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authorAaro Koskinen <aaro.koskinen@nokia.com>2010-02-17 00:06:14 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-04-29 21:03:49 +0400
commitcc761beda2426cf663a649b905b6643673ff7b30 (patch)
treef80711b8128c855afb5e8a6d1cef69656f91f272
parent28d7f4ec98a8edb029ef24c1ee4af6a1ccbc9633 (diff)
downloadlinux-cc761beda2426cf663a649b905b6643673ff7b30.tar.xz
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 <mikpe@it.uu.se> Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Acked-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/mach-iop32x/n2100.c2
1 files changed, 1 insertions, 1 deletions
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,