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Tue, 11 Jul 2023 13:58:30 -0700 (PDT) X-Google-Smtp-Source: APBJJlEDwoVz3zRB6ah8VU/FCjuuuOvOlH20gHcWLu5haldDqXSdHnX1ggzW6h5gC9xUcPFDK+Zpxw== X-Received: by 2002:a05:6358:340b:b0:134:c4dc:2c4e with SMTP id h11-20020a056358340b00b00134c4dc2c4emr5573607rwd.23.1689109110337; Tue, 11 Jul 2023 13:58:30 -0700 (PDT) Received: from halaney-x13s.attlocal.net ([2600:1700:1ff0:d0e0::22]) by smtp.gmail.com with ESMTPSA id j136-20020a81928e000000b00545a08184cesm785353ywg.94.2023.07.11.13.58.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Jul 2023 13:58:30 -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 3/3] net: stmmac: Use the max frequency possible for clk_ptp_ref Date: Tue, 11 Jul 2023 15:35:32 -0500 Message-ID: <20230711205732.364954-4-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 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230711_135833_691429_01FF7547 X-CRM114-Status: GOOD ( 10.12 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Using the max frequency allows for the best PTP timestamping resolution, so let's default to that. Signed-off-by: Andrew Halaney Reviewed-by: Simon Horman --- drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 231152ee5a32..c9a27a71a3f4 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -602,6 +602,11 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac) plat->clk_ptp_ref = NULL; dev_info(&pdev->dev, "PTP uses main clock\n"); } else { + /* Get the best resolution possible */ + rc = clk_set_rate(plat->clk_ptp_ref, ULONG_MAX); + if (rc) + dev_err(&pdev->dev, + "Failed to set clk_ptp_ref rate: %d\n", rc); plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref); dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate); }