Hi Orjan, On Wed, Nov 10, 2010 at 09:55:21AM +0100, Orjan Friberg wrote: > In sdrc_init in board-beagle.c both > > writel(0x1A, SDRC_REG(SYSCONFIG)); > > and > > writel(0x18, SDRC_REG(SYSCONFIG)); > > sets bits 4:3 in the IDLEMODE field. The OMAP3 TRM (spruf98k) defines > 0x2 as the only valid value for this field, all others being marked as > "reserved - do not use". board-omap3evm.c does the same thing, > board-sdp343x.c does not. > > Anyone knows where these settings come from? Derived from an older > version of the TRM? (I'm thinking there may have been a feature that > was discovered to be unreliable or not working as intended so it was > removed from the docs.) I have no idea. I'm pretty sure though that the value has been copied from some version of U-Boot or Xloader. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
