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[90.63.244.31]) by smtp.googlemail.com with ESMTPSA id u12-20020a05600c19cc00b003db0ee277b2sm18735802wmq.5.2023.01.30.07.16.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Jan 2023 07:16:24 -0800 (PST) From: Jerome Brunet To: netdev@vger.kernel.org, devicetree@vger.kernel.org Cc: Jerome Brunet , linux-amlogic@lists.infradead.org, Kevin Hilman , Neil Armstrong , Da Xue , Rob Herring , Krzysztof Kozlowski , linux-kernel@vger.kernel.org, Krzysztof Kozlowski Subject: [PATCH v2 net-next 1/2] dt-bindings: net: add amlogic gxl mdio multiplexer Date: Mon, 30 Jan 2023 16:16:15 +0100 Message-Id: <20230130151616.375168-2-jbrunet@baylibre.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230130151616.375168-1-jbrunet@baylibre.com> References: <20230130151616.375168-1-jbrunet@baylibre.com> MIME-Version: 1.0 X-Patchwork-Bot: notify Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add documentation for the MDIO bus multiplexer found on the Amlogic GXL SoC family Reviewed-by: Krzysztof Kozlowski Signed-off-by: Jerome Brunet --- .../bindings/net/amlogic,gxl-mdio-mux.yaml | 64 +++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/amlogic,gxl-mdio-= mux.yaml diff --git a/Documentation/devicetree/bindings/net/amlogic,gxl-mdio-mux.yam= l b/Documentation/devicetree/bindings/net/amlogic,gxl-mdio-mux.yaml new file mode 100644 index 000000000000..27ae004dbea0 --- /dev/null +++ b/Documentation/devicetree/bindings/net/amlogic,gxl-mdio-mux.yaml @@ -0,0 +1,64 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/net/amlogic,gxl-mdio-mux.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Amlogic GXL MDIO bus multiplexer + +maintainers: + - Jerome Brunet + +description: + This is a special case of a MDIO bus multiplexer. It allows to choose be= tween + the internal mdio bus leading to the embedded 10/100 PHY or the external + MDIO bus on the Amlogic GXL SoC family. + +allOf: + - $ref: mdio-mux.yaml# + +properties: + compatible: + const: amlogic,gxl-mdio-mux + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + clock-names: + items: + - const: ref + +required: + - compatible + - reg + - clocks + - clock-names + +unevaluatedProperties: false + +examples: + - | + eth_phy_mux: mdio@558 { + compatible =3D "amlogic,gxl-mdio-mux"; + reg =3D <0x558 0xc>; + #address-cells =3D <1>; + #size-cells =3D <0>; + clocks =3D <&refclk>; + clock-names =3D "ref"; + mdio-parent-bus =3D <&mdio0>; + + external_mdio: mdio@0 { + reg =3D <0x0>; + #address-cells =3D <1>; + #size-cells =3D <0>; + }; + + internal_mdio: mdio@1 { + reg =3D <0x1>; + #address-cells =3D <1>; + #size-cells =3D <0>; + }; + }; --=20 2.39.0 From nobody Thu May 16 21:28:15 2024 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 34ECDC54EED for ; Mon, 30 Jan 2023 15:17:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238119AbjA3PRJ (ORCPT ); Mon, 30 Jan 2023 