linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.

 */

#include <linux/gpio/driver.h>

#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/pci.h>

#include <linux/slab.h>

​

#define PCH_EDGE_FALLING    0

#define PCH_EDGE_RISING     BIT(0)

#define PCH_LEVEL_L     BIT(1)

#define PCH_LEVEL_H     (BIT(0) | BIT(1))

#define PCH_EDGE_BOTH       BIT(2)

#define PCH_IM_MASK     (BIT(0) | BIT(1) | BIT(2))

​

#define PCH_IRQ_BASE        24

​

struct pch_regs {

    u32 ien;

    u32 istatus;

    u32 idisp;

    u32 iclr;

    u32 imask;

    u32 imaskclr;

    u32 po;

    u32 pi;

    u32 pm;

    u32 im0;

    u32 im1;

    u32 reserved[3];

    u32 gpio_use_sel;

    u32 reset;

};

​

enum pch_type_t {

    INTEL_EG20T_PCH,

    OKISEMI_ML7223m_IOH, /* LAPIS Semiconductor ML7223 IOH PCIe Bus-m */

    OKISEMI_ML7223n_IOH  /* LAPIS Semiconductor ML7223 IOH PCIe Bus-n */

};

​

/* Specifies number of GPIO PINS */

static int gpio_pins[] = {

    [INTEL_EG20T_PCH] = 12,

    [OKISEMI_ML7223m_IOH] = 8,

    [OKISEMI_ML7223n_IOH] = 8,

};

​

/**

 * struct pch_gpio_reg_data - The register store data.

 * @ien_reg:    To store contents of IEN register.

 * @imask_reg:  To store contents of IMASK register.

 * @po_reg: To store contents of PO register.

 * @pm_reg: To store contents of PM register.

 * @im0_reg:    To store contents of IM0 register.

 * @im1_reg:    To store contents of IM1 register.

 * @gpio_use_sel_reg : To store contents of GPIO_USE_SEL register.

 *             (Only ML7223 Bus-n)

 */

struct pch_gpio_reg_data {

    u32 ien_reg;

    u32 imask_reg;

    u32 po_reg;

    u32 pm_reg;

    u32 im0_reg;

    u32 im1_reg;

    u32 gpio_use_sel_reg;

};

​

/**

 * struct pch_gpio - GPIO private data structure.

 * @base:           PCI base address of Memory mapped I/O register.

 * @reg:            Memory mapped PCH GPIO register list.

 * @dev:            Pointer to device structure.

 * @gpio:           Data for GPIO infrastructure.

 * @pch_gpio_reg:       Memory mapped Register data is saved here

 *              when suspend.

 * @lock:           Used for register access protection

 * @irq_base:       Save base of IRQ number for interrupt

 * @ioh:        IOH ID

 * @spinlock:       Used for register access protection

 */

struct pch_gpio {

    void __iomem *base;

    struct pch_regs __iomem *reg;

    struct device *dev;

    struct gpio_chip gpio;

    struct pch_gpio_reg_data pch_gpio_reg;

    int irq_base;