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Fri, 10 Jul 2020 16:31:47 +0000 From: Calvin Johnson To: Jeremy Linton , Russell King - ARM Linux admin , Jon , Cristi Sovaiala , Ioana Ciornei , Andrew Lunn , Andy Shevchenko , Florian Fainelli , Madalin Bucur Cc: netdev@vger.kernel.org, linux.cj@gmail.com, linux-acpi@vger.kernel.org, Calvin Johnson Subject: [net-next PATCH v5 1/6] Documentation: ACPI: DSD: Document MDIO PHY Date: Fri, 10 Jul 2020 22:01:10 +0530 Message-Id: <20200710163115.2740-2-calvin.johnson@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200710163115.2740-1-calvin.johnson@oss.nxp.com> References: <20200710163115.2740-1-calvin.johnson@oss.nxp.com> X-ClientProxiedBy: SG2PR06CA0137.apcprd06.prod.outlook.com (2603:1096:1:1f::15) To AM0PR04MB5636.eurprd04.prod.outlook.com (2603:10a6:208:130::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from lsv03152.swis.in-blr01.nxp.com (14.142.151.118) by SG2PR06CA0137.apcprd06.prod.outlook.com (2603:1096:1:1f::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3174.20 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 04967d99-1ada-4347-1c17-08d824eebd9f X-MS-Exchange-CrossTenant-AuthSource: AM0PR04MB5636.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Jul 2020 16:31:47.6611 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: nmw9nzSNOUyrqHgiFyTsM91YKWRWQbCsxMa/+OxvX0aonnCXQFCs7GIs+yo6VXpYKHBKFnxUutnNPdGJXqXW6w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR0402MB3908 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Introduce ACPI mechanism to get PHYs registered on a MDIO bus and provide them to be connected to MAC. An ACPI node property "mdio-handle" is introduced to reference the MDIO bus on which PHYs are registered with autoprobing method used by mdiobus_register(). Describe properties "phy-channel" and "phy-mode" Signed-off-by: Calvin Johnson --- Changes in v5: None Changes in v4: None Changes in v3: - cleanup based on v2 comments - Added description for more properties - Added MDIO node DSDT entry Changes in v2: None Documentation/firmware-guide/acpi/dsd/phy.rst | 90 +++++++++++++++++++ 1 file changed, 90 insertions(+) create mode 100644 Documentation/firmware-guide/acpi/dsd/phy.rst diff --git a/Documentation/firmware-guide/acpi/dsd/phy.rst b/Documentation/firmware-guide/acpi/dsd/phy.rst new file mode 100644 index 000000000000..0132fee10b45 --- /dev/null +++ b/Documentation/firmware-guide/acpi/dsd/phy.rst @@ -0,0 +1,90 @@ +.. SPDX-License-Identifier: GPL-2.0 + +========================= +MDIO bus and PHYs in ACPI +========================= + +The PHYs on an mdiobus are probed and registered using mdiobus_register(). +Later, for connecting these PHYs to MAC, the PHYs registered on the +mdiobus have to be referenced. + +mdio-handle +----------- +For each MAC node, a property "mdio-handle" is used to reference the +MDIO bus on which the PHYs are registered. On getting hold of the MDIO +bus, use find_phy_device() to get the PHY connected to the MAC. + +phy-channel +----------- +Property "phy-channel" defines the address of the PHY on the mdiobus. + +phy-mode +-------- +Property "phy-mode" defines the type of PHY interface. + +An example of this is shown below:: + +DSDT entry for MAC where MDIO node is referenced +------------------------------------------------ + Scope(\_SB.MCE0.PR17) // 1G + { + Name (_DSD, Package () { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + Package () {"phy-channel", 1}, + Package () {"phy-mode", "rgmii-id"}, + Package () {"mdio-handle", Package (){\_SB.MDI0}} + } + }) + } + + Scope(\_SB.MCE0.PR18) // 1G + { + Name (_DSD, Package () { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + Package () {"phy-channel", 2}, + Package () {"phy-mode", "rgmii-id"}, + Package () {"mdio-handle", Package (){\_SB.MDI0}} + } + }) + } + +DSDT entry for MDIO node +------------------------ +a) Silicon Component +-------------------- + Scope(_SB) + { + Device(MDI0) { + Name(_HID, "NXP0006") + Name(_CCA, 1) + Name(_UID, 0) + Name(_CRS, ResourceTemplate() { + Memory32Fixed(ReadWrite, MDI0_BASE, MDI_LEN) + Interrupt(ResourceConsumer, Level, ActiveHigh, Shared) + { + MDI0_IT + } + }) // end of _CRS for MDI0 + Name (_DSD, Package () { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + Package () {"little-endian", 1}, + } + }) + } // end of MDI0 + } + +b) Platform Component +--------------------- + Scope(\_SB.MDI0) + { + Device(PHY1) { + Name (_ADR, 0x1) + } // end of PHY1 + + Device(PHY2) { + Name (_ADR, 0x2) + } // end of PHY2 + }