linux-imx

// SPDX-License-Identifier: GPL-2.0+

//

// MXC GPIO support. (c) 2008 Daniel Mack <daniel@caiaq.de>

// Copyright 2008 Juergen Beisert, kernel@pengutronix.de

//

// Based on code from Freescale Semiconductor,

// Authors: Daniel Mack, Juergen Beisert.

// Copyright (C) 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved.

​

#include <linux/clk.h>

#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/irqchip/chained_irq.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/syscore_ops.h>

#include <linux/gpio/driver.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/bug.h>

​

enum mxc_gpio_hwtype {

    IMX1_GPIO,  /* runs on i.mx1 */

    IMX21_GPIO, /* runs on i.mx21 and i.mx27 */

    IMX31_GPIO, /* runs on i.mx31 */

    IMX35_GPIO, /* runs on all other i.mx */

};

​

/* device type dependent stuff */

struct mxc_gpio_hwdata {

    unsigned dr_reg;

    unsigned gdir_reg;

    unsigned psr_reg;

    unsigned icr1_reg;

    unsigned icr2_reg;

    unsigned imr_reg;

    unsigned isr_reg;

    int edge_sel_reg;

    unsigned low_level;

    unsigned high_level;

    unsigned rise_edge;

    unsigned fall_edge;

};

​

struct mxc_gpio_reg_saved {

    u32 icr1;

    u32 icr2;

    u32 imr;

    u32 gdir;

    u32 edge_sel;

    u32 dr;

};

​

struct mxc_gpio_port {

    struct list_head node;

    void __iomem *base;

    struct clk *clk;

    int irq;

    int irq_high;

    struct irq_domain *domain;

    struct gpio_chip gc;

    struct device *dev;

    u32 both_edges;

    struct mxc_gpio_reg_saved gpio_saved_reg;

    bool power_off;

};

​

static struct mxc_gpio_hwdata imx1_imx21_gpio_hwdata = {

    .dr_reg     = 0x1c,

    .gdir_reg   = 0x00,

    .psr_reg    = 0x24,

    .icr1_reg   = 0x28,

    .icr2_reg   = 0x2c,

    .imr_reg    = 0x30,

    .isr_reg    = 0x34,

    .edge_sel_reg   = -EINVAL,

    .low_level  = 0x03,

    .high_level = 0x02,

    .rise_edge  = 0x00,

    .fall_edge  = 0x01,

};

​

static struct mxc_gpio_hwdata imx31_gpio_hwdata = {

    .dr_reg     = 0x00,

    .gdir_reg   = 0x04,

    .psr_reg    = 0x08,

    .icr1_reg   = 0x0c,

    .icr2_reg   = 0x10,