clocksource: sti: Provide 'use timer as sched clock' capability (ff45d8dd) · Commits · 戴 / test

drivers/clocksource/clksrc_st_lpc.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -16,6 +16,7 @@
		#include <linux/clocksource.h>
		#include <linux/init.h>
		#include <linux/of_address.h>
		#include <linux/sched_clock.h>
		#include <linux/slab.h>

		#include <dt-bindings/mfd/st-lpc.h>
		@@ -38,6 +39,11 @@ static void __init st_clksrc_reset(void)
		writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
		}

		static u64 notrace st_clksrc_sched_clock_read(void)
		{
		return (u64)readl_relaxed(ddata.base + LPC_LPT_LSB_OFF);
		}

		static int __init st_clksrc_init(void)
		{
		unsigned long rate;
		@@ -47,6 +53,8 @@ static int __init st_clksrc_init(void)

		rate = clk_get_rate(ddata.clk);

		sched_clock_register(st_clksrc_sched_clock_read, 32, rate);

		ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
		"clksrc-st-lpc", rate, 300, 32,
		clocksource_mmio_readl_up);