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| author | Benjamin Rood <benjaminjrood@gmail.com> | 2015-11-02 21:42:29 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2015-11-03 05:40:35 +0100 |
| commit | b650a8806e1ba0315fbeda8b45c9e53d73abbb6f (patch) | |
| tree | 79cadea7301fdd2059b16e02b55263f3c5080a62 /fs/xfs/xfs_globals.c | |
| parent | pm80xx: do not examine registers for iButton feature if ATTO adapter (diff) | |
| download | linux-b650a8806e1ba0315fbeda8b45c9e53d73abbb6f.tar.xz linux-b650a8806e1ba0315fbeda8b45c9e53d73abbb6f.zip | |
pm80xx: wait a minimum of 500ms before issuing commands to SPCv
The documentation for the 8070 and 8072 SPCv chip explicitly states that
a minimum of 500ms must elapse before issuing commands, otherwise the
SPCv may not process them and the firmware may get into an unrecoverable
state requiring a reboot. While the Linux guys will probably think this
is 'racy', it is called out in the chip documentation and inserting this
delay makes power management function properly.
Signed-off-by: Benjamin Rood <brood@attotech.com>
Reviewed-by: Jack Wang <jinpu.wang@profitbricks.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_globals.c')
0 files changed, 0 insertions, 0 deletions