linux-kernel - [PATCH 1/2] dt-bindings: phy: Add binding doc for Stingray PCIe PHY

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Message-Id: <1526495010-2478-2-git-send-email-ray.jui@broadcom.com>
Date:   Wed, 16 May 2018 11:23:29 -0700
From:   Ray Jui <ray.jui@...adcom.com>
To:     Kishon Vijay Abraham I <kishon@...com>
Cc:     linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Ray Jui <ray.jui@...adcom.com>
Subject: [PATCH 1/2] dt-bindings: phy: Add binding doc for Stingray PCIe PHY

Add binding document for Stingray PCIe PHYs for both PAXB and PAXC based
root complex

Signed-off-by: Ray Jui <ray.jui@...adcom.com>
Reviewed-by: Scott Branden <scott.branden@...adcom.com>
---
 .../devicetree/bindings/phy/brcm,sr-pcie-phy.txt   | 39 ++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/brcm,sr-pcie-phy.txt

diff --git a/Documentation/devicetree/bindings/phy/brcm,sr-pcie-phy.txt b/Documentation/devicetree/bindings/phy/brcm,sr-pcie-phy.txt
new file mode 100644
index 0000000..c2eede6
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/brcm,sr-pcie-phy.txt
@@ -0,0 +1,39 @@
+Broadcom Stingray PCIe PHY
+
+Required properties:
+- compatible: must be "brcm,sr-pcie-phy"
+- brcm,sr-cdru: phandle to the CDRU syscon node
+- brcm,sr-mhb: phandle to the MHB syscon node
+- #phy-cells: Must be 1, denotes the PHY index
+
+For PAXB based root complex, one can have a configuration of up to 8 PHYs
+PHY index goes from 0 to 7
+
+For the internal PAXC based root complex, PHY index is always 8
+
+Example:
+	mhb: syscon@...01000 {
+		compatible = "brcm,sr-mhb", "syscon";
+		reg = <0 0x60401000 0 0x38c>;
+	};
+
+	cdru: syscon@...1d000 {
+		compatible = "brcm,sr-cdru", "syscon";
+		reg = <0 0x6641d000 0 0x400>;
+	};
+
+	pcie_phy: phy {
+		compatible = "brcm,sr-pcie-phy";
+		brcm,sr-cdru = <&cdru>;
+		brcm,sr-mhb = <&mhb>;
+		#phy-cells = <1>;
+	};
+
+	/* users of the PCIe PHY */
+
+	pcie0: pcie@...00000 {
+		...
+		...
+		phys = <&pcie_phy 0>;
+		phy-names = "pcie-phy";
+	};
-- 
2.1.4