From: Maxime Ripard <maxime.ripard@bootlin.com>
To: Mark Rutland <mark.rutland@arm.com>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Chen-Yu Tsai <wens@csie.org>,
Maxime Ripard <maxime.ripard@bootlin.com>
Cc: devicetree@vger.kernel.org,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Arnd Bergmann <arnd@arndb.de>,
dri-devel@lists.freedesktop.org,
Georgi Djakov <georgi.djakov@linaro.org>,
Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
Yong Deng <yong.deng@magewell.com>,
Robin Murphy <robin.murphy@arm.com>,
Dave Martin <dave.martin@arm.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 1/7] dt-bindings: interconnect: Add a dma interconnect name
Date: Mon, 11 Feb 2019 16:02:49 +0100 [thread overview]
Message-ID: <43eeca13733faefe62f9facc25b8e88f7e593f61.1549897336.git-series.maxime.ripard@bootlin.com> (raw)
In-Reply-To: <cover.f2e5fbb4d21384168973fa32377a33d627768146.1549897336.git-series.maxime.ripard@bootlin.com>
The current DT bindings assume that the DMA will be performed by the
devices through their parent DT node, and rely on that assumption for the
address translation using dma-ranges.
However, some SoCs have devices that will perform DMA through another bus,
with separate address translation rules. We therefore need to express that
relationship, through the special interconnect name "dma".
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
Documentation/devicetree/bindings/interconnect/interconnect.txt | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/interconnect/interconnect.txt b/Documentation/devicetree/bindings/interconnect/interconnect.txt
index 5a3c575b387a..e69fc2d992c3 100644
--- a/Documentation/devicetree/bindings/interconnect/interconnect.txt
+++ b/Documentation/devicetree/bindings/interconnect/interconnect.txt
@@ -51,6 +51,9 @@ interconnect-names : List of interconnect path name strings sorted in the same
interconnect-names to match interconnect paths with interconnect
specifier pairs.
+ Reserved interconnect names:
+ * dma: Path from the device to the main memory of the system
+
Example:
sdhci@7864000 {
--
git-series 0.9.1
next prev parent reply other threads:[~2019-02-11 15:02 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-11 15:02 [PATCH v3 0/7] sunxi: Add DT representation for the MBUS controller Maxime Ripard
2019-02-11 15:02 ` Maxime Ripard [this message]
2019-03-01 17:48 ` [PATCH v3 1/7] dt-bindings: interconnect: Add a dma interconnect name Georgi Djakov
2019-03-05 15:53 ` Maxime Ripard
2019-03-05 16:14 ` Robin Murphy
2019-03-07 15:15 ` Georgi Djakov
2019-03-07 15:47 ` Maxime Ripard
2019-03-07 16:09 ` Chen-Yu Tsai
2019-03-11 10:11 ` Maxime Ripard
2019-03-11 14:11 ` Chen-Yu Tsai
2019-03-13 11:48 ` Georgi Djakov
2019-02-11 15:02 ` [PATCH v3 2/7] dt-bindings: bus: Add binding for the Allwinner MBUS controller Maxime Ripard
2019-02-12 18:53 ` Robin Murphy
2019-02-11 15:02 ` [PATCH v3 3/7] of: address: Add parent pointer to the __of_translate_address args Maxime Ripard
2019-02-12 18:02 ` Robin Murphy
2019-02-11 15:02 ` [PATCH v3 4/7] of: address: Add support for the parent DMA bus Maxime Ripard
2019-02-12 18:15 ` Robin Murphy
2019-02-11 15:02 ` [PATCH v3 5/7] drm/sun4i: Rely on dma interconnect for our RAM offset Maxime Ripard
2019-02-12 18:46 ` Robin Murphy
2019-02-13 15:41 ` Maxime Ripard
2019-02-13 16:40 ` Robin Murphy
2019-02-19 10:55 ` Maxime Ripard
2019-03-05 16:11 ` Robin Murphy
2019-02-11 15:02 ` [PATCH v3 6/7] clk: sunxi-ng: sun5i: Export the MBUS clock Maxime Ripard
2019-02-11 15:02 ` [PATCH v3 7/7] ARM: dts: sun5i: Add the MBUS controller Maxime Ripard
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