1/*
2 * OMAP2-specific DPLL control functions
3 *
4 * Copyright (C) 2011 Nokia Corporation
5 * Paul Walmsley
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/kernel.h>
13#include <linux/errno.h>
14#include <linux/clk.h>
15#include <linux/io.h>
16
17#include "clock.h"
18#include "cm2xxx.h"
19#include "cm-regbits-24xx.h"
20
21/* Private functions */
22
23/**
24 * _allow_idle - enable DPLL autoidle bits
25 * @clk: struct clk * of the DPLL to operate on
26 *
27 * Enable DPLL automatic idle control.  The DPLL will enter low-power
28 * stop when its downstream clocks are gated.  No return value.
29 * REVISIT: DPLL can optionally enter low-power bypass by writing 0x1
30 * instead.  Add some mechanism to optionally enter this mode.
31 */
32static void _allow_idle(struct clk_hw_omap *clk)
33{
34	if (!clk || !clk->dpll_data)
35		return;
36
37	omap2xxx_cm_set_dpll_auto_low_power_stop();
38}
39
40/**
41 * _deny_idle - prevent DPLL from automatically idling
42 * @clk: struct clk * of the DPLL to operate on
43 *
44 * Disable DPLL automatic idle control.  No return value.
45 */
46static void _deny_idle(struct clk_hw_omap *clk)
47{
48	if (!clk || !clk->dpll_data)
49		return;
50
51	omap2xxx_cm_set_dpll_disable_autoidle();
52}
53
54
55/* Public data */
56const struct clk_hw_omap_ops clkhwops_omap2xxx_dpll = {
57	.allow_idle	= _allow_idle,
58	.deny_idle	= _deny_idle,
59};
60