From patchwork Mon Jan 16 09:16:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jerome Brunet X-Patchwork-Id: 13102800 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DC657C54EBE for ; Mon, 16 Jan 2023 09:17:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=zku5Seiv4Uy0G0HSNGAcKwMzu1tXtBF8Fvipbvzjn7E=; b=I5afhbwRBldB0d csGKAhganqsAuk1qecr+qKm4diep59UN6J5C5ebjUKs2EaLbDjcUeipWx8Ma3RJu9YQzvNEEZcqxs xAvIGu/CnvS3gshG6i91TQNII3qOBiNKja19uPC4y4h+JssubWaiUDEFFhLfs1c819vPYnq61+xY0 rcHFTGp3evo1arz2tCjjbHBVx8YMlnqNb4g/K0EldxuxnevmdC+WlOLInTP+kl6ywo0z3tPcuz/Da AOmjFGN9pvysUNfVG2TpTDN0MqkU5eL8im9Y4Rg2AK2kizWNSM7vHjvtF7cpR3goOcM3E1sqSGGmp xgIBL2RxgJ4W0HY7E1Eg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pHLbu-009J6E-ER; Mon, 16 Jan 2023 09:16:58 +0000 Received: from mail-wm1-x336.google.com ([2a00:1450:4864:20::336]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pHLbs-009J4d-66 for linux-amlogic@lists.infradead.org; Mon, 16 Jan 2023 09:16:57 +0000 Received: by mail-wm1-x336.google.com with SMTP id c4-20020a1c3504000000b003d9e2f72093so18287547wma.1 for ; Mon, 16 Jan 2023 01:16:56 -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=uZcDGdNDu8uBNNlcnVM3dW50Ek5FZ0cyrrNZsgY+fPo=; b=tiBdYNutIDqslGItdc45uVHMVAntLS/gLDRiamJFHULUDBgNQE9nPaVohFLqvigUy9 7McONPL/1jEcUYDgNfe9l9Cm9vnaZeO+zYFtyIPp4uBBDy9kH+l9z6AYr8xgTFvfML4/ Na2znx1Msywlu3lN1SSt4fF4xsXvB7MIy3Yp7h+kne7UybXBJOT8SZOLOLdnyV2g7mxg 4epo6Qyvqg3a74U2PQYRj5cS+Ci4G5Eh8tkFxoS9epWjk4YrAGOgSyZPIyZ5MoJBy3XF 491akUDHbx0qMEl1cfXTLp6HLPLWEXQNFzDp+RTU39f0Em6p5aOWIUqs0DsofEiH26cA zqzA== 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=uZcDGdNDu8uBNNlcnVM3dW50Ek5FZ0cyrrNZsgY+fPo=; b=ghIx1+Z4Sz0Hb/ucZhdCjVyVjVygiRpR60aop8CD2GlSZ+QxkRvwnhGOhh9LJHn9GB +TxLDirMde4UWpRmQXkLWd7x1DlhsbjJ1yABJQ9WrXoGJQpqXuVUUDZurEM0hUWpksHN szH71Fb3AIz6wJDyRaibDDFbjdCGd1Alamq0HEv7h79BvxEKON9Qdt/UJUeLgEl5wWeE 4opMRrWbULuRdl6OVhPOTZz92aWd3xPlYPiFK8QhCQMZf8TDvGIAeq8uQEviwEbHuQ08 T34jGD4eCcdNBZpEWINmd5Iqx1NXxLP/kK4OVv8f8bH+preyxnVHGoKN4Cj9p1wo1hKt FWUg== X-Gm-Message-State: AFqh2kpKrA6TkeAAkG4tCKvwBREPD3JmLUtRySg0ozQVshw37CRgaWTU 6gkJjqYixNTPcEeJgVLTp+ekZw== X-Google-Smtp-Source: AMrXdXuCRbQg8NS8SJ1exUq8lAx/EQMg8yYbu3RqREsEePTCo6eu0cvE+Pv0cEA/0u11FEGbaltV6Q== X-Received: by 2002:a05:600c:358f:b0:3d1:cdf7:debf with SMTP id p15-20020a05600c358f00b003d1cdf7debfmr68091704wmq.26.1673860615046; Mon, 16 Jan 2023 01:16:55 -0800 (PST) Received: from localhost.localdomain (82-65-169-74.subs.proxad.net. [82.65.169.74]) by smtp.googlemail.com with ESMTPSA id h19-20020a05600c351300b003d9a86a13bfsm35923491wmq.28.2023.01.16.01.16.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Jan 2023 01:16:54 -0800 (PST) From: Jerome Brunet To: netdev@vger.kernel.org, "David S. Miller" Cc: Jerome Brunet , linux-amlogic@lists.infradead.org, Kevin Hilman , Neil Armstrong , Da Xue , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 1/2] dt-bindings: net: add amlogic gxl mdio multiplexer Date: Mon, 16 Jan 2023 10:16:35 +0100 Message-Id: <20230116091637.272923-2-jbrunet@baylibre.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116091637.272923-1-jbrunet@baylibre.com> References: <20230116091637.272923-1-jbrunet@baylibre.com> MIME-Version: 1.0 X-Patchwork-Bot: notify X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230116_011656_255787_8D766F2A X-CRM114-Status: GOOD ( 12.81 ) X-BeenThere: linux-amlogic@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-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org Add documentation for the MDIO bus multiplexer found on the Amlogic GXL SoC family Signed-off-by: Jerome Brunet Reviewed-by: Krzysztof Kozlowski --- .../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.yaml