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| author |   Jim Quinlan <jim2101024@gmail.com> | 2021-12-09 15:47:25 -0500 |
|---|---|---|
| committer |   Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2022-01-11 11:55:41 +0100 |
| commit | aa8589aac8e335e5e2e9a9de72a53913892e92f9 (patch) | |
| tree | 560612b0334115ade06c0c4b592d0b9c8a6f656b /drivers/pci/controller/Kconfig | |
| parent | MIPS: bmips: Remove obsolete DMA mapping support (diff) | |
| download | wireguard-linux-aa8589aac8e335e5e2e9a9de72a53913892e92f9.tar.xz wireguard-linux-aa8589aac8e335e5e2e9a9de72a53913892e92f9.zip | |
PCI: brcmstb: Augment driver for MIPs SOCs
The current brcmstb driver works for Arm and Arm64. A few things are
modified here for us to support MIPs as well.
o There are four outbound range register groups and each directs a window
of up to 128MB. Even though there are four 128MB DT "ranges" in the
bmips PCIe DT node, these ranges are contiguous and are collapsed into
a single range by the OF range parser. Now the driver assumes a single
range -- for MIPs only -- and splits it back into 128MB sizes.
o For bcm7425, the config space accesses must be 32-bit reads or
writes. In addition, the 4k config space register array is missing
and not used.
o The registers for the upper 32-bits of the outbound window address do
not exist.
o Burst size must be set to 256 (this refers to an internal bus).
Signed-off-by: Jim Quinlan <jim2101024@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'drivers/pci/controller/Kconfig')
| -rw-r--r-- | drivers/pci/controller/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig index 93b141110537..4ac474d4a956 100644 --- a/drivers/pci/controller/Kconfig +++ b/drivers/pci/controller/Kconfig @@ -274,7 +274,7 @@ config PCIE_BRCMSTB BMIPS_GENERIC || COMPILE_TEST depends on OF depends on PCI_MSI_IRQ_DOMAIN - default ARCH_BRCMSTB + default ARCH_BRCMSTB || BMIPS_GENERIC help Say Y here to enable PCIe host controller support for Broadcom STB based SoCs, like the Raspberry Pi 4. |