From 60e81d0d2855690347bc479c9c20b4ad5de0b703 Mon Sep 17 00:00:00 2001 From: Grygorii Strashko Date: Thu, 19 Sep 2019 11:16:37 +0300 Subject: [PATCH] net: ti: cpsw: enable 10Mbps link speed support in rgmii mode According to TRMs the 10Mbps link speed is supported in RGMII only when CPSW2G MAC SL is configured for External Control ("in band") mode CPSW_SL_MACCTRL.EXT_EN(18) = 1. Hence update cpsw_slave_update_link() to follow documentation. [1] https://patchwork.kernel.org/patch/10285239/ Signed-off-by: Grygorii Strashko --- drivers/net/ti/cpsw.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ti/cpsw.c b/drivers/net/ti/cpsw.c index 20ddb44dd8..f0d008f0f5 100644 --- a/drivers/net/ti/cpsw.c +++ b/drivers/net/ti/cpsw.c @@ -33,6 +33,7 @@ DECLARE_GLOBAL_DATA_PTR; #define GIGABITEN BIT(7) #define FULLDUPLEXEN BIT(0) #define MIIEN BIT(15) +#define CTL_EXT_EN BIT(18) /* DMA Registers */ #define CPDMA_TXCONTROL 0x004 #define CPDMA_RXCONTROL 0x014 @@ -489,6 +490,8 @@ static int cpsw_slave_update_link(struct cpsw_slave *slave, mac_control |= FULLDUPLEXEN; if (phy->speed == 100) mac_control |= MIIEN; + if (phy->speed == 10 && phy_interface_is_rgmii(phy)) + mac_control |= CTL_EXT_EN; } if (mac_control == slave->mac_control) -- 2.25.1