From: Jolly Shah <JOLLYS@xilinx.com> To: Sudeep Holla <sudeep.holla@arm.com>, "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>, "matt@codeblueprint.co.uk" <matt@codeblueprint.co.uk>, "hkallweit1@gmail.com" <hkallweit1@gmail.com>, "michal.simek@xilinx.com" <michal.simek@xilinx.com>, "robh+dt@kernel.org" <robh+dt@kernel.org>, "mark.rutland@arm.com" <mark.rutland@arm.com> Cc: "ard.biesheuvel@linaro.org" <ard.biesheuvel@linaro.org>, "mingo@kernel.org" <mingo@kernel.org>, "keescook@chromium.org" <keescook@chromium.org>, "dmitry.torokhov@gmail.com" <dmitry.torokhov@gmail.com>, Rajan Vaja <RAJANV@xilinx.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "devicetree@vger.kernel.org" <devicetree@vger.kernel.org> Subject: RE: [PATCH v5 1/4] dt-bindings: firmware: Add bindings for ZynqMP firmware Date: Wed, 7 Mar 2018 22:25:03 +0000 [thread overview] Message-ID: <CY1PR0201MB0764FB23021F5DC694C7F56DB8D80@CY1PR0201MB0764.namprd02.prod.outlook.com> (raw) In-Reply-To: <778329dd-76a7-0151-26d9-30e87e0c888d@arm.com> Hi Sudeep, > -----Original Message----- > From: Sudeep Holla [mailto:sudeep.holla@arm.com] > Sent: Thursday, March 01, 2018 6:15 AM > To: Jolly Shah <JOLLYS@xilinx.com>; gregkh@linuxfoundation.org; > matt@codeblueprint.co.uk; hkallweit1@gmail.com; michal.simek@xilinx.com; > robh+dt@kernel.org; mark.rutland@arm.com > Cc: ard.biesheuvel@linaro.org; mingo@kernel.org; keescook@chromium.org; > dmitry.torokhov@gmail.com; Sudeep Holla <sudeep.holla@arm.com>; Rajan > Vaja <RAJANV@xilinx.com>; linux-arm-kernel@lists.infradead.org; linux- > kernel@vger.kernel.org; devicetree@vger.kernel.org; Jolly Shah > <JOLLYS@xilinx.com> > Subject: Re: [PATCH v5 1/4] dt-bindings: firmware: Add bindings for ZynqMP > firmware > > > > On 20/02/18 19:21, Jolly Shah wrote: > > Add documentation to describe Xilinx ZynqMP firmware driver bindings. > > Firmware driver provides an interface to firmware APIs. Interface APIs > > can be used by any driver to communicate to PMUFW (Platform Management > > Unit). > > > > Signed-off-by: Jolly Shah <jollys@xilinx.com> > > Signed-off-by: Rajan Vaja <rajanv@xilinx.com> > > --- > > .../firmware/xilinx/xlnx,zynqmp-firmware.txt | 24 > ++++++++++++++++++++++ > > 1 file changed, 24 insertions(+) > > create mode 100644 > > Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware > > .txt > > > > diff --git > > a/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmwa > > re.txt > > b/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmwa > > re.txt > > new file mode 100644 > > index 0000000..99434ba > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-fi > > +++ rmware.txt > > @@ -0,0 +1,24 @@ > > +Xilinx Zynq MPSoC Firmware Device Tree Bindings > > + > > +The zynqmp-firmware node describes the interface to platform firmware. > > +ZynqMP has an interface to communicate with secure firmware. Firmware > > +driver provides an interface to firmware APIs. Interface APIs can be > > +used by any driver to communicate to PMUFW(Platform Management Unit). > > +These requests include clock management, pin control, device control, > > +power management service, FPGA service and other platform management > > +services. > > + > > +Required properties: > > + - compatible: Must contain: "xlnx,zynqmp-firmware" > > + - method: