Re: [PATCH v4 02/12] tpm: tpm_tis: Share common data between phys

[Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>]

On Tue, Apr 19, 2016 at 12:17:34AM +0200, Christophe Ricard wrote:
> As preliminary, split priv_data structure in common and phy specific
> structures.
> iobase field is specific to lpc bus.

You do not to explain why the split is needed. The first question I
would ask is preliminary for what? The whole commit message looks such
that not much time has been on it.

> Signed-off-by: Christophe Ricard <christophe-h.ricard-qxv4g6HH51o@public.gmane.org>
> ---
>  drivers/char/tpm/tpm_tis.c      | 129 +++++++++++++++++++++++-----------------
>  drivers/char/tpm/tpm_tis_core.h |  37 ++++++++++++
>  2 files changed, 110 insertions(+), 56 deletions(-)
>  create mode 100644 drivers/char/tpm/tpm_tis_core.h
> 
> diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
> index a6b2d46..7d5d2d2 100644
> --- a/drivers/char/tpm/tpm_tis.c
> +++ b/drivers/char/tpm/tpm_tis.c
> @@ -29,6 +29,7 @@
>  #include <linux/acpi.h>
>  #include <linux/freezer.h>
>  #include "tpm.h"
> +#include "tpm_tis_core.h"
>  
>  enum tis_access {
>  	TPM_ACCESS_VALID = 0x80,
> @@ -93,16 +94,14 @@ struct tpm_info {
>  #define	TPM_DID_VID(l)			(0x0F00 | ((l) << 12))
>  #define	TPM_RID(l)			(0x0F04 | ((l) << 12))
>  
> -struct priv_data {
> +struct tpm_tis_lpc_phy {

This is incorrect since TCG compliant TPM chip could also be wired
to SPI.

