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[91.139.201.119]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45895386627sm481325e9.19.2025.07.29.13.37.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Jul 2025 13:37:04 -0700 (PDT) From: Ivaylo Ivanov To: Sascha Hauer Cc: barebox@lists.infradead.org Date: Tue, 29 Jul 2025 23:36:57 +0300 Message-ID: <20250729203659.1858575-3-ivo.ivanov.ivanov1@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250729203659.1858575-1-ivo.ivanov.ivanov1@gmail.com> References: <20250729203659.1858575-1-ivo.ivanov.ivanov1@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250729_133706_832054_88C65756 X-CRM114-Status: GOOD ( 13.08 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.9 required=4.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH v1 2/4] clocksource: arm_architected_timer: support clock-frequency X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) Some platforms, like the Samsung Galaxy S8, leave CNTFRQ_EL0 unset in the previous stage bootloader. Therefore reading it causes a hang and the boot proccess is halted. Since on such retail devices there is no way to set it without replacing the entire boot chain, allow setting a value from clock-frequency whenever it's passed. Signed-off-by: Ivaylo Ivanov --- drivers/clocksource/arm_architected_timer.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/clocksource/arm_architected_timer.c b/drivers/clocksource/arm_architected_timer.c index 9a1f2d2b..daced94c 100644 --- a/drivers/clocksource/arm_architected_timer.c +++ b/drivers/clocksource/arm_architected_timer.c @@ -24,7 +24,16 @@ static struct clocksource cs = { static int arm_arch_timer_probe(struct device *dev) { - cs.mult = clocksource_hz2mult(get_cntfrq(), cs.shift); + u32 cntfrq; + int ret; + + /* Some platforms don't set CNTFRQ_EL0 before barebox */ + ret = of_property_read_u32(dev->of_node, "clock-frequency", &cntfrq); + + if (ret) + cntfrq = get_cntfrq(); + + cs.mult = clocksource_hz2mult(cntfrq, cs.shift); return init_clock(&cs); } -- 2.43.0