diff options
Diffstat (limited to 'drivers/input/keyboard/cros_ec_keyb.c')
| -rw-r--r-- | drivers/input/keyboard/cros_ec_keyb.c | 69 |
1 files changed, 24 insertions, 45 deletions
diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c index 489ddd37bd4e..81be6f781f0b 100644 --- a/drivers/input/keyboard/cros_ec_keyb.c +++ b/drivers/input/keyboard/cros_ec_keyb.c @@ -1,25 +1,15 @@ -/* - * 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> @@ -170,9 +160,6 @@ static void cros_ec_keyb_process(struct cros_ec_keyb *ckdev, int col, row; int new_state; int old_state; - int num_cols; - - num_cols = len; if (ckdev->ghost_filter && cros_ec_keyb_has_ghosting(ckdev, kb_state)) { /* @@ -242,19 +229,17 @@ static int cros_ec_keyb_work(struct notifier_block *nb, u32 val; unsigned int ev_type; + /* + * If not wake enabled, discard key state changes during + * suspend. Switches will be re-checked in + * cros_ec_keyb_resume() to be sure nothing is lost. + */ + if (queued_during_suspend && !device_may_wakeup(ckdev->dev)) + return NOTIFY_OK; + switch (ckdev->ec->event_data.event_type) { case EC_MKBP_EVENT_KEY_MATRIX: - if (device_may_wakeup(ckdev->dev)) { - pm_wakeup_event(ckdev->dev, 0); - } else { - /* - * If keyboard is not wake enabled, discard key state - * changes during suspend. Switches will be re-checked - * in cros_ec_keyb_resume() to be sure nothing is lost. - */ - if (queued_during_suspend) - return NOTIFY_OK; - } + pm_wakeup_event(ckdev->dev, 0); if (ckdev->ec->event_size != ckdev->cols) { dev_err(ckdev->dev, @@ -268,10 +253,7 @@ static int cros_ec_keyb_work(struct notifier_block *nb, break; case EC_MKBP_EVENT_SYSRQ: - if (device_may_wakeup(ckdev->dev)) - pm_wakeup_event(ckdev->dev, 0); - else if (queued_during_suspend) - return NOTIFY_OK; + pm_wakeup_event(ckdev->dev, 0); val = get_unaligned_le32(&ckdev->ec->event_data.data.sysrq); dev_dbg(ckdev->dev, "sysrq code from EC: %#x\n", val); @@ -280,10 +262,7 @@ static int cros_ec_keyb_work(struct notifier_block *nb, case EC_MKBP_EVENT_BUTTON: case EC_MKBP_EVENT_SWITCH: - if (device_may_wakeup(ckdev->dev)) - pm_wakeup_event(ckdev->dev, 0); - else if (queued_during_suspend) - return NOTIFY_OK; + pm_wakeup_event(ckdev->dev, 0); if (ckdev->ec->event_data.event_type == EC_MKBP_EVENT_BUTTON) { val = get_unaligned_le32( @@ -683,6 +662,6 @@ static struct platform_driver cros_ec_keyb_driver = { module_platform_driver(cros_ec_keyb_driver); -MODULE_LICENSE("GPL"); +MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("ChromeOS EC keyboard driver"); MODULE_ALIAS("platform:cros-ec-keyb"); |