提交 7dcca3e9 编写于 作者: L Linus Torvalds

Merge git://www.linux-watchdog.org/linux-watchdog

Pull watchdog updates from Wim Van Sebroeck:
 "This contains following changes:

   - Octeon: convert to watchdog-API and apply some fixes
   - Cadence wdt: remove dependency on ARCH
   - add DT bindings for qcom + msm
   - bcm281xx: Remove use of seq_printf return value
   - stmp3xxx_rtc_wdt + pnx4008_wdt: fix broken email addresses"

* git://www.linux-watchdog.org/linux-watchdog:
  watchdog: stmp3xxx_rtc_wdt: fix broken email address
  watchdog: pnx4008_wdt: fix broken email address
  watchdog: octeon: use fixed length string for register names
  watchdog: octeon: fix some trivial coding style issues
  watchdog: octeon: convert to WATCHDOG_CORE API
  watchdog: cadence: Remove Kconfig dependency on ARCH
  ARM: msm: add watchdog entries to DT timer binding doc
  ARM: qcom: add description of KPSS WDT for IPQ8064
  watchdog: qcom: use timer devicetree binding
  watchdog: bcm281xx: Remove use of seq_printf return value
......@@ -9,11 +9,17 @@ Properties:
"qcom,scss-timer" - scorpion subsystem
- interrupts : Interrupts for the debug timer, the first general purpose
timer, and optionally a second general purpose timer in that
order.
timer, and optionally a second general purpose timer, and
optionally as well, 2 watchdog interrupts, in that order.
- reg : Specifies the base address of the timer registers.
- clocks: Reference to the parent clocks, one per output clock. The parents
must appear in the same order as the clock names.
- clock-names: The name of the clocks as free-form strings. They should be in
the same order as the clocks.
- clock-frequency : The frequency of the debug timer and the general purpose
timer(s) in Hz in that order.
......@@ -29,9 +35,13 @@ Example:
compatible = "qcom,scss-timer", "qcom,msm-timer";
interrupts = <1 1 0x301>,
<1 2 0x301>,
<1 3 0x301>;
<1 3 0x301>,
<1 4 0x301>,
<1 5 0x301>;
reg = <0x0200a000 0x100>;
clock-frequency = <19200000>,
<32768>;
clocks = <&sleep_clk>;
clock-names = "sleep";
cpu-offset = <0x40000>;
};
......@@ -61,6 +61,14 @@
};
};
clocks {
sleep_clk: sleep_clk {
compatible = "fixed-clock";
clock-frequency = <32768>;
#clock-cells = <0>;
};
};
soc: soc {
#address-cells = <1>;
#size-cells = <1>;
......@@ -105,10 +113,14 @@
compatible = "qcom,kpss-timer", "qcom,msm-timer";
interrupts = <1 1 0x301>,
<1 2 0x301>,
<1 3 0x301>;
<1 3 0x301>,
<1 4 0x301>,
<1 5 0x301>;
reg = <0x0200a000 0x100>;
clock-frequency = <25000000>,
<32768>;
clocks = <&sleep_clk>;
clock-names = "sleep";
cpu-offset = <0x80000>;
};
......
......@@ -169,7 +169,6 @@ config AT91SAM9X_WATCHDOG
config CADENCE_WATCHDOG
tristate "Cadence Watchdog Timer"
depends on ARM
select WATCHDOG_CORE
help
Say Y here if you want to include support for the watchdog
......@@ -1190,6 +1189,7 @@ config OCTEON_WDT
tristate "Cavium OCTEON SOC family Watchdog Timer"
depends on CAVIUM_OCTEON_SOC
default y
select WATCHDOG_CORE
select EXPORT_UASM if OCTEON_WDT = m
help
Hardware driver for OCTEON's on chip watchdog timer.
......
