From patchwork Thu Nov 11 16:43:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aswath Govindraju X-Patchwork-Id: 12615501 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 24724C433FE for ; Thu, 11 Nov 2021 16:43:39 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id E157961354 for ; Thu, 11 Nov 2021 16:43:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org E157961354 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=ti.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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=W6UO/sMbk3uvwzZeBGwWhDE7pw3jfZp89tXPPD9hsK0=; b=Z/delXui9lLClB OBOV6GW+K2JVIuYtnPcOsc8PEIVOmBoK6exDEbEmBtpnoxHSwP382uqggmr0tYVe/B7PWSOWnPhwk EqQF3miAQJBR4FFYMS+BiTtA9SyTXo4RhEMWDxAfWcBM2nXEN7RB0/PZvXnju1ViIthX4PiuxH8hw P9YYumH9Sc8XyCR3OOpv/r6XZmv9XAzsdWb7iBj6NIXjL/+o99InCsdnKIAlQ9WjdwGXUCetCsigD 1Du1MSMwRZlzqdLi5BQHJ2sdGetYLcNbXiBitOYjGB/epuD0HlQv0LN1S5diBhqmELB3p9oD+4y1x AXSGMY3CGmxJOaTcmSyg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mlDAo-008Qk2-Cu; Thu, 11 Nov 2021 16:43:38 +0000 Received: from fllv0016.ext.ti.com ([198.47.19.142]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mlDAl-008Qi8-4q for linux-phy@lists.infradead.org; Thu, 11 Nov 2021 16:43:36 +0000 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 1ABGhSnY117449; Thu, 11 Nov 2021 10:43:28 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1636649008; bh=k7bXhLNoj5kt2tCLCeFAz4grzLxLsAhcddQpqYT9CII=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=RAAsnX7E+DGOBjiY2SGnsWRNwQSKsHXPCe6A477iKaoCElAAnOgJlSJWqyQKgPCQu TBTH8blQMovYHz+DIjh9Ow//xw81DXR4PBNxsjuTEgxGURz5EKvrx8f2u7TgKS98WH BnsLKkeLRt/Rf0r4GpWnop3F6nEvSyx7WMgfj5wY= Received: from DFLE114.ent.ti.com (dfle114.ent.ti.com [10.64.6.35]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 1ABGhS8W067768 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 11 Nov 2021 10:43:28 -0600 Received: from DFLE112.ent.ti.com (10.64.6.33) by DFLE114.ent.ti.com (10.64.6.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Thu, 11 Nov 2021 10:43:28 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DFLE112.ent.ti.com (10.64.6.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Thu, 11 Nov 2021 10:43:28 -0600 Received: from gsaswath-HP-ProBook-640-G5.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 1ABGhEg4104171; Thu, 11 Nov 2021 10:43:24 -0600 From: Aswath Govindraju To: CC: Vignesh Raghavendra , Kishon Vijay Abraham I , Nishanth Menon , Aswath Govindraju , Wolfgang Grandegger , Marc Kleine-Budde , Vinod Koul , Rob Herring , , , , Subject: [PATCH RFC 2/2] phy: phy-can-transceiver: Add support for setting mux Date: Thu, 11 Nov 2021 22:13:12 +0530 Message-ID: <20211111164313.649-3-a-govindraju@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211111164313.649-1-a-govindraju@ti.com> References: <20211111164313.649-1-a-govindraju@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211111_084335_305791_D6AF4DAC X-CRM114-Status: GOOD ( 14.25 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org On some boards, for routing CAN signals from controller to transceiver, muxes might need to be set. Therefore, add support for setting the mux by reading the mux-controls property from the device tree node. Signed-off-by: Aswath Govindraju --- drivers/phy/phy-can-transceiver.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/phy/phy-can-transceiver.c b/drivers/phy/phy-can-transceiver.c index 6f3fe37dee0e..3d8da5226e27 100644 --- a/drivers/phy/phy-can-transceiver.c +++ b/drivers/phy/phy-can-transceiver.c @@ -10,6 +10,7 @@ #include #include #include +#include struct can_transceiver_data { u32 flags; @@ -21,13 +22,22 @@ struct can_transceiver_phy { struct phy *generic_phy; struct gpio_desc *standby_gpio; struct gpio_desc *enable_gpio; + struct mux_control *mux_ctrl; }; /* Power on function */ static int can_transceiver_phy_power_on(struct phy *phy) { + int ret; struct can_transceiver_phy *can_transceiver_phy = phy_get_drvdata(phy); + if (can_transceiver_phy->mux_ctrl) { + ret = mux_control_select(can_transceiver_phy->mux_ctrl, 1); + if (ret) { + dev_err(&phy->dev, "Failed to select CAN mux: %d\n", ret); + return ret; + } + } if (can_transceiver_phy->standby_gpio) gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 0); if (can_transceiver_phy->enable_gpio) @@ -45,6 +55,8 @@ static int can_transceiver_phy_power_off(struct phy *phy) gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 1); if (can_transceiver_phy->enable_gpio) gpiod_set_value_cansleep(can_transceiver_phy->enable_gpio, 0); + if (can_transceiver_phy->mux_ctrl) + mux_control_deselect(can_transceiver_phy->mux_ctrl); return 0; } @@ -95,6 +107,15 @@ static int can_transceiver_phy_probe(struct platform_device *pdev) match = of_match_node(can_transceiver_phy_ids, pdev->dev.of_node); drvdata = match->data; + if (of_property_read_bool(dev->of_node, "mux-controls")) { + struct mux_control *control; + + control = devm_mux_control_get(dev, NULL); + if (IS_ERR(control)) + return PTR_ERR(control); + can_transceiver_phy->mux_ctrl = control; + } + phy = devm_phy_create(dev, dev->of_node, &can_transceiver_phy_ops); if (IS_ERR(phy)) {