diff options
Diffstat (limited to 'target/linux/bcm53xx/patches-4.4/152-PCI-iproc-Add-iProc-PCIe-MSI-device-tree-binding.patch')
| -rw-r--r-- | target/linux/bcm53xx/patches-4.4/152-PCI-iproc-Add-iProc-PCIe-MSI-device-tree-binding.patch | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-4.4/152-PCI-iproc-Add-iProc-PCIe-MSI-device-tree-binding.patch b/target/linux/bcm53xx/patches-4.4/152-PCI-iproc-Add-iProc-PCIe-MSI-device-tree-binding.patch new file mode 100644 index 0000000000..f0b0031237 --- /dev/null +++ b/target/linux/bcm53xx/patches-4.4/152-PCI-iproc-Add-iProc-PCIe-MSI-device-tree-binding.patch @@ -0,0 +1,67 @@ +From 96b40de5e36ec479dabb88500f1830a87818a809 Mon Sep 17 00:00:00 2001 +From: Ray Jui <rjui@broadcom.com> +Date: Mon, 16 Nov 2015 17:57:33 -0800 +Subject: [PATCH 152/154] PCI: iproc: Add iProc PCIe MSI device tree binding + +This patch updates the iProc PCIe device tree bindings with added +binding information for MSI + +Signed-off-by: Ray Jui <rjui@broadcom.com> +Reviewed-by: Anup Patel <anup.patel@broadcom.com> +Reviewed-by: Vikram Prakash <vikramp@broadcom.com> +Reviewed-by: Scott Branden <sbranden@broadcom.com> +--- + .../devicetree/bindings/pci/brcm,iproc-pcie.txt | 35 ++++++++++++++++++++++ + 1 file changed, 35 insertions(+) + +--- a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt ++++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt +@@ -35,6 +35,28 @@ Optional: + - brcm,pcie-ob-oarr-size: Some iProc SoCs need the OARR size bit to be set to + increase the outbound window size + ++MSI support (optional): ++ ++For older platforms without MSI integrated in the GIC, iProc PCIe core provides ++an event queue based MSI support. The iProc MSI uses host memories to store ++MSI posted writes in the event queues ++ ++- msi-parent: Link to the device node of the MSI controller. On newer iProc ++platforms, the MSI controller may be gicv2m or gicv3-its. On older iProc ++platforms without MSI support in its interrupt controller, one may use the ++event queue based MSI support integrated within the iProc PCIe core ++ ++When the iProc event queue based MSI is used, one needs to define the ++following properties in the MSI device node: ++- compatible: Must be "brcm,iproc-msi" ++- msi-controller: claims itself as an MSI controller ++- interrupt-parent: Link to its parent interrupt device ++- interrupts: List of interrupt IDs from its parent interrupt device ++ ++Optional properties: ++- brcm,pcie-msi-inten: Needs to be present for some older iProc platforms that ++require the interrupt enable registers to be set explicitly to enable MSI ++ + Example: + pcie0: pcie@18012000 { + compatible = "brcm,iproc-pcie"; +@@ -61,6 +83,19 @@ Example: + brcm,pcie-ob-oarr-size; + brcm,pcie-ob-axi-offset = <0x00000000>; + brcm,pcie-ob-window-size = <256>; ++ ++ msi-parent = <&msi0>; ++ ++ /* iProc event queue based MSI */ ++ msi0: msi@18012000 { ++ compatible = "brcm,iproc-msi"; ++ msi-controller; ++ interrupt-parent = <&gic>; ++ interrupts = <GIC_SPI 96 IRQ_TYPE_NONE>, ++ <GIC_SPI 97 IRQ_TYPE_NONE>, ++ <GIC_SPI 98 IRQ_TYPE_NONE>, ++ <GIC_SPI 99 IRQ_TYPE_NONE>, ++ }; + }; + + pcie1: pcie@18013000 { |