Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1E7F62D7D59; Wed, 25 Feb 2026 07:00:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772002800; cv=none; b=k4raM65x6c+aLLWiPXlEiEYuUboqeoiCqWAdWO+QZnu9yd6pb4gy+C/Pg1TW0WcOA1SdGqtcwN/xZGX/EandAuFvk265ErNNS4x9AOT0CZB0ivnbXBkHzeQtCpb2m96hhQaq3dSJD3EiIsMLNYAtFAWmbxmTBLhRjIc0IT0pHUs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772002800; c=relaxed/simple; bh=wtf9XbNa/HNW4G0ox8nS3eLQP0E1ioruvPogU5FzYdg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eW8ymrIa3m17EC9zjIa0Eo9rQ7cz3fKCBolKPH/7ooO6vWsBf7BxfbMjLgat2a2gNrae0wcdn7bClD4JzwdJi3XLToLSkVr3jOve8AUhXecph8yCvSG/Vpsrz2bDZ6O+gAn4AA3qsLaM2kaXvvCKmOhlWy7v+81MIhSwZb77UCY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=f8Cj0kKO; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="f8Cj0kKO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E9E8FC19422; Wed, 25 Feb 2026 06:59:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1772002800; bh=wtf9XbNa/HNW4G0ox8nS3eLQP0E1ioruvPogU5FzYdg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=f8Cj0kKO4265NQsqn0RNRmPuElsmd5HMG9l0BbLVulOJoaufYoAkl5IKPD6osghmg Y4mCR8C0nDOMCGFIQjcGdzrXoe47w1/3Sy5ep44Y+m7xCm4x4P3SGYSaj3D/Qil9VY ee6wkm8CBi7P3YBNRL2NxEqzItLMIJO1E/jmVl2o= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hongliang Wang , Huacai Chen , Jakub Kicinski Subject: [PATCH 6.18 641/641] net: stmmac: dwmac-loongson: Set clk_csr_i to 100-150MHz Date: Tue, 24 Feb 2026 17:26:07 -0800 Message-ID: <20260225012404.035482553@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260225012348.915798704@linuxfoundation.org> References: <20260225012348.915798704@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Huacai Chen 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 Link: https://patch.msgid.link/20260203062901.2158236-1-chenhuacai@loongson.cn Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c @@ -90,8 +90,8 @@ static void loongson_default_data(struct /* Get bus_id, this can be overwritten later */ plat->bus_id = pci_dev_id(pdev); - /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */ - plat->clk_csr = STMMAC_CSR_20_35M; + /* clk_csr_i = 100-150MHz & MDC = clk_csr_i/62 */ + plat->clk_csr = STMMAC_CSR_100_150M; plat->core_type = DWMAC_CORE_GMAC; plat->force_sf_dma_mode = 1;