From: Tabi Timur-B04825 <B04825@freescale.com>
To: Grant Likely <grant.likely@secretlab.ca>
Cc: "linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>,
Felix Radensky <felix@embedded-sol.com>
Subject: Re: Handling multiple GPIO controllers in 8xxx GPIO driver
Date: Thu, 29 Sep 2011 20:22:06 +0000 [thread overview]
Message-ID: <4E84D36D.3050200@freescale.com> (raw)
In-Reply-To: <20110929172737.GF6800@ponder.secretlab.ca>
Grant Likely wrote:
> A chained handler has an expedited path through the interrupt code for
> handling it (basically, it skips handling it at the parent controller
> and passes through to the child, but it cannot handle multiple chained
> children on a single irq input.
So you can't do a shared chained handler? If the chained handler returns=20
IRQ_NONE, the interrupt code just gives up?
Why is it called a "chained" handler? Where's the chain?
I'm trying to understand the core interrupt code, and I can't seem to find=
=20
any descriptions of it.
--=20
Timur Tabi
Linux kernel developer at Freescale=
next prev parent reply other threads:[~2011-09-29 20:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-27 13:59 Handling multiple GPIO controllers in 8xxx GPIO driver Felix Radensky
2011-09-27 18:29 ` Grant Likely
2011-09-27 22:07 ` Felix Radensky
2011-09-28 20:52 ` Tabi Timur-B04825
2011-09-29 17:27 ` Grant Likely
2011-09-29 20:22 ` Tabi Timur-B04825 [this message]
2011-09-29 21:36 ` Grant Likely
2011-09-29 20:44 ` Felix Radensky
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4E84D36D.3050200@freescale.com \
--to=b04825@freescale.com \
--cc=felix@embedded-sol.com \
--cc=grant.likely@secretlab.ca \
--cc=linuxppc-dev@ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.