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authorJared Hulbert <jaredeh@gmail.com>2006-01-05 21:12:26 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-01-05 21:12:26 +0000
commit5b2e98cdf3a6ac6c57de6a2156c673d4b0262684 (patch)
treed4e1c3acd232ffe1642dfcf764558360a7bfaea6 /arch/arm
parent54e269ead6e672325866037b0617a72edd1396b9 (diff)
[ARM] 3206/1: Modifications to the bus arbiter controller for the Intel PXA27x
Patch from Jared Hulbert The following patch changes the bus arbiter controller settings for the Intel PXA27x Application Processor Family. Up to 5% better video performance. It parks the bus on the core while not in use and sets the arbitration for other bus items. The patch only applies changes to the Intel Mainstone development platform. This patch is not compatible with preproduction Intel PXA27x silicon. This patch is based on the Intel Linux Preview Kit released to the public on 25 Feb. 2005 found at ftp://ftp.arm.linux.org.uk/pub/linux/arm/people/xscale/mainstone/02-25-2005/. Signed-off-by: Justin A Treon <justin_treon@yahoo.com> Signed-off-by: Jared Hulbert <jaredeh@gmail.com> Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-pxa/mainstone.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/mainstone.c b/arch/arm/mach-pxa/mainstone.c
index 07892f4012d..fe7404318aa 100644
--- a/arch/arm/mach-pxa/mainstone.c
+++ b/arch/arm/mach-pxa/mainstone.c
@@ -407,6 +407,12 @@ static void __init mainstone_init(void)
printk(KERN_NOTICE "Mainstone configured to boot from %s\n",
mst_flash_data[0].name);
+ /* system bus arbiter setting
+ * - Core_Park
+ * - LCD_wt:DMA_wt:CORE_Wt = 2:3:4
+ */
+ ARB_CNTRL = ARB_CORE_PARK | 0x234;
+
/*
* On Mainstone, we route AC97_SYSCLK via GPIO45 to
* the audio daughter card