diff options
Diffstat (limited to 'drivers/platform/chrome/cros_ec_lpc.c')
-rw-r--r-- | drivers/platform/chrome/cros_ec_lpc.c | 34 |
1 files changed, 12 insertions, 22 deletions
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c index 14684a56e40f..c9c240fbe7c6 100644 --- a/drivers/platform/chrome/cros_ec_lpc.c +++ b/drivers/platform/chrome/cros_ec_lpc.c | |||
@@ -1,25 +1,15 @@ | |||
1 | /* | 1 | // SPDX-License-Identifier: GPL-2.0 |
2 | * cros_ec_lpc - LPC access to the Chrome OS Embedded Controller | 2 | // LPC interface for ChromeOS Embedded Controller |
3 | * | 3 | // |
4 | * Copyright (C) 2012-2015 Google, Inc | 4 | // Copyright (C) 2012-2015 Google, Inc |
5 | * | 5 | // |
6 | * This software is licensed under the terms of the GNU General Public | 6 | // This driver uses the ChromeOS EC byte-level message-based protocol for |
7 | * License version 2, as published by the Free Software Foundation, and | 7 | // communicating the keyboard state (which keys are pressed) from a keyboard EC |
8 | * may be copied, distributed, and modified under those terms. | 8 | // to the AP over some bus (such as i2c, lpc, spi). The EC does debouncing, |
9 | * | 9 | // but everything else (including deghosting) is done here. The main |
10 | * This program is distributed in the hope that it will be useful, | 10 | // motivation for this is to keep the EC firmware as simple as possible, since |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | 11 | // it cannot be easily upgraded and EC flash/IRAM space is relatively |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | 12 | // expensive. |
13 | * GNU General Public License for more details. | ||
14 | * | ||
15 | * This driver uses the Chrome OS EC byte-level message-based protocol for | ||
16 | * communicating the keyboard state (which keys are pressed) from a keyboard EC | ||
17 | * to the AP over some bus (such as i2c, lpc, spi). The EC does debouncing, | ||
18 | * but everything else (including deghosting) is done here. The main | ||
19 | * motivation for this is to keep the EC firmware as simple as possible, since | ||
20 | * it cannot be easily upgraded and EC flash/IRAM space is relatively | ||
21 | * expensive. | ||
22 | */ | ||
23 | 13 | ||
24 | #include <linux/acpi.h> | 14 | #include <linux/acpi.h> |
25 | #include <linux/dmi.h> | 15 | #include <linux/dmi.h> |