qi-hardware/xburst-tools
1
0
Fork 0
mirror of git://projects.qi-hardware.com/xburst-tools.git synced 2024-11-29 10:10:37 +02:00
Code

add-gta03-pmu-533MHz-init.patch

Browse Source 
Get GTA03 into 533MHz / 133MHz memory bus goodness

Signed-off-by: Andy Green <andy@openmoko.com>
This commit is contained in:
Andy Green 2008-11-28 10:16:36 +00:00 committed by Andy Green
parent d593873938
commit 33ee0f3ae4
1 changed files with 32 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
qiboot/src/gta03/gta03.c
View File

@ -18,6 +18,10 @@ static const struct board_variant board_variants[] = {
void port_init_gta03(void)
{
unsigned int * MPLLCON = (unsigned int *)0x4c000004;
unsigned int * UPLLCON = (unsigned int *)0x4c000008;
unsigned int * CLKDIVN = (unsigned int *)0x4c000014;
//CAUTION:Follow the configuration order for setting the ports.
// 1) setting value(GPnDAT)
// 2) setting control register (GPnCON)
@ -116,7 +120,34 @@ void port_init_gta03(void)
rGPJCON = 0x02AAAAAA;
rGPJUP = 0x1FFFF;
serial_init_115200_s3c24xx(GTA03_DEBUG_UART, 33 /*MHz PCLK */);
/*
* We have to talk to the PMU a little bit
*/
/* push DOWN1 (CPU Core rail) to 1.7V, allowing 533MHz */
i2c_write_sync(&bb_s3c24xx, PCF50633_I2C_ADS, 0x1e, 0x2b);
/* change CPU clocking to 533MHz 1:4:8 */
/* clock divide 1:4:8 - do it first */
*CLKDIVN = 5;
/* configure UPLL */
*UPLLCON = ((88 << 12) + (4 << 4) + 2);
/* Magic delay: Page 7-19, seven nops between UPLL and MPLL */
asm __volatile__ (
"nop\n"\
"nop\n"\
"nop\n"\
"nop\n"\
"nop\n"\
"nop\n"\
"nop\n"\
);
/* configure MPLL */
*MPLLCON = ((169 << 12) + (2 << 4) + 1);
serial_init_115200_s3c24xx(GTA03_DEBUG_UART, 50 /*MHz PCLK */);
}
/**