diff --git a/drivers/platform/chrome/cros_ec_debugfs.c b/drivers/platform/chrome/cros_ec_debugfs.c index c4150871b8ed..4cc66f405760 100644 --- a/drivers/platform/chrome/cros_ec_debugfs.c +++ b/drivers/platform/chrome/cros_ec_debugfs.c @@ -47,15 +47,19 @@ * @log_mutex: mutex to protect circular buffer * @log_wq: waitqueue for log readers * @log_poll_work: recurring task to poll EC for new console log data + * @panicinfo_blob: panicinfo debugfs blob */ struct cros_ec_debugfs { struct cros_ec_dev *ec; struct dentry *dir; + /* EC log */ struct circ_buf log_buffer; struct cros_ec_command *read_msg; struct mutex log_mutex; wait_queue_head_t log_wq; struct delayed_work log_poll_work; + /* EC panicinfo */ + struct debugfs_blob_wrapper panicinfo_blob; }; /* @@ -308,6 +312,52 @@ static void cros_ec_cleanup_console_log(struct cros_ec_debugfs *debug_info) } } +static int cros_ec_create_panicinfo(struct cros_ec_debugfs *debug_info) +{ + struct cros_ec_device *ec_dev = debug_info->ec->ec_dev; + int ret; + struct cros_ec_command *msg; + int insize; + + insize = ec_dev->max_response; + + msg = devm_kzalloc(debug_info->ec->dev, + sizeof(*msg) + insize, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + msg->command = EC_CMD_GET_PANIC_INFO; + msg->insize = insize; + + ret = cros_ec_cmd_xfer(ec_dev, msg); + if (ret < 0) { + dev_warn(debug_info->ec->dev, "Cannot read panicinfo.\n"); + ret = 0; + goto free; + } + + /* No panic data */ + if (ret == 0) + goto free; + + debug_info->panicinfo_blob.data = msg->data; + debug_info->panicinfo_blob.size = ret; + + if (!debugfs_create_blob("panicinfo", + S_IFREG | S_IRUGO, + debug_info->dir, + &debug_info->panicinfo_blob)) { + ret = -ENOMEM; + goto free; + } + + return 0; + +free: + devm_kfree(debug_info->ec->dev, msg); + return ret; +} + int cros_ec_debugfs_init(struct cros_ec_dev *ec) { struct cros_ec_platform *ec_platform = dev_get_platdata(ec->dev); @@ -324,6 +374,10 @@ int cros_ec_debugfs_init(struct cros_ec_dev *ec) if (!debug_info->dir) return -ENOMEM; + ret = cros_ec_create_panicinfo(debug_info); + if (ret) + goto remove_debugfs; + ret = cros_ec_create_console_log(debug_info); if (ret) goto remove_debugfs;