From nobody Sun Apr 5 13:27:44 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 902193090F1; Wed, 18 Feb 2026 12:13:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771416806; cv=none; b=CIKe+ML5b3iMUSJAvt199f6uvsNBJBhDFH8omv8pjKy97xo2hhNdOfKx5ZhEg8FL5FldMnSgMuaC4kCOmUDl25DEGfMAHuTGRBj8D6nwwNGN9OG2aE4tbN2MFv+b7K1chzR4BKyT0U6SSXkyUxXuTnHBkKYg+KWAvBz5GS96Tww= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771416806; c=relaxed/simple; bh=gIfvuKQzIkpL52yvmmroKBHHCJs47s4C3JGzCDEiBpE=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=tIaEtITrhMLToXK490sJnZO2cIs9vHSO/6YuTt19SDDOLf2EraUzh8Cb8noqObeI9yfoKq0AhSJUdj7aUvVU3UBAbzVMQyuFm9n6oA3dhgHLCV1eo1wq4ox7T35Oi4NIvFL+ojHFhwV9why9MreBy1qlcJzJCcrhqX87/+Ng02Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [223.64.68.227]) by gateway (Coremail) with SMTP id _____8DxNMHirJVpGk0TAA--.13316S3; Wed, 18 Feb 2026 20:13:22 +0800 (CST) Received: from kernelserver (unknown [223.64.68.227]) by front1 (Coremail) with SMTP id qMiowJAxVcDdrJVpjhRIAA--.20818S2; Wed, 18 Feb 2026 20:13:21 +0800 (CST) From: Huacai Chen To: Greg Kroah-Hartman , Sasha Levin , Huacai Chen Cc: Xuerui Wang , stable@vger.kernel.org, Andrew Lunn , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Yanteng Si , linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, netdev@vger.kernel.org, Huacai Chen , Hongliang Wang Subject: [PATCH for 5.15 & 6.1] net: stmmac: dwmac-loongson: Set clk_csr_i to 100-150MHz Date: Wed, 18 Feb 2026 20:13:10 +0800 Message-ID: <20260218121310.2545149-1-chenhuacai@loongson.cn> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJAxVcDdrJVpjhRIAA--.20818S2 X-CM-SenderInfo: hfkh0x5xdftxo6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBj93XoW7CrWDtF13CrW7Jr4UCrW5twc_yoW8GF15pr WfZa42g34ayr12k3Z8Z34DZFy5Za4YgFZrGa1xtw4fur92ka4jqryYgFZ8AFW29FW5C3Wa vr4qkr15GFs8CwbCm3ZEXasCq-sJn29KB7ZKAUJUUUjr529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUB2b4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Cr0_Gr1UM28EF7xvwVC2z280aVAFwI0_Gr0_Cr1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6r4j6r4UJwAaw2AFwI0_GFv_Wryle2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2xF0c Ia020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_Wrv_ ZF1lYx0Ex4A2jsIE14v26r4j6F4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwI xGrwCY1x0262kKe7AKxVW8ZVWrXwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWU JVW8JwCFI7km07C267AKxVWUAVWUtwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4 vE14v26r106r1rMI8E67AF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIxAIcVC0I7IY x2IY67AKxVW5JVW7JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Cr0_Gr1UMIIF0xvE42xK8V AvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI42IY6I8E87Iv6xkF7I0E 14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjxUgxwIDUUUU Content-Type: text/plain; charset="utf-8" commit e1aa5ef892fb4fa9014a25e87b64b97347919d37 upstream. Current clk_csr_i setting of Loongson STMMAC (including LS7A1000/2000 and LS2K1000/2000/3000) are copy & paste from other drivers. In fact, Loongson STMMAC use 125MHz clocks and need 62 freq division to within 2.5MHz, meeting most PHY MDC requirement. So fix by setting clk_csr_i to 100-150MHz, otherwise some PHYs may link fail. Cc: stable@vger.kernel.org Fixes: 30bba69d7db40e7 ("stmmac: pci: Add dwmac support for Loongson") Signed-off-by: Hongliang Wang Signed-off-by: Huacai Chen --- drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers= /net/ethernet/stmicro/stmmac/dwmac-loongson.c index 472ea1bb454c..ed2d7d4a85f0 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c @@ -11,7 +11,7 @@ =20 static int loongson_default_data(struct plat_stmmacenet_data *plat) { - plat->clk_csr =3D 2; /* clk_csr_i =3D 20-35MHz & MDC =3D clk_csr_i/16 */ + plat->clk_csr =3D 1; /* clk_csr_i =3D 100-150MHz & MDC =3D clk_csr_i/62 */ plat->has_gmac =3D 1; plat->force_sf_dma_mode =3D 1; =20 --=20 2.52.0