* [PATCH v7 1/7] dt-bindings: Add a binding for Mediatek SCP
[not found] <20190327051450.16222-1-pihsun@chromium.org>
@ 2019-03-27 5:14 ` Peter Shih
2019-03-27 5:14 ` [PATCH v7 5/7] dt-bindings: Add binding for cros-ec-rpmsg Peter Shih
1 sibling, 0 replies; 3+ messages in thread
From: Peter Shih @ 2019-03-27 5:14 UTC (permalink / raw)
Cc: Pi-Hsun Shih, Erin Lo, Rob Herring, Ohad Ben-Cohen,
Bjorn Andersson, Rob Herring, Mark Rutland, Matthias Brugger,
open list:REMOTE PROCESSOR REMOTEPROC SUBSYSTEM,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS,
moderated list:ARM/Mediatek SoC support,
moderated list:ARM/Mediatek SoC support, open list
From: Erin Lo <erin.lo@mediatek.com>
Add a DT binding documentation of SCP for the
MT8183 SoC from Mediatek.
Signed-off-by: Erin Lo <erin.lo@mediatek.com>
Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Changes from v6:
- No change.
Changes from v5:
- Remove dependency on CONFIG_RPMSG_MTK_SCP.
Changes from v4:
- Add detail of more properties.
- Document the usage of mtk,rpmsg-name in subnode from the new design.
Changes from v3:
- No change.
Changes from v2:
- No change. I realized that for this patch series, there's no need to
add anything under the mt8183-scp node (neither the mt8183-rpmsg or
the cros-ec-rpmsg) for them to work, since mt8183-rpmsg is added
directly as a rproc_subdev by code, and cros-ec-rpmsg is dynamically
created by SCP name service.
Changes from v1:
- No change.
---
.../bindings/remoteproc/mtk,scp.txt | 36 +++++++++++++++++++
1 file changed, 36 insertions(+)
create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
new file mode 100644
index 000000000000..3ba668bab14b
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
@@ -0,0 +1,36 @@
+Mediatek SCP Bindings
+----------------------------------------
+
+This binding provides support for ARM Cortex M4 Co-processor found on some
+Mediatek SoCs.
+
+Required properties:
+- compatible Should be "mediatek,mt8183-scp"
+- reg Should contain the address ranges for the two memory
+ regions, SRAM and CFG.
+- reg-names Contains the corresponding names for the two memory
+ regions. These should be named "sram" & "cfg".
+- clocks Clock for co-processor (See: ../clock/clock-bindings.txt)
+- clock-names Contains the corresponding name for the clock. This
+ should be named "main".
+
+Subnodes
+--------
+
+Subnodes of the SCP represent rpmsg devices. The names of the devices are not
+important. The properties of these nodes are defined by the individual bindings
+for the rpmsg devices - but must contain the following property:
+
+- mtk,rpmsg-name Contains the name for the rpmsg device. Used to match
+ the subnode to rpmsg device announced by SCP.
+
+Example:
+
+ scp: scp@10500000 {
+ compatible = "mediatek,mt8183-scp";
+ reg = <0 0x10500000 0 0x80000>,
+ <0 0x105c0000 0 0x5000>;
+ reg-names = "sram", "cfg";
+ clocks = <&infracfg CLK_INFRA_SCPSYS>;
+ clock-names = "main";
+ };
--
2.21.0.392.gf8f6787159e-goog
^ permalink raw reply related [flat|nested] 3+ messages in thread* [PATCH v7 5/7] dt-bindings: Add binding for cros-ec-rpmsg.
[not found] <20190327051450.16222-1-pihsun@chromium.org>
2019-03-27 5:14 ` [PATCH v7 1/7] dt-bindings: Add a binding for Mediatek SCP Peter Shih
@ 2019-03-27 5:14 ` Peter Shih
2019-04-06 6:05 ` Rob Herring
1 sibling, 1 reply; 3+ messages in thread
From: Peter Shih @ 2019-03-27 5:14 UTC (permalink / raw)
Cc: Pi-Hsun Shih, Lee Jones, Rob Herring, Mark Rutland, Benson Leung,
Enric Balletbo i Serra, Guenter Roeck,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS,
open list
From: Pi-Hsun Shih <pihsun@chromium.org>
Add a DT binding documentation for ChromeOS EC driver over rpmsg.
Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
---
Changes from v6:
- No change.
Changes from v5:
- New patch.
---
Documentation/devicetree/bindings/mfd/cros-ec.txt | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/mfd/cros-ec.txt b/Documentation/devicetree/bindings/mfd/cros-ec.txt
index 6245c9b1a68b..4860eabd0f72 100644
--- a/Documentation/devicetree/bindings/mfd/cros-ec.txt
+++ b/Documentation/devicetree/bindings/mfd/cros-ec.txt
@@ -3,7 +3,7 @@ ChromeOS Embedded Controller
Google's ChromeOS EC is a Cortex-M device which talks to the AP and
implements various function such as keyboard and battery charging.
-The EC can be connect through various means (I2C, SPI, LPC) and the
+The EC can be connect through various means (I2C, SPI, LPC, RPMSG) and the
compatible string used depends on the interface. Each connection method has
its own driver which connects to the top level interface-agnostic EC driver.
Other Linux driver (such as cros-ec-keyb for the matrix keyboard) connect to
@@ -17,6 +17,9 @@ Required properties (SPI):
- compatible: "google,cros-ec-spi"
- reg: SPI chip select
+Required properties (RPMSG):
+- compatible: "google,cros-ec-rpmsg"
+
Optional properties (SPI):
- google,cros-ec-spi-pre-delay: Some implementations of the EC need a little
time to wake up from sleep before they can receive SPI transfers at a high
--
2.21.0.392.gf8f6787159e-goog
^ permalink raw reply related [flat|nested] 3+ messages in thread