> +	struct priv_data priv;
>  	void __iomem *iobase;
> -	u16 manufacturer_id;
> -	int locality;
> -	int irq;
> -	bool irq_tested;
> -	wait_queue_head_t int_queue;
> -	wait_queue_head_t read_queue;
>  };
>  
> +#define to_tpm_tis_lpc_phy(data) container_of(data, struct tpm_tis_lpc_phy,\
> +					      priv)
> +
>  #if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
>  static int has_hid(struct acpi_device *dev, const char *hid)
>  {
> @@ -133,9 +132,10 @@ static inline int is_itpm(struct acpi_device *dev)
>  static int wait_startup(struct tpm_chip *chip, int l)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	unsigned long stop = jiffies + chip->timeout_a;
>  	do {
> -		if (ioread8(priv->iobase + TPM_ACCESS(l)) &
> +		if (ioread8(phy->iobase + TPM_ACCESS(l)) &
>  		    TPM_ACCESS_VALID)
>  			return 0;
>  		msleep(TPM_TIMEOUT);
> @@ -146,8 +146,9 @@ static int wait_startup(struct tpm_chip *chip, int l)
>  static int check_locality(struct tpm_chip *chip, int l)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  
> -	if ((ioread8(priv->iobase + TPM_ACCESS(l)) &
> +	if ((ioread8(phy->iobase + TPM_ACCESS(l)) &
>  	     (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
>  	    (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID))
>  		return priv->locality = l;
> @@ -158,17 +159,19 @@ static int check_locality(struct tpm_chip *chip, int l)
>  static void release_locality(struct tpm_chip *chip, int l, int force)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  
> -	if (force || (ioread8(priv->iobase + TPM_ACCESS(l)) &
> +	if (force || (ioread8(phy->iobase + TPM_ACCESS(l)) &
>  		      (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) ==
>  	    (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID))
>  		iowrite8(TPM_ACCESS_ACTIVE_LOCALITY,
> -			 priv->iobase + TPM_ACCESS(l));
> +			 phy->iobase + TPM_ACCESS(l));
>  }
>  
>  static int request_locality(struct tpm_chip *chip, int l)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	unsigned long stop, timeout;
>  	long rc;
>  
> @@ -176,7 +179,7 @@ static int request_locality(struct tpm_chip *chip, int l)
>  		return l;
>  
>  	iowrite8(TPM_ACCESS_REQUEST_USE,
> -		 priv->iobase + TPM_ACCESS(l));
> +		 phy->iobase + TPM_ACCESS(l));
>  
>  	stop = jiffies + chip->timeout_a;
>  
> @@ -210,23 +213,26 @@ again:
>  static u8 tpm_tis_status(struct tpm_chip *chip)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  
> -	return ioread8(priv->iobase +
> +	return ioread8(phy->iobase +
>  		       TPM_STS(priv->locality));
>  }
>  
>  static void tpm_tis_ready(struct tpm_chip *chip)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  
>  	/* this causes the current command to be aborted */
>  	iowrite8(TPM_STS_COMMAND_READY,
> -		 priv->iobase + TPM_STS(priv->locality));
> +		 phy->iobase + TPM_STS(priv->locality));
>  }
>  
>  static int get_burstcount(struct tpm_chip *chip)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	unsigned long stop;
>  	int burstcnt;
>  
> @@ -234,9 +240,9 @@ static int get_burstcount(struct tpm_chip *chip)
>  	/* which timeout value, spec has 2 answers (c & d) */
>  	stop = jiffies + chip->timeout_d;
>  	do {
> -		burstcnt = ioread8(priv->iobase +
> +		burstcnt = ioread8(phy->iobase +
>  				   TPM_STS(priv->locality) + 1);
> -		burstcnt += ioread8(priv->iobase +
> +		burstcnt += ioread8(phy->iobase +
>  				    TPM_STS(priv->locality) +
>  				    2) << 8;
>  		if (burstcnt)
> @@ -249,6 +255,7 @@ static int get_burstcount(struct tpm_chip *chip)
>  static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	int size = 0, burstcnt;
>  	while (size < count &&
>  	       wait_for_tpm_stat(chip,
> @@ -258,7 +265,7 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
>  	       == 0) {
>  		burstcnt = get_burstcount(chip);
>  		for (; burstcnt > 0 && size < count; burstcnt--)
> -			buf[size++] = ioread8(priv->iobase +
> +			buf[size++] = ioread8(phy->iobase +
>  					      TPM_DATA_FIFO(priv->locality));
>  	}
>  	return size;
