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e9328ac4f6
Add nopll command to turn off the PLL, reducing the system clock to 16Mhz. Signed-off-by: Randall Spangler <rspangler@chromium.org> BUG=chrome-os-partner:8798 TEST=manual boot system press power button to boot x86 temps // should print all temperatures timerinfo timerinfo timerinfo // convince yourself this is counting up at about 1MHz nopll // this drops the system clock to 16MHz temps // should still print all temperatures timerinfo timerinfo timerinfo // should still be counting up at about 1MHz Change-Id: Ie29ceb17af348148bffadf63d60c1b731f4c3f6d
22 lines
661 B
C
22 lines
661 B
C
/* Copyright (c) 2012 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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/* Watchdog driver */
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#ifndef __CROS_EC_WATCHDOG_H
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#define __CROS_EC_WATCHDOG_H
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/* Initialize the watchdog. This will cause the CPU to reboot if it has been
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* more than 2 watchdog periods since watchdog_reload() has been called. */
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int watchdog_init(int period_ms);
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/* Reload the watchdog counter */
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void watchdog_reload(void);
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/* Notifies the module the system clock frequency has changed to <freq>. */
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void watchdog_clock_changed(int freq);
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#endif /* __CROS_EC_WATCHDOG_H */
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