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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2011 Google, Inc.
*
* Author:
* Colin Cross <ccross@android.com>
*
* Copyright (C) 2010,2013, NVIDIA Corporation
*/
#include <linux/cpu_pm.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irqchip/arm-gic.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/of_address.h>
#include <linux/of.h>
#include <linux/syscore_ops.h>
#include <soc/tegra/irq.h>
#include "board.h"
#include "iomap.h"
#define SGI_MASK 0xFFFF
#ifdef CONFIG_PM_SLEEP
static void __iomem *tegra_gic_cpu_base;
#endif
bool tegra_pending_sgi(void)
{
u32 pending_set;
void __iomem *distbase = IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE);
pending_set = readl_relaxed(distbase + GIC_DIST_PENDING_SET);
if (pending_set & SGI_MASK)
return true;
return false;
}
#ifdef CONFIG_PM_SLEEP
static int tegra_gic_notifier(struct notifier_block *self,
unsigned long cmd, void *v)
{
switch (cmd) {
case CPU_PM_ENTER:
writel_relaxed(0x1E0, tegra_gic_cpu_base + GIC_CPU_CTRL);
break;
}
return NOTIFY_OK;
}
static struct notifier_block tegra_gic_notifier_block = {
.notifier_call = tegra_gic_notifier,
};
static const struct of_device_id tegra114_dt_gic_match[] __initconst = {
{ .compatible = "arm,cortex-a15-gic" },
{ }
};
static void __init tegra114_gic_cpu_pm_registration(void)
{
struct device_node *dn;
dn = of_find_matching_node(NULL, tegra114_dt_gic_match);
if (!dn)
return;
tegra_gic_cpu_base = of_iomap(dn, 1);
cpu_pm_register_notifier(&tegra_gic_notifier_block);
}
#else
static void __init tegra114_gic_cpu_pm_registration(void) { }
#endif
static const struct of_device_id tegra_ictlr_match[] __initconst = {
{ .compatible = "nvidia,tegra20-ictlr" },
{ .compatible = "nvidia,tegra30-ictlr" },
{ }
};
void __init tegra_init_irq(void)
{
if (WARN_ON(!of_find_matching_node(NULL, tegra_ictlr_match)))
pr_warn("Outdated DT detected, suspend/resume will NOT work\n");
tegra114_gic_cpu_pm_registration();
}
|
