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8f118e0167
Each device keeps track of the last known state. If device_set_state updates the device state to a new known state, then return true. Cr50 uses this returned value to check if the state has changed instead of calculating it itself. BUG=none BRANCH=none TEST=device detection still works Change-Id: I8afac178c2c731def6f4f62ff7023fe169ec1479 Signed-off-by: Mary Ruthven <mruthven@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/430970 Reviewed-by: Aaron Durbin <adurbin@chromium.org>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/* Copyright 2016 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "console.h"
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#include "device_state.h"
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#include "hooks.h"
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int device_get_state(enum device_type device)
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{
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return device_states[device].state;
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}
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int device_set_state(enum device_type device, enum device_state state)
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{
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device_states[device].state = state;
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if (state != DEVICE_STATE_UNKNOWN &&
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device_states[device].last_known_state != state) {
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device_states[device].last_known_state = state;
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return 1;
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}
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return 0;
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}
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static void check_device_state(void)
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{
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int i;
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for (i = 0; i < DEVICE_COUNT; i++)
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board_update_device_state(i);
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}
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DECLARE_HOOK(HOOK_SECOND, check_device_state, HOOK_PRIO_DEFAULT);
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static void print_state(const char *name, enum device_state state)
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{
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ccprintf("%-9s %s\n", name, state == DEVICE_STATE_ON ? "on" :
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state == DEVICE_STATE_OFF ? "off" : "unknown");
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}
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static int command_devices(int argc, char **argv)
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{
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int i;
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for (i = 0; i < DEVICE_COUNT; i++)
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print_state(device_states[i].name,
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device_states[i].state);
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return EC_SUCCESS;
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}
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DECLARE_SAFE_CONSOLE_COMMAND(devices, command_devices,
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"",
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"Get the device states");
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