From mboxrd@z Thu Jan 1 00:00:00 1970 From: Vinod Koul Subject: [PATCH v3 5/5] net: dsa: qca8k: disable delay for RGMII mode Date: Mon, 21 Jan 2019 14:43:18 +0530 Message-ID: <20190121091318.20079-6-vkoul@kernel.org> References: <20190121091318.20079-1-vkoul@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190121091318.20079-1-vkoul@kernel.org> Sender: netdev-owner@vger.kernel.org To: David S Miller Cc: netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, Niklas Cassel , Bjorn Andersson , Vinod Koul , Andrew Lunn , Florian Fainelli List-Id: linux-arm-msm@vger.kernel.org In RGMII mode we should not have any delay in port MAC, so disable the delay. Signed-off-by: Vinod Koul --- drivers/net/dsa/qca8k.c | 16 ++++------------ 1 file changed, 4 insertions(+), 12 deletions(-) diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c index 7e97e620bd44..a4b6cda38016 100644 --- a/drivers/net/dsa/qca8k.c +++ b/drivers/net/dsa/qca8k.c @@ -420,7 +420,7 @@ qca8k_mib_init(struct qca8k_priv *priv) static int qca8k_set_pad_ctrl(struct qca8k_priv *priv, int port, int mode) { - u32 reg; + u32 reg, val; switch (port) { case 0: @@ -439,17 +439,9 @@ qca8k_set_pad_ctrl(struct qca8k_priv *priv, int port, int mode) */ switch (mode) { case PHY_INTERFACE_MODE_RGMII: - qca8k_write(priv, reg, - QCA8K_PORT_PAD_RGMII_EN | - QCA8K_PORT_PAD_RGMII_TX_DELAY(3) | - QCA8K_PORT_PAD_RGMII_RX_DELAY(3)); - - /* According to the datasheet, RGMII delay is enabled through - * PORT5_PAD_CTRL for all ports, rather than individual port - * registers - */ - qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL, - QCA8K_PORT_PAD_RGMII_RX_DELAY_EN); + /* RGMII mode means no delay so don't enable the delay */ + val = QCA8K_PORT_PAD_RGMII_EN; + qca8k_write(priv, reg, val); break; case PHY_INTERFACE_MODE_SGMII: qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN); -- 2.20.1