LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Thierry Reding <thierry.reding@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
	Jassi Brar <jassisinghbrar@gmail.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>,
	Mikko Perttunen <mperttunen@nvidia.com>,
	Jon Hunter <jonathanh@nvidia.com>, Timo Alho <talho@nvidia.com>,
	Pekka Pessi <ppessi@nvidia.com>,
	Mika Liljeberg <mliljeberg@nvidia.com>,
	linux-tegra@vger.kernel.org, linux-serial@vger.kernel.org,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/9] mailbox: Allow multiple controllers per device
Date: Fri, 26 Oct 2018 13:16:31 +0200	[thread overview]
Message-ID: <20181026111638.10759-3-thierry.reding@gmail.com> (raw)
In-Reply-To: <20181026111638.10759-1-thierry.reding@gmail.com>

From: Mikko Perttunen <mperttunen@nvidia.com>

Look through the whole controller list when mapping device tree
phandles to controllers instead of stopping at the first one.

Each controller is intended to only contain one kind of mailbox,
but some devices (like Tegra HSP) implement multiple kinds and use
the same device tree node for all of them. As such, we need to allow
multiple mbox_controllers per device tree node.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
---
 drivers/mailbox/mailbox.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c
index 0eaf21259874..f34820bcf33c 100644
--- a/drivers/mailbox/mailbox.c
+++ b/drivers/mailbox/mailbox.c
@@ -335,7 +335,8 @@ struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index)
 	list_for_each_entry(mbox, &mbox_cons, node)
 		if (mbox->dev->of_node == spec.np) {
 			chan = mbox->of_xlate(mbox, &spec);
-			break;
+			if (!IS_ERR(chan))
+				break;
 		}
 
 	of_node_put(spec.np);
-- 
2.19.1


  parent reply	other threads:[~2018-10-26 11:17 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-26 11:16 [PATCH 0/9] serial: Add Tegra Combined UART driver Thierry Reding
2018-10-26 11:16 ` [PATCH 1/9] mailbox: Support blocking transfers in atomic context Thierry Reding
2018-10-26 11:16 ` Thierry Reding [this message]
2018-10-26 11:16 ` [PATCH 3/9] dt-bindings: tegra186-hsp: Add shared interrupts Thierry Reding
2018-10-26 11:16 ` [PATCH 4/9] mailbox: tegra-hsp: Add support for shared mailboxes Thierry Reding
2018-10-29 10:04   ` Pekka Pessi
2018-10-29 10:39     ` Thierry Reding
2018-10-29 12:25       ` Pekka Pessi
2018-10-29 13:16         ` Thierry Reding
2018-10-30 16:15           ` Pekka Pessi
2018-10-26 11:16 ` [PATCH 5/9] mailbox: tegra-hsp: Add suspend/resume support Thierry Reding
2018-10-26 11:16 ` [PATCH 6/9] dt-bindings: serial: Add bindings for nvidia,tegra194-tcu Thierry Reding
2018-10-26 11:16 ` [PATCH 7/9] serial: Add Tegra Combined UART driver Thierry Reding
2018-11-09 17:05   ` Greg Kroah-Hartman
2018-11-12 15:30     ` Thierry Reding
2018-11-12 18:03       ` Greg Kroah-Hartman
2018-10-26 11:16 ` [PATCH 8/9] arm64: tegra: Add nodes for TCU on Tegra194 Thierry Reding
2018-10-26 11:16 ` [PATCH 9/9] arm64: tegra: Mark TCU as primary serial port on Tegra194 P2888 Thierry Reding
2018-10-29  9:04 ` [PATCH 0/9] serial: Add Tegra Combined UART driver Pekka Pessi
2018-10-29 10:11   ` Thierry Reding

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=20181026111638.10759-3-thierry.reding@gmail.com \
    --to=thierry.reding@gmail.com \
    --cc=devicetree@vger.kernel.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=jassisinghbrar@gmail.com \
    --cc=jonathanh@nvidia.com \
    --cc=jslaby@suse.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-serial@vger.kernel.org \
    --cc=linux-tegra@vger.kernel.org \
    --cc=mliljeberg@nvidia.com \
    --cc=mperttunen@nvidia.com \
    --cc=ppessi@nvidia.com \
    --cc=talho@nvidia.com \
    --subject='Re: [PATCH 2/9] mailbox: Allow multiple controllers per device' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).