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/* Copyright (c) 2013-2014, 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/init.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/cpu.h>
#include <linux/sched.h>
#include <linux/of.h>
#include <linux/of_address.h>
struct boot_stats {
uint32_t bootloader_start;
uint32_t bootloader_end;
uint32_t bootloader_display;
uint32_t bootloader_load_kernel;
};
static void __iomem *mpm_counter_base;
static uint32_t mpm_counter_freq;
static struct boot_stats __iomem *boot_stats;
static int mpm_parse_dt(void)
{
struct device_node *np;
u32 freq;
np = of_find_compatible_node(NULL, NULL, "qcom,msm-imem-boot_stats");
if (!np) {
pr_err("can't find qcom,msm-imem node\n");
return -ENODEV;
}
boot_stats = of_iomap(np, 0);
if (!boot_stats) {
pr_err("boot_stats: Can't map imem\n");
return -ENODEV;
}
np = of_find_compatible_node(NULL, NULL, "qcom,mpm2-sleep-counter");
if (!np) {
pr_err("mpm_counter: can't find DT node\n");
return -ENODEV;
}
if (!of_property_read_u32(np, "clock-frequency", &freq))
mpm_counter_freq = freq;
else
return -ENODEV;
if (of_get_address(np, 0, NULL, NULL)) {
mpm_counter_base = of_iomap(np, 0);
if (!mpm_counter_base) {
pr_err("mpm_counter: cant map counter base\n");
return -ENODEV;
}
}
return 0;
}
static void print_boot_stats(void)
{
pr_info("KPI: Bootloader start count = %u\n",
readl_relaxed(&boot_stats->bootloader_start));
pr_info("KPI: Bootloader end count = %u\n",
readl_relaxed(&boot_stats->bootloader_end));
pr_info("KPI: Bootloader display count = %u\n",
readl_relaxed(&boot_stats->bootloader_display));
pr_info("KPI: Bootloader load kernel count = %u\n",
readl_relaxed(&boot_stats->bootloader_load_kernel));
pr_info("KPI: Kernel MPM timestamp = %u\n",
readl_relaxed(mpm_counter_base));
pr_info("KPI: Kernel MPM Clock frequency = %u\n",
mpm_counter_freq);
}
int boot_stats_init(void)
{
int ret;
ret = mpm_parse_dt();
if (ret < 0)
return -ENODEV;
print_boot_stats();
iounmap(boot_stats);
iounmap(mpm_counter_base);
return 0;
}
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