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authorFrederic Barrat <fbarrat@linux.vnet.ibm.com>2016-03-21 14:32:48 -0500
committerMichael Ellerman <mpe@ellerman.id.au>2016-04-22 21:45:44 +1000
commite009a7e858fed215cb4eed5174a31cadd42d8797 (patch)
tree374b3df8a670dfbc72c4eb960f6b488a916958ea /Documentation/ABI/testing/sysfs-class-cxl
parentbb62bad623deb7952aef13fcbe065fde5d1f03e5 (diff)
cxl: Allow initialization on timebase sync failures
Failure to synchronize the PSL timebase currently prevents the initialization of the cxl card, thus rendering the card useless. This is too extreme for a feature which is rarely used, if at all. No hardware AFUs or software is currently using PSL timebase. This patch still tries to synchronize the PSL timebase when the card is initialized, but ignores the error if it can't. Instead, it reports a status via /sys. Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Acked-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-class-cxl')
-rw-r--r--Documentation/ABI/testing/sysfs-class-cxl8
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-cxl b/Documentation/ABI/testing/sysfs-class-cxl
index 7fd737eed38a..4ba0a2a61926 100644
--- a/Documentation/ABI/testing/sysfs-class-cxl
+++ b/Documentation/ABI/testing/sysfs-class-cxl
@@ -233,3 +233,11 @@ Description: read/write
0 = don't trust, the image may be different (default)
1 = trust that the image will not change.
Users: https://github.com/ibm-capi/libcxl
+
+What: /sys/class/cxl/<card>/psl_timebase_synced
+Date: March 2016
+Contact: linuxppc-dev@lists.ozlabs.org
+Description: read only
+ Returns 1 if the psl timebase register is synchronized
+ with the core timebase register, 0 otherwise.
+Users: https://github.com/ibm-capi/libcxl