From nobody Mon Feb 9 11:47:45 2026 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 E563AEB64DD for ; Tue, 11 Jul 2023 20:59:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231528AbjGKU7I (ORCPT ); Tue, 11 Jul 2023 16:59:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55926 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229742AbjGKU7E (ORCPT ); Tue, 11 Jul 2023 16:59:04 -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 9F93210F2 for ; Tue, 11 Jul 2023 13:58:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1689109097; 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=jiBOM1KuLZEvS0bvIGnIKQCXCP0aV2NwdEa0u2AGH3g=; b=AWCIC7iZgMM4gxSEo5JVuLBoF8kebLFYBbML5+nUKK5KWCAtbSMMPO2a5EDFZBtCuNU2b6 Y5JTe9DdEHg9RGM08GmFYY8d32yciMsYaNZNk9fThrzeJJq6Hdzf+8rIJ9zlqOVpZq0+Hv 8lTIsCgv0MtrZA7cAAbd/M9ABTpWrYI= Received: from mail-yw1-f200.google.com (mail-yw1-f200.google.com [209.85.128.200]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-112-FB4yFPHPOjKdEjRLdDSumA-1; Tue, 11 Jul 2023 16:58:16 -0400 X-MC-Unique: FB4yFPHPOjKdEjRLdDSumA-1 Received: by mail-yw1-f200.google.com with SMTP id 00721157ae682-56cf9a86277so68892817b3.3 for ; Tue, 11 Jul 2023 13:58:16 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689109095; x=1691701095; 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=jiBOM1KuLZEvS0bvIGnIKQCXCP0aV2NwdEa0u2AGH3g=; b=GNURucPaefzqDQ4Xxo852ZSbsRBqPMvj+X1mAORcywCaeixf0STUkV2hDCSCLRQnSc EN/gt4zDFkR++UKzXhgJSZTsOTB0PT0k7hEyoMcdvrjPxwagtuLXhFsd1hRhBaeEnKc6 UBUv8nV6Y/HRNR6JFeGGlvqC6HUNTJ2ylB3TUaV2xdUuSpBcyc3B+IUfbP5SICQy/A/H iUWvoj8hbYM1xhZm1mWwXkUPGpNkosNfPHpESgAa/PrUxbDOjzR5xWoPkeBrv17v6eYu dzEhp2omXJYNEftScIBhdeJGTwuLXl7SiuviVnfjETlV5sN2IMOsIiav1bqIO8gkK7IL FC3A== X-Gm-Message-State: ABy/qLa+E46n+Dd1+0DXcWQH+gfaasLOiUeRKZRMmD4c9pHtKvEr+Qh/ lUkTHMNFdrBqECzW2NSVid2GOz62zqnb7j3W4BioKwg8Y9kfdcLBVfubTO3GfIEeu7e2Ecx2fLj ForouAUT+XC9e8/b59pvd/fdo5aasIAbQhYxFL2KLLqVUkmWczsB3JAnrSKL02WQAUaTUtczxn4 W5jH3ywwUd X-Received: by 2002:a0d:dd0f:0:b0:55a:3ce9:dc3d with SMTP id g15-20020a0ddd0f000000b0055a3ce9dc3dmr16784179ywe.13.1689109095719; Tue, 11 Jul 2023 13:58:15 -0700 (PDT) X-Google-Smtp-Source: APBJJlGMM6rSAUBx2gHMgpN1hCMMVYXQ4ts3fvOEU1AYs0oR+Y47D9PvRxELDW1bK1hOX+hNQmSRfQ== X-Received: by 2002:a0d:dd0f:0:b0:55a:3ce9:dc3d with SMTP id g15-20020a0ddd0f000000b0055a3ce9dc3dmr16784156ywe.13.1689109095299; Tue, 11 Jul 2023 13:58:15 -0700 (PDT) Received: from halaney-x13s.attlocal.net ([2600:1700:1ff0:d0e0::22]) by smtp.gmail.com with ESMTPSA id j136-20020a81928e000000b00545a08184cesm785353ywg.94.2023.07.11.13.58.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Jul 2023 13:58:14 -0700 (PDT) From: Andrew Halaney To: linux-kernel@vger.kernel.org Cc: 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, Andrew Halaney Subject: [PATCH RFC/RFT net-next 2/3] net: stmmac: dwmac-qcom-ethqos: Use max frequency for clk_ptp_ref Date: Tue, 11 Jul 2023 15:35:31 -0500 Message-ID: <20230711205732.364954-3-ahalaney@redhat.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230711205732.364954-1-ahalaney@redhat.com> References: <20230711205732.364954-1-ahalaney@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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. 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/driv= ers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c index 757504ebb676..f9e7440520fa 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); } =20 +static void ethqos_ptp_clk_freq_config(struct stmmac_priv *priv) +{ + struct plat_stmmacenet_data *plat_dat =3D priv->plat; + int err; + + if (!plat_dat->clk_ptp_ref) + return; + + /* Max the PTP ref clock out to get the best resolution possible */ + err =3D 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 =3D 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 =3D pdev->dev.of_node; @@ -779,6 +796,7 @@ static int qcom_ethqos_probe(struct platform_device *pd= ev) plat_dat->bsp_priv =3D ethqos; plat_dat->fix_mac_speed =3D ethqos_fix_mac_speed; plat_dat->dump_debug_regs =3D rgmii_dump; + plat_dat->ptp_clk_freq_config =3D ethqos_ptp_clk_freq_config; plat_dat->has_gmac4 =3D 1; if (ethqos->has_emac_ge_3) plat_dat->dwmac4_addrs =3D &data->dwmac4_addrs; --=20 2.41.0