diff options
Diffstat (limited to 'arch/x86/platform')
| -rw-r--r-- | arch/x86/platform/intel-mid/device_libs/platform_wdt.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/arch/x86/platform/intel-mid/device_libs/platform_wdt.c b/arch/x86/platform/intel-mid/device_libs/platform_wdt.c index de73413..4f96cd0 100644 --- a/arch/x86/platform/intel-mid/device_libs/platform_wdt.c +++ b/arch/x86/platform/intel-mid/device_libs/platform_wdt.c @@ -14,7 +14,9 @@ #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/platform_data/intel-mid_wdt.h> + #include <asm/intel-mid.h> +#include <asm/intel_scu_ipc.h> #include <asm/io_apic.h> #define TANGIER_EXT_TIMER0_MSI 15 @@ -50,14 +52,34 @@ static struct intel_mid_wdt_pdata tangier_pdata = { .probe = tangier_probe, }; -static int __init register_mid_wdt(void) +static int wdt_scu_status_change(struct notifier_block *nb, + unsigned long code, void *data) { - if (intel_mid_identify_cpu() == INTEL_MID_CPU_CHIP_TANGIER) { - wdt_dev.dev.platform_data = &tangier_pdata; - return platform_device_register(&wdt_dev); + if (code == SCU_DOWN) { + platform_device_unregister(&wdt_dev); + return 0; } - return -ENODEV; + return platform_device_register(&wdt_dev); } +static struct notifier_block wdt_scu_notifier = { + .notifier_call = wdt_scu_status_change, +}; + +static int __init register_mid_wdt(void) +{ + if (intel_mid_identify_cpu() != INTEL_MID_CPU_CHIP_TANGIER) + return -ENODEV; + + wdt_dev.dev.platform_data = &tangier_pdata; + + /* + * We need to be sure that the SCU IPC is ready before watchdog device + * can be registered: + */ + intel_scu_notifier_add(&wdt_scu_notifier); + + return 0; +} rootfs_initcall(register_mid_wdt); |
