From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 56FBFC2BA83 for ; Fri, 14 Feb 2020 17:44:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3120A20873 for ; Fri, 14 Feb 2020 17:44:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581702259; bh=3mMW9xAzJDDMfYwE+KOeTghpU9ATN3hhSY+NwNKGAbo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=bLbPZUCZogRzvcrrllGqZBu0rwYyFZsjkDNWkWHRqzzv6sJ2doOZj91bshQc+9UEp sHzHfwqQUfT1BAq0KYDj0sBV6YHVjspVIQ4uhMockNpqGMrAxrERcla2qD9ZNdjpLX 4ZuZDG8+7duDaNxVUOX/2GF51BTNXJMqGF491HxI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389541AbgBNQDF (ORCPT ); Fri, 14 Feb 2020 11:03:05 -0500 Received: from mail.kernel.org ([198.145.29.99]:49378 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389447AbgBNQCq (ORCPT ); Fri, 14 Feb 2020 11:02:46 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EF70124684; Fri, 14 Feb 2020 16:02:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696165; bh=3mMW9xAzJDDMfYwE+KOeTghpU9ATN3hhSY+NwNKGAbo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1FlUYGt7UFejq/TNF2kLMo8TmyVUNcpf2ukc6NuxyXDG1EqpO5XJOmR6sSl4AHvPm fBg/YwkobGsjnWz6x2fAqNZZpZGE572/M7D3RHbbyniJ6DPoM4IXs5pA1e6AmoI5NZ MWzHKlscPH6Vj5PfV1yUDZF01wpb/yuDF2jRpUX4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Eugen Hristev , Stephen Boyd , Sasha Levin , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.4 041/459] clk: at91: sam9x60: fix programmable clock prescaler Date: Fri, 14 Feb 2020 10:54:51 -0500 Message-Id: <20200214160149.11681-41-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214160149.11681-1-sashal@kernel.org> References: <20200214160149.11681-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Eugen Hristev [ Upstream commit 66d9f5214c9ba1c151478f99520b6817302d50dc ] The prescaler works as parent rate divided by (PRES + 1) (is_pres_direct == 1) It does not work in the way of parent rate shifted to the right by (PRES + 1), which means division by 2^(PRES + 1) (is_pres_direct == 0) Thus is_pres_direct must be enabled for this SoC, to make the right computation. This field was added in commit 45b06682113b ("clk: at91: fix programmable clock for sama5d2") SAM9X60 has the same field as SAMA5D2 in the PCK Fixes: 01e2113de9a5 ("clk: at91: add sam9x60 pmc driver") Signed-off-by: Eugen Hristev Link: https://lkml.kernel.org/r/1575977088-16781-1-git-send-email-eugen.hristev@microchip.com Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/at91/sam9x60.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/clk/at91/sam9x60.c b/drivers/clk/at91/sam9x60.c index 86238d5ecb4da..77398aefeb6db 100644 --- a/drivers/clk/at91/sam9x60.c +++ b/drivers/clk/at91/sam9x60.c @@ -47,6 +47,7 @@ static const struct clk_programmable_layout sam9x60_programmable_layout = { .pres_shift = 8, .css_mask = 0x1f, .have_slck_mck = 0, + .is_pres_direct = 1, }; static const struct clk_pcr_layout sam9x60_pcr_layout = { -- 2.20.1