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[84.72.156.211]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-af91a1e8306sm757276466b.83.2025.08.04.08.47.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Aug 2025 08:47:57 -0700 (PDT) From: Lothar Rubusch To: alexandre.belloni@bootlin.com, michal.simek@amd.com, srinivas.neeli@xilinx.com Cc: linux-rtc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, l.rubusch@gmail.com Subject: [PATCH v1 0/1] rtc: zynqmp: ensure correct RTC calibration Date: Mon, 4 Aug 2025 15:47:49 +0000 Message-Id: <20250804154750.28249-1-l.rubusch@gmail.com> X-Mailer: git-send-email 2.39.5 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250804_084759_791779_25FB1318 X-CRM114-Status: GOOD ( 10.62 ) 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 We've observed intermittent failures with the current implementation on our Xilinx hardware. These issues were not present prior to the commit referenced by the Fixes tag, using the same hardware setup. The problem appears to be identical to the one described here: https://adaptivesupport.amd.com/s/article/000036886?language=en_US Instead of explicitly writing 0x7FFF to the calibration register using devmem, the patch now resets the register. Ivan Vera (1): rtc: zynqmp: ensure correct RTC calibration drivers/rtc/rtc-zynqmp.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) base-commit: 260f6f4fda93c8485c8037865c941b42b9cba5d2 -- 2.39.5