[PATCH v5 7/7] tpm: create TPM 2.0 devices using own device class

[Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>]

Added own class for TPM devices that is used for TPM 2.0 and onwards.
For TPM1 old device structure is kept for backwards compatibility.

Each struct tpm_chip represents a character device that is associated
to the tpm device class.

Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
 drivers/char/tpm/tpm-chip.c         | 14 +++++--
 drivers/char/tpm/tpm-dev.c          | 77 ++++++++++++++++++++++++++++++++++---
 drivers/char/tpm/tpm-interface.c    | 51 +++++++++++++++++-------
 drivers/char/tpm/tpm-sysfs.c        |  6 +--
 drivers/char/tpm/tpm.h              | 16 +++++++-
 drivers/char/tpm/tpm_atmel.c        | 14 +++----
 drivers/char/tpm/tpm_crb.c          |  4 +-
 drivers/char/tpm/tpm_i2c_atmel.c    | 16 ++++----
 drivers/char/tpm/tpm_i2c_infineon.c |  6 +--
 drivers/char/tpm/tpm_i2c_nuvoton.c  | 22 +++++------
 drivers/char/tpm/tpm_i2c_stm_st33.c |  6 +--
 drivers/char/tpm/tpm_infineon.c     | 22 +++++------
 drivers/char/tpm/tpm_nsc.c          | 20 +++++-----
 drivers/char/tpm/tpm_ppi.c          |  4 +-
 drivers/char/tpm/tpm_tis.c          | 12 +++---
 15 files changed, 199 insertions(+), 91 deletions(-)

diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 9d2038b..9cc3ccf 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -45,7 +45,7 @@ struct tpm_chip *tpm_chip_find_get(int chip_num)
 		if (chip_num != TPM_ANY_NUM && chip_num != pos->dev_num)
 			continue;
 
-		if (try_module_get(pos->dev->driver->owner)) {
+		if (try_module_get(pos->pdev->driver->owner)) {
 			chip = pos;
 			break;
 		}
@@ -111,7 +111,7 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
 	scnprintf(chip->devname, sizeof(chip->devname), "%s%d", "tpm",
 		  chip->dev_num);
 
-	chip->dev = dev;
+	chip->pdev = dev;
 	devm_add_action(dev, tpmm_chip_remove, chip);
 	dev_set_drvdata(dev, chip);
 
@@ -140,7 +140,10 @@ int tpm_chip_register(struct tpm_chip *chip)
 {
 	int rc;
 
-	rc = tpm_dev_add_device(chip);
+	if (chip->flags & TPM_CHIP_FLAG_TPM2)
+		rc = tpm2_dev_add_device(chip);
+	else
+		rc = tpm_dev_add_device(chip);
 	if (rc)
 		return rc;
 
@@ -198,6 +201,9 @@ void tpm_chip_unregister(struct tpm_chip *chip)
 		tpm_sysfs_del_device(chip);
 	}
 
-	tpm_dev_del_device(chip);
+	if (chip->flags & TPM_CHIP_FLAG_TPM2)
+		tpm2_dev_del_device(chip);
+	else
+		tpm_dev_del_device(chip);
 }
 EXPORT_SYMBOL_GPL(tpm_chip_unregister);
diff --git a/drivers/char/tpm/tpm-dev.c b/drivers/char/tpm/tpm-dev.c
index d9b774e..8c4ab94 100644
--- a/drivers/char/tpm/tpm-dev.c
+++ b/drivers/char/tpm/tpm-dev.c
@@ -22,6 +22,8 @@
 #include <linux/uaccess.h>
 #include "tpm.h"
 
+static dev_t tpm_devt;
+
 struct file_priv {
 	struct tpm_chip *chip;
 
@@ -63,7 +65,7 @@ static int tpm_open(struct inode *inode, struct file *file)
 	 * by the check of is_open variable, which is protected
 	 * by driver_lock. */
 	if (test_and_set_bit(0, &chip->is_open)) {
-		dev_dbg(chip->dev, "Another process owns this TPM\n");
+		dev_dbg(chip->pdev, "Another process owns this TPM\n");
 		return -EBUSY;
 	}
 
@@ -81,7 +83,7 @@ static int tpm_open(struct inode *inode, struct file *file)
 	INIT_WORK(&priv->work, timeout_work);
 
 	file->private_data = priv;
-	get_device(chip->dev);
+	get_device(chip->pdev);
 	return 0;
 }
 