b/Documentation/devicetree/bindings/net/amlogic,gxl-mdio-mux.yaml new file mode 100644 index 000000000000..d21bce695fa9 --- /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 between + 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 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "amlogic,gxl-mdio-mux"; + clocks = <&refclk>; + clock-names = "ref"; + reg = <0x558 0xc>; + mdio-parent-bus = <&mdio0>; + + external_mdio: mdio@0 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0x0>; + }; + + internal_mdio: mdio@1 { + #address-cells = <1>; + #size-cells = <0>; + reg = <0x1>; + }; + }; From patchwork Mon Jan 16 09:16:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jerome Brunet X-Patchwork-Id: 13102801 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B69C1C54EBE for ; Mon, 16 Jan 2023 09:17:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=olx5ZoYjTxIUPd6nDPRB+OUop40ZRTsQlPRzHQflNOo=; b=z7Oa+duRNbw12V Z0ldHOXdPZX2u8TBjsxljSYcr17cOCEih+DadhIgU0xtmK2EMmDy7OBTYRlLR3WFx1uJiVerOOXKX NmGuSOEF3CgOtpVQdKHh5gn9RuHo0Bl8mqNoYQ4GJwMdeFm/MpNir6WsSJv+dNDR+3FXaolia7dHp 8dhDbeEfMv1kpYW46kH+1o6nmUTWPg+etLrir0wGvUx+p2SLRtqkY74YW3P9p/pTePSVejbsfSGah VBwkNAAfRdyfqpwMQN86NFMJfuuGmXcujHtcIaUDJGEuiWWBHzlyB0Zp0J6RffGg2gJ2Neqy88gJj oUm07s7j7U9qVDvpnytw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pHLby-009J7s-1E; Mon, 16 Jan 2023 09:17:02 +0000 Received: from mail-wm1-x336.google.com ([2a00:1450:4864:20::336]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pHLbu-009J4d-3v for linux-amlogic@lists.infradead.org; Mon, 16 Jan 2023 09:16:59 +0000 Received: by mail-wm1-x336.google.com with SMTP id c4-20020a1c3504000000b003d9e2f72093so18287645wma.1 for ; Mon, 16 Jan 2023 01:16:58 -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=dgMVlL2MF8oJlM5fHKB3o7u/n5s4tpW/nx3DYglTQ3w=; b=Lr4KnPV/ZIdVdUiIdzHEdrmaBFGlMJloHnaJrFmO/qO3VrpXI4HlI7LXFihXAyOiFt j0S0HNEvZc8XljiIxnte4D/7wNW6aT0pCuK3IuBSPOpcJYflJpJXHuZfJ9llVWviSmZ8 Km5EQeN8BjjFJRcy4AaP3VryWUiUEx2j5pIkudJ/NK3QlS0QOivUoTfUh5XhWNtylr7p U68c68omVyvLRE97q4nsbw8KZWlUuwX0fZp7+sPDPk8lb800d3tH/nKWmT5F7UNbD7tg jGIY2PwRYdE28wRkg6y4eTdbGmlhqWk+GuiebLPxiLWx32Nt6Nb0n4D/TBmBZy49nyPR pyvA== 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=dgMVlL2MF8oJlM5fHKB3o7u/n5s4tpW/nx3DYglTQ3w=; b=q0W4dKStF2DhNDW3KJ698aSnfKfxMHaD0XubaleKdjwrR/zegbEu3SaeUPpCDQbWqQ fofHSokA7sPgtQzt7DRtUG+84scSf+USgp0+rntFpZ0aAuvobjPeB0w5x9UV6zogst65 sdnxvc4AWnt+f7JwbviRDI7oY07iUSC8KqLSJzf2LkTLUeBLTuNxLn41zMMgO6D/TAEF Eoh1f2dgDstWhk8q8UL1m9GayHPDhLuNJITnO1UetYXITt1H9kMdc0ZddlJ/A9j5VSpb rKGzZSJnyoPWPSOV5w3eXDGgsW6nV7E5EeDaVpRfp3hvV2XTScuVSAufbPvHngDzzWaF 59VQ== X-Gm-Message-State: AFqh2krIIbeCDzIpJJHsmeljc6gOWu1R4NuKhrDOuDeNlUSpJH07D1qi zIhuYqUKcYqX74E8MOVttS3cIQ== X-Google-Smtp-Source: AMrXdXvOiiNUcVFngBw4gAvrjG+E6mQhC5DXwRwZ8wY63DLaMVfmjULbmGpFfCrm6Ii7+EGmgSNykQ== X-Received: by 2002:a05:600c:1e8c:b0:3d6:2952:679b with SMTP id be12-20020a05600c1e8c00b003d62952679bmr65977500wmb.34.1673860617638; Mon, 16 Jan 2023 01:16:57 -0800 (PST) Received: from localhost.localdomain (82-65-169-74.subs.proxad.net. [82.65.169.74]) by smtp.googlemail.com with ESMTPSA id h19-20020a05600c351300b003d9a86a13bfsm35923491wmq.28.2023.01.16.01.16.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Jan 2023 01:16:57 -0800 (PST) From: Jerome Brunet To: netdev@vger.kernel.org, "David S. Miller" Cc: Jerome Brunet , linux-amlogic@lists.infradead.org, Kevin Hilman , Neil Armstrong , Da Xue , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next 2/2] net: mdio: add amlogic gxl mdio mux support Date: Mon, 16 Jan 2023 10:16:36 +0100 Message-Id: <20230116091637.272923-3-jbrunet@baylibre.