mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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41cde66516
The fans on samus have a recommended minimum duty cycle of 20% while running, but 30% in order to start. We've been using the EC's built-in fan controller for the start requirement, but it has a minimum fast-start duty cycle of 50%. It turns out that that speed is noticeably noisy. This change handles the startup with logic in the EC instead, so that the fan only tries to spin at 30% initially (or if it drops too much below the minimum turning speed). BUG=chrome-os-partner:33429 BRANCH=ToT,samus TEST=make buildall -j Boot the system, let it idle with the browser windows closed, the browse a bit, then idle. Listen for changes to the fans. Before, I could hear the fans kick in and out as the AP load changed. Now it's much quieter. Change-Id: Id35215520c064eb6843686ec8bb5f3618dac6cf6 Signed-off-by: Bill Richardson <wfrichar@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/227658 Reviewed-by: Randall Spangler <rspangler@chromium.org>
81 lines
1.3 KiB
C
81 lines
1.3 KiB
C
/* Copyright (c) 2013 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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/* Mocked fan implementation for tests */
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#include "fan.h"
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#include "util.h"
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const struct fan_t fans[] = {
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{.flags = FAN_USE_RPM_MODE,
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.rpm_min = 1000,
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.rpm_start = 1500,
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.rpm_max = 5000,
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.ch = 0,
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.pgood_gpio = -1,
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.enable_gpio = -1,
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},
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};
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BUILD_ASSERT(ARRAY_SIZE(fans) == CONFIG_FANS);
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static int mock_enabled;
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void fan_set_enabled(int ch, int enabled)
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{
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mock_enabled = enabled;
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}
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int fan_get_enabled(int ch)
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{
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return mock_enabled;
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}
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static int mock_percent;
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void fan_set_duty(int ch, int percent)
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{
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mock_percent = percent;
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}
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int fan_get_duty(int ch)
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{
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return mock_percent;
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}
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static int mock_rpm_mode;
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void fan_set_rpm_mode(int ch, int rpm_mode)
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{
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mock_rpm_mode = rpm_mode;
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}
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int fan_get_rpm_mode(int ch)
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{
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return mock_rpm_mode;
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}
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int mock_rpm;
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void fan_set_rpm_target(int ch, int rpm)
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{
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mock_rpm = rpm;
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}
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int fan_get_rpm_actual(int ch)
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{
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return mock_rpm;
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}
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int fan_get_rpm_target(int ch)
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{
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return mock_rpm;
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}
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enum fan_status fan_get_status(int ch)
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{
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return FAN_STATUS_LOCKED;
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}
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int fan_is_stalled(int ch)
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{
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return 0;
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}
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void fan_channel_setup(int ch, unsigned int flags)
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{
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/* nothing to do */
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}
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