On Fri, Sep 12, 2014 at 03:43:36PM -0400, Jon Masters wrote: > On 09/12/2014 10:00 AM, Hanjun Guo wrote: > > From: Graeme Gregory <graeme.gregory@xxxxxxxxxx> > > > > ACPI 5.1 does not currently support S states for ARM64 hardware but > > ACPI code will call acpi_target_system_state() for device power > > managment, so introduce sleep-arm.c to allow other drivers to function > > until S states are defined. > > Aside: ACPI5.1 does define the Platform Communication Channel and CPC > (Collaborative Processor Performance Control). Some details need to be > fleshed out there for practical 64-bit ARMv8 server systems, but the > underpinnings and mechanisms are in place in the 5.1 specification that > can be built upon over time to achieve practical S-State equivalence. > Disagree, S-States are about going to sleep or hibernating, that is nothing to do with CPU Performance. Graeme -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
