From cc761beda2426cf663a649b905b6643673ff7b30 Mon Sep 17 00:00:00 2001 From: Aaro Koskinen Date: Tue, 16 Feb 2010 22:06:14 +0100 Subject: ARM: 5943/1: iop: n2100: enable serial interrupt Thecus N2100 has a jumper (J3/J4) to select whether the XINT1 interrupt line is connected to the second UHCI controller (position J3) or to the serial port UART (position J4). Currently, the kernel is hardcoded to assume the J3 position, and the serial port is always being used in polling mode. The patch adds the IRQ autodetection flag for the serial port interrupt, and also marks it as shared (as the driver for the second UHCI controller will request the interrupt in any case). Now, when the jumper is set to the J4 position, the serial port will have an interrupt line, resulting in less CPU overhead and faster throughput. Tested-by: Mikael Pettersson Signed-off-by: Aaro Koskinen Acked-by: Lennert Buytenhek Signed-off-by: Russell King --- arch/arm/mach-iop32x/n2100.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm/mach-iop32x/n2100.c') diff --git a/arch/arm/mach-iop32x/n2100.c b/arch/arm/mach-iop32x/n2100.c index 2a5c637639bb..266b1f58a784 100644 --- a/arch/arm/mach-iop32x/n2100.c +++ b/arch/arm/mach-iop32x/n2100.c @@ -177,7 +177,7 @@ static struct plat_serial8250_port n2100_serial_port[] = { .mapbase = N2100_UART, .membase = (char *)N2100_UART, .irq = 0, - .flags = UPF_SKIP_TEST, + .flags = UPF_SKIP_TEST | UPF_AUTO_IRQ | UPF_SHARE_IRQ, .iotype = UPIO_MEM, .regshift = 0, .uartclk = 1843200, -- cgit