dt-bindings: PCI: mvebu: Add num-lanes property

Controller driver needs to correctly configure PCIe link if it contains 1
or 4 SerDes PCIe lanes. Therefore add a new 'num-lanes' DT property for
mvebu PCIe controller. Property 'num-lanes' seems to be de-facto standard
way how number of lanes is specified in other PCIe controllers.

Link: https://lore.kernel.org/r/20220222155030.988-5-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/pci/mvebu-pci.txt b/Documentation/devicetree/bindings/pci/mvebu-pci.txt
index 6173af6885f86731a9e81182737afc0a185cd212..24225852bce06973fc2aaad7f47076b72aeea2f2 100644 (file)
--- a/Documentation/devicetree/bindings/pci/mvebu-pci.txt
+++ b/Documentation/devicetree/bindings/pci/mvebu-pci.txt
@@ -77,6 +77,7 @@ and the following optional properties:
 - marvell,pcie-lane: the physical PCIe lane number, for ports having
   multiple lanes. If this property is not found, we assume that the
   value is 0.
+- num-lanes: number of SerDes PCIe lanes for this link (1 or 4)
 - reset-gpios: optional GPIO to PERST#
 - reset-delay-us: delay in us to wait after reset de-assertion, if not
   specified will default to 100ms, as required by the PCIe specification.
@@ -141,6 +142,7 @@ pcie-controller {
                interrupt-map = <0 0 0 0 &mpic 58>;
                marvell,pcie-port = <0>;
                marvell,pcie-lane = <0>;
+               num-lanes = <1>;
                /* low-active PERST# reset on GPIO 25 */
                reset-gpios = <&gpio0 25 1>;
                /* wait 20ms for device settle after reset deassertion */
@@ -161,6 +163,7 @@ pcie-controller {
                interrupt-map = <0 0 0 0 &mpic 59>;
                marvell,pcie-port = <0>;
                marvell,pcie-lane = <1>;
+               num-lanes = <1>;
                clocks = <&gateclk 6>;
        };
 
@@ -177,6 +180,7 @@ pcie-controller {
                interrupt-map = <0 0 0 0 &mpic 60>;
                marvell,pcie-port = <0>;
                marvell,pcie-lane = <2>;
+               num-lanes = <1>;
                clocks = <&gateclk 7>;
        };
 
@@ -193,6 +197,7 @@ pcie-controller {
                interrupt-map = <0 0 0 0 &mpic 61>;
                marvell,pcie-port = <0>;
                marvell,pcie-lane = <3>;
+               num-lanes = <1>;
                clocks = <&gateclk 8>;
        };
 
@@ -209,6 +214,7 @@ pcie-controller {
                interrupt-map = <0 0 0 0 &mpic 62>;
                marvell,pcie-port = <1>;
                marvell,pcie-lane = <0>;
+               num-lanes = <1>;
                clocks = <&gateclk 9>;
        };
 
@@ -225,6 +231,7 @@ pcie-controller {
                interrupt-map = <0 0 0 0 &mpic 63>;
                marvell,pcie-port = <1>;
                marvell,pcie-lane = <1>;
+               num-lanes = <1>;
                clocks = <&gateclk 10>;
        };
 
@@ -241,6 +248,7 @@ pcie-controller {
                interrupt-map = <0 0 0 0 &mpic 64>;
                marvell,pcie-port = <1>;
                marvell,pcie-lane = <2>;
+               num-lanes = <1>;
                clocks = <&gateclk 11>;
        };
 
@@ -257,6 +265,7 @@ pcie-controller {
                interrupt-map = <0 0 0 0 &mpic 65>;
                marvell,pcie-port = <1>;
                marvell,pcie-lane = <3>;
+               num-lanes = <1>;
                clocks = <&gateclk 12>;
        };
 
@@ -273,6 +282,7 @@ pcie-controller {
                interrupt-map = <0 0 0 0 &mpic 99>;
                marvell,pcie-port = <2>;
                marvell,pcie-lane = <0>;
+               num-lanes = <1>;
                clocks = <&gateclk 26>;
        };
 
@@ -289,6 +299,7 @@ pcie-controller {
                interrupt-map = <0 0 0 0 &mpic 103>;
                marvell,pcie-port = <3>;
                marvell,pcie-lane = <0>;
+               num-lanes = <1>;
                clocks = <&gateclk 27>;
        };
 };