linux-imx

/*

 * drivers/leds/leds-apu.c

 * Copyright (C) 2017 Alan Mizrahi, alan at mizrahi dot com dot ve

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 *

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the names of the copyright holders nor the names of its

 *    contributors may be used to endorse or promote products derived from

 *    this software without specific prior written permission.

 *

 * Alternatively, this software may be distributed under the terms of the

 * GNU General Public License ("GPL") version 2 as published by the Free

 * Software Foundation.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 */

​

#include <linux/dmi.h>

#include <linux/err.h>

#include <linux/init.h>

#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/leds.h>

#include <linux/module.h>

#include <linux/platform_device.h>

​

#define APU1_FCH_ACPI_MMIO_BASE 0xFED80000

#define APU1_FCH_GPIO_BASE      (APU1_FCH_ACPI_MMIO_BASE + 0x01BD)

#define APU1_LEDON              0x08

#define APU1_LEDOFF             0xC8

#define APU1_NUM_GPIO           3

#define APU1_IOSIZE             sizeof(u8)

​

#define APU2_FCH_ACPI_MMIO_BASE 0xFED80000

#define APU2_FCH_GPIO_BASE      (APU2_FCH_ACPI_MMIO_BASE + 0x1500)

#define APU2_GPIO_BIT_WRITE     22

#define APU2_APU2_NUM_GPIO      4

#define APU2_IOSIZE             sizeof(u32)

​

/* LED access parameters */

struct apu_param {

    void __iomem *addr; /* for ioread/iowrite */

};

​

/* LED private data */

struct apu_led_priv {

    struct led_classdev cdev;

    struct apu_param param;

};

#define cdev_to_priv(c) container_of(c, struct apu_led_priv, cdev)

​

/* LED profile */

struct apu_led_profile {

    const char *name;

    enum led_brightness brightness;

    unsigned long offset; /* for devm_ioremap */

};

​

/* Supported platform types */

enum apu_led_platform_types {

    APU1_LED_PLATFORM,

    APU2_LED_PLATFORM,

};

​

struct apu_led_pdata {

    struct platform_device *pdev;

    struct apu_led_priv *pled;

    const struct apu_led_profile *profile;

    enum apu_led_platform_types platform;

    int num_led_instances;

    int iosize; /* for devm_ioremap() */

    spinlock_t lock;

};

​

static struct apu_led_pdata *apu_led;

​