dt-bindings: Add binding for atmel-usart in SPI mode
This patch moves the bindings for serial from serial/atmel-usart.txt to mfd/atmel-usart.txt and adds bindings for USART in SPI mode. Signed-off-by: Radu Pirea <radu.pirea@microchip.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
parent
64f3b6334d
commit
a785ce4c6d
|
@ -1,6 +1,6 @@
|
||||||
* Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
|
* Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
|
||||||
|
|
||||||
Required properties:
|
Required properties for USART:
|
||||||
- compatible: Should be "atmel,<chip>-usart" or "atmel,<chip>-dbgu"
|
- compatible: Should be "atmel,<chip>-usart" or "atmel,<chip>-dbgu"
|
||||||
The compatible <chip> indicated will be the first SoC to support an
|
The compatible <chip> indicated will be the first SoC to support an
|
||||||
additional mode or an USART new feature.
|
additional mode or an USART new feature.
|
||||||
|
@ -11,7 +11,13 @@ Required properties:
|
||||||
Required elements: "usart"
|
Required elements: "usart"
|
||||||
- clocks: phandles to input clocks.
|
- clocks: phandles to input clocks.
|
||||||
|
|
||||||
Optional properties:
|
Required properties for USART in SPI mode:
|
||||||
|
- #size-cells : Must be <0>
|
||||||
|
- #address-cells : Must be <1>
|
||||||
|
- cs-gpios: chipselects (internal cs not supported)
|
||||||
|
- atmel,usart-mode : Must be <AT91_USART_MODE_SPI> (found in dt-bindings/mfd/at91-usart.h)
|
||||||
|
|
||||||
|
Optional properties in serial mode:
|
||||||
- atmel,use-dma-rx: use of PDC or DMA for receiving data
|
- atmel,use-dma-rx: use of PDC or DMA for receiving data
|
||||||
- atmel,use-dma-tx: use of PDC or DMA for transmitting data
|
- atmel,use-dma-tx: use of PDC or DMA for transmitting data
|
||||||
- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD line respectively.
|
- {rts,cts,dtr,dsr,rng,dcd}-gpios: specify a GPIO for RTS/CTS/DTR/DSR/RI/DCD line respectively.
|
||||||
|
@ -62,3 +68,18 @@ Example:
|
||||||
dma-names = "tx", "rx";
|
dma-names = "tx", "rx";
|
||||||
atmel,fifo-size = <32>;
|
atmel,fifo-size = <32>;
|
||||||
};
|
};
|
||||||
|
|
||||||
|
- SPI mode:
|
||||||
|
#include <dt-bindings/mfd/at91-usart.h>
|
||||||
|
|
||||||
|
spi0: spi@f001c000 {
|
||||||
|
#address-cells = <1>;
|
||||||
|
#size-cells = <0>;
|
||||||
|
compatible = "atmel,at91rm9200-usart", "atmel,at91sam9260-usart";
|
||||||
|
atmel,usart-mode = <AT91_USART_MODE_SPI>;
|
||||||
|
reg = <0xf001c000 0x100>;
|
||||||
|
interrupts = <12 IRQ_TYPE_LEVEL_HIGH>;
|
||||||
|
clocks = <&usart0_clk>;
|
||||||
|
clock-names = "usart";
|
||||||
|
cs-gpios = <&pioB 3 0>;
|
||||||
|
};
|
|
@ -0,0 +1,17 @@
|
||||||
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||||||
|
/*
|
||||||
|
* This header provides macros for AT91 USART DT bindings.
|
||||||
|
*
|
||||||
|
* Copyright (C) 2018 Microchip Technology
|
||||||
|
*
|
||||||
|
* Author: Radu Pirea <radu.pirea@microchip.com>
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef __DT_BINDINGS_AT91_USART_H__
|
||||||
|
#define __DT_BINDINGS_AT91_USART_H__
|
||||||
|
|
||||||
|
#define AT91_USART_MODE_SERIAL 0
|
||||||
|
#define AT91_USART_MODE_SPI 1
|
||||||
|
|
||||||
|
#endif /* __DT_BINDINGS_AT91_USART_H__ */
|
Loading…
Reference in New Issue