1d160c341SMiquel Raynal* Marvell UART : Non standard UART used in some of Marvell EBU SoCs 2d160c341SMiquel Raynal e.g., Armada-3700. 38b495857SGeert Uytterhoeven 48b495857SGeert UytterhoevenRequired properties: 5d160c341SMiquel Raynal- compatible: 6d160c341SMiquel Raynal - "marvell,armada-3700-uart" for the standard variant of the UART 7d160c341SMiquel Raynal (32 bytes FIFO, no DMA, level interrupts, 8-bit access to the 856b32769SPali Rohár FIFO), called also UART1. 9d160c341SMiquel Raynal - "marvell,armada-3700-uart-ext" for the extended variant of the 10d160c341SMiquel Raynal UART (128 bytes FIFO, DMA, front interrupts, 8-bit or 32-bit 1156b32769SPali Rohár accesses to the FIFO), called also UART2. 128b495857SGeert Uytterhoeven- reg: offset and length of the register set for the device. 13d160c341SMiquel Raynal- clocks: UART reference clock used to derive the baudrate. If no clock 14d160c341SMiquel Raynal is provided (possible only with the "marvell,armada-3700-uart" 15d160c341SMiquel Raynal compatible string for backward compatibility), it will only work 16d160c341SMiquel Raynal if the baudrate was initialized by the bootloader and no baudrate 17*ebd7e37aSPali Rohár change will then be possible. When provided it should be UART1-clk 18*ebd7e37aSPali Rohár for standard variant of UART and UART2-clk for extended variant 19*ebd7e37aSPali Rohár of UART. TBG clock (with UART TBG divisors d1=d2=1) or xtal clock 20*ebd7e37aSPali Rohár should not be used and are supported only for backward compatibility. 21d160c341SMiquel Raynal- interrupts: 22d160c341SMiquel Raynal - Must contain three elements for the standard variant of the IP 23d160c341SMiquel Raynal (marvell,armada-3700-uart): "uart-sum", "uart-tx" and "uart-rx", 24d160c341SMiquel Raynal respectively the UART sum interrupt, the UART TX interrupt and 25d160c341SMiquel Raynal UART RX interrupt. A corresponding interrupt-names property must 26d160c341SMiquel Raynal be defined. 27d160c341SMiquel Raynal - Must contain two elements for the extended variant of the IP 28d160c341SMiquel Raynal (marvell,armada-3700-uart-ext): "uart-tx" and "uart-rx", 29d160c341SMiquel Raynal respectively the UART TX interrupt and the UART RX interrupt. A 3017a16542SGeert Uytterhoeven corresponding interrupt-names property must be defined. 31d160c341SMiquel Raynal - For backward compatibility reasons, a single element interrupts 32d160c341SMiquel Raynal property is also supported for the standard variant of the IP, 33d160c341SMiquel Raynal containing only the UART sum interrupt. This form is deprecated 34d160c341SMiquel Raynal and should no longer be used. 358b495857SGeert Uytterhoeven 368b495857SGeert UytterhoevenExample: 37d160c341SMiquel Raynal uart0: serial@12000 { 388b495857SGeert Uytterhoeven compatible = "marvell,armada-3700-uart"; 3956b32769SPali Rohár reg = <0x12000 0x18>; 40*ebd7e37aSPali Rohár clocks = <&uartclk 0>; 41d160c341SMiquel Raynal interrupts = 42d160c341SMiquel Raynal <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>, 43d160c341SMiquel Raynal <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>, 44d160c341SMiquel Raynal <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>; 45d160c341SMiquel Raynal interrupt-names = "uart-sum", "uart-tx", "uart-rx"; 46d160c341SMiquel Raynal }; 47d160c341SMiquel Raynal 48d160c341SMiquel Raynal uart1: serial@12200 { 49d160c341SMiquel Raynal compatible = "marvell,armada-3700-uart-ext"; 50d160c341SMiquel Raynal reg = <0x12200 0x30>; 51*ebd7e37aSPali Rohár clocks = <&uartclk 1>; 52d160c341SMiquel Raynal interrupts = 53d160c341SMiquel Raynal <GIC_SPI 30 IRQ_TYPE_EDGE_RISING>, 54d160c341SMiquel Raynal <GIC_SPI 31 IRQ_TYPE_EDGE_RISING>; 55d160c341SMiquel Raynal interrupt-names = "uart-tx", "uart-rx"; 568b495857SGeert Uytterhoeven }; 57