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Sat, 14 Nov 2026 17:21:01 -0800 (PST) Received: from romain-ThinkPad-P14s-Gen-5-AMD.tail433d9c.ts.net (lfbn-ncy-1-251-132.w83-194.abo.wanadoo.fr. [83.194.94.132]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-49c6020bb0fsm12967006f8f.34.2026.11.14.17.21.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Nov 2026 17:21:00 -0800 (PST) From: Romain TISSERAND To: Chen-Yu Tsai , Jernej Skrabec , Samuel Holland Cc: Stephen Boyd , Brian Masney , Jerome Brunet , Maxime Ripard , Frank Oltmanns , linux-clk@vger.kernel.org, linux-sunxi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] clk: sunxi-ng: nkm: avoid 32-bit overflow in rate calculations Date: Sun, 15 Nov 2026 02:20:59 +0100 Message-ID: <20261115012059.1022197-1-romain.tisserand@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261101203336.1360239-1-romain.tisserand@gmail.com> References: <20261101203336.1360239-1-romain.tisserand@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi, Gentle ping on this fix, sent two weeks ago. It still applies as is on sunxi/clk-for-7.5 and on 7.4-rc3. On 32-bit sunxi the N-K-M rate math wraps above 4.29 GHz, so the clock framework reports half the real pll-mipi rate on the A33 (594 MHz programmed, 287 MHz reported), which broke the PocketGo S30 panel. Any comment, or could it go in for 7.5? Thanks, Romain