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@xxxxxxxxxx>
---
drivers/ssb/embedded.c | 35 +++++++++++++++++++++++++++++++++++
drivers/ssb/main.c | 8 ++++++++
drivers/ssb/ssb_private.h | 10 ++++++++++
include/linux/ssb/ssb.h | 2 ++
4 files changed, 55 insertions(+)
diff --git a/drivers/ssb/embedded.c b/drivers/ssb/embedded.c
index 9ef124f..bb18d76 100644
--- a/drivers/ssb/embedded.c
+++ b/drivers/ssb/embedded.c
@@ -4,11 +4,13 @@
*
* Copyright 2005-2008, Broadcom Corporation
* Copyright 2006-2008, Michael Buesch <m@xxxxxxx>
+ * Copyright 2012, Hauke Mehrtens <hauke@xxxxxxxxxx>
*
* 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;
diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index df0f145..58c7da2 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -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);
diff --git a/drivers/ssb/ssb_private.h b/drivers/ssb/ssb_private.h
index 50ea028..8942db1 100644
--- a/drivers/ssb/ssb_private.h
+++ b/drivers/ssb/ssb_private.h
@@ -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_ */
diff --git a/include/linux/ssb/ssb.h b/include/linux/ssb/ssb.h
index bb674c0..1f64e3f 100644
--- a/include/linux/ssb/ssb.h
+++ b/include/linux/ssb/ssb.h
@@ -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. */
--
1.7.10.4
--
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