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Date:   Tue, 18 May 2021 09:58:31 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     gregkh@...uxfoundation.org, jirislaby@...nel.org,
        devicetree@...r.kernel.org
Cc:     linux-serial@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Neil Armstrong <narmstrong@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH 1/3] dt-bindings: serial: amlogic,meson-uart: add fifo-size property

On most of the Amlogic SoCs, the first UART controller in the "Everything-Else"
power domain has 128bytes of RX & TX FIFO, so add an optional property to describe
a different FIFO size from the other ports (64bytes).

Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
 .../devicetree/bindings/serial/amlogic,meson-uart.yaml       | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml
index 75ebc9952a99..7487aa6ef849 100644
--- a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml
@@ -55,6 +55,11 @@ properties:
       - const: pclk
       - const: baud
 
+  fifo-size:
+    description: The fifo size supported by the UART channel.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [64, 128]
+
 required:
   - compatible
   - reg
-- 
2.25.1

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