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7ecb8358b9
This saves power. Signed-off-by: Randall Spangler <rspangler@chromium.org> BUG=chrome-os-partner:8798 TEST=manual Get a proto1 system modified with INA current sensor 1) From chroot: dut-control i2c_mux_en:on i2c_mux:rem dut-control pp3300_alw_mv pp3300_alw_ma 2) From EC console: pll (this should turn the PLL back on; it'll report clock frequency ~66MHz) 3) From chroot: dut-control i2c_mux_en:on i2c_mux:rem dut-control pp3300_alw_mv pp3300_alw_ma Current (ma) should be bigger than in step 1 Change-Id: I806953684c57fd60bf481acb01dddffe2f2ad0ed
27 lines
678 B
C
27 lines
678 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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/* Clocks and power management settings */
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#ifndef __CROS_EC_CLOCK_H
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#define __CROS_EC_CLOCK_H
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#include "common.h"
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/* Set the CPU clocks and PLLs. */
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int clock_init(void);
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/* Return the current clock frequency in Hz. */
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int clock_get_freq(void);
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/* Enable or disable the PLL. */
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int clock_enable_pll(int enable);
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/* Wait <cycles> system clock cycles. Simple busy waiting for before
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* clocks/timers are initialized. */
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void clock_wait_cycles(uint32_t cycles);
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#endif /* __CROS_EC_CLOCK_H */
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