From: Justin Lai <justinlai0215@realtek.com>
To: <kuba@kernel.org>
Cc: <davem@davemloft.net>, <edumazet@google.com>, <pabeni@redhat.com>,
<andrew+netdev@lunn.ch>, <linux-kernel@vger.kernel.org>,
<netdev@vger.kernel.org>, <horms@kernel.org>,
<pkshih@realtek.com>, <larry.chiu@realtek.com>,
Justin Lai <justinlai0215@realtek.com>
Subject: [PATCH net] rtase: Fix flow control configuration
Date: Fri, 27 Mar 2026 11:29:43 +0800 [thread overview]
Message-ID: <20260327032943.58569-1-justinlai0215@realtek.com> (raw)
Fix hardware setting to allow flow control to be configured via
ethtool.
Fixes: 85dd839ad1e5 ("rtase: Implement hardware configuration function")
Signed-off-by: Justin Lai <justinlai0215@realtek.com>
---
drivers/net/ethernet/realtek/rtase/rtase.h | 4 ++++
drivers/net/ethernet/realtek/rtase/rtase_main.c | 3 +++
2 files changed, 7 insertions(+)
diff --git a/drivers/net/ethernet/realtek/rtase/rtase.h b/drivers/net/ethernet/realtek/rtase/rtase.h
index b9209eb6ea73..9bd6872474c1 100644
--- a/drivers/net/ethernet/realtek/rtase/rtase.h
+++ b/drivers/net/ethernet/realtek/rtase/rtase.h
@@ -153,6 +153,10 @@ enum rtase_registers {
#define RTASE_FORCE_TXFLOW_EN BIT(10)
#define RTASE_RX_CHKSUM BIT(5)
+ RTASE_GPHY_STD_00 = 0x6024,
+#define RTASE_RXFLOW_EN BIT(7)
+#define RTASE_TXFLOW_EN BIT(6)
+
RTASE_Q0_RX_DESC_ADDR0 = 0x00E4,
RTASE_Q0_RX_DESC_ADDR4 = 0x00E8,
RTASE_Q1_RX_DESC_ADDR0 = 0x4000,
diff --git a/drivers/net/ethernet/realtek/rtase/rtase_main.c b/drivers/net/ethernet/realtek/rtase/rtase_main.c
index ef13109c49cf..bde9bccfb5a9 100644
--- a/drivers/net/ethernet/realtek/rtase/rtase_main.c
+++ b/drivers/net/ethernet/realtek/rtase/rtase_main.c
@@ -974,6 +974,9 @@ static void rtase_hw_config(struct net_device *dev)
rtase_hw_set_features(dev, dev->features);
/* enable flow control */
+ reg_data16 = rtase_r16(tp, RTASE_GPHY_STD_00);
+ reg_data16 &= ~(RTASE_TXFLOW_EN | RTASE_RXFLOW_EN);
+ rtase_w16(tp, RTASE_GPHY_STD_00, reg_data16);
reg_data16 = rtase_r16(tp, RTASE_CPLUS_CMD);
reg_data16 |= (RTASE_FORCE_TXFLOW_EN | RTASE_FORCE_RXFLOW_EN);
rtase_w16(tp, RTASE_CPLUS_CMD, reg_data16);
--
2.40.1
reply other threads:[~2026-03-27 3:30 UTC|newest]
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