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230116091637.272923-1-jbrunet@baylibre.com> References: <20230116091637.272923-1-jbrunet@baylibre.com> MIME-Version: 1.0 X-Patchwork-Bot: notify X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230116_011658_240538_12170233 X-CRM114-Status: GOOD ( 21.77 ) X-BeenThere: linux-amlogic@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-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org Add support for the mdio mux and internal phy glue of the GXL SoC family Signed-off-by: Jerome Brunet --- drivers/net/mdio/Kconfig | 11 ++ drivers/net/mdio/Makefile | 1 + drivers/net/mdio/mdio-mux-meson-gxl.c | 160 ++++++++++++++++++++++++++ 3 files changed, 172 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..80f3e10b1be1 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. +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 multiplexers 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) += mdio-mux-bcm6368.o obj-$(CONFIG_MDIO_BUS_MUX_BCM_IPROC) += mdio-mux-bcm-iproc.o obj-$(CONFIG_MDIO_BUS_MUX_GPIO) += mdio-mux-gpio.o obj-$(CONFIG_MDIO_BUS_MUX_MESON_G12A) += mdio-mux-meson-g12a.o +obj-$(CONFIG_MDIO_BUS_MUX_MESON_GXL) += mdio-mux-meson-gxl.o obj-$(CONFIG_MDIO_BUS_MUX_MMIOREG) += mdio-mux-mmioreg.o obj-$(CONFIG_MDIO_BUS_MUX_MULTIPLEXER) += 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..205095d845ea --- /dev/null +++ b/drivers/net/mdio/mdio-mux-meson-gxl.c @@ -0,0 +1,160 @@ +// 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 int gxl_enable_internal_mdio(struct gxl_mdio_mux *priv) +{ + u32 val; + + /* Setup the internal phy */ + val = (REG3_ENH | + FIELD_PREP(REG3_CFGMODE, 0x7) | + REG3_AUTOMDIX | + FIELD_PREP(REG3_PHYADDR, 8) | + REG3_LEDPOL | + REG3_PHYMDI | + REG3_CLKINEN | + REG3_PHYIP); + + writel_relaxed(REG4_PWRUPRSTSIG, priv->regs + ETH_REG4); + writel_relaxed(val, priv->regs + ETH_REG3); + mdelay(10); + + /* Set the internal phy id */ + writel_relaxed(FIELD_PREP(REG2_PHYID, 0x110181), + priv->regs + ETH_REG2); + + /* Enable the internal phy */ + val |= REG3_PHYEN; + writel_relaxed(val, priv->regs + ETH_REG3); + writel_relaxed(0, priv->regs + ETH_REG4); + + /* The phy needs a bit of time to come up */ + mdelay(10); + + return 0; +} + +static int gxl_enable_external_mdio(struct gxl_mdio_mux *priv) +{ + /* Reset the mdio bus mux to the external phy */ + writel_relaxed(0, priv->regs + ETH_REG3); + + return 0; +} + +static int gxl_mdio_switch_fn(int current_child, int desired_child, + void *data) +{ + struct gxl_mdio_mux *priv = dev_get_drvdata(data); + + if (current_child == desired_child) + return 0; + + switch (desired_child) { + case MESON_GXL_MDIO_EXTERNAL_ID: + return gxl_enable_external_mdio(priv); + case MESON_GXL_MDIO_INTERNAL_ID: + return gxl_enable_internal_mdio(priv); + default: + return -EINVAL; + } +} + +static const struct of_device_id gxl_mdio_mux_match[] = { + { .compatible = "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 = &pdev->dev; + struct clk *rclk; + struct gxl_mdio_mux *priv; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + platform_set_drvdata(pdev, priv); + + priv->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->regs)) + return PTR_ERR(priv->regs); + + rclk = 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 = 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 = platform_get_drvdata(pdev); + + mdio_mux_uninit(priv->mux_handle); + + return 0; +} + +static struct platform_driver gxl_mdio_mux_driver = { + .probe = gxl_mdio_mux_probe, + .remove = gxl_mdio_mux_remove, + .driver = { + .name = "gxl-mdio-mux", + .of_match_table = 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 v2");