10:17:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57154 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237887AbjA3PQx (ORCPT ); Mon, 30 Jan 2023 10:16:53 -0500 Received: from mail-wm1-x336.google.com (mail-wm1-x336.google.com [IPv6:2a00:1450:4864:20::336]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 284DD367EF for ; Mon, 30 Jan 2023 07:16:31 -0800 (PST) Received: by mail-wm1-x336.google.com with SMTP id iv8-20020a05600c548800b003db04a0a46bso8966738wmb.0 for ; Mon, 30 Jan 2023 07:16:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=cyC0WPiESVFATZgdkk9pkTr4ui49YzPabZztaAdxpeA=; b=H4mXe/vo/lr7dTr9p6kfKeuOyyEgETFP+/ki0D99l4xb14APKN8+cfkmRyVp20QkvH RAVgEma2eqZp+SGaakRv+DyUYmGASnODJnH0Jfy/62URsADj0mhsKCf5F2SecRpu2l7G NL1zrAP/rCGVnTU2+RceRTOo2yaZHEZsPclFB6HfbNMrCpndXKytwm/Kw977S9ANneCg eHw7sUv5eWbo9u6cjOWkq3koIEnr5HGy1FLvbJSfxC0lkJcxCt37Imb4WgnE6gec0U/I YCT5QkWXnwO8hB49VFIlqaxMjRpVYJhhGxlO3mjGJMgeNc18K+fbntCD+U5y9qsAEtuZ jiMQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=cyC0WPiESVFATZgdkk9pkTr4ui49YzPabZztaAdxpeA=; b=IIgyKYf3ieoinK4DYmVG+3CxXHFhWz+QqNahjstBXdL84+h8CaLe7SgAkZdAs0vunA XS9wxGGxKW6x8wcFZGymmo+1vW6SO6gA+gDYTG5nS+vnGgCj2VXdgElrRIqQNPOkE8TH hzkUkSGKhcorPTQuQdIxnNPvzYQ3LZ1WSWv2A46NYF4cPcKjM9vm80DtutBr1Iym6Aqr HgTcEQ4LCs3KtlidwUKVL+HrE9YJrWYmSwwmKWc9gyZzmYuJFk3XeK3E2iDE9Q8kq+x+ 99NfjsFYI547aaolZYsuAuAEu+4DNXHIZUpwR0eaLSKsouPnko4dp8bqSM4uOEDHfoBq IgOQ== X-Gm-Message-State: AO0yUKXIikcWkYDe9kgtRaS2y2gEg6TUZCcNjGB/cB/Rz+p05N3NgPii Mzzi9Fu6yWDVotvV0Nlm6FlLFw== X-Google-Smtp-Source: AK7set+iSv4SoypTeDtrUTj78tmVgk0ig3A61r9Gs7gXD6xA1NkAgzeiEYDRuZCPpajWX5wOJmcTFg== X-Received: by 2002:a05:600c:21d5:b0:3dc:50c2:cc1 with SMTP id x21-20020a05600c21d500b003dc50c20cc1mr7092137wmj.23.1675091786745; Mon, 30 Jan 2023 07:16:26 -0800 (PST) Received: from jackdaw.baylibre (laubervilliers-658-1-213-31.w90-63.abo.wanadoo.fr. [90.63.244.31]) by smtp.googlemail.com with ESMTPSA id u12-20020a05600c19cc00b003db0ee277b2sm18735802wmq.5.2023.01.30.07.16.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Jan 2023 07:16:26 -0800 (PST) From: Jerome Brunet To: netdev@vger.kernel.org, devicetree@vger.kernel.org Cc: Jerome Brunet , linux-amlogic@lists.infradead.org, Kevin Hilman , Neil Armstrong , Da Xue , Rob Herring , Krzysztof Kozlowski , linux-kernel@vger.kernel.org Subject: [PATCH v2 net-next 2/2] net: mdio: add amlogic gxl mdio mux support Date: Mon, 30 Jan 2023 16:16:16 +0100 Message-Id: <20230130151616.375168-3-jbrunet@baylibre.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230130151616.375168-1-jbrunet@baylibre.com> References: <20230130151616.375168-1-jbrunet@baylibre.com> MIME-Version: 1.0 X-Patchwork-Bot: notify Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add support for the mdio mux and internal phy glue of the GXL SoC family Reported-by: Da Xue Signed-off-by: Jerome Brunet Reviewed-by: Andrew Lunn --- drivers/net/mdio/Kconfig | 11 ++ drivers/net/mdio/Makefile | 1 + drivers/net/mdio/mdio-mux-meson-gxl.c | 164 ++++++++++++++++++++++++++ 3 files changed, 176 insertions(+) create mode 100644 drivers/net/mdio/mdio-mux-meson-gxl.c diff --git a/drivers/net/mdio/Kconfig b/drivers/net/mdio/Kconfig index bfa16826a6e1..90309980686e 100644 --- a/drivers/net/mdio/Kconfig +++ b/drivers/net/mdio/Kconfig @@ -215,6 +215,17 @@ config MDIO_BUS_MUX_MESON_G12A the amlogic g12a SoC. The multiplexers connects either the external or the internal MDIO bus to the parent bus. =20 +config MDIO_BUS_MUX_MESON_GXL + tristate "Amlogic GXL based MDIO bus multiplexer" + depends on ARCH_MESON || COMPILE_TEST + depends on OF_MDIO && HAS_IOMEM && COMMON_CLK + select MDIO_BUS_MUX + default m if ARCH_MESON + help + This module provides a driver for the MDIO multiplexer/glue of + the amlogic GXL SoC. The multiplexer connects either the external + or the internal MDIO bus to the parent bus. + config MDIO_BUS_MUX_BCM6368 tristate "Broadcom BCM6368 MDIO bus multiplexers" depends on OF && OF_MDIO && (BMIPS_GENERIC || COMPILE_TEST) diff --git a/drivers/net/mdio/Makefile b/drivers/net/mdio/Makefile index 15f8dc4042ce..7d4cb4c11e4e 100644 --- a/drivers/net/mdio/Makefile +++ b/drivers/net/mdio/Makefile @@ -28,5 +28,6 @@ obj-$(CONFIG_MDIO_BUS_MUX_BCM6368) +=3D mdio-mux-bcm6368.o obj-$(CONFIG_MDIO_BUS_MUX_BCM_IPROC) +=3D mdio-mux-bcm-iproc.o obj-$(CONFIG_MDIO_BUS_MUX_GPIO) +=3D mdio-mux-gpio.o obj-$(CONFIG_MDIO_BUS_MUX_MESON_G12A) +=3D mdio-mux-meson-g12a.o +obj-$(CONFIG_MDIO_BUS_MUX_MESON_GXL) +=3D mdio-mux-meson-gxl.o obj-$(CONFIG_MDIO_BUS_MUX_MMIOREG) +=3D mdio-mux-mmioreg.o obj-$(CONFIG_MDIO_BUS_MUX_MULTIPLEXER) +=3D mdio-mux-multiplexer.o diff --git a/drivers/net/mdio/mdio-mux-meson-gxl.c b/drivers/net/mdio/mdio-= mux-meson-gxl.c new file mode 100644 index 000000000000..76188575ca1f --- /dev/null +++ b/drivers/net/mdio/mdio-mux-meson-gxl.c @@ -0,0 +1,164 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2022 Baylibre, SAS. + * Author: Jerome Brunet + */ + +#include +#include +#include +#include +#include +#include +#include + +#define ETH_REG2 0x0 +#define REG2_PHYID GENMASK(21, 0) +#define EPHY_GXL_ID 0x110181 +#define REG2_LEDACT GENMASK(23, 22) +#define REG2_LEDLINK GENMASK(25, 24) +#define REG2_DIV4SEL BIT(27) +#define REG2_ADCBYPASS BIT(30) +#define REG2_CLKINSEL BIT(31) +#define ETH_REG3 0x4 +#define REG3_ENH BIT(3) +#define REG3_CFGMODE GENMASK(6, 4) +#define REG3_AUTOMDIX BIT(7) +#define REG3_PHYADDR GENMASK(12, 8) +#define REG3_PWRUPRST BIT(21) +#define REG3_PWRDOWN BIT(22) +#define REG3_LEDPOL BIT(23) +#define REG3_PHYMDI BIT(26) +#define REG3_CLKINEN BIT(29) +#define REG3_PHYIP BIT(30) +#define REG3_PHYEN BIT(31) +#define ETH_REG4 0x8 +#define REG4_PWRUPRSTSIG BIT(0) + +#define MESON_GXL_MDIO_EXTERNAL_ID 0 +#define MESON_GXL_MDIO_INTERNAL_ID 1 + +struct gxl_mdio_mux { + void __iomem *regs; + void *mux_handle; +}; + +static void gxl_enable_internal_mdio(struct