From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 66AE934676C; Fri, 21 Nov 2025 13:51:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763733109; cv=none; b=oWf6gXLXyBY/dBWeYI2403gitPVn4N3FvstFOJVyF5e91qgN25KlvTw9sTmQ0A3UQ5EZmtJ5nhd7JWZi7t/dVsYHrNtJGqj2pRsEFh4Dnm2oz90qA0smtE2OeYuP8moUlej62nMvLBy3yX9a9F2nJsNmqOjRI2xxz0DgFhDvVbk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763733109; c=relaxed/simple; bh=P3ftVvbL2UiDQlfVeYl6kwbfvejN2RVMfbtDjiePcZg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DG+USx42T0L6Q8svs/fGJPa2GOsn7kuHt7jrnz8BAU+ROn+GEFLF/7siGfqIuh4QeG3fpL5igqZ5g/nr5iqjwy6chp0r8fTgXBmfMg+g0hYoydYWCJBps6B5OcHdX1l15yzN+5Jc6CH7siJzbkKS+6/kDsNccPxjEOX5Of/mDFQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UPlrTkGi; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="UPlrTkGi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E5F8EC4CEF1; Fri, 21 Nov 2025 13:51:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1763733109; bh=P3ftVvbL2UiDQlfVeYl6kwbfvejN2RVMfbtDjiePcZg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UPlrTkGivkLSCia56S6XRIA/brErRHUchod0PiNOPLY9JaNVEov/Ulb+hnXYBaha9 xj0SmFUWCQQ5AZeE36Mv2QwoMNu9tO8HOQDC8yKugecuy+R+ju8LliMvccCVEBQ5IA ua6XgXEPunGld3VigpPZluZk7tOU4EimX0mq+2go= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ryan Wanner , Nicolas Ferre , Sasha Levin Subject: [PATCH 6.6 311/529] clk: at91: clk-master: Add check for divide by 3 Date: Fri, 21 Nov 2025 14:10:10 +0100 Message-ID: <20251121130242.090022086@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251121130230.985163914@linuxfoundation.org> References: <20251121130230.985163914@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ryan Wanner [ Upstream commit e0237f5635727d64635ec6665e1de9f4cacce35c ] A potential divider for the master clock is div/3. The register configuration for div/3 is MASTER_PRES_MAX. The current bit shifting method does not work for this case. Checking for MASTER_PRES_MAX will ensure the correct decimal value is stored in the system. Signed-off-by: Ryan Wanner Signed-off-by: Nicolas Ferre Signed-off-by: Sasha Levin --- drivers/clk/at91/clk-master.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/clk/at91/clk-master.c b/drivers/clk/at91/clk-master.c index 15c46489ba850..4c87a0f789de1 100644 --- a/drivers/clk/at91/clk-master.c +++ b/drivers/clk/at91/clk-master.c @@ -580,6 +580,9 @@ clk_sama7g5_master_recalc_rate(struct clk_hw *hw, { struct clk_master *master = to_clk_master(hw); + if (master->div == MASTER_PRES_MAX) + return DIV_ROUND_CLOSEST_ULL(parent_rate, 3); + return DIV_ROUND_CLOSEST_ULL(parent_rate, (1 << master->div)); } -- 2.51.0