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[93.42.71.246]) by smtp.googlemail.com with ESMTPSA id ke12sm308592ejc.32.2021.10.07.17.23.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Oct 2021 17:23:01 -0700 (PDT) From: Ansuel Smith To: Andrew Lunn , Vivien Didelot , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Jakub Kicinski , Rob Herring , Heiner Kallweit , Russell King , Ansuel Smith , netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [net PATCH v2 02/15] drivers: net: phy: at803x: add DAC amplitude fix for 8327 phy Date: Fri, 8 Oct 2021 02:22:12 +0200 Message-Id: <20211008002225.2426-3-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211008002225.2426-1-ansuelsmth@gmail.com> References: <20211008002225.2426-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org QCA8327 internal phy require DAC amplitude adjustement set to +6% with 100m speed. Also add additional define to report a change of the same reg in QCA8337. (different scope it does set 1000m voltage) Add link_change_notify function to set the proper amplitude adjustement on PHY_RUNNING state and disable on any other state. Fixes: c6bcec0d6928 ("net: phy: at803x: add support for qca 8327 A variant internal phy") Signed-off-by: Ansuel Smith --- drivers/net/phy/at803x.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index c6c87b82c95c..5208ea8fdd69 100644 --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -87,6 +87,8 @@ #define AT803X_PSSR_MR_AN_COMPLETE 0x0200 #define AT803X_DEBUG_REG_0 0x00 +#define QCA8327_DEBUG_MANU_CTRL_EN BIT(2) +#define QCA8337_DEBUG_MANU_CTRL_EN GENMASK(3, 2) #define AT803X_DEBUG_RX_CLK_DLY_EN BIT(15) #define AT803X_DEBUG_REG_5 0x05 @@ -1314,9 +1316,37 @@ static int qca83xx_config_init(struct phy_device *phydev) break; } + /* QCA8327 require DAC amplitude adjustment for 100m set to +6%. + * Disable on init and enable only with 100m speed following + * qca original source code. + */ + if (phydev->drv->phy_id == QCA8327_A_PHY_ID || + phydev->drv->phy_id == QCA8327_B_PHY_ID) + at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0, + QCA8327_DEBUG_MANU_CTRL_EN, 0); + return 0; } +static void qca83xx_link_change_notify(struct phy_device *phydev) +{ + /* QCA8337 doesn't require DAC Amplitude adjustement */ + if (phydev->drv->phy_id == QCA8337_PHY_ID) + return; + + /* Set DAC Amplitude adjustment to +6% for 100m on link running */ + if (phydev->state == PHY_RUNNING) { + if (phydev->speed == SPEED_100) + at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0, + QCA8327_DEBUG_MANU_CTRL_EN, + QCA8327_DEBUG_MANU_CTRL_EN); + } else { + /* Reset DAC Amplitude adjustment */ + at803x_debug_reg_mask(phydev, AT803X_DEBUG_REG_0, + QCA8327_DEBUG_MANU_CTRL_EN, 0); + } +} + static int qca83xx_resume(struct phy_device *phydev) { int ret, val; @@ -1471,6 +1501,7 @@ static struct phy_driver at803x_driver[] = { .phy_id_mask = QCA8K_PHY_ID_MASK, .name = "Qualcomm Atheros 8337 internal PHY", /* PHY_GBIT_FEATURES */ + .link_change_notify = qca83xx_link_change_notify, .probe = at803x_probe, .flags = PHY_IS_INTERNAL, .config_init = qca83xx_config_init, @@ -1486,6 +1517,7 @@ static struct phy_driver at803x_driver[] = { .phy_id_mask = QCA8K_PHY_ID_MASK, .name = "Qualcomm Atheros 8327-A internal PHY", /* PHY_GBIT_FEATURES */ + .link_change_notify = qca83xx_link_change_notify, .probe = at803x_probe, .flags = PHY_IS_INTERNAL, .config_init = qca83xx_config_init, @@ -1501,6 +1533,7 @@ static struct phy_driver at803x_driver[] = { .phy_id_mask = QCA8K_PHY_ID_MASK, .name = "Qualcomm Atheros 8327-B internal PHY", /* PHY_GBIT_FEATURES */ + .link_change_notify = qca83xx_link_change_notify, .probe = at803x_probe, .flags = PHY_IS_INTERNAL, .config_init = qca83xx_config_init, -- 2.32.0