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authorLinus Torvalds <torvalds@linux-foundation.org>2018-06-27 09:49:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-06-27 09:49:30 -0700
commit22c3b1521aedb4732a9dba7d4d861b7fbb4203f6 (patch)
treea5c191f63b7923882a77a0b42fd7718de384eb40 /arch/microblaze
parentdebd52a0506147c0ce8370ee82f5a3b79efa2f26 (diff)
parent45df561a7ae2ca5080708cc2cf84a236f4d930ef (diff)
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
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/Kconfig.debug7
-rw-r--r--arch/microblaze/include/asm/setup.h5
-rw-r--r--arch/microblaze/include/asm/unistd.h2
-rw-r--r--arch/microblaze/include/uapi/asm/unistd.h2
-rw-r--r--arch/microblaze/kernel/Makefile4
-rw-r--r--arch/microblaze/kernel/heartbeat.c72
-rw-r--r--arch/microblaze/kernel/platform.c29
-rw-r--r--arch/microblaze/kernel/reset.c11
-rw-r--r--arch/microblaze/kernel/syscall_table.S2
-rw-r--r--arch/microblaze/kernel/timer.c7
10 files changed, 12 insertions, 129 deletions
diff --git a/arch/microblaze/Kconfig.debug b/arch/microblaze/Kconfig.debug
index 331a3bb66297..93a737c8d1a6 100644
--- a/arch/microblaze/Kconfig.debug
+++ b/arch/microblaze/Kconfig.debug
@@ -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
diff --git a/arch/microblaze/include/asm/setup.h b/arch/microblaze/include/asm/setup.h
index d5384f6f36f7..ce9b7b786156 100644
--- a/arch/microblaze/include/asm/setup.h
+++ b/arch/microblaze/include/asm/setup.h
@@ -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,
diff --git a/arch/microblaze/include/asm/unistd.h b/arch/microblaze/include/asm/unistd.h
index 9774e1d9507b..a62d09420a47 100644
--- a/arch/microblaze/include/asm/unistd.h
+++ b/arch/microblaze/include/asm/unistd.h
@@ -38,6 +38,6 @@
#endif /* __ASSEMBLY__ */
-#define __NR_syscalls 399
+#define __NR_syscalls 401
#endif /* _ASM_MICROBLAZE_UNISTD_H */
diff --git a/arch/microblaze/include/uapi/asm/unistd.h b/arch/microblaze/include/uapi/asm/unistd.h
index eb156f914793..7a9f16a76413 100644
--- a/arch/microblaze/include/uapi/asm/unistd.h
+++ b/arch/microblaze/include/uapi/asm/unistd.h
@@ -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 */
diff --git a/arch/microblaze/kernel/Makefile b/arch/microblaze/kernel/Makefile
index 7e99cf6984a1..dd71637437f4 100644
--- a/arch/microblaze/kernel/Makefile
+++ b/arch/microblaze/kernel/Makefile
@@ -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
diff --git a/arch/microblaze/kernel/heartbeat.c b/arch/microblaze/kernel/heartbeat.c
deleted file mode 100644
index 2022130139d2..000000000000
--- a/arch/microblaze/kernel/heartbeat.c
+++ /dev/null
@@ -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);
- }
-}
diff --git a/arch/microblaze/kernel/platform.c b/arch/microblaze/kernel/platform.c
deleted file mode 100644
index 2540d60610d9..000000000000
--- a/arch/microblaze/kernel/platform.c
+++ /dev/null
@@ -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);
diff --git a/arch/microblaze/kernel/reset.c b/arch/microblaze/kernel/reset.c
index bab4c8330ef4..fcbe1daf6316 100644
--- a/arch/microblaze/kernel/reset.c
+++ b/arch/microblaze/kernel/reset.c
@@ -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)
diff --git a/arch/microblaze/kernel/syscall_table.S b/arch/microblaze/kernel/syscall_table.S
index 56bcf313121f..6ab650593792 100644
--- a/arch/microblaze/kernel/syscall_table.S
+++ b/arch/microblaze/kernel/syscall_table.S
@@ -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
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index 7de941cbbd94..a6683484b3a1 100644
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -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;