| Message ID | 20231211091159.58564-2-manikanta.guntupalli@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add rs485 support to uartps driver | expand |
On 11/12/2023 10:11, Manikanta Guntupalli wrote: > Add optional gpio property to uartps node and reference to rs485.yaml ... diff --git a/Documentation/devicetree/bindings/serial/cdns,uart.yaml b/Documentation/devicetree/bindings/serial/cdns,uart.yaml > index e35ad1109efc..d5dd4e92d1fb 100644 > --- a/Documentation/devicetree/bindings/serial/cdns,uart.yaml > +++ b/Documentation/devicetree/bindings/serial/cdns,uart.yaml > @@ -46,6 +46,10 @@ properties: > power-domains: > maxItems: 1 > > + rts-gpios: > + description: Optional GPIO to control transmit/receive. > + maxItems: 1 Why do you exactly need it here? It's already allowed, isn't it? Best regards, Krzysztof
diff --git a/Documentation/devicetree/bindings/serial/cdns,uart.yaml b/Documentation/devicetree/bindings/serial/cdns,uart.yaml index e35ad1109efc..d5dd4e92d1fb 100644 --- a/Documentation/devicetree/bindings/serial/cdns,uart.yaml +++ b/Documentation/devicetree/bindings/serial/cdns,uart.yaml @@ -46,6 +46,10 @@ properties: power-domains: maxItems: 1 + rts-gpios: + description: Optional GPIO to control transmit/receive. + maxItems: 1 + required: - compatible - reg @@ -55,6 +59,7 @@ required: allOf: - $ref: serial.yaml# + - $ref: rs485.yaml# - if: properties: compatible:
Add optional gpio property to uartps node and reference to rs485.yaml On Xilinx/AMD Kria SOM KD240 board rs485 connects via TI ISOW1432 Transceiver device, where one GPIO is used for driving DE/RE signals. With rs485 half duplex configuration, DE and RE are shorted to each other, and at a time, any node acts as either a driver or a receiver. Here, DE - Driver enable. If pin is floating, driver is disabled. RE - Receiver enable. If pin is floating, receiver buffer is disabled. For more deatils, please find below link which contains Transceiver device(ISOW1432) datasheet https://www.ti.com/lit/ds/symlink/isow1432.pdf?ts=1682607122706&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FISOW1432%252Fpart-details%252FISOW1432DFMR%253FkeyMatch%253DISOW1432DFMR%2526tisearch%253Dsearch-everything%2526usecase%253DOPN rts-gpios is optional property, because it is not required for uart console node. Signed-off-by: Manikanta Guntupalli <manikanta.guntupalli@amd.com> --- Changes for V2: Modify optional gpio name to xlnx,phy-ctrl-gpios. Update commit description. Changes for V3: Modify optional gpio name to rts-gpios. Update commit description. Changes for V4: Update rts-gpios description. --- Documentation/devicetree/bindings/serial/cdns,uart.yaml | 5 +++++ 1 file changed, 5 insertions(+)