On Thu, Nov 07, 2019 at 04:05:08PM +0200, Tero Kristo wrote: > From: Suman Anna <s-anna@xxxxxx> > > Add the device tree bindings document for the IPU and DSP > remote processor devices on OMAP4+ SoCs. > > Signed-off-by: Suman Anna <s-anna@xxxxxx> > [t-kristo@xxxxxx: converted to schema] > Signed-off-by: Tero Kristo <t-kristo@xxxxxx> > --- > .../remoteproc/ti,omap-remoteproc.yaml | 250 ++++++++++++++++++ > 1 file changed, 250 insertions(+) > create mode 100644 Documentation/devicetree/bindings/remoteproc/ti,omap-remoteproc.yaml > > diff --git a/Documentation/devicetree/bindings/remoteproc/ti,omap-remoteproc.yaml b/Documentation/devicetree/bindings/remoteproc/ti,omap-remoteproc.yaml > new file mode 100644 > index 000000000000..901ccf1024c2 > --- /dev/null > +++ b/Documentation/devicetree/bindings/remoteproc/ti,omap-remoteproc.yaml > @@ -0,0 +1,249 @@ > +# SPDX-License-Identifier: GPL-2.0 For new bindings: # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/remoteproc/ti,omap-remoteproc.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: OMAP4+ Remoteproc Devices > + > +maintainers: > + - Suman Anna <s-anna@xxxxxx> > + > +description: > + The OMAP family of SoCs usually have one or more slave processor sub-systems > + that are used to offload some of the processor-intensive tasks, or to manage > + other hardware accelerators, for achieving various system level goals. > + > + The processor cores in the sub-system are usually behind an IOMMU, and may > + contain additional sub-modules like Internal RAM and/or ROMs, L1 and/or L2 > + caches, an Interrupt Controller, a Cache Controller etc. > + > + The OMAP SoCs usually have a DSP processor sub-system and/or an IPU processor > + sub-system. The DSP processor sub-system can contain any of the TI's C64x, > + C66x or C67x family of DSP cores as the main execution unit. The IPU processor > + sub-system usually contains either a Dual-Core Cortex-M3 or Dual-Core > + Cortex-M4 processors. > + > + Each remote processor sub-system is represented as a single DT node. Each node > + has a number of required or optional properties that enable the OS running on > + the host processor (MPU) to perform the device management of the remote > + processor and to communicate with the remote processor. The various properties > + can be classified as constant or variable. The constant properties are > + dictated by the SoC and does not change from one board to another having the > + same SoC. Examples of constant properties include 'iommus', 'reg'. The > + variable properties are dictated by the system integration aspects such as > + memory on the board, or configuration used within the corresponding firmware > + image. Examples of variable properties include 'mboxes', 'memory-region', > + 'timers', 'watchdog-timers' etc. > + > +properties: > + compatible: > + enum: > + - ti,omap4-dsp > + - ti,omap5-dsp > + - ti,dra7-dsp > + - ti,omap4-ipu > + - ti,omap5-ipu > + - ti,dra7-ipu > + > + iommus: > + $ref: /schemas/types.yaml#/definitions/phandle-array The type is already defined. You just need to say how many (with min/maxItems). > + description: | > + phandles to OMAP IOMMU nodes, that need to be programmed > + for this remote processor to access any external RAM memory or > + other peripheral device address spaces. This property usually > + has only a single phandle. Multiple phandles are used only in > + cases where the sub-system has different ports for different > + sub-modules within the processor sub-system (eg: DRA7 DSPs), > + and need the same programming in both the MMUs. > + > + mboxes: > + $ref: /schemas/types.yaml#/definitions/phandle-array Same here. > + description: | > + OMAP Mailbox specifier denoting the sub-mailbox, to be used for > + communication with the remote processor. The specifier format is > + as per the bindings, > + Documentation/devicetree/bindings/mailbox/omap-mailbox.txt > + This property should match with the sub-mailbox node used in > + the firmware image. > + > +# Optional properties: > +# -------------------- > +# Some of these properties are mandatory on some SoCs, and some are optional > +# depending on the configuration of the firmware image to be executed on the > +# remote processor. The conditions are mentioned for each property. if/then schema can define which ones are required for specific compatibles. > +# > +# The following are the optional properties: > + > + reg: > + minItems: 1 > + maxItems: 3 > + description: | > + Address space for any remoteproc memories present on > + the SoC. Should contain an entry for each value in > + 'reg-names'. These are mandatory for all DSP and IPU > + processors that have them (OMAP4/OMAP5 DSPs do not have > + any RAMs) > + > + reg-names: > + description: | > + Required names for each of the address spaces defined in > + the 'reg' property. Should contain a string from among > + the following names, each representing the corresponding > + internal RAM memory region. > + minItems: 1 > + maxItems: 3 > + items: > + - const: l2ram > + - const: l1pram > + - const: l1dram > + > + ti,bootreg: > + $ref: /schemas/types.yaml#/definitions/phandle-array > + description: | > + Should be a pair of the phandle to the System Control > + Configuration region that contains the boot address > + register, and the register offset of the boot address > + register within the System Control module. This property > + is required for all the DSP instances on OMAP4, OMAP5 > + and DRA7xx SoCs. > + > + memory-region: > + $ref: /schemas/types.yaml#/definitions/phandle > + description: | > + phandle to the reserved memory node to be associated > + with the remoteproc device. The reserved memory node > + can be a CMA memory node, and should be defined as > + per the bindings, > + Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt > + > + ti,timers: > + $ref: /schemas/types.yaml#/definitions/phandle-array > + description: | > + One or more phandles to OMAP DMTimer nodes, that serve > + as System/Tick timers for the OS running on the remote > + processors. This will usually be a single timer if the > + processor sub-system is running in SMP mode, or one per > + core in the processor sub-system. This can also be used > + to reserve specific timers to be dedicated to the > + remote processors. > + > + This property is mandatory on remote processors requiring > + external tick wakeup, and to support Power Management > + features. The timers to be used should match with the > + timers used in the firmware image. > + > + ti,watchdog-timers: > + $ref: /schemas/types.yaml#/definitions/phandle-array > + description: | > + One or more phandles to OMAP DMTimer nodes, used to > + serve as Watchdog timers for the processor cores. This > + will usually be one per executing processor core, even > + if the processor sub-system is running a SMP OS. > + > + The timers to be used should match with the watchdog > + timers used in the firmware image. > + > +required: > + - compatible > + - iommus > + - mboxes > + > +examples: > + - | > + > + //Example 1: OMAP4 DSP > + > + /* DSP Reserved Memory node */ > + reserved-memory { > + #address-cells = <1>; > + #size-cells = <1>; > + > + dsp_memory_region: dsp-memory@98000000 { > + compatible = "shared-dma-pool"; > + reg = <0x98000000 0x800000>; > + reusable; > + }; > + }; > + > + /* DSP node */ > + ocp { > + dsp: dsp { > + compatible = "ti,omap4-dsp"; > + ti,bootreg = <&scm_conf 0x304>; > + iommus = <&mmu_dsp>; > + mboxes = <&mailbox &mbox_dsp>; > + memory-region = <&dsp_memory_region>; > + ti,timers = <&timer5>; > + ti,watchdog-timers = <&timer6>; > + }; > + }; > + > + - |+ > + > + //Example 2: OMAP5 IPU > + > + /* IPU Reserved Memory node */ > + reserved-memory { > + #address-cells = <2>; > + #size-cells = <2>; > + > + ipu_memory_region: ipu-memory@95800000 { > + compatible = "shared-dma-pool"; > + reg = <0 0x95800000 0 0x3800000>; > + reusable; > + }; > + }; > + > + /* IPU node */ > + ocp { > + #address-cells = <1>; > + #size-cells = <1>; > + > + ipu: ipu@55020000 { > + compatible = "ti,omap5-ipu"; > + reg = <0x55020000 0x10000>; > + reg-names = "l2ram"; > + iommus = <&mmu_ipu>; > + mboxes = <&mailbox &mbox_ipu>; > + memory-region = <&ipu_memory_region>; > + ti,timers = <&timer3>, <&timer4>; > + ti,watchdog-timers = <&timer9>, <&timer11>; > + }; > + }; > + > + - |+ > + > + //Example 3: DRA7xx/AM57xx DSP > + > + /* DSP1 Reserved Memory node */ > + reserved-memory { > + #address-cells = <2>; > + #size-cells = <2>; > + > + dsp1_memory_region: dsp1-memory@99000000 { > + compatible = "shared-dma-pool"; > + reg = <0x0 0x99000000 0x0 0x4000000>; > + reusable; > + }; > + }; > + > + /* DSP1 node */ > + ocp { > + #address-cells = <1>; > + #size-cells = <1>; > + > + dsp1: dsp@40800000 { > + compatible = "ti,dra7-dsp"; > + reg = <0x40800000 0x48000>, > + <0x40e00000 0x8000>, > + <0x40f00000 0x8000>; > + reg-names = "l2ram", "l1pram", "l1dram"; > + ti,bootreg = <&scm_conf 0x55c>; > + iommus = <&mmu0_dsp1>, <&mmu1_dsp1>; > + mboxes = <&mailbox5 &mbox_dsp1_ipc3x>; > + memory-region = <&dsp1_memory_region>; > + ti,timers = <&timer5>; > + ti,watchdog-timers = <&timer10>; > + }; > + }; > -- > 2.17.1 > > -- > Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. 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