@@ -168,7 +170,7 @@ static int tpm_release(struct inode *inode, struct file *file)
 	file->private_data = NULL;
 	atomic_set(&priv->data_pending, 0);
 	clear_bit(0, &priv->chip->is_open);
-	put_device(priv->chip->dev);
+	put_device(priv->chip->pdev);
 	kfree(priv);
 	return 0;
 }
@@ -193,12 +195,12 @@ int tpm_dev_add_device(struct tpm_chip *chip)
 		chip->vendor.miscdev.minor = MISC_DYNAMIC_MINOR;
 
 	chip->vendor.miscdev.name = chip->devname;
-	chip->vendor.miscdev.parent = chip->dev;
+	chip->vendor.miscdev.parent = chip->pdev;
 
 	rc = misc_register(&chip->vendor.miscdev);
 	if (rc) {
 		chip->vendor.miscdev.name = NULL;
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"unable to misc_register %s, minor %d err=%d\n",
 			chip->vendor.miscdev.name,
 			chip->vendor.miscdev.minor, rc);
@@ -211,3 +213,68 @@ void tpm_dev_del_device(struct tpm_chip *chip)
 	if (chip->vendor.miscdev.name)
 		misc_deregister(&chip->vendor.miscdev);
 }
+
+static void tpm_dev_release(struct device *dev)
+{
+}
+
+int tpm2_dev_add_device(struct tpm_chip *chip)
+{
+	int rc;
+
+	chip->dev.parent = chip->pdev;
+	chip->dev.class = tpm_class;
+	chip->dev.release = tpm_dev_release;
+	chip->dev.devt = MKDEV(MAJOR(tpm_devt), chip->dev_num);
+
+	dev_set_name(&chip->dev, "tpm%d", chip->dev_num);
+
+	cdev_init(&chip->cdev, &tpm_fops);
+
+	chip->cdev.owner = chip->pdev->driver->owner;
+
+	rc = device_register(&chip->dev);
+	if (rc) {
+
+		dev_err(chip->pdev,
+			"tpm: registering %s failed with %d\n",
+			chip->devname, rc);
+		put_device(&chip->dev);
+		return rc;
+	}
+
+	rc = cdev_add(&chip->cdev, chip->dev.devt, 1);
+	if (rc) {
+		dev_err(&chip->dev, "adding cdev for %s failed with %d\n",
+			chip->devname, rc);
+		device_unregister(&chip->dev);
+		put_device(&chip->dev);
+		return rc;
+	}
+
+	return 0;
+}
+
+void tpm2_dev_del_device(struct tpm_chip *chip)
+{
+	if (get_device(&chip->dev) != NULL) {
+		cdev_del(&chip->cdev);
+		device_unregister(&chip->dev);
+		put_device(&chip->dev);
+	}
+}
+
+void __init tpm_dev_init(void)
+{
+	int rc;
+
+	rc = alloc_chrdev_region(&tpm_devt, 0, TPM_NUM_DEVICES, "tpm");
+	if (rc < 0)
+		pr_err("tpm: failed to allocate char dev region\n");
+}
+
+void __exit tpm_dev_exit(void)
+{
+	if (tpm_devt)
+		unregister_chrdev_region(tpm_devt, TPM_NUM_DEVICES);
+}
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index a98532f..41426fb 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -38,6 +38,8 @@
 #define TPM_PROTECTED_COMMAND 0x00
 #define TPM_CONNECTION_COMMAND 0x40
 
+struct class *tpm_class;
+
 /*
  * Bug workaround - some TPM's don't flush the most
  * recently changed pcr on suspend, so force the flush
@@ -343,7 +345,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
 	if (count == 0)
 		return -ENODATA;
 	if (count > bufsiz) {
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"invalid count value %x %zx\n", count, bufsiz);
 		return -E2BIG;
 	}
@@ -352,7 +354,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
 
 	rc = chip->ops->send(chip, (u8 *) buf, count);
 	if (rc < 0) {
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"tpm_transmit: tpm_send: error %zd\n", rc);
 		goto out;
 	}
@@ -371,7 +373,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
 			goto out_recv;
 
 		if (chip->ops->req_canceled(chip, status)) {
-			dev_err(chip->dev, "Operation Canceled\n");
+			dev_err(chip->pdev, "Operation Canceled\n");
 			rc = -ECANCELED;
 			goto out;
 		}
@@ -381,14 +383,14 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
 	} while (time_before(jiffies, stop));
 
 	chip->ops->cancel(chip);
-	dev_err(chip->dev, "Operation Timed out\n");
+	dev_err(chip->pdev, "Operation Timed out\n");
 	rc = -ETIME;
 	goto out;
 
 out_recv:
 	rc = chip->ops->recv(chip, (u8 *) buf, bufsiz);
 	if (rc < 0)
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"tpm_transmit: tpm_recv: error %zd\n", rc);
 out:
 	mutex_unlock(&chip->tpm_mutex);
@@ -414,7 +416,7 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd,
 
 	err = be32_to_cpu(header->return_code);
 	if (err != 0 && desc)
-		dev_err(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
+		dev_err(chip->pdev, "A TPM error (%d) occurred %s\n", err, desc);
 
 	return err;
 }
@@ -508,7 +510,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
 	if (rc == TPM_ERR_INVALID_POSTINIT) {
 		/* The TPM is not started, we are the first to talk to it.
 		   Execute a startup command. */
-		dev_info(chip->dev, "Issuing TPM_STARTUP");
+		dev_info(chip->pdev, "Issuing TPM_STARTUP");
 		if (tpm_startup(chip, TPM_ST_CLEAR))
 			return rc;
 
