linux-imx

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

/*

 * driver/mfd/asic3.c

 *

 * Compaq ASIC3 support.

 *

 * Copyright 2001 Compaq Computer Corporation.

 * Copyright 2004-2005 Phil Blundell

 * Copyright 2007-2008 OpenedHand Ltd.

 *

 * Authors: Phil Blundell <pb@handhelds.org>,

 *      Samuel Ortiz <sameo@openedhand.com>

 */

​

#include <linux/kernel.h>

#include <linux/delay.h>

#include <linux/irq.h>

#include <linux/gpio.h>

#include <linux/export.h>

#include <linux/io.h>

#include <linux/slab.h>

#include <linux/spinlock.h>

#include <linux/platform_device.h>

​

#include <linux/mfd/asic3.h>

#include <linux/mfd/core.h>

#include <linux/mfd/ds1wm.h>

#include <linux/mfd/tmio.h>

​

#include <linux/mmc/host.h>

​

enum {

    ASIC3_CLOCK_SPI,

    ASIC3_CLOCK_OWM,

    ASIC3_CLOCK_PWM0,

    ASIC3_CLOCK_PWM1,

    ASIC3_CLOCK_LED0,

    ASIC3_CLOCK_LED1,

    ASIC3_CLOCK_LED2,

    ASIC3_CLOCK_SD_HOST,

    ASIC3_CLOCK_SD_BUS,

    ASIC3_CLOCK_SMBUS,

    ASIC3_CLOCK_EX0,

    ASIC3_CLOCK_EX1,

};

​

struct asic3_clk {

    int enabled;

    unsigned int cdex;

    unsigned long rate;

};

​

#define INIT_CDEX(_name, _rate) \

    [ASIC3_CLOCK_##_name] = {       \

        .cdex = CLOCK_CDEX_##_name, \

        .rate = _rate,          \

    }

​

static struct asic3_clk asic3_clk_init[] __initdata = {

    INIT_CDEX(SPI, 0),

    INIT_CDEX(OWM, 5000000),

    INIT_CDEX(PWM0, 0),

    INIT_CDEX(PWM1, 0),

    INIT_CDEX(LED0, 0),

    INIT_CDEX(LED1, 0),

    INIT_CDEX(LED2, 0),

    INIT_CDEX(SD_HOST, 24576000),

    INIT_CDEX(SD_BUS, 12288000),

    INIT_CDEX(SMBUS, 0),

    INIT_CDEX(EX0, 32768),

    INIT_CDEX(EX1, 24576000),

};

​

struct asic3 {

    void __iomem *mapping;

    unsigned int bus_shift;

    unsigned int irq_nr;

    unsigned int irq_base;

    raw_spinlock_t lock;

    u16 irq_bothedge[4];

    struct gpio_chip gpio;

    struct device *dev;

    void __iomem *tmio_cnf;

​

    struct asic3_clk clocks[ARRAY_SIZE(asic3_clk_init)];

};

​

static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset);

​

void asic3_write_register(struct asic3 *asic, unsigned int reg, u32 value)

{

    iowrite16(value, asic->mapping +