| # Copyright (c) 2025 Renesas Electronics Corporation |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| description: |
| Renesas PWM RX Controller. There are two PWM modes in RX, PWM mode 1 and PWM mode 2. |
| In this version, we only support PWM mode 1. |
| The PWM waveform is output from the MTIOCnA and MTIOCnC pins by coupling the TGRA |
| register to the TGRB register and the TGRC register to the TGRD register. |
| // +----------------+----------------+----------------+--------------------+ |
| // | Channel | Register | PWM Mode 1 | PWM Mode 2 | |
| // +----------------+----------------+----------------+--------------------+ |
| // | MTU0 | MTU0.TGRA | MTIOCOA | MTIOCOA | |
| // | | MTU0.TGRB | | MTIOCOB | |
| // | | MTU0.TGRC | MTIOCOC | MTIOCOC | |
| // | | MTU0.TGRD | | MTIOCOD | |
| // +----------------+----------------+----------------+--------------------+ |
| // | MTU1 | MTU1.TGRA | MTIOC1A | MTIOC1A | |
| // | | MTU1.TGRB | | MTIOC1B | |
| // +----------------+----------------+----------------+--------------------+ |
| // | MTU2 | MTU2.TGRA | MTIOC2A | MTIOC2A | |
| // | | MTU2.TGRB | | MTIOC2B | |
| // +----------------+----------------+----------------+--------------------+ |
| // | MTU3 | MTU3.TGRA | MTIOC3A | Setting prohibited| |
| // | | MTU3.TGRB | | | |
| // | | MTU3.TGRC | MTIOC3C | | |
| // | | MTU3.TGRD | | | |
| // +----------------+----------------+----------------+ + |
| // | MTU4 | MTU4.TGRA | MTIOC4A | | |
| // | | MTU4.TGRB | | | |
| // | | MTU4.TGRC | MTIOC4C | | |
| // | | MTU4.TGRD | | | |
| // +----------------+----------------+----------------+--------------------+ |
| |
| compatible: "renesas,rx-mtu-pwm" |
| |
| include: [pwm-controller.yaml, pinctrl-device.yaml, base.yaml] |
| |
| properties: |
| prescaler: |
| type: int |
| default: 0 |
| description: Valid values are in the range 0-7 but |
| specifically depend on the device (see RX user's manual). Common settings are 0-3 for |
| dividers PCKL/1, PCLK/4, PCLK/16 and PCLK/64. |
| |
| "#pwm-cells": |
| const: 3 |
| description: | |
| Number of items to expect in a PWM |
| - channel of the timer used for PWM |
| - period to set in ns |
| - flags : combination of standard flags like PWM_POLARITY_NORMAL |
| |
| pwm-cells: |
| - channel |
| - period |
| - flags |
