linux-imx

/*

 * mt65xx pinctrl driver based on Allwinner A1X pinctrl driver.

 * Copyright (c) 2014 MediaTek Inc.

 * Author: Hongzhou.Yang <hongzhou.yang@mediatek.com>

 *

 * This program is free software; you can redistribute 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 that 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/io.h>

#include <linux/gpio/driver.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/of_device.h>

#include <linux/of_irq.h>

#include <linux/pinctrl/consumer.h>

#include <linux/pinctrl/machine.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/bitops.h>

#include <linux/regmap.h>

#include <linux/mfd/syscon.h>

#include <linux/delay.h>

#include <linux/interrupt.h>

#include <linux/pm.h>

#include <dt-bindings/pinctrl/mt65xx.h>

​

#include "../core.h"

#include "../pinconf.h"

#include "../pinctrl-utils.h"

#include "mtk-eint.h"

#include "pinctrl-mtk-common.h"

​

#define MAX_GPIO_MODE_PER_REG 5

#define GPIO_MODE_BITS        3

#define GPIO_MODE_PREFIX "GPIO"

​

static const char * const mtk_gpio_functions[] = {

    "func0", "func1", "func2", "func3",

    "func4", "func5", "func6", "func7",

    "func8", "func9", "func10", "func11",

    "func12", "func13", "func14", "func15",

};

​

/*

 * There are two base address for pull related configuration

 * in mt8135, and different GPIO pins use different base address.

 * When pin number greater than type1_start and less than type1_end,

 * should use the second base address.

 */

static struct regmap *mtk_get_regmap(struct mtk_pinctrl *pctl,

        unsigned long pin)

{

    if (pin >= pctl->devdata->type1_start && pin < pctl->devdata->type1_end)

        return pctl->regmap2;

    return pctl->regmap1;

}

​

static unsigned int mtk_get_port(struct mtk_pinctrl *pctl, unsigned long pin)

{

    /* Different SoC has different mask and port shift. */

    return ((pin >> 4) & pctl->devdata->port_mask)

            << pctl->devdata->port_shf;

}

​

static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,

            struct pinctrl_gpio_range *range, unsigned offset,

            bool input)

{

    unsigned int reg_addr;

    unsigned int bit;

    struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);

​

    reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;

    bit = BIT(offset & 0xf);

​

    if (pctl->devdata->spec_dir_set)

        pctl->devdata->spec_dir_set(&reg_addr, offset);

​

    if (input)

        /* Different SoC has different alignment offset. */

        reg_addr = CLR_ADDR(reg_addr, pctl);