gxl_mdio_mux *priv) +{ + u32 val; + + /* Setup the internal phy */ + val =3D (REG3_ENH | + FIELD_PREP(REG3_CFGMODE, 0x7) | + REG3_AUTOMDIX | + FIELD_PREP(REG3_PHYADDR, 8) | + REG3_LEDPOL | + REG3_PHYMDI | + REG3_CLKINEN | + REG3_PHYIP); + + writel(REG4_PWRUPRSTSIG, priv->regs + ETH_REG4); + writel(val, priv->regs + ETH_REG3); + mdelay(10); + + /* NOTE: The HW kept the phy id configurable at runtime. + * The id below is arbitrary. It is the one used in the vendor code. + * The only constraint is that it must match the one in + * drivers/net/phy/meson-gxl.c to properly match the PHY. + */ + writel(FIELD_PREP(REG2_PHYID, EPHY_GXL_ID), + priv->regs + ETH_REG2); + + /* Enable the internal phy */ + val |=3D REG3_PHYEN; + writel(val, priv->regs + ETH_REG3); + writel(0, priv->regs + ETH_REG4); + + /* The phy needs a bit of time to power up */ + mdelay(10); +} + +static void gxl_enable_external_mdio(struct gxl_mdio_mux *priv) +{ + /* Reset the mdio bus mux to the external phy */ + writel(0, priv->regs + ETH_REG3); +} + +static int gxl_mdio_switch_fn(int current_child, int desired_child, + void *data) +{ + struct gxl_mdio_mux *priv =3D dev_get_drvdata(data); + + if (current_child =3D=3D desired_child) + return 0; + + switch (desired_child) { + case MESON_GXL_MDIO_EXTERNAL_ID: + gxl_enable_external_mdio(priv); + break; + case MESON_GXL_MDIO_INTERNAL_ID: + gxl_enable_internal_mdio(priv); + break; + default: + return -EINVAL; + } + + return 0; +} + +static const struct of_device_id gxl_mdio_mux_match[] =3D { + { .compatible =3D "amlogic,gxl-mdio-mux", }, + {}, +}; +MODULE_DEVICE_TABLE(of, gxl_mdio_mux_match); + +static int gxl_mdio_mux_probe(struct platform_device *pdev) +{ + struct device *dev =3D &pdev->dev; + struct gxl_mdio_mux *priv; + struct clk *rclk; + int ret; + + priv =3D devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + platform_set_drvdata(pdev, priv); + + priv->regs =3D devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->regs)) + return PTR_ERR(priv->regs); + + rclk =3D devm_clk_get_enabled(dev, "ref"); + if (IS_ERR(rclk)) + return dev_err_probe(dev, PTR_ERR(rclk), + "failed to get reference clock\n"); + + ret =3D mdio_mux_init(dev, dev->of_node, gxl_mdio_switch_fn, + &priv->mux_handle, dev, NULL); + if (ret) + dev_err_probe(dev, ret, "mdio multiplexer init failed\n"); + + return ret; +} + +static int gxl_mdio_mux_remove(struct platform_device *pdev) +{ + struct gxl_mdio_mux *priv =3D platform_get_drvdata(pdev); + + mdio_mux_uninit(priv->mux_handle); + + return 0; +} + +static struct platform_driver gxl_mdio_mux_driver =3D { + .probe =3D gxl_mdio_mux_probe, + .remove =3D gxl_mdio_mux_remove, + .driver =3D { + .name =3D "gxl-mdio-mux", + .of_match_table =3D gxl_mdio_mux_match, + }, +}; +module_platform_driver(gxl_mdio_mux_driver); + +MODULE_DESCRIPTION("Amlogic GXL MDIO multiplexer driver"); +MODULE_AUTHOR("Jerome Brunet "); +MODULE_LICENSE("GPL"); --=20 2.39.0