--- zzzz-none-000/linux-3.10.107/drivers/char/tpm/tpm_ibmvtpm.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/char/tpm/tpm_ibmvtpm.c	2021-02-04 17:41:59.000000000 +0000
@@ -1,7 +1,7 @@
 /*
  * Copyright (C) 2012 IBM Corporation
  *
- * Author: Ashley Lai <adlai@us.ibm.com>
+ * Author: Ashley Lai <ashleydlai@gmail.com>
  *
  * Maintained by: <tpmdd-devel@lists.sourceforge.net>
  *
@@ -98,7 +98,7 @@
 
 	if (count < len) {
 		dev_err(ibmvtpm->dev,
-			"Invalid size in recv: count=%ld, crq_size=%d\n",
+			"Invalid size in recv: count=%zd, crq_size=%d\n",
 			count, len);
 		return -EIO;
 	}
@@ -136,7 +136,7 @@
 
 	if (count > ibmvtpm->rtce_size) {
 		dev_err(ibmvtpm->dev,
-			"Invalid size in send: count=%ld, rtce_size=%d\n",
+			"Invalid size in send: count=%zd, rtce_size=%d\n",
 			count, ibmvtpm->rtce_size);
 		return -EIO;
 	}
@@ -273,8 +273,11 @@
 static int tpm_ibmvtpm_remove(struct vio_dev *vdev)
 {
 	struct ibmvtpm_dev *ibmvtpm = ibmvtpm_get_data(&vdev->dev);
+	struct tpm_chip *chip = dev_get_drvdata(ibmvtpm->dev);
 	int rc = 0;
 
+	tpm_chip_unregister(chip);
+
 	free_irq(vdev->irq, ibmvtpm);
 
 	do {
@@ -293,8 +296,6 @@
 		kfree(ibmvtpm->rtce_buf);
 	}
 
-	tpm_remove_hardware(ibmvtpm->dev);
-
 	kfree(ibmvtpm);
 
 	return 0;
@@ -415,43 +416,7 @@
 	return (status == 0);
 }
 
-static const struct file_operations ibmvtpm_ops = {
-	.owner = THIS_MODULE,
-	.llseek = no_llseek,
-	.open = tpm_open,
-	.read = tpm_read,
-	.write = tpm_write,
-	.release = tpm_release,
-};
-
-static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
-static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
-static DEVICE_ATTR(enabled, S_IRUGO, tpm_show_enabled, NULL);
-static DEVICE_ATTR(active, S_IRUGO, tpm_show_active, NULL);
-static DEVICE_ATTR(owned, S_IRUGO, tpm_show_owned, NULL);
-static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated,
-		   NULL);
-static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps_1_2, NULL);
-static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel);
-static DEVICE_ATTR(durations, S_IRUGO, tpm_show_durations, NULL);
-static DEVICE_ATTR(timeouts, S_IRUGO, tpm_show_timeouts, NULL);
-
-static struct attribute *ibmvtpm_attrs[] = {
-	&dev_attr_pubek.attr,
-	&dev_attr_pcrs.attr,
-	&dev_attr_enabled.attr,
-	&dev_attr_active.attr,
-	&dev_attr_owned.attr,
-	&dev_attr_temp_deactivated.attr,
-	&dev_attr_caps.attr,
-	&dev_attr_cancel.attr,
-	&dev_attr_durations.attr,
-	&dev_attr_timeouts.attr, NULL,
-};
-
-static struct attribute_group ibmvtpm_attr_grp = { .attrs = ibmvtpm_attrs };
-
-static const struct tpm_vendor_specific tpm_ibmvtpm = {
+static const struct tpm_class_ops tpm_ibmvtpm = {
 	.recv = tpm_ibmvtpm_recv,
 	.send = tpm_ibmvtpm_send,
 	.cancel = tpm_ibmvtpm_cancel,
@@ -459,8 +424,6 @@
 	.req_complete_mask = 0,
 	.req_complete_val = 0,
 	.req_canceled = tpm_ibmvtpm_req_canceled,
-	.attr_group = &ibmvtpm_attr_grp,
-	.miscdev = { .fops = &ibmvtpm_ops, },
 };
 
 static const struct dev_pm_ops tpm_ibmvtpm_pm_ops = {
@@ -519,7 +482,6 @@
 			dev_err(ibmvtpm->dev, "Unknown crq message type: %d\n", crq->msg);
 			return;
 		}
-		return;
 	case IBMVTPM_VALID_CMD:
 		switch (crq->msg) {
 		case VTPM_GET_RTCE_BUFFER_SIZE_RES:
@@ -606,11 +568,9 @@
 	struct tpm_chip *chip;
 	int rc = -ENOMEM, rc1;
 
-	chip = tpm_register_hardware(dev, &tpm_ibmvtpm);
-	if (!chip) {
-		dev_err(dev, "tpm_register_hardware failed\n");
-		return -ENODEV;
-	}
+	chip = tpmm_chip_alloc(dev, &tpm_ibmvtpm);
+	if (IS_ERR(chip))
+		return PTR_ERR(chip);
 
 	ibmvtpm = kzalloc(sizeof(struct ibmvtpm_dev), GFP_KERNEL);
 	if (!ibmvtpm) {
@@ -681,7 +641,7 @@
 	if (rc)
 		goto init_irq_cleanup;
 
-	return rc;
+	return tpm_chip_register(chip);
 init_irq_cleanup:
 	do {
 		rc1 = plpar_hcall_norets(H_FREE_CRQ, vio_dev->unit_address);
@@ -696,8 +656,6 @@
 		kfree(ibmvtpm);
 	}
 
-	tpm_remove_hardware(dev);
-
 	return rc;
 }