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committed 68b7587baab/* * Copyright Intel Corporation (C) 2014-2016. All Rights Reserved * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program. If not, see <http://www.gnu.org/licenses/>. * * GPIO driver for Altera Arria10 MAX5 System Resource Chip * * Adapted from gpio-tps65910.c *//** * struct altr_a10sr_gpio - Altera Max5 GPIO device private data structure * @gp: : instance of the gpio_chip * @regmap: the regmap from the parent device. */struct altr_a10sr_gpio { struct gpio_chip gp; struct regmap *regmap;};static int altr_a10sr_gpio_get(struct gpio_chip *chip, unsigned int offset){ struct altr_a10sr_gpio *gpio = gpiochip_get_data(chip); int ret, val; ret = regmap_read(gpio->regmap, ALTR_A10SR_PBDSW_REG, &val); if (ret < 0) return ret; return !!(val & BIT(offset - ALTR_A10SR_LED_VALID_SHIFT));}static void altr_a10sr_gpio_set(struct gpio_chip *chip, unsigned int offset, int value){ struct altr_a10sr_gpio *gpio = gpiochip_get_data(chip); regmap_update_bits(gpio->regmap, ALTR_A10SR_LED_REG, BIT(ALTR_A10SR_LED_VALID_SHIFT + offset), value ? BIT(ALTR_A10SR_LED_VALID_SHIFT + offset) : 0);}static int altr_a10sr_gpio_direction_input(struct gpio_chip *gc, unsigned int nr){ if (nr < (ALTR_A10SR_IN_VALID_RANGE_LO - ALTR_A10SR_LED_VALID_SHIFT)) return -EINVAL;