......@@ -99,12 +99,14 @@ static int secure_register_read(struct bcm_kona_wdt *wdt, uint32_t offset)
static int bcm_kona_wdt_dbg_show(struct seq_file *s, void *data)
{
int ctl_val, cur_val, ret;
int ctl_val, cur_val;
unsigned long flags;
struct bcm_kona_wdt *wdt = s->private;
if (!wdt)
return seq_puts(s, "No device pointer\n");
if (!wdt) {
seq_puts(s, "No device pointer\n");
return 0;
}
spin_lock_irqsave(&wdt->lock, flags);
ctl_val = secure_register_read(wdt, SECWDOG_CTRL_REG);
......@@ -112,7 +114,7 @@ static int bcm_kona_wdt_dbg_show(struct seq_file *s, void *data)
spin_unlock_irqrestore(&wdt->lock, flags);
if (ctl_val < 0 || cur_val < 0) {
ret = seq_puts(s, "Error accessing hardware\n");
seq_puts(s, "Error accessing hardware\n");
} else {
int ctl, cur, ctl_sec, cur_sec, res;
......@@ -121,15 +123,18 @@ static int bcm_kona_wdt_dbg_show(struct seq_file *s, void *data)
cur = cur_val & SECWDOG_COUNT_MASK;
ctl_sec = TICKS_TO_SECS(ctl, wdt);
cur_sec = TICKS_TO_SECS(cur, wdt);
ret = seq_printf(s, "Resolution: %d / %d\n"
"Control: %d s / %d (%#x) ticks\n"
"Current: %d s / %d (%#x) ticks\n"
"Busy count: %lu\n", res,
wdt->resolution, ctl_sec, ctl, ctl, cur_sec,
cur, cur, wdt->busy_count);
seq_printf(s,
"Resolution: %d / %d\n"
"Control: %d s / %d (%#x) ticks\n"
"Current: %d s / %d (%#x) ticks\n"
"Busy count: %lu\n",
res, wdt->resolution,
ctl_sec, ctl, ctl,
cur_sec, cur, cur,
wdt->busy_count);
}
return ret;
return 0;
}
static int bcm_kona_dbg_open(struct inode *inode, struct file *file)
......
......@@ -3,6 +3,8 @@
*
* Copyright (C) 2007, 2008, 2009, 2010 Cavium Networks
*
* Converted to use WATCHDOG_CORE by Aaro Koskinen <aaro.koskinen@iki.fi>.
*
* Some parts derived from wdt.c
*
* (c) Copyright 1996-1997 Alan Cox <alan@lxorguk.ukuu.org.uk>,
......@@ -103,13 +105,10 @@ MODULE_PARM_DESC(nowayout,
"Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
static unsigned long octeon_wdt_is_open;
static char expect_close;
static u32 __initdata nmi_stage1_insns[64];
static u32 nmi_stage1_insns[64] __initdata;
/* We need one branch and therefore one relocation per target label. */
static struct uasm_label __initdata labels[5];
static struct uasm_reloc __initdata relocs[5];
static struct uasm_label labels[5] __initdata;
static struct uasm_reloc relocs[5] __initdata;
enum lable_id {
label_enter_bootloader = 1
......@@ -218,7 +217,8 @@ static void __init octeon_wdt_build_stage1(void)
pr_debug("\t.set pop\n");
if (len > 32)
panic("NMI stage 1 handler exceeds 32 instructions, was %d\n", len);
panic("NMI stage 1 handler exceeds 32 instructions, was %d\n",
len);
}
static int cpu2core(int cpu)
......@@ -294,6 +294,7 @@ static void octeon_wdt_write_hex(u64 value, int digits)
{
int d;
int v;
for (d = 0; d < digits; d++) {
v = (value >> ((digits - d - 1) * 4)) & 0xf;
if (v >= 10)
......@@ -303,7 +304,7 @@ static void octeon_wdt_write_hex(u64 value, int digits)
}
}
const char *reg_name[] = {
static const char reg_name[][3] = {
"$0", "at", "v0", "v1", "a0", "a1", "a2", "a3",
"a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3",
"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
......@@ -444,7 +445,7 @@ static int octeon_wdt_cpu_callback(struct notifier_block *nfb,
return NOTIFY_OK;
}
static void octeon_wdt_ping(void)
static int octeon_wdt_ping(struct watchdog_device __always_unused *wdog)
{
int cpu;
int coreid;
......@@ -457,10 +458,12 @@ static void octeon_wdt_ping(void)
!cpumask_test_cpu(cpu, &irq_enabled_cpus)) {
/* We have to enable the irq */
int irq = OCTEON_IRQ_WDOG0 + coreid;
enable_irq(irq);
cpumask_set_cpu(cpu, &irq_enabled_cpus);
}
}
return 0;
}
static void octeon_wdt_calc_parameters(int t)
......@@ -489,7 +492,8 @@ static void octeon_wdt_calc_parameters(int t)
timeout_cnt = ((octeon_get_io_clock_rate() >> 8) * timeout_sec) >> 8;
}
static int octeon_wdt_set_heartbeat(int t)
static int octeon_wdt_set_timeout(struct watchdog_device *wdog,
unsigned int t)
{
int cpu;
int coreid;
......@@ -509,158 +513,45 @@ static int octeon_wdt_set_heartbeat(int t)
cvmx_write_csr(CVMX_CIU_WDOGX(coreid), ciu_wdog.u64);
cvmx_write_csr(CVMX_CIU_PP_POKEX(coreid), 1);
}
octeon_wdt_ping(); /* Get the irqs back on. */
octeon_wdt_ping(wdog); /* Get the irqs back on. */
return 0;
}
/**
* octeon_wdt_write:
* @file: file handle to the watchdog
* @buf: buffer to write (unused as data does not matter here
* @count: count of bytes
* @ppos: pointer to the position to write. No seeks allowed
*
* A write to a watchdog device is defined as a keepalive signal. Any
* write of data will do, as we we don't define content meaning.
