diff options
Diffstat (limited to 'kernel/Documentation/devicetree/bindings/arm/bcm')
6 files changed, 322 insertions, 4 deletions
diff --git a/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt b/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt index ac683480c..c78576bb7 100644 --- a/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt +++ b/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt @@ -1,8 +1,35 @@ Broadcom BCM2835 device tree bindings ------------------------------------------- -Boards with the BCM2835 SoC shall have the following properties: +Raspberry Pi Model A +Required root node properties: +compatible = "raspberrypi,model-a", "brcm,bcm2835"; -Required root node property: +Raspberry Pi Model A+ +Required root node properties: +compatible = "raspberrypi,model-a-plus", "brcm,bcm2835"; +Raspberry Pi Model B +Required root node properties: +compatible = "raspberrypi,model-b", "brcm,bcm2835"; + +Raspberry Pi Model B (no P5) +early model B with I2C0 rather than I2C1 routed to the expansion header +Required root node properties: +compatible = "raspberrypi,model-b-i2c0", "brcm,bcm2835"; + +Raspberry Pi Model B rev2 +Required root node properties: +compatible = "raspberrypi,model-b-rev2", "brcm,bcm2835"; + +Raspberry Pi Model B+ +Required root node properties: +compatible = "raspberrypi,model-b-plus", "brcm,bcm2835"; + +Raspberry Pi Compute Module +Required root node properties: +compatible = "raspberrypi,compute-module", "brcm,bcm2835"; + +Generic BCM2835 board +Required root node properties: compatible = "brcm,bcm2835"; diff --git a/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,bcm63138.txt b/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,bcm63138.txt index bd49987a8..b82b6a0ae 100644 --- a/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,bcm63138.txt +++ b/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,bcm63138.txt @@ -7,3 +7,79 @@ following properties: Required root node property: compatible: should be "brcm,bcm63138" + +An optional Boot lookup table Device Tree node is required for secondary CPU +initialization as well as a 'resets' phandle to the correct PMB controller as +defined in reset/brcm,bcm63138-pmb.txt for this secondary CPU, and an +'enable-method' property. + +Required properties for the Boot lookup table node: +- compatible: should be "brcm,bcm63138-bootlut" +- reg: register base address and length for the Boot Lookup table + +Optional properties for the primary CPU node: +- enable-method: should be "brcm,bcm63138" + +Optional properties for the secondary CPU node: +- enable-method: should be "brcm,bcm63138" +- resets: phandle to the relevant PMB controller, one integer indicating the internal + bus number, and a second integer indicating the address of the CPU in the PMB + internal bus number. + +Example: + + cpus { + cpu@0 { + compatible = "arm,cotex-a9"; + reg = <0>; + ... + enable-method = "brcm,bcm63138"; + }; + + cpu@1 { + compatible = "arm,cortex-a9"; + reg = <1>; + ... + enable-method = "brcm,bcm63138"; + resets = <&pmb0 4 1>; + }; + }; + + bootlut: bootlut@8000 { + compatible = "brcm,bcm63138-bootlut"; + reg = <0x8000 0x50>; + }; + +======= +reboot +------ +Two nodes are required for software reboot: a timer node and a syscon-reboot node. + +Timer node: + +- compatible: Must be "brcm,bcm6328-timer", "syscon" +- reg: Register base address and length + +Syscon reboot node: + +See Documentation/devicetree/bindings/power/reset/syscon-reboot.txt for the +detailed list of properties, the two values defined below are specific to the +BCM6328-style timer: + +- offset: Should be 0x34 to denote the offset of the TIMER_WD_TIMER_RESET register + from the beginning of the TIMER block +- mask: Should be 1 for the SoftRst bit. + +Example: + + timer: timer@80 { + compatible = "brcm,bcm6328-timer", "syscon"; + reg = <0x80 0x3c>; + }; + + reboot { + compatible = "syscon-reboot"; + regmap = <&timer>; + offset = <0x34>; + mask = <0x1>; + }; diff --git a/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt b/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt index 430608ec0..0d0c1ae81 100644 --- a/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt +++ b/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt @@ -20,6 +20,25 @@ system control is required: - compatible: "brcm,bcm<chip_id>-hif-cpubiuctrl", "syscon" - compatible: "brcm,bcm<chip_id>-hif-continuation", "syscon" +hif-cpubiuctrl node +------------------- +SoCs with Broadcom Brahma15 ARM-based CPUs have a specific Bus Interface Unit +(BIU) block which controls and interfaces the CPU complex to the different +Memory Controller Ports (MCP), one per memory controller (MEMC). This BIU block +offers a feature called Write Pairing which consists in collapsing two adjacent +cache lines into a single (bursted) write transaction towards the memory +controller (MEMC) to maximize write bandwidth. + +Required properties: + + - compatible: must be "brcm,bcm7445-hif-cpubiuctrl", "syscon" + +Optional properties: + + - brcm,write-pairing: + Boolean property, which when present indicates that the chip + supports write-pairing. + example: rdb { #address-cells = <1>; @@ -35,6 +54,7 @@ example: hif_cpubiuctrl: syscon@3e2400 { compatible = "brcm,bcm7445-hif-cpubiuctrl", "syscon"; reg = <0x3e2400 0x5b4>; + brcm,write-pairing; }; hif_continuation: syscon@452000 { @@ -43,8 +63,7 @@ example: }; }; -Lastly, nodes that allow for support of SMP initialization and reboot are -required: +Nodes that allow for support of SMP initialization and reboot are required: smpboot ------- @@ -95,3 +114,142 @@ example: compatible = "brcm,brcmstb-reboot"; syscon = <&sun_top_ctrl 0x304 0x308>; }; + + + +Power management +---------------- + +For power management (particularly, S2/S3/S5 system suspend), the following SoC +components are needed: + += Always-On control block (AON CTRL) + +This hardware provides control registers for the "always-on" (even in low-power +modes) hardware, such as the Power Management State Machine (PMSM). + +Required properties: +- compatible : should contain "brcm,brcmstb-aon-ctrl" +- reg : the register start and length for the AON CTRL block + +Example: + +aon-ctrl@410000 { + compatible = "brcm,brcmstb-aon-ctrl"; + reg = <0x410000 0x400>; +}; + += Memory controllers + +A Broadcom STB SoC typically has a number of independent memory controllers, +each of which may have several associated hardware blocks, which are versioned +independently (control registers, DDR PHYs, etc.). One might consider +describing these controllers as a parent "memory controllers" block, which +contains N sub-nodes (one for each controller in the system), each of which is +associated with a number of hardware register resources (e.g., its PHY). See +the example device tree snippet below. + +== MEMC (MEMory Controller) + +Represents a single memory controller instance. + +Required properties: +- compatible : should contain "brcm,brcmstb-memc" and "simple-bus" + +Should contain subnodes for any of the following relevant hardware resources: + +== DDR PHY control + +Control registers for this memory controller's DDR PHY. + +Required properties: +- compatible : should contain one of these + "brcm,brcmstb-ddr-phy-v225.1" + "brcm,brcmstb-ddr-phy-v240.1" + "brcm,brcmstb-ddr-phy-v240.2" + +- reg : the DDR PHY register range + +== DDR SHIMPHY + +Control registers for this memory controller's DDR SHIMPHY. + +Required properties: +- compatible : should contain "brcm,brcmstb-ddr-shimphy-v1.0" +- reg : the DDR SHIMPHY register range + +== MEMC DDR control + +Sequencer DRAM