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author | Arnd Bergmann <arnd@arndb.de> | 2021-12-20 17:37:23 +0300 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2021-12-20 17:37:24 +0300 |
commit | b87cd3759d9d45cbf763bb592129e02871e69261 (patch) | |
tree | 9a820277aa63ce3acd38e93640c38c899c887a32 /Documentation/devicetree/bindings/mailbox | |
parent | 79309f5bf43d31b13c657002b6eb728a0ec9cf79 (diff) | |
parent | c9059a6bb993db31cd85f3a4081766af9e61be40 (diff) | |
download | linux-b87cd3759d9d45cbf763bb592129e02871e69261.tar.xz |
Merge tag 'tegra-for-5.17-dt-bindings' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/dt
dt-bindings: Changes for v5.17-rc1
This contains a bunch of json-schema conversions for various Tegra-
related DT bindings and additions for new SoC and board support.
* tag 'tegra-for-5.17-dt-bindings' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux: (30 commits)
media: dt: bindings: tegra-vde: Document OPP and power domain
media: dt: bindings: tegra-vde: Convert to schema
dt-bindings: host1x: Document Memory Client resets of Host1x, GR2D and GR3D
dt-bindings: host1x: Document OPP and power domain properties
dt-bindings: clock: tegra-car: Document new clock sub-nodes
dt-bindings: ARM: tegra: Document Pegatron Chagall
dt-bindings: ARM: tegra: Document ASUS Transformers
dt-bindings: usb: tegra-xudc: Document interconnects and iommus properties
dt-bindings: serial: Document Tegra234 TCU
dt-bindings: serial: tegra-tcu: Convert to json-schema
dt-bindings: thermal: tegra186-bpmp: Convert to json-schema
dt-bindings: firmware: tegra: Convert to json-schema
dt-bindings: tegra: pmc: Convert to json-schema
dt-bindings: serial: 8250: Document Tegra234 UART
dt-bindings: mmc: tegra: Document Tegra234 SDHCI
dt-bindings: fuse: tegra: Document Tegra234 FUSE
dt-bindings: fuse: tegra: Convert to json-schema
dt-bindings: rtc: tegra: Document Tegra234 RTC
dt-bindings: rtc: tegra: Convert to json-schema
dt-bindings: mailbox: tegra: Document Tegra234 HSP
...
Link: https://lore.kernel.org/r/20211217162253.1801077-3-thierry.reding@gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'Documentation/devicetree/bindings/mailbox')
-rw-r--r-- | Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.txt | 72 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.yaml | 114 |
2 files changed, 114 insertions, 72 deletions
diff --git a/Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.txt b/Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.txt deleted file mode 100644 index ff3eafc5a882..000000000000 --- a/Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.txt +++ /dev/null @@ -1,72 +0,0 @@ -NVIDIA Tegra Hardware Synchronization Primitives (HSP) - -The HSP modules are used for the processors to share resources and communicate -together. It provides a set of hardware synchronization primitives for -interprocessor communication. So the interprocessor communication (IPC) -protocols can use hardware synchronization primitives, when operating between -two processors not in an SMP relationship. - -The features that HSP supported are shared mailboxes, shared semaphores, -arbitrated semaphores and doorbells. - -Required properties: -- name : Should be hsp -- compatible - Array of strings. - one of: - - "nvidia,tegra186-hsp" - - "nvidia,tegra194-hsp", "nvidia,tegra186-hsp" -- reg : Offset and length of the register set for the device. -- interrupt-names - Array of strings. - Contains a list of names for the interrupts described by the interrupt - property. May contain the following entries, in any order: - - "doorbell" - - "sharedN", where 'N' is a number from zero up to the number of - external interrupts supported by the HSP instance minus one. - Users of this binding MUST look up entries in the interrupt property - by name, using this interrupt-names property to do so. -- interrupts - Array of interrupt specifiers. - Must contain one entry per entry in the interrupt-names property, - in a matching order. -- #mbox-cells : Should be 2. - -The mbox specifier of the "mboxes" property in the client node should contain -two cells. The first cell determines the HSP type and the second cell is used -to identify the mailbox that the client is going to use. - -For doorbells, the second cell specifies the index of the doorbell to use. - -For shared mailboxes, the second cell is composed of two fields: -- bits 31..24: - A bit mask of flags that further specify how the shared mailbox will be - used. Valid flags are: - - bit 31: - Defines the direction of the mailbox. If set, the mailbox will be used - as a producer (i.e. used to send data). If cleared, the mailbox is the - consumer of data sent by a producer. - -- bits 23.. 