@@ -520,7 +522,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
 				  NULL);
 	}
 	if (rc) {
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"A TPM error (%zd) occurred attempting to determine the timeouts\n",
 			rc);
 		goto duration;
@@ -559,7 +561,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
 
 	/* Report adjusted timeouts */
 	if (chip->vendor.timeout_adjusted) {
-		dev_info(chip->dev,
+		dev_info(chip->pdev,
 			 HW_ERR "Adjusting reported timeouts: A %lu->%luus B %lu->%luus C %lu->%luus D %lu->%luus\n",
 			 old_timeout[0], new_timeout[0],
 			 old_timeout[1], new_timeout[1],
@@ -606,7 +608,7 @@ duration:
 		chip->vendor.duration[TPM_MEDIUM] *= 1000;
 		chip->vendor.duration[TPM_LONG] *= 1000;
 		chip->vendor.duration_adjusted = true;
-		dev_info(chip->dev, "Adjusting TPM timeout parameters.");
+		dev_info(chip->pdev, "Adjusting TPM timeout parameters.");
 	}
 	return 0;
 }
@@ -772,7 +774,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
 		 * around 300ms while the self test is ongoing, keep trying
 		 * until the self test duration expires. */
 		if (rc == -ETIME) {
-			dev_info(chip->dev, HW_ERR "TPM command timed out during continue self test");
+			dev_info(chip->pdev, HW_ERR "TPM command timed out during continue self test");
 			msleep(delay_msec);
 			continue;
 		}
@@ -782,7 +784,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
 
 		rc = be32_to_cpu(cmd.header.out.return_code);
 		if (rc == TPM_ERR_DISABLED || rc == TPM_ERR_DEACTIVATED) {
-			dev_info(chip->dev,
+			dev_info(chip->pdev,
 				 "TPM is disabled/deactivated (0x%X)\n", rc);
 			/* TPM is disabled and/or deactivated; driver can
 			 * proceed and TPM does handle commands for
@@ -930,10 +932,10 @@ int tpm_pm_suspend(struct device *dev)
 	}
 
 	if (rc)
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"Error (%d) sending savestate before suspend\n", rc);
 	else if (try > 0)
-		dev_warn(chip->dev, "TPM savestate took %dms\n",
+		dev_warn(chip->pdev, "TPM savestate took %dms\n",
 			 try * TPM_TIMEOUT_RETRY);
 
 	return rc;
@@ -1014,6 +1016,27 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
 }
 EXPORT_SYMBOL_GPL(tpm_get_random);
 
+static int __init tpm_init(void)
+{
+	tpm_class = class_create(THIS_MODULE, "tpm");
+	if (IS_ERR(tpm_class)) {
+		pr_err("couldn't create tpm class\n");
+		return PTR_ERR(tpm_class);
+	}
+
+	tpm_dev_init();
+	return 0;
+}
+
+static void __exit tpm_exit(void)
+{
+	tpm_dev_exit();
+	class_destroy(tpm_class);
+}
+
+subsys_initcall(tpm_init);
+module_exit(tpm_exit);
+
 MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
 MODULE_DESCRIPTION("TPM Driver");
 MODULE_VERSION("2.0");
diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
index 8ecb052..ee66fd4 100644
--- a/drivers/char/tpm/tpm-sysfs.c
+++ b/drivers/char/tpm/tpm-sysfs.c
@@ -284,16 +284,16 @@ static const struct attribute_group tpm_dev_group = {
 int tpm_sysfs_add_device(struct tpm_chip *chip)
 {
 	int err;
-	err = sysfs_create_group(&chip->dev->kobj,
+	err = sysfs_create_group(&chip->pdev->kobj,
 				 &tpm_dev_group);
 
 	if (err)
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"failed to create sysfs attributes, %d\n", err);
 	return err;
 }
 
 void tpm_sysfs_del_device(struct tpm_chip *chip)
 {
-	sysfs_remove_group(&chip->dev->kobj, &tpm_dev_group);
+	sysfs_remove_group(&chip->pdev->kobj, &tpm_dev_group);
 }
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 076456a..97963d3 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -28,6 +28,7 @@
 #include <linux/io.h>
 #include <linux/tpm.h>
 #include <linux/acpi.h>
+#include <linux/cdev.h>
 
 enum tpm_const {
 	TPM_MINOR = 224,	/* officially assigned */
@@ -153,7 +154,11 @@ enum tpm_chip_flags {
 };
 
 struct tpm_chip {
-	struct device *dev;	/* Device stuff */
+	/* Device associations */
+	struct device *pdev;
+	struct device dev;
+	struct cdev cdev;
+
 	const struct tpm_class_ops *ops;
 	unsigned int flags;
 
