From: Zhen Lei <thunder.leizhen@huawei.com>
To: Bjorn Helgaas <bhelgaas@google.com>,
linux-pci <linux-pci@vger.kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Grant Likely <grant.likely@linaro.org>,
Will Deacon <will.deacon@arm.com>,
Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
"Kumar Gala" <galak@codeaurora.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
devicetree <devicetree@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Cc: Zefan Li <lizefan@huawei.com>, Xinwei Hu <huxinwei@huawei.com>,
"Tianhong Ding" <dingtianhong@huawei.com>,
Hanjun Guo <guohanjun@huawei.com>,
"Yijing Wang" <wangyijing@huawei.com>,
Zhen Lei <thunder.leizhen@huawei.com>
Subject: [PATCH 2/2] PCI: generic: add description of property "interrupt-skip-mask"
Date: Thu, 25 Feb 2016 19:53:28 +0800 [thread overview]
Message-ID: <1456401208-10136-2-git-send-email-thunder.leizhen@huawei.com> (raw)
In-Reply-To: <1456401208-10136-1-git-send-email-thunder.leizhen@huawei.com>
Interrupt Pin register is read-only and optional. Some pci devices may use
msi/msix but leave the value of Interrupt Pin non-zero. In this case, the
driver will print information as below:
pci 0000:40:00.0: of_irq_parse_pci() failed with rc=-22
It's easily lead to misinterpret.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
---
Documentation/devicetree/bindings/pci/host-generic-pci.txt | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/devicetree/bindings/pci/host-generic-pci.txt b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
index 3f1d3fc..0f10978 100644
--- a/Documentation/devicetree/bindings/pci/host-generic-pci.txt
+++ b/Documentation/devicetree/bindings/pci/host-generic-pci.txt
@@ -70,6 +70,8 @@ Practice: Interrupt Mapping' and requires the following properties:
- interrupt-map-mask : <see aforementioned specification>
+- interrupt-skip-mask: Explicitly declare which pci devices only use msi/msix
+but leave the value of Interrupt Pin non-zero.
Example:
--
2.5.0
next prev parent reply other threads:[~2016-02-25 11:58 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-25 11:53 [PATCH 1/2] pci/of: to support explicitly declare interrupt pins unused Zhen Lei
2016-02-25 11:53 ` Zhen Lei [this message]
2016-02-25 12:20 ` [PATCH 2/2] PCI: generic: add description of property "interrupt-skip-mask" Mark Rutland
2016-02-26 7:19 ` Leizhen (ThunderTown)
2016-02-26 11:46 ` Mark Rutland
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