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SC200L默认的PowerKey连接方式

根据原理图可知，低电有效，查询代码，默认低电6S以上触发开机或关机菜单

由于项目硬件设计，需改为高电平启动，低电平时无需手动确认，直接关机。因此需修改uboot（改开机）和framework（改关机）

开机修改

查看开机uboot log

发现开机按键相关log，查找到对应代码位置
SC200L\BSP\bootloader\u-boot15\drivers\misc\check_reboot.c

int power_button_pressed(void)
{
	int eic_value,ret;
//maybe get button status from eic API is batter
	sprd_eic_request(EIC_PBINT);
	udelay(3000);
	eic_value = sprd_eic_get(EIC_PBINT);
	debugf("power_button_pressed status %x\n", eic_value);

#ifdef CONFIG_POWERKEY_DEFAULT_HIGH
	if (eic_value == 0)
		ret = KEY_PRESSED;
	else
		ret = KEY_NOT_PRESSED;
#else
	if (eic_value == 0)
		ret = KEY_NOT_PRESSED;
	else
		ret = KEY_PRESSED;
#endif
	return ret;
}

由代码可知，关键部分在宏CONFIG_POWERKEY_DEFAULT_HIGH
在SC200L\BSP\bootloader\u-boot15\include\configs\sl8541e_1h10.h中注释掉宏定义即可

关机修改

关机参照 DeepCoder【 Android 10 系统启动 】系列 -- ShutdownThread（关机流程）

直接修改powerLongPress()函数即可
// frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java

private void powerLongPress() {
        final int behavior = getResolvedLongPressOnPowerBehavior();
        switch (behavior) {
            case LONG_PRESS_POWER_NOTHING:
                break;
            case LONG_PRESS_POWER_GLOBAL_ACTIONS:
                mPowerKeyHandled = true;
                performHapticFeedback(HapticFeedbackConstants.LONG_PRESS, false,
                        "Power - Long Press - Global Actions");
                //showGlobalActionsInternal();
				//上方代码为原处理方式（换出菜单）下方代码为直接关机代码
                sendCloseSystemWindows(SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS);
                mWindowManagerFuncs.shutdown(false);
                break;
            case LONG_PRESS_POWER_SHUT_OFF:
            case LONG_PRESS_POWER_SHUT_OFF_NO_CONFIRM:
                mPowerKeyHandled = true;
                performHapticFeedback(HapticFeedbackConstants.LONG_PRESS, false,
                        "Power - Long Press - Shut Off");
                sendCloseSystemWindows(SYSTEM_DIALOG_REASON_GLOBAL_ACTIONS);
                mWindowManagerFuncs.shutdown(behavior == LONG_PRESS_POWER_SHUT_OFF);
                break;
            case LONG_PRESS_POWER_GO_TO_VOICE_ASSIST:
                mPowerKeyHandled = true;
                performHapticFeedback(HapticFeedbackConstants.LONG_PRESS, false,
                        "Power - Long Press - Go To Voice Assist");
                // Some devices allow the voice assistant intent during setup (and use that intent
                // to launch something else, like Settings). So we explicitly allow that via the
                // config_allowStartActivityForLongPressOnPowerInSetup resource in config.xml.
                launchVoiceAssist(mAllowStartActivityForLongPressOnPowerDuringSetup);
                break;
            case LONG_PRESS_POWER_ASSISTANT:
                mPowerKeyHandled = true;
                performHapticFeedback(HapticFeedbackConstants.LONG_PRESS, false,
                        "Power - Long Press - Go To Assistant");
                final int powerKeyDeviceId = Integer.MIN_VALUE;
                launchAssistAction(null, powerKeyDeviceId);
                break;
        }
    }

重新编译烧录，满足需求。至此修改完成。