linux-imx

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

/*

 * TQ-Systems PLD MFD core driver, based on vendor driver by

 * Vadim V.Vlasov <vvlasov@dev.rtsoft.ru>

 *

 * Copyright (c) 2015 TQ-Systems GmbH

 * Copyright (c) 2019 Andrew Lunn <andrew@lunn.ch>

 */

​

#include <linux/delay.h>

#include <linux/dmi.h>

#include <linux/i2c.h>

#include <linux/io.h>

#include <linux/mfd/core.h>

#include <linux/module.h>

#include <linux/platform_data/i2c-ocores.h>

#include <linux/platform_device.h>

​

#define TQMX86_IOBASE   0x160

#define TQMX86_IOSIZE   0x3f

#define TQMX86_IOBASE_I2C   0x1a0

#define TQMX86_IOSIZE_I2C   0xa

#define TQMX86_IOBASE_WATCHDOG  0x18b

#define TQMX86_IOSIZE_WATCHDOG  0x2

#define TQMX86_IOBASE_GPIO  0x18d

#define TQMX86_IOSIZE_GPIO  0x4

​

#define TQMX86_REG_BOARD_ID 0x20

#define TQMX86_REG_BOARD_ID_E38M    1

#define TQMX86_REG_BOARD_ID_50UC    2

#define TQMX86_REG_BOARD_ID_E38C    3

#define TQMX86_REG_BOARD_ID_60EB    4

#define TQMX86_REG_BOARD_ID_E39M    5

#define TQMX86_REG_BOARD_ID_E39C    6

#define TQMX86_REG_BOARD_ID_E39x    7

#define TQMX86_REG_BOARD_ID_70EB    8

#define TQMX86_REG_BOARD_ID_80UC    9

#define TQMX86_REG_BOARD_ID_90UC    10

#define TQMX86_REG_BOARD_REV    0x21

#define TQMX86_REG_IO_EXT_INT   0x26

#define TQMX86_REG_IO_EXT_INT_NONE      0

#define TQMX86_REG_IO_EXT_INT_7         1

#define TQMX86_REG_IO_EXT_INT_9         2

#define TQMX86_REG_IO_EXT_INT_12        3

#define TQMX86_REG_IO_EXT_INT_MASK      0x3

#define TQMX86_REG_IO_EXT_INT_GPIO_SHIFT    4

​

#define TQMX86_REG_I2C_DETECT   0x47

#define TQMX86_REG_I2C_DETECT_SOFT      0xa5

#define TQMX86_REG_I2C_INT_EN   0x49

​

static uint gpio_irq;

module_param(gpio_irq, uint, 0);

MODULE_PARM_DESC(gpio_irq, "GPIO IRQ number (7, 9, 12)");

​

static const struct resource tqmx_i2c_soft_resources[] = {

    DEFINE_RES_IO(TQMX86_IOBASE_I2C, TQMX86_IOSIZE_I2C),

};

​

static const struct resource tqmx_watchdog_resources[] = {

    DEFINE_RES_IO(TQMX86_IOBASE_WATCHDOG, TQMX86_IOSIZE_WATCHDOG),

};

​

/*

 * The IRQ resource must be first, since it is updated with the

 * configured IRQ in the probe function.

 */

static struct resource tqmx_gpio_resources[] = {

    DEFINE_RES_IRQ(0),

    DEFINE_RES_IO(TQMX86_IOBASE_GPIO, TQMX86_IOSIZE_GPIO),

};

​

static struct i2c_board_info tqmx86_i2c_devices[] = {

    {

        /* 4K EEPROM at 0x50 */

        I2C_BOARD_INFO("24c32", 0x50),

    },

};

​

static struct ocores_i2c_platform_data ocores_platfom_data = {

    .num_devices = ARRAY_SIZE(tqmx86_i2c_devices),

    .devices = tqmx86_i2c_devices,

};

​

static const struct mfd_cell tqmx86_i2c_soft_dev[] = {

    {

        .name = "ocores-i2c",

        .platform_data = &ocores_platfom_data,

        .pdata_size = sizeof(ocores_platfom_data),

        .resources = tqmx_i2c_soft_resources,

        .num_resources = ARRAY_SIZE(tqmx_i2c_soft_resources),

    },