/*
* Copyright (c) 2011 The Chromium OS Authors.
* Copyright (c) 2011, NVIDIA Corp. All rights reserved.
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * 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.
- *
- * This program is distributed in the hope that 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _ASM_GENERIC_GPIO_H_
* an error value of -1.
*/
+enum gpio_flags {
+ GPIOF_INPUT,
+ GPIOF_OUTPUT_INIT_LOW,
+ GPIOF_OUTPUT_INIT_HIGH,
+};
+
+struct gpio {
+ unsigned int gpio;
+ enum gpio_flags flags;
+ const char *label;
+};
+
/**
- * Request ownership of a GPIO.
+ * Request a gpio. This should be called before any of the other functions
+ * are used on this gpio.
*
- * @param gpio GPIO number
- * @param label Name given to the GPIO
+ * @param gp GPIO number
+ * @param label User label for this GPIO
* @return 0 if ok, -1 on error
*/
int gpio_request(unsigned gpio, const char *label);
*/
int gpio_set_value(unsigned gpio, int value);
+/**
+ * Request a GPIO and configure it
+ * @param gpios pointer to array of gpio defs
+ * @param count number of GPIOs to set up
+ */
+int gpio_request_one(unsigned gpio, enum gpio_flags flags, const char *label);
+
+/**
+ * Request a set of GPIOs and configure them
+ * @param gpios pointer to array of gpio defs
+ * @param count number of GPIOs to set up
+ */
+int gpio_request_array(const struct gpio *gpios, int count);
+
+/**
+ * Release a set of GPIOs
+ * @param gpios pointer to array of gpio defs
+ * @param count number of GPIOs to set up
+ */
+int gpio_free_array(const struct gpio *gpios, int count);
+
#endif /* _ASM_GENERIC_GPIO_H_ */