diff options
| author | Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> | 2014-12-12 11:46:37 -0800 |
|---|---|---|
| committer | Peter Huewe <peterhuewe@gmx.de> | 2015-01-17 14:00:10 +0100 |
| commit | 313d21eeab9282e01fdcecd40e9ca87e0953627f (patch) | |
| tree | c33c8a7d1bc2c589a7673e3781c4d3538059c896 /drivers/char/tpm/tpm.h | |
| parent | 71ed848fd791bc0b53a1b7a04f29eb9e994c7cbb (diff) | |
tpm: device class for tpm
Added own device class for TPM. Uses MISC_MAJOR:TPM_MINOR for the
first character device in order to retain backwards compatibility.
Added tpm_dev_release() back attached to the character device.
I've been running this code now for a while on my laptop (Lenovo
T430S) TrouSerS works perfectly without modifications. I don't
believe it breaks anything significantly.
The sysfs attributes that have been placed under the wrong place
and are against sysfs-rules.txt should be probably left to
stagnate under platform device directory and start defining
new sysfs attributes to the char device directory.
Guidelines for future TPM sysfs attributes should be probably
along the lines of
- Single flat set of mandatory sysfs attributes. For example,
current PPI interface is way way too rich when you only want
to use it to clear and activate the TPM.
- Define sysfs attribute if and only if there's no way to get
the value from ring-3. No attributes for TPM properties. It's
just unnecessary maintenance hurdle that we don't want.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Reviewed-by: Jasob Gunthorpe <jason.gunthorpe@obsidianresearch.com>
Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Tested-by: Scot Doyle <lkml14@scotdoyle.com>
Tested-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Diffstat (limited to 'drivers/char/tpm/tpm.h')
| -rw-r--r-- | drivers/char/tpm/tpm.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index adf6af835329..d46765b4c97e 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -23,11 +23,11 @@ #include <linux/fs.h> #include <linux/mutex.h> #include <linux/sched.h> -#include <linux/miscdevice.h> #include <linux/platform_device.h> #include <linux/io.h> #include <linux/tpm.h> #include <linux/acpi.h> +#include <linux/cdev.h> enum tpm_const { TPM_MINOR = 224, /* officially assigned */ @@ -74,7 +74,6 @@ struct tpm_vendor_specific { int region_size; int have_region; - struct miscdevice miscdev; struct list_head list; int locality; unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */ @@ -104,6 +103,9 @@ enum tpm_chip_flags { struct tpm_chip { struct device *pdev; /* Device stuff */ + struct device dev; + struct cdev cdev; + const struct tpm_class_ops *ops; unsigned int flags; @@ -326,6 +328,10 @@ struct tpm_cmd_t { tpm_cmd_params params; } __packed; +extern struct class *tpm_class; +extern dev_t tpm_devt; +extern const struct file_operations tpm_fops; + 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); @@ -346,8 +352,6 @@ extern struct tpm_chip *tpmm_chip_alloc(struct device *dev, extern int tpm_chip_register(struct tpm_chip *chip); 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 tpm_sysfs_add_device(struct tpm_chip *chip); void tpm_sysfs_del_device(struct tpm_chip *chip); |