背景：ST的PLC参考设计板对应的设备树源码位于：https://github.com/peyoot/ccmp25_dt/blob/scarthgap/ccmp25-plc.dts ，编码器设备树的部分只是按早期官方文档的一个示例修改，需要进一步修改并验证其可用性。 官方文档可能有更新，LPTIM见：https://wiki.st.com/stm32mpu/wiki/LPTIM_device_tree_configuration#On_STM32MP2_series ，而 TIM DEVICE见https://wiki.st.com/stm32mpu/wiki/TIM_device_tree_configuration#On_STM32MP2_series

当前的设计，以counter_DI_1_2为例

&timers1 {
	status = "okay";

	/* USER CODE BEGIN timers1 */
	/delete-property/dmas;
	/delete-property/dma-names;
	/* USER CODE END timers1 */

	
	counter_DI_1_2  {                                          /* remove pwm10,pwm11 and add this */
		pinctrl-names = "default", "sleep";
		pinctrl-0 = <&ccmp25_timers1_ch3_4_pins>;
		pinctrl-1 = <&ccmp25_timers1_ch3_4_sleep_pins>;
		status = "okay";
    };
    和
   <code>
   ccmp25_timers1_ch3_4_pins: ccmp25-timers1-ch3_4 {
		pins {
			pinmux = <STM32_PINMUX('D',  9,  AF8)>, /* TIM1_CH3_PWM */
			 <STM32_PINMUX('D',  8,  AF8)>; /* TIM1_CH4_PWM */
			bias-disable;
		};
	};

	ccmp25_timers1_ch3_4_sleep_pins: ccmp25-timers1-ch3_4_sleep {
		pins {
			pinmux = <STM32_PINMUX('D',  9, ANALOG)>, /* TIM1_CH3_PWM */
			 <STM32_PINMUX('D',  8, ANALOG)>; /* TIM1_CH4_PWM */
		};
	};
   

</code>