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Thu, 15 Apr 2021 09:28:35 +0000 From: "Radu Pirea (NXP OSS)" To: andrew@lunn.ch, hkallweit1@gmail.com, linux@armlinux.org.uk, davem@davemloft.net, kuba@kernel.org Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, "Radu Pirea (NXP OSS)" Subject: [PATCH v2 1/2] net: phy: add genphy_c45_pma_suspend/resume Date: Thu, 15 Apr 2021 12:25:37 +0300 Message-Id: <20210415092538.78398-2-radu-nicolae.pirea@oss.nxp.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210415092538.78398-1-radu-nicolae.pirea@oss.nxp.com> References: <20210415092538.78398-1-radu-nicolae.pirea@oss.nxp.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [89.45.21.213] X-ClientProxiedBy: AM0PR02CA0177.eurprd02.prod.outlook.com (2603:10a6:20b:28e::14) To VI1PR04MB5101.eurprd04.prod.outlook.com (2603:10a6:803:5f::31) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (89.45.21.213) by AM0PR02CA0177.eurprd02.prod.outlook.com (2603:10a6:20b:28e::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4042.16 via Frontend Transport; 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Signed-off-by: Radu Pirea (NXP OSS) --- drivers/net/phy/phy-c45.c | 43 +++++++++++++++++++++++++++++++++++++++ include/linux/phy.h | 2 ++ 2 files changed, 45 insertions(+) diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c index 91e3acb9e397..f4816b7d31b3 100644 --- a/drivers/net/phy/phy-c45.c +++ b/drivers/net/phy/phy-c45.c @@ -8,6 +8,49 @@ #include #include +/** + * genphy_c45_pma_can_sleep - checks if the PMA have sleep support + * @phydev: target phy_device struct + */ +static bool genphy_c45_pma_can_sleep(struct phy_device *phydev) +{ + int stat1; + + stat1 = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_STAT1); + if (stat1 < 0) + return false; + + return !!(stat1 & MDIO_STAT1_LPOWERABLE); +} + +/** + * genphy_c45_pma_resume - wakes up the PMA module + * @phydev: target phy_device struct + */ +int genphy_c45_pma_resume(struct phy_device *phydev) +{ + if (!genphy_c45_pma_can_sleep(phydev)) + return -EOPNOTSUPP; + + return phy_clear_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, + MDIO_CTRL1_LPOWER); +} +EXPORT_SYMBOL_GPL(genphy_c45_pma_resume); + +/** + * genphy_c45_pma_suspend - suspends the PMA module + * @phydev: target phy_device struct + */ +int genphy_c45_pma_suspend(struct phy_device *phydev) +{ + if (!genphy_c45_pma_can_sleep(phydev)) + return -EOPNOTSUPP; + + return phy_set_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, + MDIO_CTRL1_LPOWER); +} +EXPORT_SYMBOL_GPL(genphy_c45_pma_suspend); + /** * genphy_c45_pma_setup_forced - configures a forced speed * @phydev: target phy_device struct diff --git a/include/linux/phy.h b/include/linux/phy.h index 98fb441dd72e..e3d4d583463b 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -1535,6 +1535,8 @@ int genphy_c45_pma_read_abilities(struct phy_device *phydev); int genphy_c45_read_status(struct phy_device *phydev); int genphy_c45_config_aneg(struct phy_device *phydev); int genphy_c45_loopback(struct phy_device *phydev, bool enable); +int genphy_c45_pma_resume(struct phy_device *phydev); +int genphy_c45_pma_suspend(struct phy_device *phydev); /* Generic C45 PHY driver */ extern struct phy_driver genphy_c45_driver; -- 2.31.1