diff mbox

[v2,3/3] PCI: iproc: Implement optional property prsnt-gpios

Message ID 1502776547-30542-4-git-send-email-oza.oza@broadcom.com (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Oza Pawandeep Aug. 15, 2017, 5:55 a.m. UTC
Add description for optional device tree property
'prsnt-gpios' for PCI hotplug feature.

Signed-off-by: Oza Pawandeep <oza.oza@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>

Comments

Rob Herring (Arm) Aug. 17, 2017, 8:59 p.m. UTC | #1
On Tue, Aug 15, 2017 at 11:25:47AM +0530, Oza Pawandeep wrote:
> Add description for optional device tree property
> 'prsnt-gpios' for PCI hotplug feature.
> 
> Signed-off-by: Oza Pawandeep <oza.oza@broadcom.com>
> Reviewed-by: Ray Jui <ray.jui@broadcom.com>

Acked-by: Rob Herring <robh@kernel.org>
diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
index b8e48b4..0c5f631 100644
--- a/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
+++ b/Documentation/devicetree/bindings/pci/brcm,iproc-pcie.txt
@@ -72,6 +72,20 @@  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
 
+Optional properties:
+- slot-pluggable: PCI hotplug feature is supported.
+- prsnt-gpios: Array of gpios, needs to be present if Hotplug is supported.
+
+Refer to the following binding documents for more detailed description on
+the use of 'slot-pluggable' and 'prsnt-gpios'.
+  Documentation/devicetree/bindings/pci/pci.txt
+
+Example:
+prsnt-gpios: <&pca9505 32 1>, <&pca9505 33 1>;
+This is x4 connector: monitoring max 2 present lines.
+prsnt-gpios: <&pca9505 32 1>, <&pca9505 33 1>, <&pca9505 34 1>;
+This is x8 connector: monitoring max 3 present lines.
+
 Example:
 	pcie0: pcie@18012000 {
 		compatible = "brcm,iproc-pcie";