Register the watchdog driver to the system if this is a SoC. Using the
watchdog on a non SoC device, like a PCIe card, it will make the PCIe
card die when the timeout expired, but starting it again is not
supported.
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
drivers/bcma/bcma_private.h | 2 ++
drivers/bcma/driver_chipcommon.c | 22 ++++++++++++++++++++++
drivers/bcma/main.c | 8 ++++++++
include/linux/bcma/bcma_driver_chipcommon.h | 3 +++
4 files changed, 35 insertions(+)
diff --git a/drivers/bcma/bcma_private.h b/drivers/bcma/bcma_private.h
index 169fc58..bcb830e 100644
--- a/drivers/bcma/bcma_private.h
+++ b/drivers/bcma/bcma_private.h
@@ -84,6 +84,8 @@ extern void __exit bcma_host_pci_exit(void);
/* driver_pci.c */
u32 bcma_pcie_read(struct bcma_drv_pci *pc, u32 address);
+extern int bcma_chipco_watchdog_register(struct bcma_drv_cc *cc);
+
#ifdef CONFIG_BCMA_DRIVER_PCI_HOSTMODE
bool __devinit bcma_core_pci_is_in_hostmode(struct bcma_drv_pci *pc);
void __devinit bcma_core_pci_hostmode_init(struct bcma_drv_pci *pc);
diff --git a/drivers/bcma/driver_chipcommon.c b/drivers/bcma/driver_chipcommon.c
index 1172226..d017f25 100644
--- a/drivers/bcma/driver_chipcommon.c
+++ b/drivers/bcma/driver_chipcommon.c
@@ -12,6 +12,7 @@
#include "bcma_private.h"
#include <linux/bcm47xx_wdt.h>
#include <linux/export.h>
+#include <linux/platform_device.h>
#include <linux/bcma/bcma.h>
static inline u32 bcma_cc_write32_masked(struct bcma_drv_cc *cc, u16 offset,
@@ -87,6 +88,27 @@ static int bcma_chipco_watchdog_ticks_per_ms(struct bcma_drv_cc *cc)
}
}
+int bcma_chipco_watchdog_register(struct bcma_drv_cc *cc)
+{
+ struct bcm47xx_wdt wdt = {};
+ struct platform_device *pdev;
+
+ wdt.driver_data = cc;
+ wdt.timer_set = bcma_chipco_watchdog_timer_set_wdt;
+ wdt.timer_set_ms = bcma_chipco_watchdog_timer_set_ms_wdt;
+ wdt.max_timer_ms = bcma_chipco_watchdog_get_max_timer(cc) / cc->ticks_per_ms;
+
+ pdev = platform_device_register_data(NULL, "bcm47xx-wdt",
+ cc->core->bus->num, &wdt,
+ sizeof(wdt));
+ if (IS_ERR(pdev))
+ return PTR_ERR(pdev);
+
+ cc->watchdog = pdev;
+
+ return 0;
+}
+
void bcma_core_chipcommon_early_init(struct bcma_drv_cc *cc)
{
if (cc->early_setup_done)
diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
index a971889..debd4f1 100644
--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -165,6 +165,12 @@ static int bcma_register_cores(struct bcma_bus *bus)
}
#endif
+ if (bus->hosttype == BCMA_HOSTTYPE_SOC) {
+ err = bcma_chipco_watchdog_register(&bus->drv_cc);
+ if (err)
+ bcma_err(bus, "Error registering watchdog driver\n");
+ }
+
return 0;
}
@@ -177,6 +183,8 @@ static void bcma_unregister_cores(struct bcma_bus *bus)
if (core->dev_registered)
device_unregister(&core->dev);
}
+ if (bus->hosttype == BCMA_HOSTTYPE_SOC)
+ platform_device_unregister(bus->drv_cc.watchdog);
}
int __devinit bcma_bus_register(struct bcma_bus *bus)
diff --git a/include/linux/bcma/bcma_driver_chipcommon.h b/include/linux/bcma/bcma_driver_chipcommon.h
index 2f9b014..e513591 100644
--- a/include/linux/bcma/bcma_driver_chipcommon.h
+++ b/include/linux/bcma/bcma_driver_chipcommon.h
@@ -1,6 +1,8 @@
#ifndef LINUX_BCMA_DRIVER_CC_H_
#define LINUX_BCMA_DRIVER_CC_H_
+#include <linux/platform_device.h>
+
/** ChipCommon core registers. **/
#define BCMA_CC_ID 0x0000
#define BCMA_CC_ID_ID 0x0000FFFF
@@ -571,6 +573,7 @@ struct bcma_drv_cc {
struct bcma_serial_port serial_ports[4];
#endif /* CONFIG_BCMA_DRIVER_MIPS */
u32 ticks_per_ms;
+ struct platform_device *watchdog;
};
/* Register access */
--
1.7.10.4
