From: Andrew Jeffery <andrew@aj.id.au>
To: Joel Stanley <joel@jms.id.au>, Patrick Williams <patrick@stwcx.xyz>
Cc: OpenBMC <openbmc@lists.ozlabs.org>
Subject: GPIO offsets used by userspace
Date: Mon, 30 Jan 2017 12:04:40 +1030 [thread overview]
Message-ID: <1485740080.4137.21.camel@aj.id.au> (raw)
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Hi all,
Just a heads up that when the linked patch is pulled into the OpenBMC
kernel it will break our userspace. We will need to synchronise the
kernel bump with the fixes for the machine configs to update the magic
GPIO offset number.
https://lkml.org/lkml/2017/1/26/786
The magic offset is essentially 512-(ngpios) (I don't know why, but
that's the behaviour), and this now varies between AST2400 and AST2500
systems due to the AST2500 having an extra bank, and also because the
AST2400 has a "hole" at the end of its GPIO number space.
Cheers,
Andrew
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next reply other threads:[~2017-01-30 1:34 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-30 1:34 Andrew Jeffery [this message]
2017-01-31 0:25 ` GPIO offsets used by userspace Joel Stanley
2017-01-31 0:50 ` Hergert, Nolan
2017-01-31 1:12 ` Andrew Jeffery
2017-01-31 1:23 ` Hergert, Nolan
2017-01-31 18:06 ` Patrick Williams
2017-01-31 1:15 ` Andrew Jeffery
2017-01-31 22:15 ` Xo Wang
2017-01-31 23:25 ` Joel Stanley
2017-02-01 1:26 ` Xo Wang
2017-02-01 2:20 ` Andrew Jeffery
2017-02-07 1:41 ` Andrew Jeffery
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