netdev - [RFC net-next 3/3] dt-bindings: marvell,prestera: Add address mapping for Prestera Switchdev PCIe driver

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Message-ID: <20200225163025.9430-4-vadym.kochan@plvision.eu>
Date:   Tue, 25 Feb 2020 16:30:56 +0000
From:   Vadym Kochan <vadym.kochan@...ision.eu>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>
CC:     Vadym Kochan <vadym.kochan@...ision.eu>,
        Oleksandr Mazur <oleksandr.mazur@...ision.eu>,
        Taras Chornyi <taras.chornyi@...ision.eu>,
        Serhiy Boiko <serhiy.boiko@...ision.eu>,
        Andrii Savka <andrii.savka@...ision.eu>,
        Volodymyr Mytnyk <volodymyr.mytnyk@...ision.eu>
Subject: [RFC net-next 3/3] dt-bindings: marvell,prestera: Add address mapping
 for Prestera Switchdev PCIe driver

Document requirement for the PCI port which is connected to the ASIC, to
allow access to the firmware related registers.

Signed-off-by: Vadym Kochan <vadym.kochan@...ision.eu>
---
 .../devicetree/bindings/net/marvell,prestera.txt    | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/marvell,prestera.txt b/Documentation/devicetree/bindings/net/marvell,prestera.txt
index 83370ebf5b89..103c35cfa8a7 100644
--- a/Documentation/devicetree/bindings/net/marvell,prestera.txt
+++ b/Documentation/devicetree/bindings/net/marvell,prestera.txt
@@ -45,3 +45,16 @@ dfx-server {
 	ranges = <0 MBUS_ID(0x08, 0x00) 0 0x100000>;
 	reg = <MBUS_ID(0x08, 0x00) 0 0x100000>;
 };
+
+Marvell Prestera SwitchDev bindings
+-----------------------------------
+The current implementation of Prestera Switchdev PCI interface driver requires
+that BAR2 is assigned to 0xf6000000 as base address from the PCI IO range:
+
+&cp0_pcie0 {
+	ranges = <0x81000000 0x0 0xfb000000 0x0 0xfb000000 0x0 0xf0000
+		0x82000000 0x0 0xf6000000 0x0 0xf6000000 0x0 0x2000000
+		0x82000000 0x0 0xf9000000 0x0 0xf9000000 0x0 0x100000>;
+	phys = <&cp0_comphy0 0>;
+	status = "okay";
+};
-- 
2.17.1