@@ -180,7 +185,7 @@ struct tpm_chip {
 
 static inline void tpm_chip_put(struct tpm_chip *chip)
 {
-	module_put(chip->dev->driver->owner);
+	module_put(chip->pdev->driver->owner);
 }
 
 static inline int tpm_read_index(int base, int index)
@@ -376,6 +381,8 @@ struct tpm_cmd_t {
 	tpm_cmd_params	params;
 } __packed;
 
+extern struct class *tpm_class;
+
 ssize_t	tpm_getcap(struct device *, __be32, cap_t *, const char *);
 ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
 		     size_t bufsiz);
@@ -398,6 +405,11 @@ extern void tpm_chip_unregister(struct tpm_chip *chip);
 
 int tpm_dev_add_device(struct tpm_chip *chip);
 void tpm_dev_del_device(struct tpm_chip *chip);
+int tpm2_dev_add_device(struct tpm_chip *chip);
+void tpm2_dev_del_device(struct tpm_chip *chip);
+void tpm_dev_init(void);
+void tpm_dev_exit(void);
+
 int tpm_sysfs_add_device(struct tpm_chip *chip);
 void tpm_sysfs_del_device(struct tpm_chip *chip);
 
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
index fb2f921..387b0c0 100644
--- a/drivers/char/tpm/tpm_atmel.c
+++ b/drivers/char/tpm/tpm_atmel.c
@@ -49,7 +49,7 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 	for (i = 0; i < 6; i++) {
 		status = ioread8(chip->vendor.iobase + 1);
 		if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
-			dev_err(chip->dev, "error reading header\n");
+			dev_err(chip->pdev, "error reading header\n");
 			return -EIO;
 		}
 		*buf++ = ioread8(chip->vendor.iobase);
@@ -60,12 +60,12 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 	size = be32_to_cpu(*native_size);
 
 	if (count < size) {
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"Recv size(%d) less than available space\n", size);
 		for (; i < size; i++) {	/* clear the waiting data anyway */
 			status = ioread8(chip->vendor.iobase + 1);
 			if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
-				dev_err(chip->dev, "error reading data\n");
+				dev_err(chip->pdev, "error reading data\n");
 				return -EIO;
 			}
 		}
@@ -76,7 +76,7 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 	for (; i < size; i++) {
 		status = ioread8(chip->vendor.iobase + 1);
 		if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
-			dev_err(chip->dev, "error reading data\n");
+			dev_err(chip->pdev, "error reading data\n");
 			return -EIO;
 		}
 		*buf++ = ioread8(chip->vendor.iobase);
@@ -86,7 +86,7 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 	status = ioread8(chip->vendor.iobase + 1);
 
 	if (status & ATML_STATUS_DATA_AVAIL) {
-		dev_err(chip->dev, "data available is stuck\n");
+		dev_err(chip->pdev, "data available is stuck\n");
 		return -EIO;
 	}
 
@@ -97,9 +97,9 @@ static int tpm_atml_send(struct tpm_chip *chip, u8 *buf, size_t count)
 {
 	int i;
 
-	dev_dbg(chip->dev, "tpm_atml_send:\n");
+	dev_dbg(chip->pdev, "tpm_atml_send:\n");
 	for (i = 0; i < count; i++) {
-		dev_dbg(chip->dev, "%d 0x%x(%d)\n",  i, buf[i], buf[i]);
+		dev_dbg(chip->pdev, "%d 0x%x(%d)\n",  i, buf[i], buf[i]);
  		iowrite8(buf[i], chip->vendor.iobase);
 	}
 
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index 3b7202c..c95ddc9 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -169,7 +169,7 @@ static int crb_send(struct tpm_chip *chip, u8 *buf, size_t len)
 	cca = priv->cca;
 
 	if (len > le32_to_cpu(cca->cmd_size)) {
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"invalid command count value %x %zx\n",
 			(unsigned int) len,
 			(size_t) le32_to_cpu(cca->cmd_size));
@@ -200,7 +200,7 @@ static void crb_cancel(struct tpm_chip *chip)
 	wmb();
 
 	if (crb_do_acpi_start(chip))
-		dev_err(chip->dev, "ACPI Start failed\n");
+		dev_err(chip->pdev, "ACPI Start failed\n");
 
 	cca->cancel = 0;
 }
diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c
index 8af3b4a..dfef1ae 100644
--- a/drivers/char/tpm/tpm_i2c_atmel.c
+++ b/drivers/char/tpm/tpm_i2c_atmel.c
@@ -52,7 +52,7 @@ struct priv_data {
 static int i2c_atmel_send(struct tpm_chip *chip, u8 *buf, size_t len)
 {
 	struct priv_data *priv = chip->vendor.priv;
-	struct i2c_client *client = to_i2c_client(chip->dev);
+	struct i2c_client *client = to_i2c_client(chip->pdev);
 	s32 status;
 
 	priv->len = 0;
@@ -62,7 +62,7 @@ static int i2c_atmel_send(struct tpm_chip *chip, u8 *buf, size_t len)
 
 	status = i2c_master_send(client, buf, len);
 
