Input: cros_ec_keyb - switch to SPDX identifier

/*

 * ChromeOS EC keyboard driver

 *

 * Copyright (C) 2012 Google, Inc

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * 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.

 *

 * This driver uses the Chrome OS EC byte-level message-based protocol for

 * communicating the keyboard state (which keys are pressed) from a keyboard EC

 * to the AP over some bus (such as i2c, lpc, spi).  The EC does debouncing,

 * but everything else (including deghosting) is done here.  The main

 * motivation for this is to keep the EC firmware as simple as possible, since

 * it cannot be easily upgraded and EC flash/IRAM space is relatively

 * expensive.

 */

// SPDX-License-Identifier: GPL-2.0

// ChromeOS EC keyboard driver

//

// Copyright (C) 2012 Google, Inc.

//

// This driver uses the ChromeOS EC byte-level message-based protocol for

// communicating the keyboard state (which keys are pressed) from a keyboard EC

// to the AP over some bus (such as i2c, lpc, spi).  The EC does debouncing,

// but everything else (including deghosting) is done here.  The main

// motivation for this is to keep the EC firmware as simple as possible, since

// it cannot be easily upgraded and EC flash/IRAM space is relatively

// expensive.

#include <linux/module.h>

#include <linux/bitops.h>