mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-02 23:27:06 +00:00
watchdog: add driver for the MEN 16z069 IP-Core
Add a driver for the MEN 16z069 Watchdog and Reset Controller IP-Core. Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Michael Moese <mmoese@suse.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
parent
28e65edd73
commit
81ceed41d0
4 changed files with 187 additions and 0 deletions
|
@ -9299,6 +9299,12 @@ F: drivers/leds/leds-menf21bmc.c
|
||||||
F: drivers/hwmon/menf21bmc_hwmon.c
|
F: drivers/hwmon/menf21bmc_hwmon.c
|
||||||
F: Documentation/hwmon/menf21bmc
|
F: Documentation/hwmon/menf21bmc
|
||||||
|
|
||||||
|
MEN Z069 WATCHDOG DRIVER
|
||||||
|
M: Johannes Thumshirn <jth@kernel.org>
|
||||||
|
L: linux-watchdog@vger.kernel.org
|
||||||
|
S: Maintained
|
||||||
|
F: drivers/watchdog/menz069_wdt.c
|
||||||
|
|
||||||
MESON AO CEC DRIVER FOR AMLOGIC SOCS
|
MESON AO CEC DRIVER FOR AMLOGIC SOCS
|
||||||
M: Neil Armstrong <narmstrong@baylibre.com>
|
M: Neil Armstrong <narmstrong@baylibre.com>
|
||||||
L: linux-media@lists.freedesktop.org
|
L: linux-media@lists.freedesktop.org
|
||||||
|
|
|
@ -161,6 +161,16 @@ config MENF21BMC_WATCHDOG
|
||||||
This driver can also be built as a module. If so the module
|
This driver can also be built as a module. If so the module
|
||||||
will be called menf21bmc_wdt.
|
will be called menf21bmc_wdt.
|
||||||
|
|
||||||
|
config MENZ069_WATCHDOG
|
||||||
|
tristate "MEN 16Z069 Watchdog"
|
||||||
|
depends on MCB || COMPILE_TEST
|
||||||
|
select WATCHDOG_CORE
|
||||||
|
help
|
||||||
|
Say Y here to include support for the MEN 16Z069 Watchdog.
|
||||||
|
|
||||||
|
This driver can also be built as a module. If so the module
|
||||||
|
will be called menz069_wdt.
|
||||||
|
|
||||||
config TANGOX_WATCHDOG
|
config TANGOX_WATCHDOG
|
||||||
tristate "Sigma Designs SMP86xx/SMP87xx watchdog"
|
tristate "Sigma Designs SMP86xx/SMP87xx watchdog"
|
||||||
select WATCHDOG_CORE
|
select WATCHDOG_CORE
|
||||||
|
|
|
@ -215,4 +215,5 @@ obj-$(CONFIG_MAX77620_WATCHDOG) += max77620_wdt.o
|
||||||
obj-$(CONFIG_ZIIRAVE_WATCHDOG) += ziirave_wdt.o
|
obj-$(CONFIG_ZIIRAVE_WATCHDOG) += ziirave_wdt.o
|
||||||
obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
|
obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
|
||||||
obj-$(CONFIG_MENF21BMC_WATCHDOG) += menf21bmc_wdt.o
|
obj-$(CONFIG_MENF21BMC_WATCHDOG) += menf21bmc_wdt.o
|
||||||
|
obj-$(CONFIG_MENZ069_WATCHDOG) += menz69_wdt.o
|
||||||
obj-$(CONFIG_RAVE_SP_WATCHDOG) += rave-sp-wdt.o
|
obj-$(CONFIG_RAVE_SP_WATCHDOG) += rave-sp-wdt.o
|
||||||
|
|
170
drivers/watchdog/menz69_wdt.c
Normal file
170
drivers/watchdog/menz69_wdt.c
Normal file
|
@ -0,0 +1,170 @@
|
||||||
|
// SPDX-License-Identifier: GPL-2.0
|
||||||
|
/*
|
||||||
|
* Watchdog driver for the MEN z069 IP-Core
