From: Ralf Baechle <ralf@linux-mips.org>
Date: Fri, 16 Nov 2007 14:54:46 +0000 (+0000)
Subject: [MIPS] Malta: Enable tickless and highres timers.
X-Git-Tag: v2.6.24-rc5~2^2
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba0f00b9fcb02b10cc9929fec660f86d1af6a41a;p=linux-2.6

[MIPS] Malta: Enable tickless and highres timers.

Most Malta use an FPGA CPU card which rarely is good for more than 40MHz.
So the performance penalta of the regular timer interrupt, especially
for the VSMP kernel model is significant, even at a mere 100Hz.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/configs/malta_defconfig b/arch/mips/configs/malta_defconfig
index fbd2d802fd..4b7e43c9f6 100644
--- a/arch/mips/configs/malta_defconfig
+++ b/arch/mips/configs/malta_defconfig
@@ -49,10 +49,13 @@ CONFIG_RWSEM_GENERIC_SPINLOCK=y
 CONFIG_GENERIC_FIND_NEXT_BIT=y
 CONFIG_GENERIC_HWEIGHT=y
 CONFIG_GENERIC_CALIBRATE_DELAY=y
+CONFIG_GENERIC_CLOCKEVENTS=y
 CONFIG_GENERIC_TIME=y
+CONFIG_GENERIC_CMOS_UPDATE=y
 CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
 # CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ is not set
 CONFIG_ARCH_MAY_HAVE_PC_FDC=y
+CONFIG_CEVT_R4K=y
 CONFIG_DMA_NONCOHERENT=y
 CONFIG_DMA_NEED_PCI_MAP_STATE=y
 CONFIG_EARLY_PRINTK=y
@@ -76,6 +79,10 @@ CONFIG_MIPS_L1_CACHE_SHIFT=5
 #
 # CPU selection
 #
+CONFIG_TICK_ONESHOT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
 # CONFIG_CPU_LOONGSON2 is not set
 # CONFIG_CPU_MIPS32_R1 is not set
 CONFIG_CPU_MIPS32_R2=y
@@ -253,6 +260,7 @@ CONFIG_HW_HAS_PCI=y
 CONFIG_PCI=y
 # CONFIG_ARCH_SUPPORTS_MSI is not set
 CONFIG_MMU=y
+CONFIG_I8253=y
 
 #
 # PCCARD (PCMCIA/CardBus) support