aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-omap2/clockdomain44xx.c
blob: 4f04dd11d65570b5cd1a22d7fa8faae90c1bb058 (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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
/*
 * OMAP4 clockdomain control
 *
 * Copyright (C) 2008-2010 Texas Instruments, Inc.
 * Copyright (C) 2008-2010 Nokia Corporation
 *
 * Derived from mach-omap2/clockdomain.c written by Paul Walmsley
 * Rajendra Nayak <rnayak@ti.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include "clockdomain.h"
#include "cminst44xx.h"
#include "cm44xx.h"

static int omap4_clkdm_add_wkup_sleep_dep(struct clockdomain *clkdm1,
					struct clockdomain *clkdm2)
{
	omap4_cminst_set_inst_reg_bits((1 << clkdm2->dep_bit),
					clkdm1->prcm_partition,
					clkdm1->cm_inst, clkdm1->clkdm_offs +
					OMAP4_CM_STATICDEP);
	return 0;
}

static int omap4_clkdm_del_wkup_sleep_dep(struct clockdomain *clkdm1,
					struct clockdomain *clkdm2)
{
	omap4_cminst_clear_inst_reg_bits((1 << clkdm2->dep_bit),
					clkdm1->prcm_partition,
					clkdm1->cm_inst, clkdm1->clkdm_offs +
					OMAP4_CM_STATICDEP);
	return 0;
}

static int omap4_clkdm_read_wkup_sleep_dep(struct clockdomain *clkdm1,
					struct clockdomain *clkdm2)
{
	return omap4_cminst_read_inst_reg_bits(clkdm1->prcm_partition,
					clkdm1->cm_inst, clkdm1->clkdm_offs +
					OMAP4_CM_STATICDEP,
					(1 << clkdm2->dep_bit));
}

static int omap4_clkdm_clear_all_wkup_sleep_deps(struct clockdomain *clkdm)
{
	struct clkdm_dep *cd;
	u32 mask = 0;

	if (!clkdm->prcm_partition)
		return 0;

	for (cd = clkdm->wkdep_srcs; cd && cd->clkdm_name; cd++) {
		if (!cd->clkdm)
			continue; /* only happens if data is erroneous */

		mask |= 1 << cd->clkdm->dep_bit;
		atomic_set(&cd->wkdep_usecount, 0);
	}

	omap4_cminst_clear_inst_reg_bits(mask, clkdm->prcm_partition,
					clkdm->cm_inst, clkdm->clkdm_offs +
					OMAP4_CM_STATICDEP);
	return 0;
}

static int omap4_clkdm_sleep(struct clockdomain *clkdm)
{
	omap4_cminst_clkdm_force_sleep(clkdm->prcm_partition,
					clkdm->cm_inst, clkdm->clkdm_offs);
	return 0;
}

static int omap4_clkdm_wakeup(struct clockdomain *clkdm)
{
	omap4_cminst_clkdm_force_wakeup(clkdm->prcm_partition,
					clkdm->cm_inst, clkdm->clkdm_offs);
	return 0;
}

static void omap4_clkdm_allow_idle(struct clockdomain *clkdm)
{
	omap4_cminst_clkdm_enable_hwsup(clkdm->prcm_partition,
					clkdm->cm_inst, clkdm->clkdm_offs);
}

static void omap4_clkdm_deny_idle(struct clockdomain *clkdm)
{
	omap4_cminst_clkdm_disable_hwsup(clkdm->prcm_partition,
					clkdm->cm_inst, clkdm->clkdm_offs);
}

static int omap4_clkdm_clk_enable(struct clockdomain *clkdm)
{
	if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
		return omap4_clkdm_wakeup(clkdm);

	return 0;
}

static int omap4_clkdm_clk_disable(struct clockdomain *clkdm)
{
	bool hwsup = false;

	if (!clkdm->prcm_partition)
		return 0;

	hwsup = omap4_cminst_is_clkdm_in_hwsup(clkdm->prcm_partition,
					clkdm->cm_inst, clkdm->clkdm_offs);

	if (!hwsup && (clkdm->flags & CLKDM_CAN_FORCE_SLEEP))
		omap4_clkdm_sleep(clkdm);

	return 0;
}

struct clkdm_ops omap4_clkdm_operations = {
	.clkdm_add_wkdep	= omap4_clkdm_add_wkup_sleep_dep,
	.clkdm_del_wkdep	= omap4_clkdm_del_wkup_sleep_dep,
	.clkdm_read_wkdep	= omap4_clkdm_read_wkup_sleep_dep,
	.clkdm_clear_all_wkdeps	= omap4_clkdm_clear_all_wkup_sleep_deps,
	.clkdm_add_sleepdep	= omap4_clkdm_add_wkup_sleep_dep,
	.clkdm_del_sleepdep	= omap4_clkdm_del_wkup_sleep_dep,
	.clkdm_read_sleepdep	= omap4_clkdm_read_wkup_sleep_dep,
	.clkdm_clear_all_sleepdeps	= omap4_clkdm_clear_all_wkup_sleep_deps,
	.clkdm_sleep		= omap4_clkdm_sleep,
	.clkdm_wakeup		= omap4_clkdm_wakeup,
	.clkdm_allow_idle	= omap4_clkdm_allow_idle,
	.clkdm_deny_idle	= omap4_clkdm_deny_idle,
	.clkdm_clk_enable	= omap4_clkdm_clk_enable,
	.clkdm_clk_disable	= omap4_clkdm_clk_disable,
};