iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

microblaze: Remove architecture heart beat code

Browse Source 
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: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Michal Simek 2018-06-12 12:46:17 +02:00
parent 71ab91157e
commit 5cf8da7bc0
5 changed files with 0 additions and 91 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/microblaze/Kconfig.debug
View File

@ -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

3
arch/microblaze/include/asm/setup.h
View File

@ -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 */

2
arch/microblaze/kernel/Makefile
View File

@ -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

72
arch/microblaze/kernel/heartbeat.c
View File

@ -1,72 +0,0 @@
/*
* 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);
}
}

7
arch/microblaze/kernel/timer.c
View File

@ -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;