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| author | Chia-Wei Wang <chiawei_wang@aspeedtech.com> | 2021-09-27 05:30:51 +0300 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2021-09-30 01:11:08 +0300 |
| commit | ae11ad385f819fa473cc00de036a0dd074b6bf40 (patch) | |
| tree | 394cc988043531c95b1f0de00c297d801d88d70f /Documentation/devicetree/bindings/soc/aspeed | |
| parent | a2db23c110776c9073bc173b9c459a19dad2b600 (diff) | |
| download | linux-ae11ad385f819fa473cc00de036a0dd074b6bf40.tar.xz | |
dt-bindings: aspeed: Add UART routing controller
Add dt-bindings for Aspeed UART routing controller.
Signed-off-by: Oskar Senft <osk@google.com>
Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210927023053.6728-4-chiawei_wang@aspeedtech.com
Diffstat (limited to 'Documentation/devicetree/bindings/soc/aspeed')
| -rw-r--r-- | Documentation/devicetree/bindings/soc/aspeed/uart-routing.yaml | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/soc/aspeed/uart-routing.yaml b/Documentation/devicetree/bindings/soc/aspeed/uart-routing.yaml new file mode 100644 index 000000000000..6876407124dc --- /dev/null +++ b/Documentation/devicetree/bindings/soc/aspeed/uart-routing.yaml @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# # Copyright (c) 2018 Google LLC +# # Copyright (c) 2021 Aspeed Technology Inc. +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/soc/aspeed/uart-routing.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Aspeed UART Routing Controller + +maintainers: + - Oskar Senft <osk@google.com> + - Chia-Wei Wang <chiawei_wang@aspeedtech.com> + +description: + The Aspeed UART routing control allow to dynamically route the inputs for + the built-in UARTS and physical serial I/O ports. + + This allows, for example, to connect the output of UART to another UART. + This can be used to enable Host <-> BMC communication via UARTs, e.g. to + allow access to the Host's serial console. + + This driver is for the BMC side. The sysfs files allow the BMC userspace + which owns the system configuration policy, to configure how UARTs and + physical serial I/O ports are routed. + +properties: + compatible: + items: + - enum: + - aspeed,ast2400-uart-routing + - aspeed,ast2500-uart-routing + - aspeed,ast2600-uart-routing + reg: + maxItems: 1 + +required: + - compatible + +additionalProperties: false + +examples: + - | + lpc: lpc@1e789000 { + compatible = "aspeed,ast2600-lpc-v2", "simple-mfd", "syscon"; + reg = <0x1e789000 0x1000>; + + #address-cells = <1>; + #size-cells = <1>; + ranges = <0x0 0x1e789000 0x1000>; + + uart_routing: uart-routing@98 { + compatible = "aspeed,ast2600-uart-routing"; + reg = <0x98 0x8>; + }; + }; |