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Commit 5cf8da7b authored by Michal Simek's avatar Michal Simek
Browse files

microblaze: Remove architecture heart beat code 



There is no reason to keep this gpio based code in architecture. Use
ledtrig-heartbeat.c instead which is much more flexible then this
ancient code.

Signed-off-by: default avatarMichal Simek <michal.simek@xilinx.com>
Reviewed-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 71ab9115

arch/microblaze/Kconfig.debug

+0 −7
Original line number Diff line number Diff line
@@ -8,11 +8,4 @@ config TRACE_IRQFLAGS_SUPPORT 


source "lib/Kconfig.debug"



config HEART_BEAT

	bool "Heart beat function for kernel"

	default n

	help

	  This option turns on/off heart beat kernel functionality.

	  First GPIO node is taken.



endmenu

arch/microblaze/include/asm/setup.h

+0 −3
Original line number Diff line number Diff line
@@ -19,9 +19,6 @@ extern char cmd_line[COMMAND_LINE_SIZE]; 


extern char *klimit;



void microblaze_heartbeat(void);

void microblaze_setup_heartbeat(void);



#   ifdef CONFIG_MMU

extern void mmu_reset(void);

#   endif /* CONFIG_MMU */

arch/microblaze/kernel/Makefile

+0 −2
Original line number Diff line number Diff line
@@ -8,7 +8,6 @@ ifdef CONFIG_FUNCTION_TRACER 
CFLAGS_REMOVE_timer.o = -pg

CFLAGS_REMOVE_intc.o = -pg

CFLAGS_REMOVE_early_printk.o = -pg

CFLAGS_REMOVE_heartbeat.o = -pg

CFLAGS_REMOVE_ftrace.o = -pg

CFLAGS_REMOVE_process.o = -pg

endif
@@ -22,7 +21,6 @@ obj-y += dma.o exceptions.o \ 


obj-y += cpu/



obj-$(CONFIG_HEART_BEAT)	+= heartbeat.o

obj-$(CONFIG_MODULES)		+= microblaze_ksyms.o module.o

obj-$(CONFIG_MMU)		+= misc.o

obj-$(CONFIG_STACKTRACE)	+= stacktrace.o

arch/microblaze/kernel/heartbeat.c

deleted100644 → 0
+0 −72
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>

 * Copyright (C) 2007-2009 PetaLogix

 * Copyright (C) 2006 Atmark Techno, Inc.

 *

 * This file is subject to the terms and conditions of the GNU General Public

 * License. See the file "COPYING" in the main directory of this archive

 * for more details.

 */



#include <linux/sched.h>

#include <linux/sched/loadavg.h>

#include <linux/io.h>

#include <linux/of.h>



#include <asm/setup.h>

#include <asm/page.h>



static unsigned int base_addr;



void microblaze_heartbeat(void)

{

	static unsigned int cnt, period, dist;



	if (base_addr) {

		if (cnt == 0 || cnt == dist)

			out_be32(base_addr, 1);

		else if (cnt == 7 || cnt == dist + 7)

			out_be32(base_addr, 0);



		if (++cnt > period) {

			cnt = 0;

			/*

			 * The hyperbolic function below modifies the heartbeat

			 * period length in dependency of the current (5min)

			 * load. It goes through the points f(0)=126, f(1)=86,

			 * f(5)=51, f(inf)->30.

			 */

			period = ((672 << FSHIFT) / (5 * avenrun[0] +

						(7 << FSHIFT))) + 30;

			dist = period / 4;

		}

	}

}



void microblaze_setup_heartbeat(void)

{

	struct device_node *gpio = NULL;

	int *prop;

	int j;

	const char * const gpio_list[] = {

		"xlnx,xps-gpio-1.00.a",

		NULL

	};



	for (j = 0; gpio_list[j] != NULL; j++) {

		gpio = of_find_compatible_node(NULL, NULL, gpio_list[j]);

		if (gpio)

			break;

	}



	if (gpio) {

		base_addr = be32_to_cpup(of_get_property(gpio, "reg", NULL));

		base_addr = (unsigned long) ioremap(base_addr, PAGE_SIZE);

		pr_notice("Heartbeat GPIO at 0x%x\n", base_addr);



		/* GPIO is configured as output */

		prop = (int *) of_get_property(gpio, "xlnx,is-bidir", NULL);

		if (prop)

			out_be32(base_addr + 4, 0);

	}

}

arch/microblaze/kernel/timer.c

+0 −7
Original line number Diff line number Diff line
@@ -156,9 +156,6 @@ static inline void timer_ack(void) 
static irqreturn_t timer_interrupt(int irq, void *dev_id)

{

	struct clock_event_device *evt = &clockevent_xilinx_timer;

#ifdef CONFIG_HEART_BEAT

	microblaze_heartbeat();

#endif

	timer_ack();

	evt->event_handler(evt);

	return IRQ_HANDLED;
@@ -318,10 +315,6 @@ static int __init xilinx_timer_init(struct device_node *timer) 
		return ret;

	}



#ifdef CONFIG_HEART_BEAT

	microblaze_setup_heartbeat();

#endif



	ret = xilinx_clocksource_init();

	if (ret)

		return ret;