Dear all:

Now, I'm working on OMAP5912OSK with U-Boot 1.1.4-gb1d71358-dirty.

The message of print_cpuinfo() is: CPU: OMAP1611b at 96.0 MHz (DPLL1=96.0 MHz)

But OMAP5912OSK should work on 192MHz. How to let OMAP5912 work on 192MHz during U-Boot phase?

I found three reference, but these seem like no direct relationship.

1)OMAP5912OSK Board Support Library ~ti\boards\osk5912\lib\osk5912bsl\osk5912.c /* -------------------------------------------------------------- * * Clocking Parameters after initialization * * DPLL freq: 96 MHz 192 MHz * * Clock mode: Fully Sync Scalable Sync * * ARM freq: 96 MHz 192 MHz * * DSP freq: 96 MHz 192 MHz * * DSPMMU freq:96 MHz 192 MHz * * TC freq: 96 MHz 96 MHz * * LCD freq: 24 MHz 24 MHz * * PER freq: 24 MHz 24 MHz * * -------------------------------------------------------------- */

2)Linux kernel 2.6.14 include file linux/arch/arm/mach-omap1/clock.h

/*--------------------------------------------------------------- * Omap1 MPU rate table *---------------------------------------------------------------*/ static struct mpu_rate rate_table[] = { /* MPU MHz, xtal MHz, dpll1 MHz, CKCTL, DPLL_CTL * NOTE: Comment order here is different from bits in CKCTL value: * armdiv, dspdiv, dspmmu, tcdiv, perdiv, lcddiv */ #if defined(CONFIG_OMAP_ARM_192MHZ) { 192000000, 19200000, 192000000, 0x050f, 0x2510 }, /* 1/1/2/2/8/8 */ { 192000000, 12000000, 192000000, 0x050f, 0x2810 }, /* 1/1/2/2/8/8 */ { 96000000, 12000000, 192000000, 0x055f, 0x2810 }, /* 2/2/2/2/8/8 */ { 48000000, 12000000, 192000000, 0x0baf, 0x2810 }, /* 4/4/4/8/8/8 */ { 24000000, 12000000, 192000000, 0x0fff, 0x2810 }, /* 8/8/8/8/8/8 */ #endif #if defined(CONFIG_OMAP_ARM_168MHZ) { 168000000, 12000000, 168000000, 0x010f, 0x2710 }, /* 1/1/1/2/8/8 */ #endif #if defined(CONFIG_OMAP_ARM_120MHZ) { 120000000, 12000000, 120000000, 0x010a, 0x2510 }, /* 1/1/1/2/4/4 */ #endif #if defined(CONFIG_OMAP_ARM_60MHZ) { 60000000, 12000000, 60000000, 0x0005, 0x2290 }, /* 1/1/1/1/2/2 */ #endif #if defined(CONFIG_OMAP_ARM_30MHZ) { 30000000, 12000000, 60000000, 0x0555, 0x2290 }, /* 2/2/2/2/2/2 */ #endif { 0, 0, 0, 0, 0 }, };

3)U-Boot DPLL1 setting u-boot/board/omap5912osk/lowlevel_init.S

VAL_ARM_CKCTL: .word 0x2000 /* was: 0x3000, now use CLK_REF for timer input */ VAL_DPLL1_CTL: .word 0x2830

Best regards, phantom yang

From: "Stefan Roese" Don't start working on such an old version of U-Boot. Please use current top-of-git tree version. Especially for the OMAP5912OSK some important changes have been incoorporated.