cregit-Linux how code gets into the kernel

Release 4.11 drivers/clocksource/tango_xtal.c

#include <linux/clocksource.h>
#include <linux/sched_clock.h>
#include <linux/of_address.h>
#include <linux/printk.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/clk.h>


static void __iomem *xtal_in_cnt;

static struct delay_timer delay_timer;


static unsigned long notrace read_xtal_counter(void) { return readl_relaxed(xtal_in_cnt); }

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Marc Gonzalez16100.00%1100.00%
Total16100.00%1100.00%


static u64 notrace read_sched_clock(void) { return read_xtal_counter(); }

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Marc Gonzalez13100.00%1100.00%
Total13100.00%1100.00%


static int __init tango_clocksource_init(struct device_node *np) { struct clk *clk; int xtal_freq, ret; xtal_in_cnt = of_iomap(np, 0); if (xtal_in_cnt == NULL) { pr_err("%s: invalid address\n", np->full_name); return -ENXIO; } clk = of_clk_get(np, 0); if (IS_ERR(clk)) { pr_err("%s: invalid clock\n", np->full_name); return PTR_ERR(clk); } xtal_freq = clk_get_rate(clk); delay_timer.freq = xtal_freq; delay_timer.read_current_timer = read_xtal_counter; ret = clocksource_mmio_init(xtal_in_cnt, "tango-xtal", xtal_freq, 350, 32, clocksource_mmio_readl_up); if (ret) { pr_err("%s: registration failed\n", np->full_name); return ret; } sched_clock_register(read_sched_clock, 32, xtal_freq); register_current_timer_delay(&delay_timer); return 0; }

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PersonTokensPropCommitsCommitProp
Marc Gonzalez13082.80%133.33%
Daniel Lezcano2717.20%266.67%
Total157100.00%3100.00%

CLOCKSOURCE_OF_DECLARE(tango, "sigma,tick-counter", tango_clocksource_init);

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PersonTokensPropCommitsCommitProp
Marc Gonzalez19987.67%125.00%
Daniel Lezcano2812.33%375.00%
Total227100.00%4100.00%
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