On Tue, Apr 16, 2013 at 03:41:46AM +0100, Simon Horman wrote: > On Mon, Apr 15, 2013 at 05:13:22PM +0100, Lorenzo Pieralisi wrote: > > In order to extend the current cpu nodes bindings to newer CPUs > > inclusive of AArch64 and to update support for older ARM CPUs this > > patch updates device tree documentation for the cpu nodes bindings. > > > > Main changes: > > > > - adds 64-bit bindings (inclusive of cpus node #address-cells updates) > > - defines behaviour on pre and post v7 uniprocessor systems > > - adds ARM 11MPcore specific reg property definition > > > > DT cpu map parsing code must be made compliant with the latest bindings > > updates, hence this patch also updates the arm_dt_init_cpu_maps() function > > with checks and additional parsing rules. > > > > Uniprocessor systems predating v7 do not parse the cpus node at all > > since the reg property is meaningless on those systems. > > > > Device trees for 64-bit systems can be taken as device tree input also > > for 64-bit CPUs running in 32-bit mode. The code checks that the reg entries > > are zeroed as required in the respective fields and detects automatically > > the cpus node #address-cells value so that device tree written for > > 64-bit ARM platforms (cpus #address-cells == 2) can still be taken as > > input. The correct device tree entries are to be set up by the boot > > loader, kernel code just checks that device tree entries in the cpus > > node are as expected for a 32-bit CPU (reg[63:24] == 0). > > > > cpu node entries with invalid reg property or containing duplicates are > > ignored and the device tree parsing is not stopped anymore when such > > entries are encountered, the device tree cpu entry is just skipped. > > > > A device tree with cpu nodes missing the boot CPU MPIDR is considered a > > hard error and the kernel flags this up as a bug to force firmware updates. > > > > The updates to cpus/cpu node bindings for ARM require all in-kernel dts > > files > > present in the mainline to be made compliant to the latest specification. > > > > This patch also updates ARM in-kernel non-compliant dts files to the latest > > cpus/cpu nodes bindings specification. > > > > Signed-off-by: Lorenzo Pieralisi <[email protected]> > > --- > > Documentation/devicetree/bindings/arm/cpus.txt | 335 > > +++++++++++++++++++++---- > > arch/arm/boot/dts/exynos5440.dtsi | 7 + > > arch/arm/boot/dts/omap3.dtsi | 4 + > > arch/arm/boot/dts/omap4.dtsi | 5 + > > arch/arm/boot/dts/omap5.dtsi | 5 + > > arch/arm/boot/dts/r8a7740.dtsi | 3 + > > arch/arm/boot/dts/sh7372.dtsi | 4 + > > I would prefer if the SoC updates, in particular the sh7372 portion, > was a separate patch.
Ok, I will split the patch accordingly. Thanks, Lorenzo _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
