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
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