The method of calling the PM-API firmware layer. > > + Permitted values are: > > + - "smc" : SMC #0, following the SMCCC > > + - "hvc" : HVC #0, following the SMCCC > > + > > +Examples: > > + firmware { > > + zynqmp_firmware: zynqmp-firmware { > > + compatible = "xlnx,zynqmp-firmware"; > > + method = "smc"; > > + }; > > + }; > > > > Do you foresee using SMC/HVC for this firmware even on future platforms? > If not, I suggest to keep the protocol part separate from the transport i.e. > smc/hvc via ATF. It could be replaced with mailbox or some h/w mechanism in > future ? > We have PSCI and EEMI interfaces exposed to linux from ATF. PSCI is an EEMI client. We do not have current plans to switch to mailbox as it will require 2 communication channels to PMU as PSCI is through ATF. > -- > Regards, > Sudeep
WARNING: multiple messages have this Message-ID (diff)
From: JOLLYS@xilinx.com (Jolly Shah) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v5 1/4] dt-bindings: firmware: Add bindings for ZynqMP firmware Date: Wed, 7 Mar 2018 22:25:03 +0000 [thread overview] Message-ID: <CY1PR0201MB0764FB23021F5DC694C7F56DB8D80@CY1PR0201MB0764.namprd02.prod.outlook.com> (raw) In-Reply-To: <778329dd-76a7-0151-26d9-30e87e0c888d@arm.com> Hi Sudeep, > -----Original Message----- > From: Sudeep Holla [mailto:sudeep.holla at arm.com] > Sent: Thursday, March 01, 2018 6:15 AM > To: Jolly Shah <JOLLYS@xilinx.com>; gregkh at linuxfoundation.org; > matt at codeblueprint.co.uk; hkallweit1 at gmail.com; michal.simek at xilinx.com; > robh+dt at kernel.org; mark.rutland at arm.com > Cc: ard.biesheuvel at linaro.org; mingo at kernel.org; keescook at chromium.org; > dmitry.torokhov at gmail.com; Sudeep Holla <sudeep.holla@arm.com>; Rajan > Vaja <RAJANV@xilinx.com>; linux-arm-kernel at lists.infradead.org; linux- > kernel at vger.kernel.org; devicetree at vger.kernel.org; Jolly Shah > <JOLLYS@xilinx.com> > Subject: Re: [PATCH v5 1/4] dt-bindings: firmware: Add bindings for ZynqMP > firmware > > > > On 20/02/18 19:21, Jolly Shah wrote: > > Add documentation to describe Xilinx ZynqMP firmware driver bindings. > > Firmware driver provides an interface to firmware APIs. Interface APIs > > can be used by any driver to communicate to PMUFW (Platform Management > > Unit). > > > > Signed-off-by: Jolly Shah <jollys@xilinx.com> > > Signed-off-by: Rajan Vaja <rajanv@xilinx.com> > > --- > > .../firmware/xilinx/xlnx,zynqmp-firmware.txt | 24 > ++++++++++++++++++++++ > > 1 file changed, 24 insertions(+) > > create mode 100644 > > Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware > > .txt > > > > diff --git > > a/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmwa > > re.txt > > b/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmwa > > re.txt > > new file mode 100644 > > index 0000000..99434ba > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-fi > > +++ rmware.txt > > @@ -0,0 +1,24 @@ > > +Xilinx Zynq MPSoC Firmware Device Tree Bindings > > + > > +The zynqmp-firmware node describes the interface to platform firmware. > > +ZynqMP has an interface to communicate with secure firmware. Firmware > > +driver provides an interface to firmware APIs. Interface APIs can be > > +used by any driver to communicate to PMUFW(Platform Management Unit). > > +These