0: - The index of the shared mailbox to use. The number of available mailboxes - may vary by instance of the HSP block and SoC generation. - -The following file contains definitions that can be used to construct mailbox -specifiers: - - <dt-bindings/mailbox/tegra186-hsp.h> - -Example: - -hsp_top0: hsp@3c00000 { - compatible = "nvidia,tegra186-hsp"; - reg = <0x0 0x03c00000 0x0 0xa0000>; - interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>; - interrupt-names = "doorbell"; - #mbox-cells = <2>; -}; - -client { - ... - mboxes = <&hsp_top0 TEGRA_HSP_MBOX_TYPE_DB TEGRA_HSP_DB_MASTER_XXX>; -}; diff --git a/Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.yaml b/Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.yaml new file mode 100644 index 000000000000..9f7a7296b57f --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/nvidia,tegra186-hsp.yaml @@ -0,0 +1,114 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/nvidia,tegra186-hsp.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVIDIA Tegra Hardware Synchronization Primitives (HSP) + +maintainers: + - Thierry Reding <thierry.reding@gmail.com> + - Jon Hunter <jonathanh@nvidia.com> + +description: | + The HSP modules are used for the processors to share resources and + communicate together. It provides a set of hardware synchronization + primitives for interprocessor communication. So the interprocessor + communication (IPC) protocols can use hardware synchronization + primitives, when operating between two processors not in an SMP + relationship. + + The features that HSP supported are shared mailboxes, shared + semaphores, arbitrated semaphores and doorbells. + + The mbox specifier of the "mboxes" property in the client node should + contain two cells. The first cell determines the HSP type and the + second cell is used to identify the mailbox that the client is going + to use. + + For doorbells, the second cell specifies the index of the doorbell to + use. + + For shared mailboxes, the second cell is composed of two fields: + - bits 31..24: + A bit mask of flags that further specify how the shared mailbox + will be used. Valid flags are: + - bit 31: + Defines the direction of the mailbox. If set, the mailbox + will be used as a producer (i.e. used to send data). If + cleared, the mailbox is the consumer of data sent by a + producer. + + - bits 23..0: + The index of the shared mailbox to use. The number of available + mailboxes may vary by instance of the HSP block and SoC + generation. + + The following file contains definitions that can be used to + construct mailbox specifiers: + + <dt-bindings/mailbox/tegra186-hsp.h> + +properties: + $nodename: + pattern: "^hsp@[0-9a-f]+$" + + compatible: + oneOf: + - const: nvidia,tegra186-hsp + - const: nvidia,tegra194-hsp + - items: + - const: nvidia,tegra234-hsp + - const: nvidia,tegra194-hsp + + reg: + maxItems: 1 + + interrupts: + minItems: 1 + maxItems: 9 + + interrupt-names: + oneOf: + # shared interrupts are optional + - items: + - const: doorbell + + - items: + - const: doorbell + - pattern: "^shared[0-7]$" + - pattern: "^shared[0-7]$" + - pattern: "^shared[0-7]$" + - pattern: "^shared[0-7]$" + - pattern: "^shared[0-7]$" + - pattern: "^shared[0-7]$" + - pattern: "^shared[0-7]$" + - pattern: "^shared[0-7]$" + + - items: + - pattern: "^shared[0-7]$" + - pattern: "^shared[0-7]$" + - pattern: "^shared[0-7]$" + - pattern: "^shared[0-7]$" + + "#mbox-cells": + const: 2 + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/mailbox/tegra186-hsp.h> + + hsp_top0: hsp@3c00000 { + compatible = "nvidia,tegra186-hsp"; + reg = <0x03c00000 0xa0000>; + interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>; + interrupt-names = "doorbell"; + #mbox-cells = <2>; + }; + + client { + mboxes = <&hsp_top0 TEGRA_HSP_MBOX_TYPE_DB TEGRA_HSP_DB_MASTER_CCPLEX>; + }; |