Measurements: Massive Display-related power savings

Klaus Kurzmann mok at mnet-online.de
Fri Oct 17 14:47:37 CEST 2008


* Andy Green <andy at openmoko.com> [081017 13:31]:
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> Somebody in the thread at some point said:
>
> |> Maybe the SPI timings are now even lower.  You might want to try that.
> | What do I have to do?
>
> In arch/arm/mach-s3c2440/mach_gta02.c there's this:
>
> static struct spi_board_info gta02_spi_board_info[] = {
> 	{
> 		.modalias	= "jbt6k74",
> 		/* platform_data */
> 		.platform_data	= &jbt6k74_pdata,
> 		/* controller_data */
> 		/* irq */
> 		.max_speed_hz	= 10 * 1000 * 1000,
> 		.bus_num	= 2,
> 		/* chip_select */
> 	},
> };
>
> it means reduce the max_speed_hz from 10MHz to say 1MHz see if it
> impacts it I guess.
ok, changed .max_speed_hz to 1 * 1000 * 100, but this doesn't change the
behaviour. I still get WSoD after some time in deep-standby state.

Something else to try out ? :-)

Mok






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