[U-Boot] [T-Engine] UBoot configuration for T-Engine/SH7727 MS7727CP02 DevKit

[thaoth <thaoth@cybersoft-vn.com>]

Hi Nobuhiro Iwamatsu,

> Please set outside clock to CONFIG_SYS_CLK_FREQ.
Sorry I didn't see "outside clock" in T-Engine/SH7727 specification. Regard
to clock of board, there are 3 types
- Internal clock
- Peripheral clock
- Bus clock

And have a look initialization values of T-Monitor - a boot loader of
T-Engine/SH7727,
ICLK_VAL:	.long	0x0060		// 96 Mhz
PCLK_VAL:	.long	0x0018		// 24 Mhz
FRQCR_VAL:	.long	0x0112		// PLL*2, IFC*1, PFC/4
RTCOR_VAL:	.long	0xa50b		// 48MHz /64 14.667us

FRQCR: frequency multipliers controller
RTCOR: reflash time constant counter

Does "outside clock" mean peripheral clock? It is 24 Mhz.

> I think that cpu_init is not carried out.
> I think that u-boot stopped on lowlevel_init function.

In lowlevel_init function, I put a LED debugging function which turn on LED
on debug board. It works.
 
	mov.l	LED_A, r1
	mov.l	LED_D, r0
	mov.b	r0, @r1

LED_A:		.long	0xA1600000		/* LED_BASE address */
LED_D:		.long	0xaa			/* mh a1600000, 00  --> ALL LED ON */

But C function in sh_generic_init() cannot work. :(

> I will get T-Engine board ......

Thank you and hope hearing good news from you.
Best regards,
-- 
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