linux-imx

/*

 * PIC32 pinctrl driver

 *

 * Joshua Henderson, <joshua.henderson@microchip.com>

 * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.

 *

 * This program is free software; you can distribute it and/or modify it

 * under the terms of the GNU General Public License (Version 2) as

 * published by the Free Software Foundation.

 *

 * This program is distributed in the hope 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.

 */

#include <linux/clk.h>

#include <linux/gpio/driver.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/irq.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/pinctrl/pinconf.h>

#include <linux/pinctrl/pinconf-generic.h>

#include <linux/pinctrl/pinctrl.h>

#include <linux/pinctrl/pinmux.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/spinlock.h>

​

#include <asm/mach-pic32/pic32.h>

​

#include "pinctrl-utils.h"

#include "pinctrl-pic32.h"

​

#define PINS_PER_BANK       16

​

#define PIC32_CNCON_EDGE    11

#define PIC32_CNCON_ON      15

​

#define PIN_CONFIG_MICROCHIP_DIGITAL    (PIN_CONFIG_END + 1)

#define PIN_CONFIG_MICROCHIP_ANALOG (PIN_CONFIG_END + 2)

​

static const struct pinconf_generic_params pic32_mpp_bindings[] = {

    {"microchip,digital",   PIN_CONFIG_MICROCHIP_DIGITAL,   0},

    {"microchip,analog",    PIN_CONFIG_MICROCHIP_ANALOG,    0},

};

​

#define GPIO_BANK_START(bank)       ((bank) * PINS_PER_BANK)

​

struct pic32_function {

    const char *name;

    const char * const *groups;

    unsigned int ngroups;

};

​

struct pic32_pin_group {

    const char *name;

    unsigned int pin;

    struct pic32_desc_function *functions;

};

​

struct pic32_desc_function {

    const char *name;

    u32 muxreg;

    u32 muxval;

};

​

struct pic32_gpio_bank {

    void __iomem *reg_base;

    struct gpio_chip gpio_chip;

    struct irq_chip irq_chip;

    struct clk *clk;

};

​

struct pic32_pinctrl {

    void __iomem *reg_base;

    struct device *dev;

    struct pinctrl_dev *pctldev;

    const struct pinctrl_pin_desc *pins;

    unsigned int npins;

    const struct pic32_function *functions;

    unsigned int nfunctions;

    const struct pic32_pin_group *groups;

    unsigned int ngroups;

    struct pic32_gpio_bank *gpio_banks;

    unsigned int nbanks;

    struct clk *clk;

};

​

static const struct pinctrl_pin_desc pic32_pins[] = {

    PINCTRL_PIN(0, "A0"),