| Message ID | 20210402092049.479-3-nava.manne@xilinx.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Enable PM generic domain support | expand |
On Fri, Apr 02, 2021 at 02:50:48PM +0530, Nava kishore Manne wrote: > Add fpga-region property 'power-domains' to allow to handle > the FPGA/PL power domins. > > dt-bindings: fpga: Enable PM generic domain support > > Signed-off-by: Nava kishore Manne <nava.manne@xilinx.com> > --- > .../devicetree/bindings/fpga/fpga-region.txt | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/Documentation/devicetree/bindings/fpga/fpga-region.txt b/Documentation/devicetree/bindings/fpga/fpga-region.txt > index e811cf825019..969ca53bb65e 100644 > --- a/Documentation/devicetree/bindings/fpga/fpga-region.txt > +++ b/Documentation/devicetree/bindings/fpga/fpga-region.txt > @@ -196,6 +196,20 @@ Optional properties: > - config-complete-timeout-us : The maximum time in microseconds time for the > FPGA to go to operating mode after the region has been programmed. > - child nodes : devices in the FPGA after programming. > +- power-domains : A phandle and PM domain specifier as defined by bindings of > + the power controller specified by phandle. > +Example: > + fpga_full: fpga-full { > + compatible = "fpga-region"; > + fpga-mgr = <&zynqmp_pcap>; > + #address-cells = <2>; > + #size-cells = <2>; > + ranges; > + power-domains = <&zynqmp_firmware PL_PD>; > + }; > + > + The PL_PD power domain will be turned on before loading the bitstream > +and turned off while removing/unloading the bitstream using overlays. Can multiple regions share a power-domain or is this specific to full fpga reconfiguration? - Moritz
Hi Moritz, Thanks for the response. Please find my response inline. > -----Original Message----- > From: Moritz Fischer <mdf@kernel.org> > Sent: Friday, April 2, 2021 10:46 PM > To: Nava kishore Manne <navam@xilinx.com> > Cc: mdf@kernel.org; trix@redhat.com; robh+dt@kernel.org; Michal Simek > <michals@xilinx.com>; linux-fpga@vger.kernel.org; > devicetree@vger.kernel.org; linux-kernel@vger.kernel.org; linux-arm- > kernel@lists.infradead.org; git <git@xilinx.com> > Subject: Re: [PATCH 2/3] fpga: region: Add fpga-region property 'power- > domains' > > On Fri, Apr 02, 2021 at 02:50:48PM +0530, Nava kishore Manne wrote: > > Add fpga-region property 'power-domains' to allow to handle the > > FPGA/PL power domins. > > > > dt-bindings: fpga: Enable PM generic domain support > > > > Signed-off-by: Nava kishore Manne <nava.manne@xilinx.com> > > --- > > .../devicetree/bindings/fpga/fpga-region.txt | 14 ++++++++++++++ > > 1 file changed, 14 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/fpga/fpga-region.txt > > b/Documentation/devicetree/bindings/fpga/fpga-region.txt > > index e811cf825019..969ca53bb65e 100644 > > --- a/Documentation/devicetree/bindings/fpga/fpga-region.txt > > +++ b/Documentation/devicetree/bindings/fpga/fpga-region.txt > > @@ -196,6 +196,20 @@ Optional properties: > > - config-complete-timeout-us : The maximum time in microseconds time > for the > > FPGA to go to operating mode after the region has been > programmed. > > - child nodes : devices in the FPGA after programming. > > +- power-domains : A phandle and PM domain specifier as defined by > bindings of > > + the power controller specified by phandle. > > +Example: > > + fpga_full: fpga-full { > > + compatible = "fpga-region"; > > + fpga-mgr = <&zynqmp_pcap>; > > + #address-cells = <2>; > > + #size-cells = <2>; > > + ranges; > > + power-domains = <&zynqmp_firmware PL_PD>; > > + }; > > + > > + The PL_PD power domain will be turned on before loading the > > +bitstream and turned off while removing/unloading the bitstream using > overlays. > > Can multiple regions share a power-domain or is this specific to full fpga > reconfiguration? > These are generic changes and not limited to full region. If H/W supports individual power domains to control the Partial reconfiguration regions we can control the individual Partial reconfiguration region power domains as well. Regards, Navakishore.
On Fri, 02 Apr 2021 14:50:48 +0530, Nava kishore Manne wrote: > Add fpga-region property 'power-domains' to allow to handle > the FPGA/PL power domins. > > dt-bindings: fpga: Enable PM generic domain support > > Signed-off-by: Nava kishore Manne <nava.manne@xilinx.com> > --- > .../devicetree/bindings/fpga/fpga-region.txt | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > Acked-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/fpga/fpga-region.txt b/Documentation/devicetree/bindings/fpga/fpga-region.txt index e811cf825019..969ca53bb65e 100644 --- a/Documentation/devicetree/bindings/fpga/fpga-region.txt +++ b/Documentation/devicetree/bindings/fpga/fpga-region.txt @@ -196,6 +196,20 @@ Optional properties: - config-complete-timeout-us : The maximum time in microseconds time for the FPGA to go to operating mode after the region has been programmed. - child nodes : devices in the FPGA after programming. +- power-domains : A phandle and PM domain specifier as defined by bindings of + the power controller specified by phandle. +Example: + fpga_full: fpga-full { + compatible = "fpga-region"; + fpga-mgr = <&zynqmp_pcap>; + #address-cells = <2>; + #size-cells = <2>; + ranges; + power-domains = <&zynqmp_firmware PL_PD>; + }; + + The PL_PD power domain will be turned on before loading the bitstream +and turned off while removing/unloading the bitstream using overlays. In the example below, when an overlay is applied targeting fpga-region0, fpga_mgr is used to program the FPGA. Two bridges are controlled during
Add fpga-region property 'power-domains' to allow to handle the FPGA/PL power domins. dt-bindings: fpga: Enable PM generic domain support Signed-off-by: Nava kishore Manne <nava.manne@xilinx.com> --- .../devicetree/bindings/fpga/fpga-region.txt | 14 ++++++++++++++ 1 file changed, 14 insertions(+)