diff options
Diffstat (limited to 'Documentation/devicetree/bindings/firmware')
3 files changed, 59 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml index 590743883802..948e2a38beed 100644 --- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml +++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml @@ -364,7 +364,7 @@ examples: firmware { scmi { compatible = "arm,scmi-smc"; - shmem = <&cpu_scp_lpri0 &cpu_scp_lpri1>; + shmem = <&cpu_scp_lpri0>, <&cpu_scp_lpri1>; arm,smc-id = <0xc3000001>; #address-cells = <1>; diff --git a/Documentation/devicetree/bindings/firmware/arm,scpi.yaml b/Documentation/devicetree/bindings/firmware/arm,scpi.yaml index 23b346bd1252..1f9322925e7c 100644 --- a/Documentation/devicetree/bindings/firmware/arm,scpi.yaml +++ b/Documentation/devicetree/bindings/firmware/arm,scpi.yaml @@ -43,6 +43,7 @@ properties: by remote SCP firmware for use by SCPI message protocol should be specified in any order. minItems: 1 + maxItems: 4 shmem: description: @@ -51,6 +52,7 @@ properties: be any memory reserved for the purpose of this communication between the processors. minItems: 1 + maxItems: 4 power-controller: type: object @@ -235,8 +237,8 @@ examples: firmware { scpi { compatible = "amlogic,meson-gxbb-scpi", "arm,scpi-pre-1.0"; - mboxes = <&mailbox 1 &mailbox 2>; - shmem = <&cpu_scp_lpri &cpu_scp_hpri>; + mboxes = <&mailbox 1>, <&mailbox 2>; + shmem = <&cpu_scp_lpri>, <&cpu_scp_hpri>; scpi_sensors1: sensors { compatible = "amlogic,meson-gxbb-scpi-sensors", "arm,scpi-sensors"; diff --git a/Documentation/devicetree/bindings/firmware/qemu,fw-cfg-mmio.yaml b/Documentation/devicetree/bindings/firmware/qemu,fw-cfg-mmio.yaml new file mode 100644 index 000000000000..fcf0011b8e6d --- /dev/null +++ b/Documentation/devicetree/bindings/firmware/qemu,fw-cfg-mmio.yaml @@ -0,0 +1,54 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/firmware/qemu,fw-cfg-mmio.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: QEMU Firmware Configuration bindings + +maintainers: + - Rob Herring <robh@kernel.org> + +description: | + Various QEMU emulation / virtualization targets provide the following + Firmware Configuration interface on the "virt" machine type: + + - A write-only, 16-bit wide selector (or control) register, + - a read-write, 64-bit wide data register. + + QEMU exposes the control and data register to guests as memory mapped + registers; their location is communicated to the guest's UEFI firmware in the + DTB that QEMU places at the bottom of the guest's DRAM. + + The authoritative guest-side hardware interface documentation to the fw_cfg + device can be found in "docs/specs/fw_cfg.txt" in the QEMU source tree. + + +properties: + compatible: + const: qemu,fw-cfg-mmio + + reg: + maxItems: 1 + description: | + * Bytes 0x0 to 0x7 cover the data register. + * Bytes 0x8 to 0x9 cover the selector register. + * Further registers may be appended to the region in case of future interface + revisions / feature bits. + + dma-coherent: true + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + + fw-cfg@9020000 { + compatible = "qemu,fw-cfg-mmio"; + reg = <0x9020000 0xa>; + }; +... |