Commit 8da15e17 authored by Linus Walleij's avatar Linus Walleij
Browse files

ARM: ux500: decomission the non-DT MTU init sequence 



The MTU is now only initialized using the native clocksource
device tree matching.

Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent bddd5a2b

arch/arm/mach-ux500/timer.c

+2 −26
Original line number Diff line number Diff line
@@ -10,7 +10,6 @@ 
#include <linux/clocksource.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/platform_data/clocksource-nomadik-mtu.h>



#include <asm/smp_twd.h>
@@ -44,17 +43,14 @@ const static struct of_device_id prcmu_timer_of_match[] __initconst = { 


void __init ux500_timer_init(void)

{

	void __iomem *mtu_timer_base;

	void __iomem *prcmu_timer_base;

	void __iomem *tmp_base;

	struct device_node *np;



	if (cpu_is_u8500_family() || cpu_is_ux540_family()) {

		mtu_timer_base = __io_address(U8500_MTU0_BASE);

	if (cpu_is_u8500_family() || cpu_is_ux540_family())

		prcmu_timer_base = __io_address(U8500_PRCMU_TIMER_4_BASE);

	} else {

	else

		ux500_unknown_soc();

	}



	np = of_find_matching_node(NULL, prcmu_timer_of_match);

	if (!np)
@@ -67,26 +63,6 @@ void __init ux500_timer_init(void) 
	prcmu_timer_base = tmp_base;



dt_fail:

	/* Doing it the old fashioned way. */



	/*

	 * Here we register the timerblocks active in the system.

	 * Localtimers (twd) is started when both cpu is up and running.

	 * MTU register a clocksource, clockevent and sched_clock.

	 * Since the MTU is located in the VAPE power domain

	 * it will be cleared in sleep which makes it unsuitable.

	 * We however need it as a timer tick (clockevent)

	 * during boot to calibrate delay until twd is started.

	 * RTC-RTT have problems as timer tick during boot since it is

	 * depending on delay which is not yet calibrated. RTC-RTT is in the

	 * always-on powerdomain and is used as clockevent instead of twd when

	 * sleeping.

	 * The PRCMU timer 4 register a clocksource and

	 * sched_clock with higher rating then MTU since is always-on.

	 *

	 */

	if (!of_have_populated_dt())

		nmdk_timer_init(mtu_timer_base, IRQ_MTU0);

	clksrc_dbx500_prcmu_init(prcmu_timer_base);

	ux500_twd_init();

}