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https://github.com/zmkfirmware/zmk.git
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adb3a13dc5
Initial work on a soft on/off support for ZMK. Triggering soft off puts the device into deep sleep with only a specific GPIO pin configured to wake the device, avoiding waking from other key presses in the matrix like the normal deep sleep. Co-authored-by: Cem Aksoylar <caksoylar@users.noreply.github.com>
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/*
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* Copyright (c) 2023 The ZMK Contributors
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*
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* SPDX-License-Identifier: MIT
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*/
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/devicetree.h>
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#include <zephyr/init.h>
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#include <zephyr/pm/device.h>
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#include <zephyr/pm/pm.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
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#define HAS_WAKERS DT_HAS_COMPAT_STATUS_OKAY(zmk_soft_off_wakeup_sources)
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#if HAS_WAKERS
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#define DEVICE_WITH_SEP(node_id, prop, idx) DEVICE_DT_GET(DT_PROP_BY_IDX(node_id, prop, idx)),
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const struct device *soft_off_wakeup_sources[] = {
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DT_FOREACH_PROP_ELEM(DT_INST(0, zmk_soft_off_wakeup_sources), wakeup_sources, DEVICE_WITH_SEP)};
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#endif
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int zmk_pm_soft_off(void) {
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#if IS_ENABLED(CONFIG_PM_DEVICE)
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size_t device_count;
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const struct device *devs;
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device_count = z_device_get_all_static(&devs);
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// There may be some matrix/direct kscan devices that would be used for wakeup
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// from normal "inactive goes to sleep" behavior, so disable them as wakeup devices
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// and then suspend them so we're ready to take over setting up our system
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// and then putting it into an off state.
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for (int i = 0; i < device_count; i++) {
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const struct device *dev = &devs[i];
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LOG_DBG("soft-on-off pressed cb: suspend device");
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if (pm_device_wakeup_is_enabled(dev)) {
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pm_device_wakeup_enable(dev, false);
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}
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pm_device_action_run(dev, PM_DEVICE_ACTION_SUSPEND);
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}
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#endif // IS_ENABLED(CONFIG_PM_DEVICE)
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#if HAS_WAKERS
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for (int i = 0; i < ARRAY_SIZE(soft_off_wakeup_sources); i++) {
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const struct device *dev = soft_off_wakeup_sources[i];
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pm_device_wakeup_enable(dev, true);
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pm_device_action_run(dev, PM_DEVICE_ACTION_RESUME);
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}
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#endif // HAS_WAKERS
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LOG_DBG("soft-on-off interrupt: go to sleep");
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return pm_state_force(0U, &(struct pm_state_info){PM_STATE_SOFT_OFF, 0, 0});
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}
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