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 C154B24A05D; Wed, 25 Feb 2026 01:41:40 +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=1771983700; cv=none; b=M0g33LhYOVv3JRS0NBjFIIIIaFs/j+cQzZU6DdZPEzfneBEZshR3/3ZaNZdIIUB63hNKjzB697n+pGqh3b+6gTR2mbBzuM17vUOsoaSYbaP9E8c9harQ0i3Ig6DqzshhZzFqhemMqZtO1FrMy7Iyf18y/dX0dNcSvIGfjPffJuk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771983700; c=relaxed/simple; bh=wT9wL3U4M9i9SbWKXC4s8/daJfPm7G3ImKmPZcQKCrk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cSXjGMJR4/aUUjQ5DXmVYeDYZHVwMngyW8EUbjNG7jxspu7UJlc1k6kwm50JZPlrdGTtd6g29yLkTWBpgYNUXoucnyAYVa0Ew+wzXxpcuBA840Nt0/wOQi2V5qFJfhrXjqxbtDHj5SNNvvST0AqZ3V/FpEdJH9hd09N84fd+GgM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=wrSjDrf3; 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="wrSjDrf3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 86DB0C116D0; Wed, 25 Feb 2026 01:41:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1771983700; bh=wT9wL3U4M9i9SbWKXC4s8/daJfPm7G3ImKmPZcQKCrk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wrSjDrf3XiRYJkFiKwhhDHMZR4xYvIQATRmJT8SIN1zojqcK2nl0DJIZkGbjpo3MS LqVHlXsrCKfoy+vnjWtPV0BOKmykDKNVjKDn4Dp4KL0sIis4JZ0NnPi8mnVX+tME5E SE3jgnQVwIX8kK2xbwDEyn1Wj0cIH+4wrQwp4t64= 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 6.19 781/781] net: stmmac: dwmac-loongson: Set clk_csr_i to 100-150MHz Date: Tue, 24 Feb 2026 17:24:50 -0800 Message-ID: <20260225012418.868479123@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260225012359.695468795@linuxfoundation.org> References: <20260225012359.695468795@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 6.19-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 @@ -91,8 +91,8 @@ 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;