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ssb: register watchdog driver

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Register the watchdog driver to the system if it is a SoC. Using the
watchdog on a non SoC device, like a PCI card, will make the PCI
card die when the timeout expired, but starting it again is not
supported by ssb.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Hauke Mehrtens 2012-12-05 18:46:08 +01:00 committed by John W. Linville
parent 9f640a6376
commit bde327eff8
4 changed files with 55 additions and 0 deletions
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35
drivers/ssb/embedded.c
View File

@ -4,11 +4,13 @@
*
* Copyright 2005-2008, Broadcom Corporation
* Copyright 2006-2008, Michael Buesch <m@bues.ch>
* Copyright 2012, Hauke Mehrtens <hauke@hauke-m.de>
*
* Licensed under the GNU/GPL. See COPYING for details.
*/
#include <linux/export.h>
#include <linux/platform_device.h>
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_embedded.h>
#include <linux/ssb/ssb_driver_pci.h>
@ -32,6 +34,39 @@ int ssb_watchdog_timer_set(struct ssb_bus *bus, u32 ticks)
}
EXPORT_SYMBOL(ssb_watchdog_timer_set);
int ssb_watchdog_register(struct ssb_bus *bus)
{
struct bcm47xx_wdt wdt = {};
struct platform_device *pdev;
if (ssb_chipco_available(&bus->chipco)) {
wdt.driver_data = &bus->chipco;
wdt.timer_set = ssb_chipco_watchdog_timer_set_wdt;
wdt.timer_set_ms = ssb_chipco_watchdog_timer_set_ms;
wdt.max_timer_ms = bus->chipco.max_timer_ms;
} else if (ssb_extif_available(&bus->extif)) {
wdt.driver_data = &bus->extif;
wdt.timer_set = ssb_extif_watchdog_timer_set_wdt;
wdt.timer_set_ms = ssb_extif_watchdog_timer_set_ms;
wdt.max_timer_ms = SSB_EXTIF_WATCHDOG_MAX_TIMER_MS;
} else {
return -ENODEV;
}
pdev = platform_device_register_data(NULL, "bcm47xx-wdt",
bus->busnumber, &wdt,
sizeof(wdt));
if (IS_ERR(pdev)) {
ssb_dprintk(KERN_INFO PFX
"can not register watchdog device, err: %li\n",
PTR_ERR(pdev));
return PTR_ERR(pdev);
}
bus->watchdog = pdev;
return 0;
}
u32 ssb_gpio_in(struct ssb_bus *bus, u32 mask)
{
unsigned long flags;

8
drivers/ssb/main.c
View File

@ -13,6 +13,7 @@
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/ssb/ssb.h>
#include <linux/ssb/ssb_regs.h>
#include <linux/ssb/ssb_driver_gige.h>
@ -433,6 +434,11 @@ static void ssb_devices_unregister(struct ssb_bus *bus)
if (sdev->dev)
device_unregister(sdev->dev);
}
#ifdef CONFIG_SSB_EMBEDDED
if (bus->bustype == SSB_BUSTYPE_SSB)
platform_device_unregister(bus->watchdog);
#endif
}
void ssb_bus_unregister(struct ssb_bus *bus)
@ -561,6 +567,8 @@ static int __devinit ssb_attach_queued_buses(void)
if (err)
goto error;
ssb_pcicore_init(&bus->pcicore);
if (bus->bustype == SSB_BUSTYPE_SSB)
ssb_watchdog_register(bus);
ssb_bus_may_powerdown(bus);
err = ssb_devices_register(bus);

10
drivers/ssb/ssb_private.h
View File

@ -232,4 +232,14 @@ static inline u32 ssb_extif_watchdog_timer_set_ms(struct bcm47xx_wdt *wdt,
return 0;
}
#endif
#ifdef CONFIG_SSB_EMBEDDED
extern int ssb_watchdog_register(struct ssb_bus *bus);
#else /* CONFIG_SSB_EMBEDDED */
static inline int ssb_watchdog_register(struct ssb_bus *bus)
{
return 0;
}
#endif /* CONFIG_SSB_EMBEDDED */
#endif /* LINUX_SSB_PRIVATE_H_ */

2
include/linux/ssb/ssb.h
View File

@ -8,6 +8,7 @@
#include <linux/pci.h>
#include <linux/mod_devicetable.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/ssb/ssb_regs.h>
@ -432,6 +433,7 @@ struct ssb_bus {
#ifdef CONFIG_SSB_EMBEDDED
/* Lock for GPIO register access. */
spinlock_t gpio_lock;
struct platform_device *watchdog;
#endif /* EMBEDDED */
/* Internal-only stuff follows. Do not touch. */