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Miller" , Eric Dumazet , "Jakub Kicinski" , Paolo Abeni , Subject: [PATCH net-next v3 1/2] net: lan743x: add RMII strap status detection for PCI11x1x Date: Mon, 8 Jun 2026 15:34:34 +0530 Message-ID: <20260608100435.11214-2-thangaraj.s@microchip.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260608100435.11214-1-thangaraj.s@microchip.com> References: <20260608100435.11214-1-thangaraj.s@microchip.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Extend pci11x1x_strap_get_status() to read the RMII strap bits from the STRAP_READ register. The is_rmii_en flag is initialized to false and updated based on the hardware strap only if SGMII is not already enabled. This ensures correct interface identification during adapter initialization. Signed-off-by: Thangaraj Samynathan --- Changes in v3: - Update debug log to report selected interface (SGMII/RMII/RGMII) instead of only SGMII enable/disable state drivers/net/ethernet/microchip/lan743x_main.c | 12 ++++++++++-- drivers/net/ethernet/microchip/lan743x_main.h | 3 +++ 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c index 1cdce35e1423..0798f3f1f435 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.c +++ b/drivers/net/ethernet/microchip/lan743x_main.c @@ -42,6 +42,7 @@ static void pci11x1x_strap_get_status(struct lan743x_adapter *adapter) u32 strap; int ret; + adapter->is_rmii_en = false; /* Timeout = 100 (i.e. 1 sec (10 msce * 100)) */ ret = lan743x_hs_syslock_acquire(adapter, 100); if (ret < 0) { @@ -73,8 +74,15 @@ static void pci11x1x_strap_get_status(struct lan743x_adapter *adapter) adapter->is_sgmii_en = false; } } - netif_dbg(adapter, drv, adapter->netdev, - "SGMII I/F %sable\n", adapter->is_sgmii_en ? "En" : "Dis"); + + if (!adapter->is_sgmii_en && strap & STRAP_READ_USE_RMII_EN_) { + if (strap & STRAP_READ_RMII_EN_) + adapter->is_rmii_en = true; + } + + netif_dbg(adapter, drv, adapter->netdev, "Selected I/F: %s\n", + adapter->is_sgmii_en ? "SGMII" : + adapter->is_rmii_en ? "RMII" : "RGMII"); } static bool is_pci11x1x_chip(struct lan743x_adapter *adapter) diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h index 1573c8f9c993..1f8d9294a6ef 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.h +++ b/drivers/net/ethernet/microchip/lan743x_main.h @@ -36,7 +36,9 @@ #define FPGA_SGMII_OP BIT(24) #define STRAP_READ (0x0C) +#define STRAP_READ_USE_RMII_EN_ BIT(23) #define STRAP_READ_USE_SGMII_EN_ BIT(22) +#define STRAP_READ_RMII_EN_ BIT(7) #define STRAP_READ_SGMII_EN_ BIT(6) #define STRAP_READ_SGMII_REFCLK_ BIT(5) #define STRAP_READ_SGMII_2_5G_ BIT(4) @@ -1072,6 +1074,7 @@ struct lan743x_adapter { struct lan743x_rx rx[LAN743X_USED_RX_CHANNELS]; bool is_pci11x1x; bool is_sgmii_en; + bool is_rmii_en; /* protect ethernet syslock */ spinlock_t eth_syslock_spinlock; bool eth_syslock_en; -- 2.34.1