> @@ -323,6 +330,7 @@ MODULE_PARM_DESC(itpm, "Force iTPM workarounds (found on some Lenovo laptops)");
>  static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	int rc, status, burstcnt;
>  	size_t count = 0;
>  
> @@ -343,7 +351,7 @@ static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
>  	while (count < len - 1) {
>  		burstcnt = get_burstcount(chip);
>  		for (; burstcnt > 0 && count < len - 1; burstcnt--) {
> -			iowrite8(buf[count], priv->iobase +
> +			iowrite8(buf[count], phy->iobase +
>  				 TPM_DATA_FIFO(priv->locality));
>  			count++;
>  		}
> @@ -359,7 +367,7 @@ static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
>  
>  	/* write last byte */
>  	iowrite8(buf[count],
> -		 priv->iobase + TPM_DATA_FIFO(priv->locality));
> +		 phy->iobase + TPM_DATA_FIFO(priv->locality));
>  	wait_for_tpm_stat(chip, TPM_STS_VALID, chip->timeout_c,
>  			  &priv->int_queue, false);
>  	status = tpm_tis_status(chip);
> @@ -379,14 +387,15 @@ out_err:
>  static void disable_interrupts(struct tpm_chip *chip)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	u32 intmask;
>  
>  	intmask =
> -	    ioread32(priv->iobase +
> +	    ioread32(phy->iobase +
>  		     TPM_INT_ENABLE(priv->locality));
>  	intmask &= ~TPM_GLOBAL_INT_ENABLE;
>  	iowrite32(intmask,
> -		  priv->iobase + TPM_INT_ENABLE(priv->locality));
> +		  phy->iobase + TPM_INT_ENABLE(priv->locality));
>  	devm_free_irq(&chip->dev, priv->irq, chip);
>  	priv->irq = 0;
>  	chip->flags &= ~TPM_CHIP_FLAG_IRQ;
> @@ -400,6 +409,7 @@ static void disable_interrupts(struct tpm_chip *chip)
>  static int tpm_tis_send_main(struct tpm_chip *chip, u8 *buf, size_t len)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	int rc;
>  	u32 ordinal;
>  	unsigned long dur;
> @@ -410,7 +420,7 @@ static int tpm_tis_send_main(struct tpm_chip *chip, u8 *buf, size_t len)
>  
>  	/* go and do it */
>  	iowrite8(TPM_STS_GO,
> -		 priv->iobase + TPM_STS(priv->locality));
> +		 phy->iobase + TPM_STS(priv->locality));
>  
>  	if (chip->flags & TPM_CHIP_FLAG_IRQ) {
>  		ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
> @@ -436,8 +446,8 @@ out_err:
>  
>  static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len)
>  {
> -	int rc, irq;
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	int rc, irq;
>  
>  	if (!(chip->flags & TPM_CHIP_FLAG_IRQ) || priv->irq_tested)
>  		return tpm_tis_send_main(chip, buf, len);
> @@ -472,10 +482,11 @@ static bool tpm_tis_update_timeouts(struct tpm_chip *chip,
>  				    unsigned long *timeout_cap)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	int i;
>  	u32 did_vid;
>  
> -	did_vid = ioread32(priv->iobase + TPM_DID_VID(0));
> +	did_vid = ioread32(phy->iobase + TPM_DID_VID(0));
>  
>  	for (i = 0; i != ARRAY_SIZE(vendor_timeout_overrides); i++) {
>  		if (vendor_timeout_overrides[i].did_vid != did_vid)
> @@ -496,6 +507,7 @@ static bool tpm_tis_update_timeouts(struct tpm_chip *chip,
>  static int probe_itpm(struct tpm_chip *chip)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	int rc = 0;
>  	u8 cmd_getticks[] = {
>  		0x00, 0xc1, 0x00, 0x00, 0x00, 0x0a,
> @@ -503,7 +515,7 @@ static int probe_itpm(struct tpm_chip *chip)
>  	};
>  	size_t len = sizeof(cmd_getticks);
>  	bool rem_itpm = itpm;
> -	u16 vendor = ioread16(priv->iobase + TPM_DID_VID(0));
> +	u16 vendor = ioread16(phy->iobase + TPM_DID_VID(0));
>  
>  	/* probe only iTPMS */
>  	if (vendor != TPM_VID_INTEL)
> @@ -565,10 +577,11 @@ static irqreturn_t tis_int_handler(int dummy, void *dev_id)
>  {
>  	struct tpm_chip *chip = dev_id;
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	u32 interrupt;
>  	int i;
>  
> -	interrupt = ioread32(priv->iobase +
> +	interrupt = ioread32(phy->iobase +
>  			     TPM_INT_STATUS(priv->locality));
>  
>  	if (interrupt == 0)
> @@ -588,9 +601,9 @@ static irqreturn_t tis_int_handler(int dummy, void *dev_id)
>  
>  	/* Clear interrupts handled with TPM_EOI */
>  	iowrite32(interrupt,
> -		  priv->iobase +
> +		  phy->iobase +
>  		  TPM_INT_STATUS(priv->locality));
> -	ioread32(priv->iobase + TPM_INT_STATUS(priv->locality));