-	dev_dbg(chip->dev,
+	dev_dbg(chip->pdev,
 		"%s(buf=%*ph len=%0zx) -> sts=%d\n", __func__,
 		(int)min_t(size_t, 64, len), buf, len, status);
 	return status;
@@ -71,7 +71,7 @@ static int i2c_atmel_send(struct tpm_chip *chip, u8 *buf, size_t len)
 static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 {
 	struct priv_data *priv = chip->vendor.priv;
-	struct i2c_client *client = to_i2c_client(chip->dev);
+	struct i2c_client *client = to_i2c_client(chip->pdev);
 	struct tpm_output_header *hdr =
 		(struct tpm_output_header *)priv->buffer;
 	u32 expected_len;
@@ -88,7 +88,7 @@ static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 		return -ENOMEM;
 
 	if (priv->len >= expected_len) {
-		dev_dbg(chip->dev,
+		dev_dbg(chip->pdev,
 			"%s early(buf=%*ph count=%0zx) -> ret=%d\n", __func__,
 			(int)min_t(size_t, 64, expected_len), buf, count,
 			expected_len);
@@ -97,7 +97,7 @@ static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 	}
 
 	rc = i2c_master_recv(client, buf, expected_len);
-	dev_dbg(chip->dev,
+	dev_dbg(chip->pdev,
 		"%s reread(buf=%*ph count=%0zx) -> ret=%d\n", __func__,
 		(int)min_t(size_t, 64, expected_len), buf, count,
 		expected_len);
@@ -106,13 +106,13 @@ static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 
 static void i2c_atmel_cancel(struct tpm_chip *chip)
 {
-	dev_err(chip->dev, "TPM operation cancellation was requested, but is not supported");
+	dev_err(chip->pdev, "TPM operation cancellation was requested, but is not supported");
 }
 
 static u8 i2c_atmel_read_status(struct tpm_chip *chip)
 {
 	struct priv_data *priv = chip->vendor.priv;
-	struct i2c_client *client = to_i2c_client(chip->dev);
+	struct i2c_client *client = to_i2c_client(chip->pdev);
 	int rc;
 
 	/* The TPM fails the I2C read until it is ready, so we do the entire
@@ -125,7 +125,7 @@ static u8 i2c_atmel_read_status(struct tpm_chip *chip)
 	/* Once the TPM has completed the command the command remains readable
 	 * until another command is issued. */
 	rc = i2c_master_recv(client, priv->buffer, sizeof(priv->buffer));
-	dev_dbg(chip->dev,
+	dev_dbg(chip->pdev,
 		"%s: sts=%d", __func__, rc);
 	if (rc <= 0)
 		return 0;
diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
index 03708e6..33c5f36 100644
--- a/drivers/char/tpm/tpm_i2c_infineon.c
+++ b/drivers/char/tpm/tpm_i2c_infineon.c
@@ -446,7 +446,7 @@ static int tpm_tis_i2c_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 	/* read first 10 bytes, including tag, paramsize, and result */
 	size = recv_data(chip, buf, TPM_HEADER_SIZE);
 	if (size < TPM_HEADER_SIZE) {
-		dev_err(chip->dev, "Unable to read header\n");
+		dev_err(chip->pdev, "Unable to read header\n");
 		goto out;
 	}
 
@@ -459,14 +459,14 @@ static int tpm_tis_i2c_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 	size += recv_data(chip, &buf[TPM_HEADER_SIZE],
 			  expected - TPM_HEADER_SIZE);
 	if (size < expected) {
-		dev_err(chip->dev, "Unable to read remainder of result\n");
+		dev_err(chip->pdev, "Unable to read remainder of result\n");
 		size = -ETIME;
 		goto out;
 	}
 
 	wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c, &status);
 	if (status & TPM_STS_DATA_AVAIL) {	/* retry? */
-		dev_err(chip->dev, "Error left over data\n");
+		dev_err(chip->pdev, "Error left over data\n");
 		size = -EIO;
 		goto out;
 	}
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index 09f0c46..92ee9fa 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -96,13 +96,13 @@ static s32 i2c_nuvoton_write_buf(struct i2c_client *client, u8 offset, u8 size,
 /* read TPM_STS register */
 static u8 i2c_nuvoton_read_status(struct tpm_chip *chip)
 {
-	struct i2c_client *client = to_i2c_client(chip->dev);
+	struct i2c_client *client = to_i2c_client(chip->pdev);
 	s32 status;
 	u8 data;
 
 	status = i2c_nuvoton_read_buf(client, TPM_STS, 1, &data);
 	if (status <= 0) {
-		dev_err(chip->dev, "%s() error return %d\n", __func__,
+		dev_err(chip->pdev, "%s() error return %d\n", __func__,
 			status);
 		data = TPM_STS_ERR_VAL;
 	}
@@ -127,13 +127,13 @@ static s32 i2c_nuvoton_write_status(struct i2c_client *client, u8 data)
 /* write commandReady to TPM_STS register */
 static void i2c_nuvoton_ready(struct tpm_chip *chip)
 {
-	struct i2c_client *client = to_i2c_client(chip->dev);
+	struct i2c_client *client = to_i2c_client(chip->pdev);
 	s32 status;
 
