From patchwork Thu Sep 28 15:15:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Roullier X-Patchwork-Id: 13403243 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 1DC3D4E286; Thu, 28 Sep 2023 15:17:06 +0000 (UTC) Received: from mx07-00178001.pphosted.com (mx07-00178001.pphosted.com [185.132.182.106]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54FB410D2; Thu, 28 Sep 2023 08:17:03 -0700 (PDT) Received: from pps.filterd (m0369458.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.22/8.17.1.22) with ESMTP id 38SE2Fpn007605; Thu, 28 Sep 2023 17:16:33 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s= selector1; bh=qxcsFIRjXFLHKGA5nZCs9qGhJHkQP52WVsL1NenTq+Y=; b=Cg AsPUe17WSk86oFR5FL/ApJ9QQiyV8Gbtg95g1qdpYj6MixvWs39m8DRoE3y0Gpio Lfbxh72la1t3UaOunn/ZXtu2FZr/ekn06pU2sk2wY+zrO8yoMOqEh/nj6KVbMVLH KBEqJp8JksgCPjOsJ/H+NOKfi142zMQMlzOOFki5fdrRK4AMP2XFVGDXlm3tMM+K A33hQm0QnnARov6lttoYWUlltdBeOpZooymyOJpiQz2RNZA0/DbvOGlS1n9D/4xJ /OZUg8h/sPnDCfIFMBgDtcSeuZmc1h3DJr8BhB/pUh7kQKKTcQ2x6FfX8XggISCJ WssUplSZ3fKOsYjJZSkA== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3ta9k0my0c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 28 Sep 2023 17:16:33 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 0D7F2100057; Thu, 28 Sep 2023 17:16:33 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node2.st.com [10.75.129.70]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 0295E24553C; Thu, 28 Sep 2023 17:16:33 +0200 (CEST) Received: from localhost (10.201.21.249) by SHFDAG1NODE2.st.com (10.75.129.70) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Thu, 28 Sep 2023 17:16:32 +0200 From: Christophe Roullier To: "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maxime Coquelin , Alexandre Torgue , Richard Cochran , Jose Abreu , Liam Girdwood , Mark Brown , Christophe Roullier CC: , , , , Subject: [PATCH v3 08/12] net: ethernet: stmmac: stm32: support the phy-supply regulator binding Date: Thu, 28 Sep 2023 17:15:08 +0200 Message-ID: <20230928151512.322016-9-christophe.roullier@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230928151512.322016-1-christophe.roullier@foss.st.com> References: <20230928151512.322016-1-christophe.roullier@foss.st.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Originating-IP: [10.201.21.249] X-ClientProxiedBy: SHFCAS1NODE2.st.com (10.75.129.73) To SHFDAG1NODE2.st.com (10.75.129.70) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-09-28_14,2023-09-28_02,2023-05-22_02 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: kuba@kernel.org From: Christophe Roullier Configure the phy regulator if defined by the "phy-supply" DT phandle. Signed-off-by: Christophe Roullier --- .../net/ethernet/stmicro/stmmac/dwmac-stm32.c | 51 ++++++++++++++++++- 1 file changed, 50 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c index 72dda71850d75..31e3abd2caeaa 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -84,6 +85,7 @@ struct stm32_dwmac { u32 mode_reg; /* MAC glue-logic mode register */ u32 mode_mask; struct regmap *regmap; + struct regulator *regulator; u32 speed; const struct stm32_ops *ops; struct device *dev; @@ -309,6 +311,16 @@ static int stm32_dwmac_parse_data(struct stm32_dwmac *dwmac, if (err) pr_debug("Warning sysconfig register mask not set\n"); + dwmac->regulator = devm_regulator_get_optional(dev, "phy"); + if (IS_ERR(dwmac->regulator)) { + if (PTR_ERR(dwmac->regulator) == -EPROBE_DEFER) { + dev_dbg(dev, "phy regulator is not available yet, deferred probing\n"); + return -EPROBE_DEFER; + } + dev_dbg(dev, "no regulator found\n"); + dwmac->regulator = NULL; + } + return 0; } @@ -367,6 +379,27 @@ static int stm32_dwmac_wake_init(struct device *dev, return 0; } +static int phy_power_on(struct stm32_dwmac *bsp_priv, bool enable) +{ + int ret; + struct device *dev = bsp_priv->dev; + + if (!bsp_priv->regulator) + return 0; + + if (enable) { + ret = regulator_enable(bsp_priv->regulator); + if (ret) + dev_err(dev, "fail to enable phy-supply\n"); + } else { + ret = regulator_disable(bsp_priv->regulator); + if (ret) + dev_err(dev, "fail to disable phy-supply\n"); + } + + return 0; +} + static int stm32_dwmac_probe(struct platform_device *pdev) { struct plat_stmmacenet_data *plat_dat; @@ -414,12 +447,18 @@ static int stm32_dwmac_probe(struct platform_device *pdev) if (ret) goto err_wake_init_disable; - ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res); + ret = phy_power_on(plat_dat->bsp_priv, true); if (ret) goto err_clk_disable; + ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res); + if (ret) + goto err_gmac_powerdown; + return 0; +err_gmac_powerdown: + phy_power_on(plat_dat->bsp_priv, false); err_clk_disable: stm32_dwmac_clk_disable(dwmac); err_wake_init_disable: @@ -440,6 +479,8 @@ static void stm32_dwmac_remove(struct platform_device *pdev) dev_pm_clear_wake_irq(&pdev->dev); device_init_wakeup(&pdev->dev, false); + + phy_power_on(priv->plat->bsp_priv, false); } static int stm32mp1_suspend(struct stm32_dwmac *dwmac) @@ -455,12 +496,20 @@ static int stm32mp1_suspend(struct stm32_dwmac *dwmac) if (dwmac->enable_eth_ck) clk_disable_unprepare(dwmac->clk_eth_ck); + /* Keep the PHY up if we use Wake-on-Lan. */ + if (!device_may_wakeup(dwmac->dev)) + phy_power_on(dwmac, false); + return ret; } static void stm32mp1_resume(struct stm32_dwmac *dwmac) { clk_disable_unprepare(dwmac->clk_ethstp); + + /* The PHY was up for Wake-on-Lan. */ + if (!device_may_wakeup(dwmac->dev)) + phy_power_on(dwmac, true); } static int stm32mcu_suspend(struct stm32_dwmac *dwmac)