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
|
/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/smp.h>
#include <linux/clk.h>
#include <linux/cpu.h>
#include <linux/sched.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <mach/msm_mpmctr.h>
static void __iomem *mpm_timer_base;
uint32_t msm_mpm_get_count(void)
{
uint32_t count;
if (!mpm_timer_base)
return 0;
count = __raw_readl_no_log(mpm_timer_base);
pr_debug("mpm sclk sync:(%u)", count);
return count;
}
EXPORT_SYMBOL(msm_mpm_get_count);
static inline void msm_mpmctr_show_count(void)
{
unsigned long long t;
unsigned long nsec_rem;
t = sched_clock();
nsec_rem = do_div(t, 1000000000)/1000;
printk(KERN_INFO "mpm_counter: [%5lu.%06lu]:(%u)\n",
(unsigned long)t, nsec_rem,
msm_mpm_get_count());
}
static struct of_device_id msm_mpmctr_of_match[] = {
{.compatible = "qcom,mpm2-sleep-counter"},
{}
};
static struct platform_driver msm_mpmctr_driver = {
.driver = {
.name = "msm_mpctr",
.owner = THIS_MODULE,
.of_match_table = msm_mpmctr_of_match,
},
};
static int __init mpmctr_set_register(struct device_node *np)
{
if (of_get_address(np, 0, NULL, NULL)) {
mpm_timer_base = of_iomap(np, 0);
if (!mpm_timer_base) {
pr_err("%s: cannot map timer base\n", __func__);
return -ENOMEM;
}
}
return 0;
}
static int __init msm_mpmctr_probe(struct platform_device *pdev)
{
if (!pdev->dev.of_node)
return -ENODEV;
if (mpmctr_set_register(pdev->dev.of_node))
return -ENODEV;
msm_mpmctr_show_count();
return 0;
}
static int __init mpmctr_init(void)
{
return platform_driver_probe(&msm_mpmctr_driver, msm_mpmctr_probe);
}
module_init(mpmctr_init)
|
