linux-imx

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

/*

 * drivers/hwmon/applesmc.c - driver for Apple's SMC (accelerometer, temperature

 * sensors, fan control, keyboard backlight control) used in Intel-based Apple

 * computers.

 *

 * Copyright (C) 2007 Nicolas Boichat <nicolas@boichat.ch>

 * Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se>

 *

 * Based on hdaps.c driver:

 * Copyright (C) 2005 Robert Love <rml@novell.com>

 * Copyright (C) 2005 Jesper Juhl <jj@chaosbits.net>

 *

 * Fan control based on smcFanControl:

 * Copyright (C) 2006 Hendrik Holtmann <holtmann@mac.com>

 */

​

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#include <linux/delay.h>

#include <linux/platform_device.h>

#include <linux/input-polldev.h>

#include <linux/kernel.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/timer.h>

#include <linux/dmi.h>

#include <linux/mutex.h>

#include <linux/hwmon-sysfs.h>

#include <linux/io.h>

#include <linux/leds.h>

#include <linux/hwmon.h>

#include <linux/workqueue.h>

#include <linux/err.h>

​

/* data port used by Apple SMC */

#define APPLESMC_DATA_PORT  0x300

/* command/status port used by Apple SMC */

#define APPLESMC_CMD_PORT   0x304

​

#define APPLESMC_NR_PORTS   32 /* 0x300-0x31f */

​

#define APPLESMC_MAX_DATA_LENGTH 32

​

/* wait up to 128 ms for a status change. */

#define APPLESMC_MIN_WAIT   0x0010

#define APPLESMC_RETRY_WAIT 0x0100

#define APPLESMC_MAX_WAIT   0x20000

​

#define APPLESMC_READ_CMD   0x10

#define APPLESMC_WRITE_CMD  0x11

#define APPLESMC_GET_KEY_BY_INDEX_CMD   0x12

#define APPLESMC_GET_KEY_TYPE_CMD   0x13

​

#define KEY_COUNT_KEY       "#KEY" /* r-o ui32 */

​

#define LIGHT_SENSOR_LEFT_KEY   "ALV0" /* r-o {alv (6-10 bytes) */

#define LIGHT_SENSOR_RIGHT_KEY  "ALV1" /* r-o {alv (6-10 bytes) */

#define BACKLIGHT_KEY       "LKSB" /* w-o {lkb (2 bytes) */

​

#define CLAMSHELL_KEY       "MSLD" /* r-o ui8 (unused) */

​

#define MOTION_SENSOR_X_KEY "MO_X" /* r-o sp78 (2 bytes) */