blob: f94da36e34e7d393152c62ce6596732a41bb7d10 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Clocks and power management settings */
#ifndef __CROS_EC_CLOCK_H
#define __CROS_EC_CLOCK_H
#include "common.h"
/**
* Set the CPU clocks and PLLs.
*/
void clock_init(void);
/**
* Return the current clock frequency in Hz.
*/
int clock_get_freq(void);
/**
* Enable or disable the PLL.
*
* @param enable Enable PLL if non-zero; disable if zero.
* @param notify Notify other modules of the PLL change. This should
* be 1 unless you're briefly turning on the PLL to work
* around a chip errata at init time.
*/
void clock_enable_pll(int enable, int notify);
/**
* Wait for a number of clock cycles.
*
* Simple busy waiting for use before clocks/timers are initialized.
*
* @param cycles Number of cycles to wait.
*/
void clock_wait_cycles(uint32_t cycles);
/* Clock gate control modes for clock_enable_peripheral() */
#define CGC_MODE_RUN (1 << 0)
#define CGC_MODE_SLEEP (1 << 1)
#define CGC_MODE_DSLEEP (1 << 2)
#define CGC_MODE_ALL (CGC_MODE_RUN | CGC_MODE_SLEEP | CGC_MODE_DSLEEP)
/**
* Enable clock to peripheral by setting the CGC register pertaining
* to run, sleep, and/or deep sleep modes.
*
* @param offset Offset of the peripheral. See enum clock_gate_offsets.
* @param mask Bit mask of the bits within CGC reg to set.
* @param mode Which mode(s) to enable the clock for
*/
void clock_enable_peripheral(uint32_t offset, uint32_t mask, uint32_t mode);
/**
* Disable clock to peripheral by setting the CGC register pertaining
* to run, sleep, and/or deep sleep modes.
*
* @param offset Offset of the peripheral. See enum clock_gate_offsets.
* @param mask Bit mask of the bits within CGC reg to clear.
* @param mode Which mode(s) to enable the clock for
*/
void clock_disable_peripheral(uint32_t offset, uint32_t mask, uint32_t mode);
/**
* Notify the clock module that the UART for the console is in use.
*/
void clock_refresh_console_in_use(void);
#endif /* __CROS_EC_CLOCK_H */
|