|
||||||
|
*
|
||||||
|
* Copyright (C) 2018 Johannes Thumshirn <jth@kernel.org>
|
||||||
|
*/
|
||||||
|
#include <linux/io.h>
|
||||||
|
#include <linux/kernel.h>
|
||||||
|
#include <linux/mcb.h>
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/watchdog.h>
|
||||||
|
|
||||||
|
struct men_z069_drv {
|
||||||
|
struct watchdog_device wdt;
|
||||||
|
void __iomem *base;
|
||||||
|
struct resource *mem;
|
||||||
|
};
|
||||||
|
|
||||||
|
#define MEN_Z069_WTR 0x10
|
||||||
|
#define MEN_Z069_WTR_WDEN BIT(15)
|
||||||
|
#define MEN_Z069_WTR_WDET_MASK 0x7fff
|
||||||
|
#define MEN_Z069_WVR 0x14
|
||||||
|
|
||||||
|
#define MEN_Z069_TIMER_FREQ 500 /* 500 Hz */
|
||||||
|
#define MEN_Z069_WDT_COUNTER_MIN 1
|
||||||
|
#define MEN_Z069_WDT_COUNTER_MAX 0x7fff
|
||||||
|
#define MEN_Z069_DEFAULT_TIMEOUT 30
|
||||||
|
|
||||||
|
static bool nowayout = WATCHDOG_NOWAYOUT;
|
||||||
|
module_param(nowayout, bool, 0);
|
||||||
|
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
|
||||||
|
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
|
||||||
|
|
||||||
|
static int men_z069_wdt_start(struct watchdog_device *wdt)
|
||||||
|
{
|
||||||
|
struct men_z069_drv *drv = watchdog_get_drvdata(wdt);
|
||||||
|
u16 val;
|
||||||
|
|
||||||
|
val = readw(drv->base + MEN_Z069_WTR);
|
||||||
|
val |= MEN_Z069_WTR_WDEN;
|
||||||
|
writew(val, drv->base + MEN_Z069_WTR);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int men_z069_wdt_stop(struct watchdog_device *wdt)
|
||||||
|
{
|
||||||
|
struct men_z069_drv *drv = watchdog_get_drvdata(wdt);
|
||||||
|
u16 val;
|
||||||
|
|
||||||
|
val = readw(drv->base + MEN_Z069_WTR);
|
||||||
|
val &= ~MEN_Z069_WTR_WDEN;
|
||||||
|
writew(val, drv->base + MEN_Z069_WTR);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int men_z069_wdt_ping(struct watchdog_device *wdt)
|
||||||
|
{
|
||||||
|
struct men_z069_drv *drv = watchdog_get_drvdata(wdt);
|
||||||
|
u16 val;
|
||||||
|
|
||||||
|
/* The watchdog trigger value toggles between 0x5555 and 0xaaaa */
|
||||||
|
val = readw(drv->base + MEN_Z069_WVR);
|
||||||
|
val ^= 0xffff;
|
||||||
|
writew(val, drv->base + MEN_Z069_WVR);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int men_z069_wdt_set_timeout(struct watchdog_device *wdt,
|
||||||
|
unsigned int timeout)
|
||||||
|
{
|
||||||
|
struct men_z069_drv *drv = watchdog_get_drvdata(wdt);
|
||||||
|
u16 reg, val, ena;
|
||||||
|
|
||||||
|
wdt->timeout = timeout;
|
||||||
|
val = timeout * MEN_Z069_TIMER_FREQ;
|
||||||
|
|
||||||
|
reg = readw(drv->base + MEN_Z069_WVR);
|
||||||
|
ena = reg & MEN_Z069_WTR_WDEN;
|
||||||
|
reg = ena | val;
|
||||||
|
writew(reg, drv->base + MEN_Z069_WTR);
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct watchdog_info men_z069_info = {
|
||||||
|
