晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
 * Userspace ABI for TPS6594 PMIC Pre-configurable Finite State Machine
 *
 * Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/
 */

#ifndef __TPS6594_PFSM_H
#define __TPS6594_PFSM_H

#include <linux/const.h>
#include <linux/ioctl.h>
#include <linux/types.h>

/**
 * struct pmic_state_opt - PMIC state options
 * @gpio_retention: if enabled, power rails associated with GPIO retention remain active
 * @ddr_retention: if enabled, power rails associated with DDR retention remain active
 * @mcu_only_startup_dest: if enabled, startup destination state is MCU_ONLY
 */
struct pmic_state_opt {
	__u8 gpio_retention;
	__u8 ddr_retention;
	__u8 mcu_only_startup_dest;
};

/* Commands */
#define PMIC_BASE			'P'

#define PMIC_GOTO_STANDBY		_IO(PMIC_BASE, 0)
#define PMIC_GOTO_LP_STANDBY		_IO(PMIC_BASE, 1)
#define PMIC_UPDATE_PGM			_IO(PMIC_BASE, 2)
#define PMIC_SET_ACTIVE_STATE		_IO(PMIC_BASE, 3)
#define PMIC_SET_MCU_ONLY_STATE		_IOW(PMIC_BASE, 4, struct pmic_state_opt)
#define PMIC_SET_RETENTION_STATE	_IOW(PMIC_BASE, 5, struct pmic_state_opt)

#endif /*  __TPS6594_PFSM_H */