx/ datasheet Link: https://github.com/milkv-duo/duo-files/blob/main/duo/datasheet/CV1800B-CV1801B-Preliminary-Datasheet-full-en.pdf page 614 Changes since v3: - use macro instead of npwm number - add support for polarity feature - add support for Output-Enable/OE feature v3: https://lore.kernel.org/all/20240223082014.109385-1-qiujingbao.dlmu@xxxxxxxxx/ Changes since v2: - use 0x08 instead of macro - split if statements based on conditions - in order to round up, first calculate the number of high-level cycles, then subtract it from the PERIOD to obtain the number of HLPERIOD - use new pwmchip_alloc() API instead of old style v2: https://lore.kernel.org/all/20240212121729.1086718-1-qiujingbao.dlmu@xxxxxxxxx/ Changes since v1: - drop full stop from subject - re-order maintainers and description - pass checkpatch.pl --strict - fix naming errors - add "Limitations" section - use a driver specific prefix for all defines - using bool instead u32 in cv1800_pwm_enable - check and set state->polarity - use mul_u64_u64_div_u64 - use clk_rate_exclusive_get(), balance with clk_rate_exclusive_put() - using macro definitions instead of shift operations - remove shift operation on 0 - use priv replace cv_pwm - hardcode npwm - set atomic to true - remove MODULE_ALIAS v1: https://lore.kernel.org/all/20240207055856.672184-1-qiujingbao.dlmu@xxxxxxxxx/ Jingbao Qiu (2): dt-bindings: pwm: sophgo: add pwm for Sophgo CV1800 series SoC pwm: sophgo: add pwm support for Sophgo CV1800 SoC .../bindings/pwm/sophgo,cv1800-pwm.yaml | 45 +++ drivers/pwm/Kconfig | 10 + drivers/pwm/Makefile | 1 + drivers/pwm/pwm-cv1800.c | 296 ++++++++++++++++++ 4 files changed, 352 insertions(+) create mode 100644 Documentation/devicetree/bindings/pwm/sophgo,cv1800-pwm.yaml create mode 100644 drivers/pwm/pwm-cv1800.c -- 2.25.1
