From nobody Fri Apr 3 08:00:30 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id AEF083064BA; Wed, 18 Feb 2026 12:12:34 +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=1771416756; cv=none; b=Uz3h7ZQ+eW3w0ECrZ2jCWL7K14l5LWXbBGqc7ZantYX7RWnqg53QwT8raqz8wLFKeBFGhTMM+Vg2eRXTgv3dLZ7i9qdlSKHaRtIzoXU7W39KlKYUf2PQ//EgNC4kBjB8SHUiJTGR5joK0zayWxtpTgI+YlugKKsOhnDiIAYN94Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771416756; c=relaxed/simple; bh=gvY48VTQ6xlhmYUWk7lSy+5q47b0BW6hSwgfoujHq4E=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=SGOvmFl7QDZaJhMioyM68eW7MCr+ySWLxdnqWxRrJmrA8+ILk46Xkv3UEqYaBlBCuE95hntkS1GCce6l5mPlEdwCKuN6HFn36yQWfsRZXAvvl1ws2lZKqFUAmw5dkbGrQBvO4j+kMOTxia35E4t/huTRMy8Q+BndY3GAoW3vXcE= 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 _____8AxScKvrJVp3kwTAA--.60636S3; Wed, 18 Feb 2026 20:12:31 +0800 (CST) Received: from kernelserver (unknown [223.64.68.227]) by front1 (Coremail) with SMTP id qMiowJBxDOGrrJVpdhRIAA--.31302S2; Wed, 18 Feb 2026 20:12:30 +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 6.12] net: stmmac: dwmac-loongson: Set clk_csr_i to 100-150MHz Date: Wed, 18 Feb 2026 20:12:19 +0800 Message-ID: <20260218121219.2545107-1-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: qMiowJBxDOGrrJVpdhRIAA--.31302S2 X-CM-SenderInfo: hfkh0x5xdftxo6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBj93XoW7CrWDtF13CrW7Jr4UCrW5twc_yoW8Gw4Dpr WxZa47W3yayr1jy3Z5Xw1UZFy5Za4YgFW7GF4xtw4furZaya4jqryUKFZ8ZFW7ZFWUC3Wa vr1qkr45GFn8CwbCm3ZEXasCq-sJn29KB7ZKAUJUUUUD529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUBYb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW8JVWxJwA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_ Gr0_Gr1UM2kKe7AKxVWUAVWUtwAS0I0E0xvYzxvE52x082IY62kv0487Mc804VCY07AIYI kI8VC2zVCFFI0UMc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUtVWr XwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI4 8JMxkF7I0En4kS14v26r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j 6r4UMxCIbckI1I0E14v26r126r1DMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwV AFwI0_JrI_JrWlx4CE17CEb7AF67AKxVW8ZVWrXwCIc40Y0x0EwIxGrwCI42IY6xIIjxv2 0xvE14v26r4j6ryUMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4 v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x0267AK xVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7IU8XTm3UUUUU== 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 0cb8e23a7828..4b0860d3ad8a 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c @@ -90,7 +90,7 @@ static void loongson_default_data(struct pci_dev *pdev, /* Get bus_id, this can be overwritten later */ plat->bus_id =3D pci_dev_id(pdev); =20 - 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