> +	ioread32(phy->iobase + TPM_INT_STATUS(priv->locality));
>  	return IRQ_HANDLED;
>  }
>  
> @@ -602,6 +615,7 @@ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask,
>  				    int flags, int irq)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	u8 original_int_vec;
>  
>  	if (devm_request_irq(&chip->dev, irq, tis_int_handler, flags,
> @@ -612,19 +626,19 @@ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask,
>  	}
>  	priv->irq = irq;
>  
> -	original_int_vec = ioread8(priv->iobase +
> +	original_int_vec = ioread8(phy->iobase +
>  				   TPM_INT_VECTOR(priv->locality));
>  	iowrite8(irq,
> -		 priv->iobase + TPM_INT_VECTOR(priv->locality));
> +		 phy->iobase + TPM_INT_VECTOR(priv->locality));
>  
>  	/* Clear all existing */
> -	iowrite32(ioread32(priv->iobase +
> +	iowrite32(ioread32(phy->iobase +
>  			   TPM_INT_STATUS(priv->locality)),
> -		  priv->iobase + TPM_INT_STATUS(priv->locality));
> +		  phy->iobase + TPM_INT_STATUS(priv->locality));
>  
>  	/* Turn on */
>  	iowrite32(intmask | TPM_GLOBAL_INT_ENABLE,
> -		  priv->iobase + TPM_INT_ENABLE(priv->locality));
> +		  phy->iobase + TPM_INT_ENABLE(priv->locality));
>  
>  	priv->irq_tested = false;
>  
> @@ -641,7 +655,7 @@ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask,
>  	 */
>  	if (!(chip->flags & TPM_CHIP_FLAG_IRQ)) {
>  		iowrite8(original_int_vec,
> -			 priv->iobase + TPM_INT_VECTOR(priv->locality));
> +			 phy->iobase + TPM_INT_VECTOR(priv->locality));
>  		return 1;
>  	}
>  
> @@ -655,10 +669,11 @@ static int tpm_tis_probe_irq_single(struct tpm_chip *chip, u32 intmask,
>  static void tpm_tis_probe_irq(struct tpm_chip *chip, u32 intmask)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	u8 original_int_vec;
>  	int i;
>  
> -	original_int_vec = ioread8(priv->iobase +
> +	original_int_vec = ioread8(phy->iobase +
>  				   TPM_INT_VECTOR(priv->locality));
>  
>  	if (!original_int_vec) {
> @@ -679,7 +694,8 @@ MODULE_PARM_DESC(interrupts, "Enable interrupts");
>  static void tpm_tis_remove(struct tpm_chip *chip)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> -	void __iomem *reg = priv->iobase + TPM_INT_ENABLE(priv->locality);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
> +	void __iomem *reg = phy->iobase + TPM_INT_ENABLE(priv->locality);
>  
>  	iowrite32(~TPM_GLOBAL_INT_ENABLE & ioread32(reg), reg);
>  	release_locality(chip, priv->locality, 1);
> @@ -691,10 +707,10 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
>  	u32 vendor, intfcaps, intmask;
>  	int rc, probe;
>  	struct tpm_chip *chip;
> -	struct priv_data *priv;
> +	struct tpm_tis_lpc_phy *phy;
>  
> -	priv = devm_kzalloc(dev, sizeof(struct priv_data), GFP_KERNEL);
> -	if (priv == NULL)
> +	phy = devm_kzalloc(dev, sizeof(struct tpm_tis_lpc_phy), GFP_KERNEL);
> +	if (phy == NULL)
>  		return -ENOMEM;
>  
>  	chip = tpmm_chip_alloc(dev, &tpm_tis);
> @@ -705,9 +721,9 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
>  	chip->acpi_dev_handle = acpi_dev_handle;
>  #endif
>  
> -	priv->iobase = devm_ioremap_resource(dev, &tpm_info->res);
> -	if (IS_ERR(priv->iobase))
> -		return PTR_ERR(priv->iobase);
> +	phy->iobase = devm_ioremap_resource(dev, &tpm_info->res);
> +	if (IS_ERR(phy->iobase))
> +		return PTR_ERR(phy->iobase);
>  
>  	/* Maximum timeouts */
>  	chip->timeout_a = TIS_TIMEOUT_A_MAX;
> @@ -715,7 +731,7 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
>  	chip->timeout_c = TIS_TIMEOUT_C_MAX;
>  	chip->timeout_d = TIS_TIMEOUT_D_MAX;
>  
> -	dev_set_drvdata(&chip->dev, priv);
> +	dev_set_drvdata(&chip->dev, &phy->priv);
>  
>  	if (wait_startup(chip, 0) != 0) {
>  		rc = -ENODEV;
> @@ -723,13 +739,13 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
>  	}
>  
>  	/* Take control of the TPM's interrupt hardware and shut it off */
> -	intmask = ioread32(priv->iobase +
> -			   TPM_INT_ENABLE(priv->locality));
> +	intmask = ioread32(phy->iobase +
> +			   TPM_INT_ENABLE(phy->priv.locality));
>  	intmask |= TPM_INTF_CMD_READY_INT | TPM_INTF_LOCALITY_CHANGE_INT |
