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acpi-prop: Make UART device properties to use global namespace #188

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Aug 6, 2024
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acpi-prop: Make UART device properties to use global namespace #188

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7 changes: 5 additions & 2 deletions acpi-prop.adoc
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Expand Up @@ -9,17 +9,20 @@ Request for additional property names in the `rscv-` namespace should be made as

[[acpi-props-uart]]
==== Properties for UART Devices
Generic 16550-compatible UART devices can have below device properties in the global name space
since Operating Systems are already using them.

[width=100%]
[%header, cols="10,5,25"]
|===
| Property (`rscv-uart-*`) ^| Type | Description
| Property ^| Type | Description
| `clock-frequency` | Integer | Clock feeding the IP block in Hz.
3+| _A value of zero will preclude the ability to set the baud rate, or
to configure a disabled device._
| `reg-offset` | Integer | Offset to apply to the register map base address from the start of the registers.
| `reg-shift` | Integer | Quantity to shift the register offsets by.
| `reg-io-width` | Integer | The size (in bytes) of the register accesses that should be performed on the device.
3+| _1, 2, 4 or 8._
| `rx-fifo-size` | Integer | The receive FIFO size (in bytes).
| `fifo-size` | Integer | The FIFO size (in bytes).
|===

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