| Message ID | 2935be9896d54020720919e7dab7c2f86bdc83a3.1502886277.git.michal.simek@xilinx.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 16/08/17 13:24, Michal Simek wrote: > From: Soren Brinkmann <soren.brinkmann@xilinx.com> > > Document the DT bindings for the Zynq UltraScale+ PM Firmware. > > Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> > Signed-off-by: Michal Simek <michal.simek@xilinx.com> > --- > > Changes in v2: > - Move to bindings/firmware and also add it to firmware node > Reported-by Rob > > .../bindings/firmware/xlnx,zynqmp-pm.txt | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > create mode 100644 Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt > > diff --git a/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt > new file mode 100644 > index 000000000000..7de0c82758b3 > --- /dev/null > +++ b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt > @@ -0,0 +1,22 @@ > +Xilinx Zynq MPSoC Firmware Device Tree Bindings > + > +The zynqmp-pm node describes the interface to platform firmware. > + > +Required properties: > + - compatible: Must contain: "xlnx,zynqmp-pm" > + - method: The method of calling the PM-API firmware layer. > + Permitted values are: > + - "smc" : To be used in configurations without a hypervisor > + - "hvc" : To be used when hypervisor is present > + - interrupts: Interrupt specifier What exactly is this interrupt ? I see it's not SGI, so if it's SPI, where does this originate from ? How is that dealt ?
On Wed, Aug 16, 2017 at 02:24:56PM +0200, Michal Simek wrote: > From: Soren Brinkmann <soren.brinkmann@xilinx.com> > > Document the DT bindings for the Zynq UltraScale+ PM Firmware. > > Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> > Signed-off-by: Michal Simek <michal.simek@xilinx.com> > --- > > Changes in v2: > - Move to bindings/firmware and also add it to firmware node > Reported-by Rob > > .../bindings/firmware/xlnx,zynqmp-pm.txt | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > create mode 100644 Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt > > diff --git a/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt > new file mode 100644 > index 000000000000..7de0c82758b3 > --- /dev/null > +++ b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt > @@ -0,0 +1,22 @@ > +Xilinx Zynq MPSoC Firmware Device Tree Bindings > + > +The zynqmp-pm node describes the interface to platform firmware. Is there any documentation for this? I appreciate that the answer might be "no". > +Required properties: > + - compatible: Must contain: "xlnx,zynqmp-pm" > + - method: The method of calling the PM-API firmware layer. > + Permitted values are: > + - "smc" : To be used in configurations without a hypervisor > + - "hvc" : To be used when hypervisor is present > + - interrupts: Interrupt specifier For what, exactly? Is this an interrupt for FW to signal the OS somehow? If so, is it an SGI? Thanks, Mark.
On 16.8.2017 18:00, Mark Rutland wrote: > On Wed, Aug 16, 2017 at 02:24:56PM +0200, Michal Simek wrote: >> From: Soren Brinkmann <soren.brinkmann@xilinx.com> >> >> Document the DT bindings for the Zynq UltraScale+ PM Firmware. >> >> Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> >> Signed-off-by: Michal Simek <michal.simek@xilinx.com> >> --- >> >> Changes in v2: >> - Move to bindings/firmware and also add it to firmware node >> Reported-by Rob >> >> .../bindings/firmware/xlnx,zynqmp-pm.txt | 22 ++++++++++++++++++++++ >> 1 file changed, 22 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt >> >> diff --git a/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt >> new file mode 100644 >> index 000000000000..7de0c82758b3 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt >> @@ -0,0 +1,22 @@ >> +Xilinx Zynq MPSoC Firmware Device Tree Bindings >> + >> +The zynqmp-pm node describes the interface to platform firmware. > > Is there any documentation for this? I appreciate that the answer > might be "no". We have pm documentation somewhere but not sure if this firmware interface is the part of it. Let me ask around and see what I can find out. > >> +Required properties: >> + - compatible: Must contain: "xlnx,zynqmp-pm" >> + - method: The method of calling the PM-API firmware layer. >> + Permitted values are: >> + - "smc" : To be used in configurations without a hypervisor >> + - "hvc" : To be used when hypervisor is present >> + - interrupts: Interrupt specifier > > For what, exactly? > > Is this an interrupt for FW to signal the OS somehow? > > If so, is it an SGI? This is SPI. There is a dedicated hardware on the chip for communication with APU. https://www.xilinx.com/support/documentation/user_guides/ug1085-zynq-ultrascale-trm.pdf page 275 Anyway I don't need this for this driver that's why I will remove it. Thanks, Michal
On 16.8.2017 17:45, Sudeep Holla wrote: > > > On 16/08/17 13:24, Michal Simek wrote: >> From: Soren Brinkmann <soren.brinkmann@xilinx.com> >> >> Document the DT bindings for the Zynq UltraScale+ PM Firmware. >> >> Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> >> Signed-off-by: Michal Simek <michal.simek@xilinx.com> >> --- >> >> Changes in v2: >> - Move to bindings/firmware and also add it to firmware node >> Reported-by Rob >> >> .../bindings/firmware/xlnx,zynqmp-pm.txt | 22 ++++++++++++++++++++++ >> 1 file changed, 22 insertions(+) >> create mode 100644 Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt >> >> diff --git a/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt >> new file mode 100644 >> index 000000000000..7de0c82758b3 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt >> @@ -0,0 +1,22 @@ >> +Xilinx Zynq MPSoC Firmware Device Tree Bindings >> + >> +The zynqmp-pm node describes the interface to platform firmware. >> + >> +Required properties: >> + - compatible: Must contain: "xlnx,zynqmp-pm" >> + - method: The method of calling the PM-API firmware layer. >> + Permitted values are: >> + - "smc" : To be used in configurations without a hypervisor >> + - "hvc" : To be used when hypervisor is present >> + - interrupts: Interrupt specifier > > What exactly is this interrupt ? I see it's not SGI, so if it's SPI, > where does this originate from ? How is that dealt ? > Please look at my response to Mark for more details. Thanks, Michal
diff --git a/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt new file mode 100644 index 000000000000..7de0c82758b3 --- /dev/null +++ b/Documentation/devicetree/bindings/firmware/xlnx,zynqmp-pm.txt @@ -0,0 +1,22 @@ +Xilinx Zynq MPSoC Firmware Device Tree Bindings + +The zynqmp-pm node describes the interface to platform firmware. + +Required properties: + - compatible: Must contain: "xlnx,zynqmp-pm" + - method: The method of calling the PM-API firmware layer. + Permitted values are: + - "smc" : To be used in configurations without a hypervisor + - "hvc" : To be used when hypervisor is present + - interrupts: Interrupt specifier + +Examples: + + firmware { + zynqmp-firmware { + compatible = "xlnx,zynqmp-pm"; + method = "smc"; + interrupt-parent = <&gic>; + interrupts = <0 35 4>; + }; + };