 	/* this causes the current command to be aborted */
 	status = i2c_nuvoton_write_status(client, TPM_STS_COMMAND_READY);
 	if (status < 0)
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"%s() fail to write TPM_STS.commandReady\n", __func__);
 }
 
@@ -212,7 +212,7 @@ static int i2c_nuvoton_wait_for_stat(struct tpm_chip *chip, u8 mask, u8 value,
 				return 0;
 		} while (time_before(jiffies, stop));
 	}
-	dev_err(chip->dev, "%s(%02x, %02x) -> timeout\n", __func__, mask,
+	dev_err(chip->pdev, "%s(%02x, %02x) -> timeout\n", __func__, mask,
 		value);
 	return -ETIMEDOUT;
 }
@@ -240,7 +240,7 @@ static int i2c_nuvoton_recv_data(struct i2c_client *client,
 					       &chip->vendor.read_queue) == 0) {
 		burst_count = i2c_nuvoton_get_burstcount(client, chip);
 		if (burst_count < 0) {
-			dev_err(chip->dev,
+			dev_err(chip->pdev,
 				"%s() fail to read burstCount=%d\n", __func__,
 				burst_count);
 			return -EIO;
@@ -249,12 +249,12 @@ static int i2c_nuvoton_recv_data(struct i2c_client *client,
 		rc = i2c_nuvoton_read_buf(client, TPM_DATA_FIFO_R,
 					  bytes2read, &buf[size]);
 		if (rc < 0) {
-			dev_err(chip->dev,
+			dev_err(chip->pdev,
 				"%s() fail on i2c_nuvoton_read_buf()=%d\n",
 				__func__, rc);
 			return -EIO;
 		}
-		dev_dbg(chip->dev, "%s(%d):", __func__, bytes2read);
+		dev_dbg(chip->pdev, "%s(%d):", __func__, bytes2read);
 		size += bytes2read;
 	}
 
@@ -264,7 +264,7 @@ static int i2c_nuvoton_recv_data(struct i2c_client *client,
 /* Read TPM command results */
 static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 {
-	struct device *dev = chip->dev;
+	struct device *dev = chip->pdev;
 	struct i2c_client *client = to_i2c_client(dev);
 	s32 rc;
 	int expected, status, burst_count, retries, size = 0;
@@ -334,7 +334,7 @@ static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 		break;
 	}
 	i2c_nuvoton_ready(chip);
-	dev_dbg(chip->dev, "%s() -> %d\n", __func__, size);
+	dev_dbg(chip->pdev, "%s() -> %d\n", __func__, size);
 	return size;
 }
 
@@ -347,7 +347,7 @@ static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count)
  */
 static int i2c_nuvoton_send(struct tpm_chip *chip, u8 *buf, size_t len)
 {
-	struct device *dev = chip->dev;
+	struct device *dev = chip->pdev;
 	struct i2c_client *client = to_i2c_client(dev);
 	u32 ordinal;
 	size_t count = 0;
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index b9d1a38..64ef510 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -544,7 +544,7 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
 
 	size = recv_data(chip, buf, TPM_HEADER_SIZE);
 	if (size < TPM_HEADER_SIZE) {
-		dev_err(chip->dev, "Unable to read header\n");
+		dev_err(chip->pdev, "Unable to read header\n");
 		goto out;
 	}
 
@@ -557,7 +557,7 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
 	size += recv_data(chip, &buf[TPM_HEADER_SIZE],
 					expected - TPM_HEADER_SIZE);
 	if (size < expected) {
-		dev_err(chip->dev, "Unable to read remainder of result\n");
+		dev_err(chip->pdev, "Unable to read remainder of result\n");
 		size = -ETIME;
 		goto out;
 	}
@@ -671,7 +671,7 @@ tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
 				IRQF_TRIGGER_HIGH,
 				"TPM SERIRQ management", chip);
 		if (err < 0) {
-			dev_err(chip->dev , "TPM SERIRQ signals %d not available\n",
+			dev_err(chip->pdev , "TPM SERIRQ signals %d not available\n",
 				gpio_to_irq(platform_data->io_serirq));
 			goto _irq_set;
 		}
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index dcdb671..6d49213 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -195,9 +195,9 @@ static int wait(struct tpm_chip *chip, int wait_for_bit)
 	}
 	if (i == TPM_MAX_TRIES) {	/* timeout occurs */
 		if (wait_for_bit == STAT_XFE)
-			dev_err(chip->dev, "Timeout in wait(STAT_XFE)\n");
+			dev_err(chip->pdev, "Timeout in wait(STAT_XFE)\n");
 		if (wait_for_bit == STAT_RDA)
-			dev_err(chip->dev, "Timeout in wait(STAT_RDA)\n");
+			dev_err(chip->pdev, "Timeout in wait(STAT_RDA)\n");
 		return -EIO;
 	}
 	return 0;
@@ -220,7 +220,7 @@ static void wait_and_send(struct tpm_chip *chip, u8 sendbyte)
 static void tpm_wtx(struct tpm_chip *chip)
 {
 	number_of_wtx++;
-	dev_info(chip->dev, "Granting WTX (%02d / %02d)\n",
+	dev_info(chip->pdev, "Granting WTX (%02d / %02d)\n",
 		 number_of_wtx, TPM_MAX_WTX_PACKAGES);
 	wait_and_send(chip, TPM_VL_VER);
 	wait_and_send(chip, TPM_CTRL_WTX);
@@ -231,7 +231,7 @@ static void tpm_wtx(struct tpm_chip *chip)
 
