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authorMichal Simek <[email protected]>2023-12-21 15:05:09 +0100
committerGreg Kroah-Hartman <[email protected]>2024-01-04 16:23:20 +0100
commitda680c045fde3c441bb0df5780f4ffc68327797d (patch)
tree027e03d88a71e360fe3d60e577a5195d26c6ae1e
parent83e571f054cd742eb9a46d46ef05193904adf53f (diff)
dt-bindings: serial: Describe ARM dcc interface
Debug Communication Channel (DCC) provides the way how to pass data between target CPU and host via JTAG interface. Every CPU has own interface for communication via dbgdtrtx_el0 and dbgdtrrx_el0 registers. Signed-off-by: Michal Simek <[email protected]> Reviewed-by: Rob Herring <[email protected]> Link: https://lore.kernel.org/r/9d7e85914eb1cdb313b28cb019093a84dd9b4773.1703167505.git.michal.simek@amd.com Signed-off-by: Greg Kroah-Hartman <[email protected]>
-rw-r--r--Documentation/devicetree/bindings/serial/arm,dcc.yaml30
1 files changed, 30 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/serial/arm,dcc.yaml b/Documentation/devicetree/bindings/serial/arm,dcc.yaml
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+++ b/Documentation/devicetree/bindings/serial/arm,dcc.yaml
@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/arm,dcc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM DCC (Data communication channel) serial emulation
+
+maintainers:
+ - Michal Simek <[email protected]>
+
+description: |
+ ARM DCC (Data communication channel) serial emulation interface available
+ via JTAG can be also used as one of serial line tightly coupled with every
+ ARM CPU available in the system.
+
+properties:
+ compatible:
+ const: arm,dcc
+
+required:
+ - compatible
+
+additionalProperties: false
+
+examples:
+ - |
+ serial {
+ compatible = "arm,dcc";
+ };