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Microblaze patches for 4.18-rc3

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- Fix architecture gpio heart beat code
 - Add new syscalls
 - Remove unused xlnx,compound handling
 - Remove platform.c
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Merge tag 'microblaze-v4.18-rc3' of git://git.monstr.eu/linux-2.6-microblaze

Pull microblaze fixes from Michal Simek:

 - fix architecture gpio heart beat code

 - add new syscalls

 - remove unused xlnx,compound handling

 - remove platform.c

* tag 'microblaze-v4.18-rc3' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: consolidate GPIO reset handling
  microblaze: remove unecessary of_platform_bus_probe call
  microblaze: Add new syscalls io_pgetevents and rseq
  microblaze: Remove architecture heart beat code
  microblaze: heartbeat: fix missing prom.h include
This commit is contained in:
Linus Torvalds 2018-06-27 09:49:30 -07:00
commit 22c3b1521a
10 changed files with 12 additions and 129 deletions
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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

5
arch/microblaze/include/asm/setup.h
View file

@ -19,15 +19,10 @@ 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 */
extern void of_platform_reset_gpio_probe(void);
void time_init(void);
void init_IRQ(void);
void machine_early_init(const char *cmdline, unsigned int ram,

2
arch/microblaze/include/asm/unistd.h
View file

@ -38,6 +38,6 @@
#endif /* __ASSEMBLY__ */
#define __NR_syscalls 399
#define __NR_syscalls 401
#endif /* _ASM_MICROBLAZE_UNISTD_H */

2
arch/microblaze/include/uapi/asm/unistd.h
View file

@ -415,5 +415,7 @@
#define __NR_pkey_alloc 396
#define __NR_pkey_free 397
#define __NR_statx 398
#define __NR_io_pgetevents 399
#define __NR_rseq 400
#endif /* _UAPI_ASM_MICROBLAZE_UNISTD_H */

4
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
@ -17,12 +16,11 @@ extra-y := head.o vmlinux.lds
obj-y += dma.o exceptions.o \
hw_exception_handler.o irq.o \
platform.o process.o prom.o ptrace.o \
process.o prom.o ptrace.o \
reset.o setup.o signal.o sys_microblaze.o timer.o traps.o unwind.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 <asm/setup.h>
#include <asm/page.h>
#include <asm/prom.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);
}
}

29
arch/microblaze/kernel/platform.c
View file

@ -1,29 +0,0 @@
/*
* Copyright 2008 Michal Simek <monstr@monstr.eu>
*
* based on virtex.c file
*
* Copyright 2007 Secret Lab Technologies Ltd.
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/init.h>
#include <linux/of_platform.h>
#include <asm/setup.h>
static struct of_device_id xilinx_of_bus_ids[] __initdata = {
{ .compatible = "simple-bus", },
{ .compatible = "xlnx,compound", },
{}
};
static int __init microblaze_device_probe(void)
{
of_platform_bus_probe(NULL, xilinx_of_bus_ids, NULL);
of_platform_reset_gpio_probe();
return 0;
}
device_initcall(microblaze_device_probe);

11
arch/microblaze/kernel/reset.c
View file

@ -18,7 +18,7 @@
static int handle; /* reset pin handle */
static unsigned int reset_val;
void of_platform_reset_gpio_probe(void)
static int of_platform_reset_gpio_probe(void)
{
int ret;
handle = of_get_named_gpio(of_find_node_by_path("/"),
@ -27,13 +27,13 @@ void of_platform_reset_gpio_probe(void)
if (!gpio_is_valid(handle)) {
pr_info("Skipping unavailable RESET gpio %d (%s)\n",
handle, "reset");
return;
return -ENODEV;
}
ret = gpio_request(handle, "reset");
if (ret < 0) {
pr_info("GPIO pin is already allocated\n");
return;
return ret;
}
/* get current setup value */
@ -51,11 +51,12 @@ void of_platform_reset_gpio_probe(void)
pr_info("RESET: Registered gpio device: %d, current val: %d\n",
handle, reset_val);
return;
return 0;
err:
gpio_free(handle);
return;
return ret;
}
device_initcall(of_platform_reset_gpio_probe);
static void gpio_system_reset(void)

2
arch/microblaze/kernel/syscall_table.S
View file

@ -400,3 +400,5 @@ ENTRY(sys_call_table)
.long sys_pkey_alloc
.long sys_pkey_free
.long sys_statx
.long sys_io_pgetevents
.long sys_rseq

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;