greybus: interface: retry enumeration of UniPro-only modules

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Greybus modules will sometimes fail to send the mailbox poke and
erroneously be enumerated as UniPro-only modules. The root cause for
this on the module side is not fully understand, but it seems that this
may be due to "the bootrom bug:" a known problem with the bootrom where
linkup will occasionally fail because of a race condition.

Before the new hotplug code was implemented in the firmware, the SVC
would retry enumeration of modules that did not send the mailbox poke;
this patch ports that functionality to the AP.

Signed-off-by: Jeffrey Carlyle <jcarlyle@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

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This commit is contained in:

Jeffrey Carlyle 2016-05-18 18:55:13 -07:00 • committed by Greg Kroah-Hartman

parent 9bc63b7ff5

commit e16715c135

2 changed files with 22 additions and 2 deletions

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3

drivers/staging/greybus/interface.c

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21

drivers/staging/greybus/module.c

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