>  		   TPM_INTF_DATA_AVAIL_INT | TPM_INTF_STS_VALID_INT;
>  	intmask &= ~TPM_GLOBAL_INT_ENABLE;
>  	iowrite32(intmask,
> -		  priv->iobase + TPM_INT_ENABLE(priv->locality));
> +		  phy->iobase + TPM_INT_ENABLE(phy->priv.locality));
>  
>  	if (request_locality(chip, 0) != 0) {
>  		rc = -ENODEV;
> @@ -740,12 +756,12 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
>  	if (rc)
>  		goto out_err;
>  
> -	vendor = ioread32(priv->iobase + TPM_DID_VID(0));
> -	priv->manufacturer_id = vendor;
> +	vendor = ioread32(phy->iobase + TPM_DID_VID(0));
> +	phy->priv.manufacturer_id = vendor;
>  
>  	dev_info(dev, "%s TPM (device-id 0x%X, rev-id %d)\n",
>  		 (chip->flags & TPM_CHIP_FLAG_TPM2) ? "2.0" : "1.2",
> -		 vendor >> 16, ioread8(priv->iobase + TPM_RID(0)));
> +		 vendor >> 16, ioread8(phy->iobase + TPM_RID(0)));
>  
>  	if (!itpm) {
>  		probe = probe_itpm(chip);
> @@ -762,8 +778,8 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
>  
>  	/* Figure out the capabilities */
>  	intfcaps =
> -	    ioread32(priv->iobase +
> -		     TPM_INTF_CAPS(priv->locality));
> +	    ioread32(phy->iobase +
> +		     TPM_INTF_CAPS(phy->priv.locality));
>  	dev_dbg(dev, "TPM interface capabilities (0x%x):\n",
>  		intfcaps);
>  	if (intfcaps & TPM_INTF_BURST_COUNT_STATIC)
> @@ -796,8 +812,8 @@ static int tpm_tis_init(struct device *dev, struct tpm_info *tpm_info,
>  	}
>  
>  	/* INTERRUPT Setup */
> -	init_waitqueue_head(&priv->read_queue);
> -	init_waitqueue_head(&priv->int_queue);
> +	init_waitqueue_head(&phy->priv.read_queue);
> +	init_waitqueue_head(&phy->priv.int_queue);
>  	if (interrupts && tpm_info->irq != -1) {
>  		if (tpm_info->irq) {
>  			tpm_tis_probe_irq_single(chip, intmask, IRQF_SHARED,
> @@ -842,22 +858,23 @@ out_err:
>  static void tpm_tis_reenable_interrupts(struct tpm_chip *chip)
>  {
>  	struct priv_data *priv = dev_get_drvdata(&chip->dev);
> +	struct tpm_tis_lpc_phy *phy = to_tpm_tis_lpc_phy(priv);
>  	u32 intmask;
>  
>  	/* reenable interrupts that device may have lost or
>  	   BIOS/firmware may have disabled */
> -	iowrite8(priv->irq, priv->iobase +
> +	iowrite8(priv->irq, phy->iobase +
>  		 TPM_INT_VECTOR(priv->locality));
>  
>  	intmask =
> -	    ioread32(priv->iobase + TPM_INT_ENABLE(priv->locality));
> +	    ioread32(phy->iobase + TPM_INT_ENABLE(priv->locality));
>  
>  	intmask |= TPM_INTF_CMD_READY_INT
>  	    | TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_DATA_AVAIL_INT
>  	    | TPM_INTF_STS_VALID_INT | TPM_GLOBAL_INT_ENABLE;
>  
>  	iowrite32(intmask,
> -		  priv->iobase + TPM_INT_ENABLE(priv->locality));
> +		  phy->iobase + TPM_INT_ENABLE(priv->locality));
>  }
>  
>  static int tpm_tis_resume(struct device *dev)
> diff --git a/drivers/char/tpm/tpm_tis_core.h b/drivers/char/tpm/tpm_tis_core.h
> new file mode 100644
> index 0000000..6de7986
> --- /dev/null
> +++ b/drivers/char/tpm/tpm_tis_core.h
> @@ -0,0 +1,37 @@
> +/*
> + * Copyright (C) 2005, 2006 IBM Corporation
> + * Copyright (C) 2014, 2015 Intel Corporation
> + *
> + * Authors:
> + * Leendert van Doorn <leendert-aZOuKsOsJu3MbYB6QlFGEg@public.gmane.org>
> + * Kylene Hall <kjhall-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
> + *
> + * Maintained by: <tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
> + *
> + * Device driver for TCG/TCPA TPM (trusted platform module).
> + * Specifications at www.trustedcomputinggroup.org
> + *
> + * This device driver implements the TPM interface as defined in
> + * the TCG TPM Interface Spec version 1.2, revision 1.0.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation, version 2 of the
> + * License.
> + */
> +
> +#ifndef __TPM_TIS_CORE_H__
> +#define __TPM_TIS_CORE_H__
> +
> +#include "tpm.h"
> +
> +struct priv_data {

I would prefix this with tpm_tis. Maybe a better name would be struct
tpm_tis_priv.

> +	u16 manufacturer_id;
> +	int locality;
> +	int irq;
> +	bool irq_tested;
> +	wait_queue_head_t int_queue;
> +	wait_queue_head_t read_queue;
> +};
> +
> +#endif
> -- 
> 2.1.4

/Jarkko

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