| Message ID | 9d7e85914eb1cdb313b28cb019093a84dd9b4773.1703167505.git.michal.simek@amd.com |
|---|---|
| State | New |
| Headers | show |
| Series | dt-bindings: serial: Describe ARM dcc interface | expand |
On 12/22/23 09:20, Krzysztof Kozlowski wrote: > On 21/12/2023 15:05, Michal Simek wrote: >> 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 <michal.simek@amd.com> >> --- >> >> This communication interface is used for flash programming on Xilinx >> SOCs from U-Boot. >> https://source.denx.de/u-boot/u-boot/-/blob/master/drivers/serial/arm_dcc.c >> >> --- >> .../devicetree/bindings/serial/arm,dcc.yaml | 30 +++++++++++++++++++ >> 1 file changed, 30 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/serial/arm,dcc.yaml >> >> diff --git a/Documentation/devicetree/bindings/serial/arm,dcc.yaml b/Documentation/devicetree/bindings/serial/arm,dcc.yaml >> new file mode 100644 >> index 000000000000..fd0589356617 >> --- /dev/null >> +++ 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 <michal.simek@amd.com> >> + >> +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 > > no allOf: with $ref to serial.yaml? Does it differ somehow? Valid one could be only nodename format and maybe label. Others are not relevant. But if that's fine I can also add it. Thanks, Michal
On Tue, Jan 2, 2024 at 8:32 AM Michal Simek <michal.simek@amd.com> wrote: > > > > On 12/22/23 09:20, Krzysztof Kozlowski wrote: > > On 21/12/2023 15:05, Michal Simek wrote: > >> Debug Communication Channel (DCC) provides the way how to pass data between > >> target CPU and host via JTAG interface. Every CPU has own interface for > >> communication via dbgdtrtx_el0 and dbgdtrrx_el0 registers. > >> > >> Signed-off-by: Michal Simek <michal.simek@amd.com> > >> --- > >> > >> This communication interface is used for flash programming on Xilinx > >> SOCs from U-Boot. > >> https://source.denx.de/u-boot/u-boot/-/blob/master/drivers/serial/arm_dcc.c > >> > >> --- > >> .../devicetree/bindings/serial/arm,dcc.yaml | 30 +++++++++++++++++++ > >> 1 file changed, 30 insertions(+) > >> create mode 100644 Documentation/devicetree/bindings/serial/arm,dcc.yaml > >> > >> diff --git a/Documentation/devicetree/bindings/serial/arm,dcc.yaml b/Documentation/devicetree/bindings/serial/arm,dcc.yaml > >> new file mode 100644 > >> index 000000000000..fd0589356617 > >> --- /dev/null > >> +++ b/Documentation/devicetree/bindings/serial/arm,dcc.yaml > >> @@ -0,0 +1,30 @@ > >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > >> +%YAML 1.2 > >> +--- > >> +$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 <michal.simek@amd.com> > >> + > >> +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 > > > > no allOf: with $ref to serial.yaml? Does it differ somehow? > > Valid one could be only nodename format and maybe label. > Others are not relevant. But if that's fine I can also add it. Yeah, I think serial.yaml mostly doesn't apply here. Not really worth including for just the node name. Greg may have already processed this, so you might want to resend. Or wait a few days and I'll just apply it. Rob
diff --git a/Documentation/devicetree/bindings/serial/arm,dcc.yaml b/Documentation/devicetree/bindings/serial/arm,dcc.yaml new file mode 100644 index 000000000000..fd0589356617 --- /dev/null +++ b/Documentation/devicetree/bindings/serial/arm,dcc.yaml @@ -0,0 +1,30 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$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 <michal.simek@amd.com> + +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"; + };
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 <michal.simek@amd.com> --- This communication interface is used for flash programming on Xilinx SOCs from U-Boot. https://source.denx.de/u-boot/u-boot/-/blob/master/drivers/serial/arm_dcc.c --- .../devicetree/bindings/serial/arm,dcc.yaml | 30 +++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 Documentation/devicetree/bindings/serial/arm,dcc.yaml