See the previous version of this patchset for further context: http://www.spinics.net/lists/arm-kernel/msg252656.html
In the current patchset, the proposal is slightly different. As an example of the current status, here's an extract of a device tree: #define MBUS_ID(target,attributes) (((target) << 24) | ((attributes) << 16)) soc { compatible = "marvell,armadaxp-mbus"; reg = <0 0xd0020000 0 0x100>, <0 0xd0020180 0 0x20>; ranges = <MBUS_ID(0xf0, 0x01) 0 0 0xd0000000 0x100000 /* internal-regs */ MBUS_ID(0xf0, 0x02) 0xe0000000 0 0xe0000000 0x8100000 /* pcie */ MBUS_ID(0x01, 0x1d) 0 0 0xfff00000 0x100000 MBUS_ID(0x01, 0x2f) 0 0 0xf0000000 0x8000000>; bootrom { compatible = "marvell,bootrom"; reg = <MBUS_ID(0x01, 0x1d) 0 0x100000> }; devbus-bootcs { status = "okay"; /* NOR */ nor { compatible = "cfi-flash"; reg = <0 0x8000000>; bank-width = <2>; }; }; pcie-controller { compatible = "marvell,armada-xp-pcie"; status = "okay"; device_type = "pci"; #address-cells = <3>; #size-cells = <2>; ranges = <0x82000000 0 0x40000 MBUS_ID(0xf0, 0x01) 0x40000 0 0x00002000 /* Port 0.0 registers */ 0x82000000 0 0x42000 MBUS_ID(0xf0, 0x01) 0x42000 0 0x00002000 /* Port 2.0 registers */ 0x82000000 0 0x44000 MBUS_ID(0xf0, 0x01) 0x44000 0 0x00002000 /* Port 0.1 registers */ 0x82000000 0 0x48000 MBUS_ID(0xf0, 0x01) 0x48000 0 0x00002000 /* Port 0.2 registers */ 0x82000000 0 0x4c000 MBUS_ID(0xf0, 0x01) 0x4c000 0 0x00002000 /* Port 0.3 registers */ 0x82000000 0 0x80000 MBUS_ID(0xf0, 0x01) 0x80000 0 0x00002000 /* Port 1.0 registers */ 0x82000000 0 0x82000 MBUS_ID(0xf0, 0x01) 0x82000 0 0x00002000 /* Port 3.0 registers */ 0x82000000 0 0xe0000000 MBUS_ID(0xf0, 0x02) 0xe0000000 0 0x08000000 /* non-prefetchable memory */ 0x81000000 0 0 MBUS_ID(0xf0, 0x02) 0xe8000000 0 0x00100000>; /* downstream I/O */ pcie@1,0 { /* Port 0, Lane 0 */ status = "okay"; }; }; internal-regs { compatible = "simple-bus"; #address-cells = <1>; #size-cells = <1>; ... }; }; This patchset is based on v3.10-rc4, with Jason Cooper's mvebu/regmap branch applied, and with the mvebu-devbus commit (3edad321b1 in linux-next): "drivers: memory: Introduce Marvell EBU Device Bus driver" Changes from v3: * Fixed the pcie-controller to mbus address space translations, to match a 1:1 mapping between the PCI and CPU busses. * Fixed the binding documentation with suggestions from Arnd Bergmann. * Added a BootROM sanity check on AXP SMP initialization, as suggested by Jason Gunthorpe. This also implied changing slightly the bootrom node. * Changed the first cell format for the MBus address space. Changes from v2: * Replaced the PCIe mapping with 0xffff0002, to avoid using a representation that might correspond to a possible window id. * Remove every mbus-node 'ranges' property from the dtsi files. Having them on the per-board dts files only makes maintaince less painful. * Declare children window size, in the children 'ranges' property, as large as possible (4 GiB size) and move the property to the dtsi files. The per-board dts, does not need to declare that property now. * The MBus driver now creates the decoding window using the base address and size specified in the mbus-node, instead of using the children entries. Change from v1: * Changed the way the address spaces were declared: the window's base addresses are only present in the mbus-node ranges property. This makes sense since that information belongs only to the MBus address space. * Drop the ranges dynamic update, since now the DT translations are complete. * Replaced the internal register first cell mapping with 0xffff0001, to avoid clashing when using 0x00000000. * Replaced the PCIe mapping with 0xffff0000. Thanks a lot! Ezequiel Garcia (12): bus: mvebu-mbus: Factor out initialization details bus: mvebu-mbus: Introduce device tree binding bus: mvebu-mbus: Add static window allocation to the DT binding ARM: mvebu: Initialize MBus using the DT binding ARM: mvebu: Remove the harcoded BootROM window allocation memory: mvebu-devbus: Remove address decoding window workaround ARM: mvebu: Use the preprocessor on Armada 370/XP device tree files ARM: mvebu: Add MBus to Armada 370/XP device tree ARM: mvebu: Add BootROM to Armada 370/XP device tree ARM: mvebu: Relocate Armada 370/XP DeviceBus device tree nodes ARM: mvebu: Relocate Armada 370 PCIe device tree nodes ARM: mvebu: Relocate Armada XP PCIe device tree nodes .../devicetree/bindings/bus/mvebu-mbus.txt | 203 +++++++++++ arch/arm/boot/dts/armada-370-db.dts | 5 +- arch/arm/boot/dts/armada-370-mirabox.dts | 38 ++- arch/arm/boot/dts/armada-370-rd.dts | 5 +- arch/arm/boot/dts/armada-370-xp.dtsi | 103 +++--- arch/arm/boot/dts/armada-370.dtsi | 109 +++--- arch/arm/boot/dts/armada-xp-db.dts | 72 ++-- arch/arm/boot/dts/armada-xp-gp.dts | 107 +++--- arch/arm/boot/dts/armada-xp-mv78230.dtsi | 209 ++++++------ arch/arm/boot/dts/armada-xp-mv78260.dtsi | 247 +++++++------- arch/arm/boot/dts/armada-xp-mv78460.dtsi | 379 +++++++++++---------- arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts | 83 ++--- arch/arm/boot/dts/armada-xp.dtsi | 10 +- arch/arm/mach-mvebu/armada-370-xp.c | 34 +- arch/arm/mach-mvebu/platsmp.c | 25 +- drivers/bus/mvebu-mbus.c | 196 ++++++++++- drivers/memory/mvebu-devbus.c | 64 +--- include/linux/mbus.h | 1 + 18 files changed, 1116 insertions(+), 774 deletions(-) create mode 100644 Documentation/devicetree/bindings/bus/mvebu-mbus.txt -- 1.8.1.5 _______________________________________________ devicetree-discuss mailing list devicetree-discuss@lists.ozlabs.org https://lists.ozlabs.org/listinfo/devicetree-discuss