platform/x86: think-lmi: Add certificate as mechanism

As both password or certificate authentication are available as mechanisms
update the documentation to add certificate as an option

Update driver to return correct mechanism appropriately.

Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Link: https://lore.kernel.org/r/20241024195536.6992-2-mpearson-lenovo@squebb.ca
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

diff --git a/Documentation/ABI/testing/sysfs-class-firmware-attributes b/Documentation/ABI/testing/sysfs-class-firmware-attributes
index 9c82c7b42ff8239e7b2105c5ba28f40dc6e88453..1a8b59f5d6e3a173c4faecc8e9d719adb8d8cbff 100644 (file)
--- a/Documentation/ABI/testing/sysfs-class-firmware-attributes
+++ b/Documentation/ABI/testing/sysfs-class-firmware-attributes
@@ -193,7 +193,7 @@ Description:
 
                mechanism:
                                        The means of authentication.  This attribute is mandatory.
-                                       Only supported type currently is "password".
+                                       Supported types are "password" or "certificate".
 
                max_password_length:
                                        A file that can be read to obtain the

diff --git a/drivers/platform/x86/think-lmi.c b/drivers/platform/x86/think-lmi.c
index 727a9400d406a72c6cff4562d98d5eab27f735ec..46ab82fb2898913b81bf3c532d8108af4c5a7455 100644 (file)
--- a/drivers/platform/x86/think-lmi.c
+++ b/drivers/platform/x86/think-lmi.c
@@ -524,6 +524,10 @@ static struct kobj_attribute auth_max_pass_length = __ATTR_RO(max_password_lengt
 static ssize_t mechanism_show(struct kobject *kobj, struct kobj_attribute *attr,
                         char *buf)
 {
+       struct tlmi_pwd_setting *setting = to_tlmi_pwd_setting(kobj);
+
+       if (setting->cert_installed)
+               return sysfs_emit(buf, "certificate\n");
        return sysfs_emit(buf, "password\n");
 }
 static struct kobj_attribute auth_mechanism = __ATTR_RO(mechanism);