*/
static ssize_t octeon_wdt_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
if (count) {
if (!nowayout) {
size_t i;
/* In case it was set long ago */
expect_close = 0;
for (i = 0; i != count; i++) {
char c;
if (get_user(c, buf + i))
return -EFAULT;
if (c == 'V')
expect_close = 1;
}
}
octeon_wdt_ping();
}
return count;
}
/**
* octeon_wdt_ioctl:
* @file: file handle to the device
* @cmd: watchdog command
* @arg: argument pointer
*
* The watchdog API defines a common set of functions for all
* watchdogs according to their available features. We only
* actually usefully support querying capabilities and setting
* the timeout.
*/
static long octeon_wdt_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
int new_heartbeat;
static struct watchdog_info ident = {
.options = WDIOF_SETTIMEOUT|
WDIOF_MAGICCLOSE|
WDIOF_KEEPALIVEPING,
.firmware_version = 1,
.identity = "OCTEON",
};
switch (cmd) {
case WDIOC_GETSUPPORT:
return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
return put_user(0, p);
case WDIOC_KEEPALIVE:
octeon_wdt_ping();
return 0;
case WDIOC_SETTIMEOUT:
if (get_user(new_heartbeat, p))
return -EFAULT;
if (octeon_wdt_set_heartbeat(new_heartbeat))
return -EINVAL;
/* Fall through. */
case WDIOC_GETTIMEOUT:
return put_user(heartbeat, p);
default:
return -ENOTTY;
}
}
/**
* octeon_wdt_open:
* @inode: inode of device
* @file: file handle to device
*
* The watchdog device has been opened. The watchdog device is single
* open and on opening we do a ping to reset the counters.
*/
static int octeon_wdt_open(struct inode *inode, struct file *file)
static int octeon_wdt_start(struct watchdog_device *wdog)
{
if (test_and_set_bit(0, &octeon_wdt_is_open))
return -EBUSY;
/*
* Activate
*/
octeon_wdt_ping();
octeon_wdt_ping(wdog);
do_coundown = 1;
return nonseekable_open(inode, file);
return 0;
}
/**
* octeon_wdt_release:
* @inode: inode to board
* @file: file handle to board
*
* The watchdog has a configurable API. There is a religious dispute
* between people who want their watchdog to be able to shut down and
* those who want to be sure if the watchdog manager dies the machine
* reboots. In the former case we disable the counters, in the latter
* case you have to open it again very soon.
*/
static int octeon_wdt_release(struct inode *inode, struct file *file)
static int octeon_wdt_stop(struct watchdog_device *wdog)
{
if (expect_close) {
do_coundown = 0;
octeon_wdt_ping();
} else {
pr_crit("WDT device closed unexpectedly. WDT will not stop!\n");
}
clear_bit(0, &octeon_wdt_is_open);
expect_close = 0;
do_coundown = 0;
octeon_wdt_ping(wdog);
return 0;
}
static const struct file_operations octeon_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = octeon_wdt_write,
.unlocked_ioctl = octeon_wdt_ioctl,
.open = octeon_wdt_open,
.release = octeon_wdt_release,
static struct notifier_block octeon_wdt_cpu_notifier = {
.notifier_call = octeon_wdt_cpu_callback,
};
static struct miscdevice octeon_wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &octeon_wdt_fops,
static const struct watchdog_info octeon_wdt_info = {
.options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING,
.identity = "OCTEON",
};
static struct notifier_block octeon_wdt_cpu_notifier = {
.notifier_call = octeon_wdt_cpu_callback,
static const struct watchdog_ops octeon_wdt_ops = {
.owner = THIS_MODULE,
.start = octeon_wdt_start,
.stop = octeon_wdt_stop,
.ping = octeon_wdt_ping,
.set_timeout = octeon_wdt_set_timeout,
};
static struct watchdog_device octeon_wdt = {
.info = &octeon_wdt_info,
.ops = &octeon_wdt_ops,
};
/**
* Module/ driver initialization.
