From patchwork Mon Jul 26 14:11:12 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Kleine-Budde X-Patchwork-Id: 486220 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ED616C4320E for ; Mon, 26 Jul 2021 14:13:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D3D046008E for ; Mon, 26 Jul 2021 14:13:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234841AbhGZNcb (ORCPT ); Mon, 26 Jul 2021 09:32:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53354 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234685AbhGZNbz (ORCPT ); Mon, 26 Jul 2021 09:31:55 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A6744C061389 for ; Mon, 26 Jul 2021 07:12:14 -0700 (PDT) Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=bjornoya.blackshift.org) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1m81L3-0001Jt-42 for netdev@vger.kernel.org; Mon, 26 Jul 2021 16:12:13 +0200 Received: from dspam.blackshift.org (localhost [127.0.0.1]) by bjornoya.blackshift.org (Postfix) with SMTP id BCE7C6581FB for ; Mon, 26 Jul 2021 14:12:03 +0000 (UTC) Received: from hardanger.blackshift.org (unknown [172.20.34.65]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-384) server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by bjornoya.blackshift.org (Postfix) with ESMTPS id 54917658188; Mon, 26 Jul 2021 14:11:50 +0000 (UTC) Received: from blackshift.org (localhost [::1]) by hardanger.blackshift.org (OpenSMTPD) with ESMTP id f3983bd5; Mon, 26 Jul 2021 14:11:46 +0000 (UTC) From: Marc Kleine-Budde To: netdev@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, linux-can@vger.kernel.org, kernel@pengutronix.de, Faiz Abbas , Aswath Govindraju , Marc Kleine-Budde Subject: [PATCH net-next 14/46] can: m_can: Add support for transceiver as phy Date: Mon, 26 Jul 2021 16:11:12 +0200 Message-Id: <20210726141144.862529-15-mkl@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210726141144.862529-1-mkl@pengutronix.de> References: <20210726141144.862529-1-mkl@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:201:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: mkl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: netdev@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Faiz Abbas Add support for implementing transceiver node as phy. The max_bitrate is obtained by getting a phy attribute. Link: https://lore.kernel.org/r/20210724174001.553047-1-mkl@pengutronix.de Signed-off-by: Faiz Abbas Signed-off-by: Aswath Govindraju Signed-off-by: Marc Kleine-Budde --- drivers/net/can/m_can/m_can.c | 11 ++++++++++- drivers/net/can/m_can/m_can.h | 2 ++ drivers/net/can/m_can/m_can_platform.c | 13 +++++++++++++ 3 files changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c index 317cdc98c539..c430432c28ec 100644 --- a/drivers/net/can/m_can/m_can.c +++ b/drivers/net/can/m_can/m_can.c @@ -21,6 +21,7 @@ #include #include #include +#include #include "m_can.h" @@ -1521,6 +1522,8 @@ static int m_can_close(struct net_device *dev) close_candev(dev); can_led_event(dev, CAN_LED_EVENT_STOP); + phy_power_off(cdev->transceiver); + return 0; } @@ -1706,10 +1709,14 @@ static int m_can_open(struct net_device *dev) struct m_can_classdev *cdev = netdev_priv(dev); int err; - err = m_can_clk_start(cdev); + err = phy_power_on(cdev->transceiver); if (err) return err; + err = m_can_clk_start(cdev); + if (err) + goto out_phy_power_off; + /* open the can device */ err = open_candev(dev); if (err) { @@ -1766,6 +1773,8 @@ static int m_can_open(struct net_device *dev) close_candev(dev); exit_disable_clks: m_can_clk_stop(cdev); +out_phy_power_off: + phy_power_off(cdev->transceiver); return err; } diff --git a/drivers/net/can/m_can/m_can.h b/drivers/net/can/m_can/m_can.h index ace071c3e58c..38cad068abad 100644 --- a/drivers/net/can/m_can/m_can.h +++ b/drivers/net/can/m_can/m_can.h @@ -28,6 +28,7 @@ #include #include #include +#include /* m_can lec values */ enum m_can_lec_type { @@ -82,6 +83,7 @@ struct m_can_classdev { struct workqueue_struct *tx_wq; struct work_struct tx_work; struct sk_buff *tx_skb; + struct phy *transceiver; struct can_bittiming_const *bit_timing; struct can_bittiming_const *data_timing; diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c index 599de0e08cd7..8b5819cd4b80 100644 --- a/drivers/net/can/m_can/m_can_platform.c +++ b/drivers/net/can/m_can/m_can_platform.c @@ -6,6 +6,7 @@ // Copyright (C) 2018-19 Texas Instruments Incorporated - http://www.ti.com/ #include +#include #include "m_can.h" @@ -67,6 +68,7 @@ static int m_can_plat_probe(struct platform_device *pdev) struct resource *res; void __iomem *addr; void __iomem *mram_addr; + struct phy *transceiver; int irq, ret = 0; mcan_class = m_can_class_allocate_dev(&pdev->dev, @@ -101,6 +103,16 @@ static int m_can_plat_probe(struct platform_device *pdev) goto probe_fail; } + transceiver = devm_phy_optional_get(&pdev->dev, NULL); + if (IS_ERR(transceiver)) { + ret = PTR_ERR(transceiver); + dev_err_probe(&pdev->dev, ret, "failed to get phy\n"); + goto probe_fail; + } + + if (transceiver) + mcan_class->can.bitrate_max = transceiver->attrs.max_link_rate; + priv->base = addr; priv->mram_base = mram_addr; @@ -108,6 +120,7 @@ static int m_can_plat_probe(struct platform_device *pdev) mcan_class->pm_clock_support = 1; mcan_class->can.clock.freq = clk_get_rate(mcan_class->cclk); mcan_class->dev = &pdev->dev; + mcan_class->transceiver = transceiver; mcan_class->ops = &m_can_plat_ops;