Re: [PATCH v9 17/19] tpm: Add sysfs interface to allow setting and querying the preferred locality

Expose a sysfs interface to allow user mode to set and query the preferred
locality for the TPM chip.

Signed-off-by: Ross Philipson <redacted>
---
 drivers/char/tpm/tpm-sysfs.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
index 94231f052ea7..5f4a966a4599 100644
--- a/drivers/char/tpm/tpm-sysfs.c
+++ b/drivers/char/tpm/tpm-sysfs.c

@@ -324,6 +324,34 @@ static ssize_t null_name_show(struct device *dev, struct device_attribute *attr,
 static DEVICE_ATTR_RO(null_name);
 #endif
 
+static ssize_t preferred_locality_show(struct device *dev,
+				       struct device_attribute *attr, char *buf)
+{
+	struct tpm_chip *chip = to_tpm_chip(dev);
+
+	return sprintf(buf, "%d\n", chip->pref_locality);
+}