/* * gpio-regulator.h * * Copyright 2011 Heiko Stuebner <heiko@sntech.de> * * based on fixed.h * * Copyright 2008 Wolfson Microelectronics PLC. * * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> * * Copyright (c) 2009 Nokia Corporation * Roger Quadros <ext-roger.quadros@nokia.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. */ #ifndef __REGULATOR_GPIO_H #define __REGULATOR_GPIO_H struct regulator_init_data; enum regulator_type; /** * struct gpio_regulator_state - state description * @value: microvolts or microamps * @gpios: bitfield of gpio target-states for the value * * This structure describes a supported setting of the regulator * and the necessary gpio-state to achieve it. * * The n-th bit in the bitfield describes the state of the n-th GPIO * from the gpios-array defined in gpio_regulator_config below. */ struct gpio_regulator_state { int value; int gpios; }; /** * struct gpio_regulator_config - config structure * @supply_name: Name of the regulator supply * @enable_gpio: GPIO to use for enable control * set to -EINVAL if not used * @enable_high: Polarity of enable GPIO * 1 = Active high, 0 = Active low * @enabled_at_boot: Whether regulator has been enabled at * boot or not. 1 = Yes, 0 = No * This is used to keep the regulator at * the default state * @startup_delay: Start-up time in microseconds * @gpios: Array containing the gpios needed to control * the setting of the regulator * @nr_gpios: Number of gpios * @states: Array of gpio_regulator_state entries describing * the gpio state for specific voltages * @nr_states: Number of states available * @regulator_type: either REGULATOR_CURRENT or REGULATOR_VOLTAGE * @init_data: regulator_init_data * * This structure contains gpio-voltage regulator configuration * information that must be passed by platform code to the * gpio-voltage regulator driver. */ struct gpio_regulator_config { const char *supply_name; int enable_gpio; unsigned enable_high:1; unsigned enabled_at_boot:1; unsigned startup_delay; struct gpio *gpios; int nr_gpios; struct gpio_regulator_state *states; int nr_states; enum regulator_type type; struct regulator_init_data *init_data; }; #endif
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