On Thursday 08 August 2013 02:16 PM, Kevin Hilman wrote: > Dave Gerlach <d-gerlach@xxxxxx> writes: > >> From: Vaibhav Bedia <vaibhav.bedia@xxxxxx> >> >> SDRAM controller on AM33XX requires that a modification of certain >> bit-fields in PWR_MGMT_CTRL register (ref. section 7.3.5.13 in >> AM335x-Rev H) is followed by a dummy read access to SDRAM. This >> scenario arises when entering a low power state like DeepSleep. >> To ensure that the read is not from a cached region we reserve >> some memory during bootup using the arm_memblock_steal() API. > > Hmm, sounds to me an awful lot like the existing omap_bus_sync() ? > All the credit of that awful omap_bus_sync() goes to me since I introduced it. And I keep beating the hardware guys who have not left a choice but to introduce the ugly work around in software. ;-) Regards, Santosh -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
