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[93.34.90.129]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-43d1fe0636dsm53464195e9.11.2025.03.15.08.44.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 15 Mar 2025 08:44:56 -0700 (PDT) From: Christian Marangi To: Christian Marangi , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Vladimir Oltean , Srinivas Kandagatla , Heiner Kallweit , Russell King , Maxime Chevallier , Matthias Brugger , AngeloGioacchino Del Regno , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, upstream@airoha.com Subject: [net-next PATCH v13 11/14] net: mdio: Add Airoha AN8855 Switch MDIO Passtrough Date: Sat, 15 Mar 2025 16:43:51 +0100 Message-ID: <20250315154407.26304-12-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250315154407.26304-1-ansuelsmth@gmail.com> References: <20250315154407.26304-1-ansuelsmth@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250315_084459_884044_5512B945 X-CRM114-Status: GOOD ( 21.64 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Add Airoha AN8855 Switch driver to register a MDIO passtrough as switch address is shared with the internal PHYs and require additional page handling. This requires the upper Switch MFD to be probed and init to actually work. Signed-off-by: Christian Marangi --- MAINTAINERS | 1 + drivers/net/mdio/Kconfig | 10 +++++++ drivers/net/mdio/Makefile | 1 + drivers/net/mdio/mdio-an8855.c | 49 ++++++++++++++++++++++++++++++++++ 4 files changed, 61 insertions(+) create mode 100644 drivers/net/mdio/mdio-an8855.c diff --git a/MAINTAINERS b/MAINTAINERS index aec293953382..f4c8054d3980 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -731,6 +731,7 @@ F: Documentation/devicetree/bindings/net/airoha,an8855-phy.yaml F: Documentation/devicetree/bindings/net/dsa/airoha,an8855-switch.yaml F: Documentation/devicetree/bindings/nvmem/airoha,an8855-efuse.yaml F: drivers/mfd/airoha-an8855.c +F: drivers/net/mdio/mdio-an8855.c AIROHA ETHERNET DRIVER M: Lorenzo Bianconi diff --git a/drivers/net/mdio/Kconfig b/drivers/net/mdio/Kconfig index 4a7a303be2f7..e31a37064934 100644 --- a/drivers/net/mdio/Kconfig +++ b/drivers/net/mdio/Kconfig @@ -61,6 +61,16 @@ config MDIO_XGENE This module provides a driver for the MDIO busses found in the APM X-Gene SoC's. +config MDIO_AN8855 + tristate "Airoha AN8855 Switch MDIO bus controller" + depends on MFD_AIROHA_AN8855 + depends on OF_MDIO + select MDIO_REGMAP + help + This module provides a driver for the Airoha AN8855 Switch + that requires a MDIO passtrough as switch address is shared + with the internal PHYs and requires additional page handling. + config MDIO_ASPEED tristate "ASPEED MDIO bus controller" depends on ARCH_ASPEED || COMPILE_TEST diff --git a/drivers/net/mdio/Makefile b/drivers/net/mdio/Makefile index 1015f0db4531..546c4e55b475 100644 --- a/drivers/net/mdio/Makefile +++ b/drivers/net/mdio/Makefile @@ -5,6 +5,7 @@ obj-$(CONFIG_ACPI_MDIO) += acpi_mdio.o obj-$(CONFIG_FWNODE_MDIO) += fwnode_mdio.o obj-$(CONFIG_OF_MDIO) += of_mdio.o +obj-$(CONFIG_MDIO_AN8855) += mdio-an8855.o obj-$(CONFIG_MDIO_ASPEED) += mdio-aspeed.o obj-$(CONFIG_MDIO_BCM_IPROC) += mdio-bcm-iproc.o obj-$(CONFIG_MDIO_BCM_UNIMAC) += mdio-bcm-unimac.o diff --git a/drivers/net/mdio/mdio-an8855.c b/drivers/net/mdio/mdio-an8855.c new file mode 100644 index 000000000000..22d199942f1c --- /dev/null +++ b/drivers/net/mdio/mdio-an8855.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * MDIO passthrough driver for Airoha AN8855 Switch + */ + +#include +#include +#include +#include + +static int an8855_mdio_probe(struct platform_device *pdev) +{ + struct mdio_regmap_config mrc = { }; + struct device *dev = &pdev->dev; + struct mii_bus *bus; + + mrc.regmap = dev_get_regmap(dev->parent, "phy"); + mrc.parent = dev; + mrc.valid_addr_mask = GENMASK(31, 0); + mrc.support_encoded_addr = true; + mrc.autoscan = true; + mrc.np = dev->of_node; + snprintf(mrc.name, MII_BUS_ID_SIZE, KBUILD_MODNAME); + + bus = devm_mdio_regmap_register(dev, &mrc); + if (IS_ERR(bus)) + return dev_err_probe(dev, PTR_ERR(bus), "failed to register MDIO bus\n"); + + return 0; +} + +static const struct of_device_id an8855_mdio_of_match[] = { + { .compatible = "airoha,an8855-mdio", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, an8855_mdio_of_match); + +static struct platform_driver an8855_mdio_driver = { + .probe = an8855_mdio_probe, + .driver = { + .name = "an8855-mdio", + .of_match_table = an8855_mdio_of_match, + }, +}; +module_platform_driver(an8855_mdio_driver); + +MODULE_AUTHOR("Christian Marangi "); +MODULE_DESCRIPTION("Driver for AN8855 MDIO passthrough"); +MODULE_LICENSE("GPL");