From patchwork Thu Oct 12 12:16:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13419194 X-Patchwork-Delegate: kuba@kernel.org Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1923B22EE6 for ; Thu, 12 Oct 2023 12:16:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 882FDB7; Thu, 12 Oct 2023 05:16:34 -0700 (PDT) X-IronPort-AV: E=Sophos;i="6.03,218,1694703600"; d="scan'208";a="182840405" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 12 Oct 2023 21:16:33 +0900 Received: from localhost.localdomain (unknown [10.166.15.32]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id E6EF042C9E68; Thu, 12 Oct 2023 21:16:33 +0900 (JST) From: Yoshihiro Shimoda To: s.shtylyov@omp.ru, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH net-next] rswitch: Add PM ops Date: Thu, 12 Oct 2023 21:16:18 +0900 Message-Id: <20231012121618.267315-1-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Spam-Status: No, score=1.1 required=5.0 tests=AC_FROM_MANY_DOTS,BAYES_00, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Level: * X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org Add PM ops for Suspend to Idle. When the system suspended, the Ethernet Serdes's clock will be stopped. So, this driver needs to re-initialize the Ethernet Serdes by phy_init() in renesas_eth_sw_resume(). Otherwise, timeout happened in phy_power_on(). Signed-off-by: Yoshihiro Shimoda --- This patch is based on the latest net-next.git / next branch. After applied this patch with the following patches, the system can enter/exit Suspend to Idle without any error: https://lore.kernel.org/netdev/20230201131454.1928136-1-yoshihiro.shimoda.uh@renesas.com/ https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=510b18cf23b9bd8a982ef7f1fb19f3968a2bf787 https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=053f13f67be6d02781730c9ac71abde6e9140610 drivers/net/ethernet/renesas/rswitch.c | 43 ++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c index 0023ff254915..301053db61ac 100644 --- a/drivers/net/ethernet/renesas/rswitch.c +++ b/drivers/net/ethernet/renesas/rswitch.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include #include @@ -1315,6 +1316,7 @@ static int rswitch_phy_device_init(struct rswitch_device *rdev) if (!phydev) goto out; __set_bit(rdev->etha->phy_interface, phydev->host_interfaces); + phydev->mac_managed_pm = true; phydev = of_phy_connect(rdev->ndev, phy, rswitch_adjust_link, 0, rdev->etha->phy_interface); @@ -1991,11 +1993,52 @@ static void renesas_eth_sw_remove(struct platform_device *pdev) platform_set_drvdata(pdev, NULL); } +static int __maybe_unused renesas_eth_sw_suspend(struct device *dev) +{ + struct rswitch_private *priv = dev_get_drvdata(dev); + struct net_device *ndev; + int i; + + rswitch_for_each_enabled_port(priv, i) { + ndev = priv->rdev[i]->ndev; + if (netif_running(ndev)) { + netif_device_detach(ndev); + rswitch_stop(ndev); + } + if (priv->rdev[i]->serdes->init_count) + phy_exit(priv->rdev[i]->serdes); + } + + return 0; +} + +static int __maybe_unused renesas_eth_sw_resume(struct device *dev) +{ + struct rswitch_private *priv = dev_get_drvdata(dev); + struct net_device *ndev; + int i; + + rswitch_for_each_enabled_port(priv, i) { + phy_init(priv->rdev[i]->serdes); + ndev = priv->rdev[i]->ndev; + if (netif_running(ndev)) { + rswitch_open(ndev); + netif_device_attach(ndev); + } + } + + return 0; +} + +static SIMPLE_DEV_PM_OPS(renesas_eth_sw_pm_ops, renesas_eth_sw_suspend, + renesas_eth_sw_resume); + static struct platform_driver renesas_eth_sw_driver_platform = { .probe = renesas_eth_sw_probe, .remove_new = renesas_eth_sw_remove, .driver = { .name = "renesas_eth_sw", + .pm = &renesas_eth_sw_pm_ops, .of_match_table = renesas_eth_sw_of_table, } };