1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2019 Disruptive Technologies Research AS 4 * Sven Schwermer <sven.svenschwermer@disruptive-technologies.com> 5 */ 6 7 #ifndef _REGULATOR_COMMON_H 8 #define _REGULATOR_COMMON_H 9 10 #include <asm/gpio.h> 11 12 struct regulator_common_plat { 13 struct gpio_desc gpio; /* GPIO for regulator enable control */ 14 unsigned int startup_delay_us; 15 unsigned int off_on_delay_us; 16 unsigned int enable_count; 17 }; 18 19 int regulator_common_of_to_plat(struct udevice *dev, 20 struct regulator_common_plat *plat, const 21 char *enable_gpio_name); 22 int regulator_common_get_enable(const struct udevice *dev, 23 struct regulator_common_plat *plat); 24 /* 25 * Enable or Disable a regulator 26 * 27 * This is a reentrant function and subsequent calls that enable will 28 * increase an internal counter, and disable calls will decrease the counter. 29 * The actual resource will be enabled when the counter gets to 1 coming from 0, 30 * and disabled when it reaches 0 coming from 1. 31 * 32 * @dev: regulator device 33 * @plat: Platform data 34 * @enable: bool indicating whether to enable or disable the regulator 35 * @return: 36 * 0 on Success 37 * -EBUSY if the regulator cannot be disabled because it's requested by 38 * another device 39 * -EALREADY if the regulator has already been enabled or has already been 40 * disabled 41 * -EACCES if there is no possibility to enable/disable the regulator 42 * -ve on different error situation 43 */ 44 int regulator_common_set_enable(const struct udevice *dev, 45 struct regulator_common_plat *plat, bool enable); 46 47 #endif /* _REGULATOR_COMMON_H */ 48