On Wednesday 09 April 2014 14:58:48, One Thousand Gnomes wrote: > > I'm getting curious: How can I use device-tree on x86(_64)? > > Reading the dependencies from CONFIG_OF it can only be used on 32bit systems with some special hardware bases. > > So, how to use otherwise? > > There isn't any fundamental thing tying device tree to a given > architecture or 32bitness, it's just that sane PC architectures use ACPI > to enumerate devices, and/or have a discoverable bus architecture. > > Some of the phones don't so this now becoems a point of consideration. In > fact it's already also used on CE4100 (which is an embedded media SoC > found in some TV devices and set-top boxes) and on the OLPC (One laptop > per child). There is no intrinsic reason it couldn't be used in other x86 > special cases. > > If its PC shaped however it probably has ACPI and ACPI and DT are not a > 1:1 mapping. ACPI has method invocations, and various firmware provided > interfaces such as the EC, Device tree is better at some other bits. Yep, like SPI devices on embedded x86 hardware. > Converting the phones to embedded device tree rather than adding a > billion little platform files on the other hand seems to me like a > no-brainer. I found http://thread.gmane.org/gmane.linux.drivers.devicetree/4475. Why didn't that get into mainline? Best regards, Alexander -- Dipl.-Inf. Alexander Stein SYS TEC electronic GmbH Am Windrad 2 08468 Heinsdorfergrund Tel.: 03765 38600-1156 Fax: 03765 38600-4100 Email: alexander.stein@xxxxxxxxxxxxxxxxxxxxx Website: www.systec-electronic.com Managing Director: Dipl.-Phys. Siegmar Schmidt Commercial registry: Amtsgericht Chemnitz, HRB 28082 -- To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