 static void tpm_wtx_abort(struct tpm_chip *chip)
 {
-	dev_info(chip->dev, "Aborting WTX\n");
+	dev_info(chip->pdev, "Aborting WTX\n");
 	wait_and_send(chip, TPM_VL_VER);
 	wait_and_send(chip, TPM_CTRL_WTX_ABORT);
 	wait_and_send(chip, 0x00);
@@ -257,7 +257,7 @@ recv_begin:
 	}
 
 	if (buf[0] != TPM_VL_VER) {
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"Wrong transport protocol implementation!\n");
 		return -EIO;
 	}
@@ -272,7 +272,7 @@ recv_begin:
 		}
 
 		if ((size == 0x6D00) && (buf[1] == 0x80)) {
-			dev_err(chip->dev, "Error handling on vendor layer!\n");
+			dev_err(chip->pdev, "Error handling on vendor layer!\n");
 			return -EIO;
 		}
 
@@ -284,7 +284,7 @@ recv_begin:
 	}
 
 	if (buf[1] == TPM_CTRL_WTX) {
-		dev_info(chip->dev, "WTX-package received\n");
+		dev_info(chip->pdev, "WTX-package received\n");
 		if (number_of_wtx < TPM_MAX_WTX_PACKAGES) {
 			tpm_wtx(chip);
 			goto recv_begin;
@@ -295,14 +295,14 @@ recv_begin:
 	}
 
 	if (buf[1] == TPM_CTRL_WTX_ABORT_ACK) {
-		dev_info(chip->dev, "WTX-abort acknowledged\n");
+		dev_info(chip->pdev, "WTX-abort acknowledged\n");
 		return size;
 	}
 
 	if (buf[1] == TPM_CTRL_ERROR) {
-		dev_err(chip->dev, "ERROR-package received:\n");
+		dev_err(chip->pdev, "ERROR-package received:\n");
 		if (buf[4] == TPM_INF_NAK)
-			dev_err(chip->dev,
+			dev_err(chip->pdev,
 				"-> Negative acknowledgement"
 				" - retransmit command!\n");
 		return -EIO;
@@ -321,7 +321,7 @@ static int tpm_inf_send(struct tpm_chip *chip, u8 * buf, size_t count)
 
 	ret = empty_fifo(chip, 1);
 	if (ret) {
-		dev_err(chip->dev, "Timeout while clearing FIFO\n");
+		dev_err(chip->pdev, "Timeout while clearing FIFO\n");
 		return -EIO;
 	}
 
diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c
index 00c5470..072c298 100644
--- a/drivers/char/tpm/tpm_nsc.c
+++ b/drivers/char/tpm/tpm_nsc.c
@@ -113,7 +113,7 @@ static int nsc_wait_for_ready(struct tpm_chip *chip)
 	}
 	while (time_before(jiffies, stop));
 
-	dev_info(chip->dev, "wait for ready failed\n");
+	dev_info(chip->pdev, "wait for ready failed\n");
 	return -EBUSY;
 }
 
@@ -129,12 +129,12 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
 		return -EIO;
 
 	if (wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0) {
-		dev_err(chip->dev, "F0 timeout\n");
+		dev_err(chip->pdev, "F0 timeout\n");
 		return -EIO;
 	}
 	if ((data =
 	     inb(chip->vendor.base + NSC_DATA)) != NSC_COMMAND_NORMAL) {
-		dev_err(chip->dev, "not in normal mode (0x%x)\n",
+		dev_err(chip->pdev, "not in normal mode (0x%x)\n",
 			data);
 		return -EIO;
 	}
@@ -143,7 +143,7 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
 	for (p = buffer; p < &buffer[count]; p++) {
 		if (wait_for_stat
 		    (chip, NSC_STATUS_OBF, NSC_STATUS_OBF, &data) < 0) {
-			dev_err(chip->dev,
+			dev_err(chip->pdev,
 				"OBF timeout (while reading data)\n");
 			return -EIO;
 		}
@@ -154,11 +154,11 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
 
