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 7F12F2472A6; Tue, 11 Nov 2025 01:40:12 +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=1762825212; cv=none; b=b214eE9J6bPnTM/mV57riJP13Idwosh1jjAClw0+WTKlFGew8ae3X88HBTtWvxMIq1Cd/8J4BYl94X4JjN89XfeEh901M+KxqqCTIVkLziZ1t1svSiIKSiS6gQxb40IxdnqySkJhgHfKneC+vwyHkjzMcLPZtXapz5iyrIwtoNU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762825212; c=relaxed/simple; bh=s1OtRQEnmoPbGBMT1KbarnsgBxcE2dyPdtk8ksFG8BA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HFwldDn9wW4KHCdsKzAH127D+WiZq3uIG61vpqY3c/uU0uEtaOLj5VVienv7jiouL5xmse4mLRGHzTGu3mO/1mt5Hp8xh63MTfvYre8xOssUghDBoz76LcNQiGX5mgp/OS8WCSjymfpr2LjbKe0AJk3r0nvk28oS44vC8RVD5EQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ms0zYPJB; 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="ms0zYPJB" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 20B6DC116B1; Tue, 11 Nov 2025 01:40:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1762825212; bh=s1OtRQEnmoPbGBMT1KbarnsgBxcE2dyPdtk8ksFG8BA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ms0zYPJBUQFam6n4kVrTt2hEOKrteZJ0sxiAeTV3eEiCVfyih0XX/AMWZ0spiarFp 776vxFJ2rOqGaoaaN/slK+JvqnLumS60wvZniOyew5tW4Yhseli9vbd+Oqx6R2qGwE KcxLWrUXRYMh+HnlisUWhB+/u5LxB3VVHKdIdF6w= 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 6.17 706/849] clk: at91: clk-master: Add check for divide by 3 Date: Tue, 11 Nov 2025 09:44:36 +0900 Message-ID: <20251111004553.503888364@linuxfoundation.org> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20251111004536.460310036@linuxfoundation.org> References: <20251111004536.460310036@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 6.17-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 7a544e429d34e..d5ea2069ec83a 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