From mboxrd@z Thu Jan 1 00:00:00 1970 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 0A71B2E11B9; Mon, 13 Apr 2026 16:27:33 +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=1776097654; cv=none; b=moDswYfMzbTYG4Mj2S05MwHMdTY7+FiIdZP0YJr1VO5wobRoLdDP4GGxEBQTx9do6VXo/+Njk6aAOUS/oPV5CZbIcgXC1P03zD9YQ4FdGm6Wv+J1voUwRZLlGX6TJxg8BdY0FotiI8S1ugLxXVH3Ras62nhUo2P3yZvcRWtaCyo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097654; c=relaxed/simple; bh=pVx5VU7ywhr7MgDXuq7yASemaNLmO3YCq03GdbNmg7c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DC1QhjlWfdU/UELYki5fmsg/ewbCAaj4P9VvPekIvEWCqC3N+nqbaOb/VBA/fuU3oB8AMyRqBU+UvNu4tkpbttxMDoCyXJ/Ig7qZs3ulCP5kYGrA6cPt0tPHMdkSBjggnxpdlucdoOWQ8psXOwNSM/PFXGGq8J4k0c8HmUtwmto= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ABOqtQU3; 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="ABOqtQU3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 75004C2BCAF; Mon, 13 Apr 2026 16:27:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776097653; bh=pVx5VU7ywhr7MgDXuq7yASemaNLmO3YCq03GdbNmg7c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ABOqtQU3zuMWGyPhD4pCQknOc3+Nda8MmL4nFuy0ucjNks6mszucqGoNJYVnrV2bz ZMUyKVkIukmz8YkNzAQPShGBg6yn7v31zfysMeaY7Cnxkin9OX5ame/IEeQbgGoepN Vm/Vho1G8R8UA2Frh750z/DD5Lgu8QwXmNF3GBGQ= 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 5.15 220/570] net: stmmac: dwmac-loongson: Set clk_csr_i to 100-150MHz Date: Mon, 13 Apr 2026 17:55:51 +0200 Message-ID: <20260413155838.699143989@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155830.386096114@linuxfoundation.org> References: <20260413155830.386096114@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 5.15-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: Huacai Chen Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c @@ -11,7 +11,7 @@ static int loongson_default_data(struct plat_stmmacenet_data *plat) { - plat->clk_csr = 2; /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */ + plat->clk_csr = 1; /* clk_csr_i = 100-150MHz & MDC = clk_csr_i/62 */ plat->has_gmac = 1; plat->force_sf_dma_mode = 1;