// SPDX-License-Identifier: GPL-2.0 /* * SAMA5D2 PIOBU GPIO controller * * Copyright (C) 2018 Microchip Technology Inc. and its subsidiaries * * Author: Andrei Stefanescu <[email protected]> * */ #include <linux/bits.h> #include <linux/gpio/driver.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regmap.h> #define PIOBU_NUM … #define PIOBU_REG_SIZE … /* * backup mode protection register for tamper detection * normal mode protection register for tamper detection * wakeup signal generation */ #define PIOBU_BMPR … #define PIOBU_NMPR … #define PIOBU_WKPR … #define PIOBU_BASE … #define PIOBU_DET_OFFSET … /* In the datasheet this bit is called OUTPUT */ #define PIOBU_DIRECTION … #define PIOBU_OUT … #define PIOBU_IN … #define PIOBU_SOD … #define PIOBU_PDS … #define PIOBU_HIGH … #define PIOBU_LOW … struct sama5d2_piobu { … }; /* * sama5d2_piobu_setup_pin() - prepares a pin for set_direction call * * Do not consider pin for tamper detection (normal and backup modes) * Do not consider pin as tamper wakeup interrupt source */ static int sama5d2_piobu_setup_pin(struct gpio_chip *chip, unsigned int pin) { … } /* * sama5d2_piobu_write_value() - writes value & mask at the pin's PIOBU register */ static int sama5d2_piobu_write_value(struct gpio_chip *chip, unsigned int pin, unsigned int mask, unsigned int value) { … } /* * sama5d2_piobu_read_value() - read the value with masking from the pin's PIOBU * register */ static int sama5d2_piobu_read_value(struct gpio_chip *chip, unsigned int pin, unsigned int mask) { … } /* * sama5d2_piobu_get_direction() - gpiochip get_direction */ static int sama5d2_piobu_get_direction(struct gpio_chip *chip, unsigned int pin) { … } /* * sama5d2_piobu_direction_input() - gpiochip direction_input */ static int sama5d2_piobu_direction_input(struct gpio_chip *chip, unsigned int pin) { … } /* * sama5d2_piobu_direction_output() - gpiochip direction_output */ static int sama5d2_piobu_direction_output(struct gpio_chip *chip, unsigned int pin, int value) { … } /* * sama5d2_piobu_get() - gpiochip get */ static int sama5d2_piobu_get(struct gpio_chip *chip, unsigned int pin) { … } /* * sama5d2_piobu_set() - gpiochip set */ static void sama5d2_piobu_set(struct gpio_chip *chip, unsigned int pin, int value) { … } static int sama5d2_piobu_probe(struct platform_device *pdev) { … } static const struct of_device_id sama5d2_piobu_ids[] = …; MODULE_DEVICE_TABLE(of, sama5d2_piobu_ids); static struct platform_driver sama5d2_piobu_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …;
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