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bcma: register watchdog driver

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

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 18:46:02 +01:00 committed by John W. Linville
parent a22a3114a8
commit a4855f39d4
4 changed files with 35 additions and 0 deletions
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2
drivers/bcma/bcma_private.h
View File

@ -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);

22
drivers/bcma/driver_chipcommon.c
View File

@ -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)

8
drivers/bcma/main.c
View File

@ -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)

3
include/linux/bcma/bcma_driver_chipcommon.h
View File

@ -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 */