linux/arch/arm/boot/dts/at91sam9x5_usart3.dtsi
Jiri Prchal dd4f25a3ed ARM: at91: at91sam9x5 dt: add usart dma definitions to dt
This patch adds usart dma definitions to both dtsi for sam9x5 chips. Without
usage of dma it's unable to catch all bytes on usart receiver.

Signed-off-by: Jiri Prchal <jiri.prchal@aksignal.cz>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-11-03 11:34:23 +01:00

70 lines
1.6 KiB
Plaintext

/*
* at91sam9x5_usart3.dtsi - Device Tree Include file for AT91SAM9x5 SoC with
* 4 USART.
*
* Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com>
*
* Licensed under GPLv2.
*/
#include <dt-bindings/pinctrl/at91.h>
#include <dt-bindings/interrupt-controller/irq.h>
/ {
aliases {
serial4 = &usart3;
};
ahb {
apb {
pinctrl@fffff400 {
usart3 {
pinctrl_usart3: usart3-0 {
atmel,pins =
<AT91_PIOC 22 AT91_PERIPH_B AT91_PINCTRL_PULL_UP /* PC22 periph B with pullup */
AT91_PIOC 23 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC23 periph B */
};
pinctrl_usart3_rts: usart3_rts-0 {
atmel,pins =
<AT91_PIOC 24 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC24 periph B */
};
pinctrl_usart3_cts: usart3_cts-0 {
atmel,pins =
<AT91_PIOC 25 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC25 periph B */
};
pinctrl_usart3_sck: usart3_sck-0 {
atmel,pins =
<AT91_PIOC 26 AT91_PERIPH_B AT91_PINCTRL_NONE>; /* PC26 periph B */
};
};
};
pmc: pmc@fffffc00 {
periphck {
usart3_clk: usart3_clk {
#clock-cells = <0>;
reg = <8>;
};
};
};
usart3: serial@f8028000 {
compatible = "atmel,at91sam9260-usart";
reg = <0xf8028000 0x200>;
interrupts = <8 IRQ_TYPE_LEVEL_HIGH 5>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usart3>;
dmas = <&dma1 1 AT91_DMA_CFG_PER_ID(14)>,
<&dma1 1 (AT91_DMA_CFG_PER_ID(15) | AT91_DMA_CFG_FIFOCFG_ASAP)>;
dma-names = "tx", "rx";
clocks = <&usart3_clk>;
clock-names = "usart";
status = "disabled";
};
};
};
};