[U-Boot] [PATCH 2/2] ARM: omap3: add support to Technexion twister board

[Stefano Babic]

On 23/11/2011 15:18, Igor Grinberg wrote:
> 
> Sorry, missed the below in the first reply
> 

It does not matter...

>> +int board_init(void)
>> +{
>> +	gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
>> +
>> +	/* boot param addr */
>> +	gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
>> +
>> +	writel(0x00000000, &gpmc_cfg->cs[1].config1);
>> +	writel(0x001e1e01, &gpmc_cfg->cs[1].config2);
>> +	writel(0x00080300, &gpmc_cfg->cs[1].config3);
>> +	writel(0x1c091c09, &gpmc_cfg->cs[1].config4);
>> +	writel(0x04181f1f, &gpmc_cfg->cs[1].config5);
>> +	writel(0x00000FCF, &gpmc_cfg->cs[1].config6);
>> +	writel(0x00000f61, &gpmc_cfg->cs[1].config7);
>> +
>> +	writel(0x00000000, &gpmc_cfg->cs[3].config1);
>> +	writel(0x001e1e01, &gpmc_cfg->cs[3].config2);
>> +	writel(0x00080300, &gpmc_cfg->cs[3].config3);
>> +	writel(0x1c091c09, &gpmc_cfg->cs[3].config4);
>> +	writel(0x04181f1f, &gpmc_cfg->cs[3].config5);
>> +	writel(0x00000FCF, &gpmc_cfg->cs[3].config6);
>> +	writel(0x00000f63, &gpmc_cfg->cs[3].config7);
> 
> Can there be an explanation of what's that and why is it needed?

They are for a UART Controller (XR16L2751) and for the seconfd ethernet
controller (SMC911X). I will explain this.

> Also, it looks like you are writing the same values to both chip selects.

Why not ? The setup sets some relaxing time for both of them

> Can enable_gpmc_cs_config() function be used here as well and
> the values documented (e.g. NET_GPMC_CONFIGx)?

Sure...the name NET_GPMC_CONFIG is quite misleading, the setup for a
chip select has nothing to do with the NET. I see that on other boards
this defines are always used to set the chipselect for an ethernet
controller, but it is not a rule..

Best regards,
Stefano Babic

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