100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
/* 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)
|