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| author | Radu Pirea <radu.pirea@microchip.com> | 2018-07-13 18:47:32 +0200 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2018-09-10 17:07:11 +0200 |
| commit | a785ce4c6d6c1e8e120a13a100edbb31b447675a (patch) | |
| tree | 62ca1b7241219efe2bed010f030c97638e8ead50 | |
| parent | MAINTAINERS: Add AT91 USART MFD entry (diff) | |
| download | linux-a785ce4c6d6c1e8e120a13a100edbb31b447675a.tar.xz linux-a785ce4c6d6c1e8e120a13a100edbb31b447675a.zip | |
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>
| -rw-r--r-- | Documentation/devicetree/bindings/mfd/atmel-usart.txt (renamed from Documentation/devicetree/bindings/serial/atmel-usart.txt) | 25 | ||||
| -rw-r--r-- | include/dt-bindings/mfd/at91-usart.h | 17 |
2 files changed, 40 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/mfd/atmel-usart.txt index 7c0d6b2f53e4..0348fef0f497 100644 --- a/Documentation/devicetree/bindings/serial/atmel-usart.txt +++ b/Documentation/devicetree/bindings/mfd/atmel-usart.txt @@ -1,6 +1,6 @@ * Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART) -Required properties: +Required properties for USART: - compatible: Should be "atmel,<chip>-usart" or "atmel,<chip>-dbgu" The compatible <chip> indicated will be the first SoC to support an additional mode or an USART new feature. @@ -11,7 +11,13 @@ Required properties: Required elements: "usart" - 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-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. @@ -62,3 +68,18 @@ Example: dma-names = "tx", "rx"; 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>; + }; diff --git a/include/dt-bindings/mfd/at91-usart.h b/include/dt-bindings/mfd/at91-usart.h new file mode 100644 index 000000000000..2de5bc312e1e --- /dev/null +++ b/include/dt-bindings/mfd/at91-usart.h @@ -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__ */ |