linux-imx

/*

 * Driver for the Gemini pin controller

 *

 * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>

 *

 * This is a group-only pin controller.

 */

#include <linux/err.h>

#include <linux/init.h>

#include <linux/io.h>

#include <linux/mfd/syscon.h>

#include <linux/of.h>

#include <linux/pinctrl/machine.h>

#include <linux/pinctrl/pinctrl.h>

#include <linux/pinctrl/pinmux.h>

#include <linux/pinctrl/pinconf.h>

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

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/regmap.h>

​

#include "pinctrl-utils.h"

​

#define DRIVER_NAME "pinctrl-gemini"

​

/**

 * struct gemini_pin_conf - information about configuring a pin

 * @pin: the pin number

 * @reg: config register

 * @mask: the bits affecting the configuration of the pin

 */

struct gemini_pin_conf {

    unsigned int pin;

    u32 reg;

    u32 mask;

};

​

/**

 * struct gemini_pmx - state holder for the gemini pin controller

 * @dev: a pointer back to containing device

 * @virtbase: the offset to the controller in virtual memory

 * @map: regmap to access registers

 * @is_3512: whether the SoC/package is the 3512 variant

 * @is_3516: whether the SoC/package is the 3516 variant

 * @flash_pin: whether the flash pin (extended pins for parallel

 * flash) is set

 * @confs: pin config information

 * @nconfs: number of pin config information items

 */

struct gemini_pmx {

    struct device *dev;

    struct pinctrl_dev *pctl;

    struct regmap *map;

    bool is_3512;

    bool is_3516;

    bool flash_pin;

    const struct gemini_pin_conf *confs;

    unsigned int nconfs;

};

​

/**

 * struct gemini_pin_group - describes a Gemini pin group

 * @name: the name of this specific pin group