From patchwork Mon Nov 22 12:56:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aswath Govindraju X-Patchwork-Id: 12631875 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 233EEC43219 for ; Mon, 22 Nov 2021 12:59:21 +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=MJKuXSp1ftqKbRYJ6tVtKla/3xFrodEw8/wqPkfY+lU=; b=j2XW+1wXaneELK hsHdOXiJcOd6fE1frf5Drn4p/I9ldEYVJbxKBRFZXm+LkBpYTmYyTcOszAyJKUBqVqef+ye/u53px Un5x7S05nlhpzu26fB0JSDOCFevLCQm1JlqYv9HbLmPSm3yND/O9MGcY8/De4hhjcoujSSH1+2ijz pWzohduUBtv7b/KqnQOi8HDim2BMRBdrPVw+Ok5ZA21N9cMxCNZRcYt/tFYtbZ4bSPz92RKpvrjpj +HgjRbmpoOv6OwCcaHvng8JQSPg2ozAR37vjsccd5nB8HgLwbcTxepNzVeQ2qsMe6KTt3+gHD9Zu0 ISugM7UeAaRbcw9ZZSBw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mp8um-00GXVa-8V; Mon, 22 Nov 2021 12:59:20 +0000 Received: from fllv0015.ext.ti.com ([198.47.19.141]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mp8sU-00GWT5-6L for linux-phy@lists.infradead.org; Mon, 22 Nov 2021 12:56:59 +0000 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 1AMCuqUj088078; Mon, 22 Nov 2021 06:56:52 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1637585812; bh=201VFbQiGQ4XtlfCzVLgxMzLOwwlv2IozZLdJGUR3dY=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=yGiyvmXC0PSldBAXjpXtnmUOk45cjVLyYoC1hkBmf652NJv7lreIyfnkaYZ9dbA3m tdh49N0z4KReD75RUQ2sL3uJXucQjHCZEmhTBBEQO894/dxnC0B/T/Yr96cMXRwp5Z bLiwJQzchQXJgDW8Qovx1YynpP5q4cbb38HGSO9Y= Received: from DFLE104.ent.ti.com (dfle104.ent.ti.com [10.64.6.25]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 1AMCuqYa118761 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 22 Nov 2021 06:56:52 -0600 Received: from DFLE106.ent.ti.com (10.64.6.27) by DFLE104.ent.ti.com (10.64.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Mon, 22 Nov 2021 06:56:51 -0600 Received: from fllv0039.itg.ti.com (10.64.41.19) by DFLE106.ent.ti.com (10.64.6.27) 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; Mon, 22 Nov 2021 06:56:51 -0600 Received: from gsaswath-HP-ProBook-640-G5.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0039.itg.ti.com (8.15.2/8.15.2) with ESMTP id 1AMCuQi3109786; Mon, 22 Nov 2021 06:56:48 -0600 From: Aswath Govindraju To: CC: Nishanth Menon , Vignesh Raghavendra , Aswath Govindraju , Peter Rosin , Rob Herring , Wolfgang Grandegger , Marc Kleine-Budde , Kishon Vijay Abraham I , Vinod Koul , , , , Subject: [PATCH RFC v2 4/4] phy: phy-can-transceiver: Add support for setting mux Date: Mon, 22 Nov 2021 18:26:24 +0530 Message-ID: <20211122125624.6431-5-a-govindraju@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211122125624.6431-1-a-govindraju@ti.com> References: <20211122125624.6431-1-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-20211122_045658_352045_E7C43D0E X-CRM114-Status: GOOD ( 14.40 ) 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 | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/phy/phy-can-transceiver.c b/drivers/phy/phy-can-transceiver.c index 6f3fe37dee0e..15056b9d68ba 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 +22,23 @@ 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, + mux_control_enable_state(can_transceiver_phy->mux_ctrl)); + 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 +56,8 @@ 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 +108,19 @@ 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; + int ret; + + control = devm_mux_control_get(dev, NULL); + if (IS_ERR(control)) { + ret = PTR_ERR(control); + dev_err_probe(&pdev->dev, ret, "failed to get mux\n"); + 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)) {