From patchwork Tue Jul 25 21:04:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Halaney X-Patchwork-Id: 13327061 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1989DC001DE for ; Tue, 25 Jul 2023 21:31:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231318AbjGYVbP (ORCPT ); Tue, 25 Jul 2023 17:31:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60198 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231297AbjGYVbI (ORCPT ); Tue, 25 Jul 2023 17:31:08 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 234981FEC for ; Tue, 25 Jul 2023 14:30:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1690320624; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=M6R5PqHz89a5dYS6wq5jIGBjMTrYBr/afZbcaHTTyIA=; b=BammLYoDblRMEhIessf1ogwK0egFBi8MdptZnOrnAkwAtaiBpKNBS+pM8uNDntY8/KItGV 7eFDa1fdDmtnAknrV+hz1kJPlch9yxC/h44AWqBdii+rhqr+lm0NcIS9V2d/T9OPvq0o6L SqlhzM2SJ6f53OONeUiv6t/GaYIEyN8= Received: from mail-qk1-f197.google.com (mail-qk1-f197.google.com [209.85.222.197]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-462-lKdk_wNIMJGTy04LVcMX2Q-1; Tue, 25 Jul 2023 17:30:21 -0400 X-MC-Unique: lKdk_wNIMJGTy04LVcMX2Q-1 Received: by mail-qk1-f197.google.com with SMTP id af79cd13be357-7656c94fc4eso809011785a.2 for ; Tue, 25 Jul 2023 14:30:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690320621; x=1690925421; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=M6R5PqHz89a5dYS6wq5jIGBjMTrYBr/afZbcaHTTyIA=; b=SfjvXtYs6K0t2P1zplEslgaGnFgemiECy+xuxViHf2C6lwKQWv/Xr42u+C/KDQVtTp FRcjxp3z6KuAqvdiA42ChJojS1iaHRqz3i0r1Fef4w2aRlgrKcSIeeGqzYtrHZZhlAL7 ludmBTqYgbzdUEPSp4UMRbQfhsPrn37t1bLyZ5Nxr+mS9kU32+Jrts3N8LageaDQUL37 HM2CU4xqSEcd/pkE+kDN2/Wznzyh/Ilzw2XR8WjTcnUejV4nyHOZNuMSQU6ITN0XOg6N vYREbFZ0b6xD1anXQoqMGLGkaTpnva0vAUFibG9+JHuHglnO9miX6Gus0MLQPxgfXPbL fkfQ== X-Gm-Message-State: ABy/qLZV1OJtFpWnInevhtt2wPinTpe4dPuj1YyNc5iflOlZ7oczlEpq wVTmRmrUKZQkabS6RzZEAnC//TRRjT3MUDywijKN436uzZl9GSKXis5rLKr8yTxDj4EJAg1bCYI EZRRl/q5kHonQ6C+XSOykgS9UMQ== X-Received: by 2002:a05:620a:2545:b0:768:156e:41b8 with SMTP id s5-20020a05620a254500b00768156e41b8mr171814qko.56.1690320621303; Tue, 25 Jul 2023 14:30:21 -0700 (PDT) X-Google-Smtp-Source: APBJJlEXEDMipNpnjboiVX9tymuPzO29w0eF8hLR09Ab5g7ZDyLrlEARGaZBlmf5qh4U8wb5xzUttQ== X-Received: by 2002:a05:620a:2545:b0:768:156e:41b8 with SMTP id s5-20020a05620a254500b00768156e41b8mr171797qko.56.1690320620999; Tue, 25 Jul 2023 14:30:20 -0700 (PDT) Received: from fedora.redhat.com ([2600:1700:1ff0:d0e0::17]) by smtp.gmail.com with ESMTPSA id j3-20020a37c243000000b00767d7307490sm3943067qkm.34.2023.07.25.14.30.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Jul 2023 14:30:20 -0700 (PDT) From: Andrew Halaney To: linux-kernel@vger.kernel.org Cc: ahalaney@redhat.com, linux-arm-kernel@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, netdev@vger.kernel.org, mcoquelin.stm32@gmail.com, pabeni@redhat.com, kuba@kernel.org, edumazet@google.com, davem@davemloft.net, joabreu@synopsys.com, alexandre.torgue@foss.st.com, peppe.cavallaro@st.com, bhupesh.sharma@linaro.org, vkoul@kernel.org, linux-arm-msm@vger.kernel.org, jsuraj@qti.qualcomm.com, Simon Horman Subject: [PATCH net-next v2 2/2] net: stmmac: dwmac-qcom-ethqos: Use max frequency for clk_ptp_ref Date: Tue, 25 Jul 2023 16:04:26 -0500 Message-ID: <20230725211853.895832-4-ahalaney@redhat.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230725211853.895832-2-ahalaney@redhat.com> References: <20230725211853.895832-2-ahalaney@redhat.com> MIME-Version: 1.0 Content-type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Qualcomm clocks can set their frequency to a variety of levels generally. Let's use the max for clk_ptp_ref to ensure the best timestamping resolution possible. Without this, the default value of the clock is used. For sa8775p-ride this is 19.2 MHz, far less than the 230.4 MHz possible. Reviewed-by: Simon Horman Signed-off-by: Andrew Halaney --- .../stmicro/stmmac/dwmac-qcom-ethqos.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c index 735525ba8b93..a85501874801 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c @@ -694,6 +694,23 @@ static void ethqos_clks_disable(void *data) ethqos_clks_config(data, false); } +static void ethqos_ptp_clk_freq_config(struct stmmac_priv *priv) +{ + struct plat_stmmacenet_data *plat_dat = priv->plat; + int err; + + if (!plat_dat->clk_ptp_ref) + return; + + /* Max the PTP ref clock out to get the best resolution possible */ + err = clk_set_rate(plat_dat->clk_ptp_ref, ULONG_MAX); + if (err) + netdev_err(priv->dev, "Failed to max out clk_ptp_ref: %d\n", err); + plat_dat->clk_ptp_rate = clk_get_rate(plat_dat->clk_ptp_ref); + + netdev_dbg(priv->dev, "PTP rate %d\n", plat_dat->clk_ptp_rate); +} + static int qcom_ethqos_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -779,6 +796,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev) plat_dat->bsp_priv = ethqos; plat_dat->fix_mac_speed = ethqos_fix_mac_speed; plat_dat->dump_debug_regs = rgmii_dump; + plat_dat->ptp_clk_freq_config = ethqos_ptp_clk_freq_config; plat_dat->has_gmac4 = 1; if (ethqos->has_emac_ge_3) plat_dat->dwmac4_addrs = &data->dwmac4_addrs;