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Tue, 16 May 2023 15:44:11 +0000 From: Frank Li To: frank.li@nxp.com, vkoul@kernel.org Cc: devicetree@vger.kernel.org, fushi.peng@nxp.com, imx@lists.linux.dev, kernel@pengutronix.de, kishon@kernel.org, krzysztof.kozlowski+dt@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-phy@lists.infradead.org, robh+dt@kernel.org, s.hauer@pengutronix.de, shawnguo@kernel.org Subject: [PATCH v4 5/6] phy: cadence: salvo: Add cdns,usb2-disconnect-threshold-microvolt property Date: Tue, 16 May 2023 11:43:28 -0400 Message-Id: <20230516154329.3155031-6-Frank.Li@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230516154329.3155031-1-Frank.Li@nxp.com> References: <20230516154329.3155031-1-Frank.Li@nxp.com> X-ClientProxiedBy: BYAPR08CA0011.namprd08.prod.outlook.com (2603:10b6:a03:100::24) To AM6PR04MB4838.eurprd04.prod.outlook.com (2603:10a6:20b:4::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM6PR04MB4838:EE_|PAXPR04MB9008:EE_ X-MS-Office365-Filtering-Correlation-Id: 16c710f7-60e9-492e-686c-08db56246505 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Signed-off-by: Frank Li --- drivers/phy/cadence/phy-cadence-salvo.c | 29 +++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/phy/cadence/phy-cadence-salvo.c b/drivers/phy/cadence/phy-cadence-salvo.c index 41616f786321..881e122f93c2 100644 --- a/drivers/phy/cadence/phy-cadence-salvo.c +++ b/drivers/phy/cadence/phy-cadence-salvo.c @@ -6,6 +6,7 @@ * Copyright (c) 2019-2020 NXP */ +#include #include #include #include @@ -91,9 +92,19 @@ /* USB2 PHY register definition */ #define UTMI_REG15 0xaf +#define UTMI_AFE_RX_REG0 0x0d #define UTMI_AFE_RX_REG5 0x12 #define UTMI_AFE_BC_REG4 0x29 +/* Align UTMI_AFE_RX_REG0 bit[7:6] define */ +enum usb2_disconn_threshold { + USB2_DISCONN_THRESHOLD_575 = 0x0, + USB2_DISCONN_THRESHOLD_610 = 0x1, + USB2_DISCONN_THRESHOLD_645 = 0x3, +}; + +#define RX_USB2_DISCONN_MASK GENMASK(7, 6) + /* TB_ADDR_TX_RCVDETSC_CTRL */ #define RXDET_IN_P3_32KHZ BIT(0) /* @@ -125,6 +136,7 @@ struct cdns_salvo_phy { struct clk *clk; void __iomem *base; struct cdns_salvo_data *data; + enum usb2_disconn_threshold usb2_disconn; }; static const struct of_device_id cdns_salvo_phy_of_match[]; @@ -261,6 +273,12 @@ static int cdns_salvo_phy_init(struct phy *phy) cdns_salvo_write(salvo_phy, USB2_PHY_OFFSET, UTMI_AFE_RX_REG5, 0x5); + + value = cdns_salvo_read(salvo_phy, USB2_PHY_OFFSET, UTMI_AFE_RX_REG0); + value &= ~RX_USB2_DISCONN_MASK; + value = FIELD_PREP(RX_USB2_DISCONN_MASK, salvo_phy->usb2_disconn); + cdns_salvo_write(salvo_phy, USB2_PHY_OFFSET, UTMI_AFE_RX_REG0, value); + udelay(10); clk_disable_unprepare(salvo_phy->clk); @@ -315,6 +333,7 @@ static int cdns_salvo_phy_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct cdns_salvo_phy *salvo_phy; struct cdns_salvo_data *data; + u32 val; data = (struct cdns_salvo_data *)of_device_get_match_data(dev); salvo_phy = devm_kzalloc(dev, sizeof(*salvo_phy), GFP_KERNEL); @@ -326,6 +345,16 @@ static int cdns_salvo_phy_probe(struct platform_device *pdev) if (IS_ERR(salvo_phy->clk)) return PTR_ERR(salvo_phy->clk); + if (of_property_read_u32(dev->of_node, "cdns,usb2-disconnect-threshold-microvolt", &val)) + val = 575; + + if (val < 610) + salvo_phy->usb2_disconn = USB2_DISCONN_THRESHOLD_575; + else if (val < 645) + salvo_phy->usb2_disconn = USB2_DISCONN_THRESHOLD_610; + else + salvo_phy->usb2_disconn = USB2_DISCONN_THRESHOLD_645; + salvo_phy->base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(salvo_phy->base)) return PTR_ERR(salvo_phy->base);