diff options
Diffstat (limited to 'drivers/platform/x86/intel_speed_select_if/isst_if_mbox_msr.c')
| -rw-r--r-- | drivers/platform/x86/intel_speed_select_if/isst_if_mbox_msr.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/drivers/platform/x86/intel_speed_select_if/isst_if_mbox_msr.c b/drivers/platform/x86/intel_speed_select_if/isst_if_mbox_msr.c index d4bfc32546b5..89b042aecef3 100644 --- a/drivers/platform/x86/intel_speed_select_if/isst_if_mbox_msr.c +++ b/drivers/platform/x86/intel_speed_select_if/isst_if_mbox_msr.c @@ -12,6 +12,7 @@ #include <linux/pci.h> #include <linux/sched/signal.h> #include <linux/slab.h> +#include <linux/suspend.h> #include <linux/topology.h> #include <linux/uaccess.h> #include <uapi/linux/isst_if.h> @@ -128,11 +129,37 @@ static long isst_if_mbox_proc_cmd(u8 *cmd_ptr, int *write_only, int resume) if (ret) return ret; + if (!action.err && !resume && isst_if_mbox_cmd_set_req(action.mbox_cmd)) + action.err = isst_store_cmd(action.mbox_cmd->command, + action.mbox_cmd->sub_command, + action.mbox_cmd->logical_cpu, 1, + action.mbox_cmd->parameter, + action.mbox_cmd->req_data); *write_only = 0; return action.err; } + +static int isst_pm_notify(struct notifier_block *nb, + unsigned long mode, void *_unused) +{ + switch (mode) { + case PM_POST_HIBERNATION: + case PM_POST_RESTORE: + case PM_POST_SUSPEND: + isst_resume_common(); + break; + default: + break; + } + return 0; +} + +static struct notifier_block isst_pm_nb = { + .notifier_call = isst_pm_notify, +}; + #define ICPU(model) { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, } static const struct x86_cpu_id isst_if_cpu_ids[] = { @@ -166,12 +193,21 @@ static int __init isst_if_mbox_init(void) cb.offset = offsetof(struct isst_if_mbox_cmds, mbox_cmd); cb.cmd_callback = isst_if_mbox_proc_cmd; cb.owner = THIS_MODULE; - return isst_if_cdev_register(ISST_IF_DEV_MBOX, &cb); + ret = isst_if_cdev_register(ISST_IF_DEV_MBOX, &cb); + if (ret) + return ret; + + ret = register_pm_notifier(&isst_pm_nb); + if (ret) + isst_if_cdev_unregister(ISST_IF_DEV_MBOX); + + return ret; } module_init(isst_if_mbox_init) static void __exit isst_if_mbox_exit(void) { + unregister_pm_notifier(&isst_pm_nb); isst_if_cdev_unregister(ISST_IF_DEV_MBOX); } module_exit(isst_if_mbox_exit) |