requests include clock management, pin control, device control, > > +power management service, FPGA service and other platform management > > +services. > > + > > +Required properties: > > + - compatible: Must contain: "xlnx,zynqmp-firmware" > > + - method: The method of calling the PM-API firmware layer. > > + Permitted values are: > > + - "smc" : SMC #0, following the SMCCC > > + - "hvc" : HVC #0, following the SMCCC > > + > > +Examples: > > + firmware { > > + zynqmp_firmware: zynqmp-firmware { > > + compatible = "xlnx,zynqmp-firmware"; > > + method = "smc"; > > + }; > > + }; > > > > Do you foresee using SMC/HVC for this firmware even on future platforms? > If not, I suggest to keep the protocol part separate from the transport i.e. > smc/hvc via ATF. It could be replaced with mailbox or some h/w mechanism in > future ? > We have PSCI and EEMI interfaces exposed to linux from ATF. PSCI is an EEMI client. We do not have current plans to switch to mailbox as it will require 2 communication channels to PMU as PSCI is through ATF. > -- > Regards, > Sudeep
next prev parent reply other threads:[~2018-03-07 22:25 UTC|newest] Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-02-20 19:21 [PATCH v5 0/4] drivers: firmware: xilinx: Add firmware driver support Jolly Shah 2018-02-20 19:21 ` Jolly Shah 2018-02-20 19:21 ` Jolly Shah 2018-02-20 19:21 ` [PATCH v5 1/4] dt-bindings: firmware: Add bindings for ZynqMP firmware Jolly Shah 2018-02-20 19:21 ` Jolly Shah 2018-02-20 19:21 ` Jolly Shah 2018-03-01 14:15 ` Sudeep Holla 2018-03-01 14:15 ` Sudeep Holla 2018-03-07 22:25 ` Jolly Shah [this message] 2018-03-07 22:25 ` Jolly Shah 2018-03-08 11:48 ` Sudeep Holla 2018-03-08 11:48 ` Sudeep Holla 2018-03-12 23:07 ` Jolly Shah 2018-03-12 23:07 ` Jolly Shah 2018-03-13 10:16 ` Sudeep Holla 2018-03-13 10:16 ` Sudeep Holla 2018-03-13 18:56 ` Jolly Shah 2018-03-13 18:56 ` Jolly Shah 2018-03-01 21:18 ` Rob Herring 2018-03-01 21:18 ` Rob Herring 2018-02-20 19:21 ` [PATCH v5 2/4] drivers: firmware: xilinx: Add ZynqMP firmware driver Jolly Shah 2018-02-20 19:21 ` Jolly Shah 2018-02-20 19:21 ` Jolly Shah 2018-03-01 14:27 ` Sudeep Holla 2018-03-01 14:27 ` Sudeep Holla 2018-03-01 14:27 ` Sudeep Holla 2018-03-07 0:44 ` Jolly Shah 2018-03-07 0:44 ` Jolly Shah 2018-03-08 12:18 ` Sudeep Holla 2018-03-08 12:18 ` Sudeep Holla 2018-03-12 23:05 ` Jolly Shah 2018-03-12 23:05 ` Jolly Shah 2018-03-13 10:24 ` Sudeep Holla 2018-03-13 10:24 ` Sudeep Holla 2018-03-15 17:53 ` Jolly Shah 2018-03-15 17:53 ` Jolly Shah 2018-03-15 17:57 ` Sudeep Holla 2018-03-15 17:57 ` Sudeep Holla 2018-03-14 13:22 ` Greg KH 2018-03-14 13:22 ` Greg KH 2018-02-20 19:21 ` [PATCH v5 3/4] drivers: firmware: xilinx: Add sysfs interface Jolly Shah 2018-02-20 19:21 ` Jolly Shah 2018-02-20 19:21 ` Jolly Shah 2018-03-01 13:32 ` Michal Simek 2018-03-01 13:32 ` Michal Simek 2018-03-01 14:09 ` Andy Shevchenko 2018-03-01 14:09 ` Andy Shevchenko 2018-03-01 14:44 ` Sudeep Holla 2018-03-01 14:44 ` Sudeep Holla 2018-03-07 22:03 ` Jolly Shah 2018-03-07 22:03 ` Jolly Shah 2018-03-07 22:03 ` Jolly Shah 2018-02-20 19:21 ` [PATCH v5 4/4] drivers: firmware: xilinx: Add debugfs interface Jolly Shah 2018-02-20 19:21 ` Jolly Shah 2018-02-20 19:21 ` Jolly Shah
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