parameters and control registers. Used for Self-Refresh +Power-Down (SRPD), among other things. + +Required properties: +- compatible : should contain "brcm,brcmstb-memc-ddr" +- reg : the MEMC DDR register range + +Example: + +memory_controllers { + ranges; + compatible = "simple-bus"; + + memc@0 { + compatible = "brcm,brcmstb-memc", "simple-bus"; + ranges; + + ddr-phy@f1106000 { + compatible = "brcm,brcmstb-ddr-phy-v240.1"; + reg = <0xf1106000 0x21c>; + }; + + shimphy@f1108000 { + compatible = "brcm,brcmstb-ddr-shimphy-v1.0"; + reg = <0xf1108000 0xe4>; + }; + + memc-ddr@f1102000 { + reg = <0xf1102000 0x800>; + compatible = "brcm,brcmstb-memc-ddr"; + }; + }; + + memc@1 { + compatible = "brcm,brcmstb-memc", "simple-bus"; + ranges; + + ddr-phy@f1186000 { + compatible = "brcm,brcmstb-ddr-phy-v240.1"; + reg = <0xf1186000 0x21c>; + }; + + shimphy@f1188000 { + compatible = "brcm,brcmstb-ddr-shimphy-v1.0"; + reg = <0xf1188000 0xe4>; + }; + + memc-ddr@f1182000 { + reg = <0xf1182000 0x800>; + compatible = "brcm,brcmstb-memc-ddr"; + }; + }; + + memc@2 { + compatible = "brcm,brcmstb-memc", "simple-bus"; + ranges; + + ddr-phy@f1206000 { + compatible = "brcm,brcmstb-ddr-phy-v240.1"; + reg = <0xf1206000 0x21c>; + }; + + shimphy@f1208000 { + compatible = "brcm,brcmstb-ddr-shimphy-v1.0"; + reg = <0xf1208000 0xe4>; + }; + + memc-ddr@f1202000 { + reg = <0xf1202000 0x800>; + compatible = "brcm,brcmstb-memc-ddr"; + }; + }; +}; diff --git a/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,nsp.txt b/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,nsp.txt new file mode 100644 index 000000000..eae53e455 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/arm/bcm/brcm,nsp.txt @@ -0,0 +1,34 @@ +Broadcom Northstar Plus device tree bindings +-------------------------------------------- + +Broadcom Northstar Plus family of SoCs are used for switching control +and management applications as well as residential router/gateway +applications. The SoC features dual core Cortex A9 ARM CPUs, integrating +several peripheral interfaces including multiple Gigabit Ethernet PHYs, +DDR3 memory, PCIE Gen-2, USB 2.0 and USB 3.0, serial and NAND flash, +SATA and several other IO controllers. + +Boards with Northstar Plus SoCs shall have the following properties: + +Required root node property: + +BCM58522 +compatible = "brcm,bcm58522", "brcm,nsp"; + +BCM58525 +compatible = "brcm,bcm58525", "brcm,nsp"; + +BCM58535 +compatible = "brcm,bcm58535", "brcm,nsp"; + +BCM58622 +compatible = "brcm,bcm58622", "brcm,nsp"; + +BCM58623 +compatible = "brcm,bcm58623", "brcm,nsp"; + +BCM58625 +compatible = "brcm,bcm58625", "brcm,nsp"; + +BCM88312 +compatible = "brcm,bcm88312", "brcm,nsp"; diff --git a/kernel/Documentation/devicetree/bindings/arm/bcm/ns2.txt b/kernel/Documentation/devicetree/bindings/arm/bcm/ns2.txt new file mode 100644 index 000000000..35f056f4a --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/arm/bcm/ns2.txt @@ -0,0 +1,9 @@ +Broadcom North Star 2 (NS2) device tree bindings +------------------------------------------------ + +Boards with NS2 shall have the following properties: + +Required root node property: + +NS2 SVK board +compatible = "brcm,ns2-svk", "brcm,ns2"; diff --git a/kernel/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.txt b/kernel/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.txt new file mode 100644 index 000000000..6824b3180 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.txt @@ -0,0 +1,14 @@ +Raspberry Pi VideoCore firmware driver + +Required properties: + +- compatible: Should be "raspberrypi,bcm2835-firmware" +- mboxes: Phandle to the firmware device's Mailbox. + (See: ../mailbox/mailbox.txt for more information) + +Example: + +firmware { + compatible = "raspberrypi,bcm2835-firmware"; + mboxes = <&mailbox>; +}; |