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author | Stewart Smith <stewart@linux.vnet.ibm.com> | 2015-07-16 14:12:39 +1000 |
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committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2015-07-16 14:12:39 +1000 |
commit | 2f6c3d6753d5d80643802164864a9502d7bd0acb (patch) | |
tree | 82581bf089e98c59eb590b529927dad8f38c2dc1 /doc | |
parent | a561cf7b9c93de3a710a26ad4bfe3e026d6ab8c6 (diff) | |
download | talos-skiboot-2f6c3d6753d5d80643802164864a9502d7bd0acb.tar.gz talos-skiboot-2f6c3d6753d5d80643802164864a9502d7bd0acb.zip |
Add OPAL_READ_TPO and OPAL_WRITE_TPO documentation
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'doc')
-rw-r--r-- | doc/opal-api/opal-read-write-tpo-103-104.txt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/doc/opal-api/opal-read-write-tpo-103-104.txt b/doc/opal-api/opal-read-write-tpo-103-104.txt new file mode 100644 index 00000000..0040615a --- /dev/null +++ b/doc/opal-api/opal-read-write-tpo-103-104.txt @@ -0,0 +1,15 @@ +OPAL_READ_TPO and OPAL_WRITE_TPO +-------------------------------- + +TPO is a Timed Power On facility. + +It is an OPTIONAL part of the OPAL spec. + +If a platform supports Timed Power On (TPO), the RTC node in the device tree (itself under the "ibm,opal" node will have the has-tpo property: + +rtc { + compatible = "ibm,opal-rtc"; + has-tpo; +}; + +If the "has-tpo" proprety is *NOT* present then OPAL does *NOT* support TPO. |