......@@ -685,7 +576,8 @@ static int __init octeon_wdt_init(void)
max_timeout_sec = 6;
do {
max_timeout_sec--;
timeout_cnt = ((octeon_get_io_clock_rate() >> 8) * max_timeout_sec) >> 8;
timeout_cnt = ((octeon_get_io_clock_rate() >> 8) *
max_timeout_sec) >> 8;
} while (timeout_cnt > 65535);
BUG_ON(timeout_cnt == 0);
......@@ -694,11 +586,15 @@ static int __init octeon_wdt_init(void)
pr_info("Initial granularity %d Sec\n", timeout_sec);
ret = misc_register(&octeon_wdt_miscdev);
octeon_wdt.timeout = timeout_sec;
octeon_wdt.max_timeout = UINT_MAX;
watchdog_set_nowayout(&octeon_wdt, nowayout);
ret = watchdog_register_device(&octeon_wdt);
if (ret) {
pr_err("cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
goto out;
pr_err("watchdog_register_device() failed: %d\n", ret);
return ret;
}
/* Build the NMI handler ... */
......@@ -721,8 +617,7 @@ static int __init octeon_wdt_init(void)
__register_hotcpu_notifier(&octeon_wdt_cpu_notifier);
cpu_notifier_register_done();
out:
return ret;
return 0;
}
/**
......@@ -732,7 +627,7 @@ static void __exit octeon_wdt_cleanup(void)
{
int cpu;
misc_deregister(&octeon_wdt_miscdev);
watchdog_unregister_device(&octeon_wdt);
cpu_notifier_register_begin();
__unregister_hotcpu_notifier(&octeon_wdt_cpu_notifier);
......
......@@ -216,7 +216,7 @@ static struct platform_driver platform_wdt_driver = {
module_platform_driver(platform_wdt_driver);
MODULE_AUTHOR("MontaVista Software, Inc. <source@mvista.com>");
MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");
MODULE_DESCRIPTION("PNX4008 Watchdog Driver");
module_param(heartbeat, uint, 0);
......
......@@ -20,9 +20,9 @@
#include <linux/reboot.h>
#include <linux/watchdog.h>
#define WDT_RST 0x0
#define WDT_EN 0x8
#define WDT_BITE_TIME 0x24
#define WDT_RST 0x38
#define WDT_EN 0x40
#define WDT_BITE_TIME 0x5C
struct qcom_wdt {
struct watchdog_device wdd;
......@@ -117,6 +117,8 @@ static int qcom_wdt_probe(struct platform_device *pdev)
{
struct qcom_wdt *wdt;
struct resource *res;
struct device_node *np = pdev->dev.of_node;
u32 percpu_offset;
int ret;
wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
......@@ -124,6 +126,14 @@ static int qcom_wdt_probe(struct platform_device *pdev)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
/* We use CPU0's DGT for the watchdog */
if (of_property_read_u32(np, "cpu-offset", &percpu_offset))
percpu_offset = 0;
res->start += percpu_offset;
res->end += percpu_offset;
wdt->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(wdt->base))
return PTR_ERR(wdt->base);
......@@ -203,9 +213,8 @@ static int qcom_wdt_remove(struct platform_device *pdev)
}
static const struct of_device_id qcom_wdt_of_table[] = {
{ .compatible = "qcom,kpss-wdt-msm8960", },
{ .compatible = "qcom,kpss-wdt-apq8064", },
{ .compatible = "qcom,kpss-wdt-ipq8064", },
{ .compatible = "qcom,kpss-timer" },
{ .compatible = "qcom,scss-timer" },
{ },
};
MODULE_DEVICE_TABLE(of, qcom_wdt_of_table);
......
/*
* Watchdog driver for the RTC based watchdog in STMP3xxx and i.MX23/28
*
* Author: Wolfram Sang <w.sang@pengutronix.de>
* Author: Wolfram Sang <kernel@pengutronix.de>
*
* Copyright (C) 2011-12 Wolfram Sang, Pengutronix
*
......@@ -129,4 +129,4 @@ module_platform_driver(stmp3xxx_wdt_driver);
MODULE_DESCRIPTION("STMP3XXX RTC Watchdog Driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");
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