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
|
||||||
|
.identity = "MEN z069 Watchdog",
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct watchdog_ops men_z069_ops = {
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
.start = men_z069_wdt_start,
|
||||||
|
.stop = men_z069_wdt_stop,
|
||||||
|
.ping = men_z069_wdt_ping,
|
||||||
|
.set_timeout = men_z069_wdt_set_timeout,
|
||||||
|
};
|
||||||
|
|
||||||
|
static struct watchdog_device men_z069_wdt = {
|
||||||
|
.info = &men_z069_info,
|
||||||
|
.ops = &men_z069_ops,
|
||||||
|
.timeout = MEN_Z069_DEFAULT_TIMEOUT,
|
||||||
|
.min_timeout = 1,
|
||||||
|
.max_timeout = MEN_Z069_WDT_COUNTER_MAX / MEN_Z069_TIMER_FREQ,
|
||||||
|
};
|
||||||
|
|
||||||
|
static int men_z069_probe(struct mcb_device *dev,
|
||||||
|
const struct mcb_device_id *id)
|
||||||
|
{
|
||||||
|
struct men_z069_drv *drv;
|
||||||
|
struct resource *mem;
|
||||||
|
|
||||||
|
drv = devm_kzalloc(&dev->dev, sizeof(struct men_z069_drv), GFP_KERNEL);
|
||||||
|
if (!drv)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
mem = mcb_request_mem(dev, "z069-wdt");
|
||||||
|
if (IS_ERR(mem))
|
||||||
|
return PTR_ERR(mem);
|
||||||
|
|
||||||
|
drv->base = devm_ioremap(&dev->dev, mem->start, resource_size(mem));
|
||||||
|
if (drv->base == NULL)
|
||||||
|
goto release_mem;
|
||||||
|
|
||||||
|
drv->mem = mem;
|
||||||
|
|
||||||
|
drv->wdt = men_z069_wdt;
|
||||||
|
watchdog_init_timeout(&drv->wdt, 0, &dev->dev);
|
||||||
|
watchdog_set_nowayout(&drv->wdt, nowayout);
|
||||||
|
watchdog_set_drvdata(&drv->wdt, drv);
|
||||||
|
drv->wdt.parent = &dev->dev;
|
||||||
|
mcb_set_drvdata(dev, drv);
|
||||||
|
|
||||||
|
return watchdog_register_device(&men_z069_wdt);
|
||||||
|
|
||||||
|
release_mem:
|
||||||
|
mcb_release_mem(mem);
|
||||||
|
return -ENOMEM;
|
||||||
|
}
|
||||||
|
|
||||||
|
static void men_z069_remove(struct mcb_device *dev)
|
||||||
|
{
|
||||||
|
struct men_z069_drv *drv = mcb_get_drvdata(dev);
|
||||||
|
|
||||||
|
watchdog_unregister_device(&drv->wdt);
|
||||||
|
mcb_release_mem(drv->mem);
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct mcb_device_id men_z069_ids[] = {
|
||||||
|
{ .device = 0x45 },
|
||||||
|
{ }
|
||||||
|
};
|
||||||
|
MODULE_DEVICE_TABLE(mcb, men_z069_ids);
|
||||||
|
|
||||||
|
static struct mcb_driver men_z069_driver = {
|
||||||
|
.driver = {
|
||||||
|
.name = "z069-wdt",
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
},
|
||||||
|
.probe = men_z069_probe,
|
||||||
|
.remove = men_z069_remove,
|
||||||
|
.id_table = men_z069_ids,
|
||||||
|
};
|
||||||
|
module_mcb_driver(men_z069_driver);
|
||||||
|
|
||||||
|
MODULE_AUTHOR("Johannes Thumshirn <jth@kernel.org>");
|
||||||
|
MODULE_LICENSE("GPL v2");
|
||||||
|
MODULE_ALIAS("mcb:16z069");
|
Loading…
Reference in a new issue