diff options
| author | Jared Hulbert <jaredeh@gmail.com> | 2006-01-05 21:12:26 (GMT) |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-01-05 21:12:26 (GMT) |
| commit | 5b2e98cdf3a6ac6c57de6a2156c673d4b0262684 (patch) | |
| tree | d4e1c3acd232ffe1642dfcf764558360a7bfaea6 /arch/arm/mach-pxa/mainstone.c | |
| parent | 54e269ead6e672325866037b0617a72edd1396b9 (diff) | |
| download | linux-5b2e98cdf3a6ac6c57de6a2156c673d4b0262684.tar.xz | |
[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/mach-pxa/mainstone.c')
| -rw-r--r-- | arch/arm/mach-pxa/mainstone.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/mainstone.c b/arch/arm/mach-pxa/mainstone.c index 07892f4..fe74043 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 |