On Wed, Feb 19, 2014 at 11:14:54PM +0100, Gregory CLEMENT wrote: > Hello, > > This patch set makes the use of the of PCI address translator less > restrictive. At the end it will allow to use the mvebu_get_soc_id > unconditionally. > > The mvebu SoC (such as Kirkwood, Dove or Armada XP for instance) come > with an IP of a PCI controller. The ID and the revision of a SoC are > stored in the registers of this controller. Being able to get this > information allows to deals with errata more dynamically. > > To manage to read this information, we need to map the registers, and > for this we need to use the of PCI translator which depend of the PCI > support. > > However there are mvebu board without any PCI devices, and where > selecting the PCI support would be useless. > > Moreover translating an address from a PCI node of the device-tree > into a CPU physical address doesn't require the core PCI > support. Those translations are just related to the device tree > itself. > > The 1st patch introduces a new config symbol: OF_ADDRESS_PCI, which > will be selected as soon as PCI will be selected, so we remains in the > same situation the current code. It should go to the of tree. > > The 2nd patch selects OF_ADDRESS_PCI as soon as ARCH_MVEBU will be > selected. This will make mvebu_get_soc_id available even without the > PCI support. It should go to the mvebu tree. > > Thanks, > > Gregory CLEMENT (2): > of: Allows to use the PCI translator without the PCI core > ARM: mvebu: Allows to get the SoC ID even without PCI enabled > > arch/arm/mach-mvebu/Kconfig | 1 + > drivers/of/Kconfig | 4 ++++ > drivers/of/address.c | 8 +++++--- > 3 files changed, 10 insertions(+), 3 deletions(-) > > -- > 1.8.1.2 > On XP GP and CONFIG_PCI=n, without the patches I get this: mvebu-soc-id: cannot map registers and after applying the patches I have: mvebu-soc-id: MVEBU SoC ID=0x7846, Rev=0x2 Tested-by: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx> Reviewed-by: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx> Thanks for taking care of this. -- Ezequiel García, Free Electrons Embedded Linux, Kernel and Android Engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