 	if ((data & NSC_STATUS_F0) == 0 &&
 	(wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0)) {
-		dev_err(chip->dev, "F0 not set\n");
+		dev_err(chip->pdev, "F0 not set\n");
 		return -EIO;
 	}
 	if ((data = inb(chip->vendor.base + NSC_DATA)) != NSC_COMMAND_EOC) {
-		dev_err(chip->dev,
+		dev_err(chip->pdev,
 			"expected end of command(0x%x)\n", data);
 		return -EIO;
 	}
@@ -189,19 +189,19 @@ static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count)
 		return -EIO;
 
 	if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
-		dev_err(chip->dev, "IBF timeout\n");
+		dev_err(chip->pdev, "IBF timeout\n");
 		return -EIO;
 	}
 
 	outb(NSC_COMMAND_NORMAL, chip->vendor.base + NSC_COMMAND);
 	if (wait_for_stat(chip, NSC_STATUS_IBR, NSC_STATUS_IBR, &data) < 0) {
-		dev_err(chip->dev, "IBR timeout\n");
+		dev_err(chip->pdev, "IBR timeout\n");
 		return -EIO;
 	}
 
 	for (i = 0; i < count; i++) {
 		if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
-			dev_err(chip->dev,
+			dev_err(chip->pdev,
 				"IBF timeout (while writing data)\n");
 			return -EIO;
 		}
@@ -209,7 +209,7 @@ static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count)
 	}
 
 	if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
-		dev_err(chip->dev, "IBF timeout\n");
+		dev_err(chip->pdev, "IBF timeout\n");
 		return -EIO;
 	}
 	outb(NSC_COMMAND_EOC, chip->vendor.base + NSC_COMMAND);
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index 6acdb17..659de61 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -358,11 +358,11 @@ int tpm_add_ppi(struct tpm_chip *chip)
 
 	ACPI_FREE(obj);
 
-	return sysfs_create_group(&chip->dev->kobj, &ppi_attr_grp);
+	return sysfs_create_group(&chip->pdev->kobj, &ppi_attr_grp);
 }
 
 void tpm_remove_ppi(struct tpm_chip *chip)
 {
 	if (chip->ppi_version[0] != '\0')
-		sysfs_remove_group(&chip->dev->kobj, &ppi_attr_grp);
+		sysfs_remove_group(&chip->pdev->kobj, &ppi_attr_grp);
 }
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 4d4bff1..66780ba 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -244,7 +244,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 	/* read first 10 bytes, including tag, paramsize, and result */
 	if ((size =
 	     recv_data(chip, buf, TPM_HEADER_SIZE)) < TPM_HEADER_SIZE) {
-		dev_err(chip->dev, "Unable to read header\n");
+		dev_err(chip->pdev, "Unable to read header\n");
 		goto out;
 	}
 
@@ -257,7 +257,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 	if ((size +=
 	     recv_data(chip, &buf[TPM_HEADER_SIZE],
 		       expected - TPM_HEADER_SIZE)) < expected) {
-		dev_err(chip->dev, "Unable to read remainder of result\n");
+		dev_err(chip->pdev, "Unable to read remainder of result\n");
 		size = -ETIME;
 		goto out;
 	}
@@ -266,7 +266,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
 			  &chip->vendor.int_queue, false);
 	status = tpm_tis_status(chip);
 	if (status & TPM_STS_DATA_AVAIL) {	/* retry? */
-		dev_err(chip->dev, "Error left over data\n");
+		dev_err(chip->pdev, "Error left over data\n");
 		size = -EIO;
 		goto out;
 	}
@@ -445,7 +445,7 @@ static int probe_itpm(struct tpm_chip *chip)
 
 	rc = tpm_tis_send_data(chip, cmd_getticks, len);
 	if (rc == 0) {
-		dev_info(chip->dev, "Detected an iTPM.\n");
+		dev_info(chip->pdev, "Detected an iTPM.\n");
 		rc = 1;
 	} else
 		rc = -EFAULT;
@@ -696,7 +696,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
 			if (devm_request_irq
 			    (dev, i, tis_int_probe, IRQF_SHARED,
 			     chip->vendor.miscdev.name, chip) != 0) {
-				dev_info(chip->dev,
+				dev_info(chip->pdev,
 					 "Unable to request irq: %d for probe\n",
 					 i);
 				continue;
@@ -746,7 +746,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
 		if (devm_request_irq
 		    (dev, chip->vendor.irq, tis_int_handler, IRQF_SHARED,
 		     chip->vendor.miscdev.name, chip) != 0) {
-			dev_info(chip->dev,
+			dev_info(chip->pdev,
 				 "Unable to request irq: %d for use\n",
 				 chip->vendor.irq);
 			chip->vendor.irq = 0;
-- 
2.1.0