// SPDX-License-Identifier: GPL-2.0+ // // MXS GPIO support. (c) 2008 Daniel Mack <[email protected]> // Copyright 2008 Juergen Beisert, [email protected] // // Based on code from Freescale, // Copyright (C) 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. #include <linux/err.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/gpio/driver.h> #include <linux/module.h> #define MXS_SET … #define MXS_CLR … #define PINCTRL_DOUT(p) … #define PINCTRL_DIN(p) … #define PINCTRL_DOE(p) … #define PINCTRL_PIN2IRQ(p) … #define PINCTRL_IRQEN(p) … #define PINCTRL_IRQLEV(p) … #define PINCTRL_IRQPOL(p) … #define PINCTRL_IRQSTAT(p) … #define GPIO_INT_FALL_EDGE … #define GPIO_INT_LOW_LEV … #define GPIO_INT_RISE_EDGE … #define GPIO_INT_HIGH_LEV … #define GPIO_INT_LEV_MASK … #define GPIO_INT_POL_MASK … enum mxs_gpio_id { … }; struct mxs_gpio_port { … }; static inline int is_imx23_gpio(struct mxs_gpio_port *port) { … } /* Note: This driver assumes 32 GPIOs are handled in one register */ static int mxs_gpio_set_irq_type(struct irq_data *d, unsigned int type) { … } static void mxs_flip_edge(struct mxs_gpio_port *port, u32 gpio) { … } /* MXS has one interrupt *per* gpio port */ static void mxs_gpio_irq_handler(struct irq_desc *desc) { … } /* * Set interrupt number "irq" in the GPIO as a wake-up source. * While system is running, all registered GPIO interrupts need to have * wake-up enabled. When system is suspended, only selected GPIO interrupts * need to have wake-up enabled. * @param irq interrupt source number * @param enable enable as wake-up if equal to non-zero * @return This function returns 0 on success. */ static int mxs_gpio_set_wake_irq(struct irq_data *d, unsigned int enable) { … } static int mxs_gpio_init_gc(struct mxs_gpio_port *port, int irq_base) { … } static int mxs_gpio_to_irq(struct gpio_chip *gc, unsigned int offset) { … } static int mxs_gpio_get_direction(struct gpio_chip *gc, unsigned int offset) { … } static const struct of_device_id mxs_gpio_dt_ids[] = …; MODULE_DEVICE_TABLE(of, mxs_gpio_dt_ids); static int mxs_gpio_probe(struct platform_device *pdev) { … } static struct platform_driver mxs_gpio_driver = …; static int __init mxs_gpio_init(void) { … } postcore_initcall(mxs_gpio_init); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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