From patchwork Wed Jul 15 11:24:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu Beznea X-Patchwork-Id: 11665015 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 89A5413A4 for ; Wed, 15 Jul 2020 11:26:43 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6358020658 for ; Wed, 15 Jul 2020 11:26:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="DzxcJ9jw"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="CXb0loqH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6358020658 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=microchip.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=6fNcnPXc84h/gdp6yV86kHPcQHisTr6BzxIHQmVMbHM=; b=DzxcJ9jw3aBKQGwbYjUSvosN9 4E6JKCzDpqCeC876LxJJJKCUs81V5h0E6Hg8ZJQHPRyocAbXH3Ef/hl37cMwJRJBIgQ6NWFrC9G/N kQYwk8L0LrcW493cscCxDyoPHBDJRqKWT0d4mhBbe6VWtiRi2dOypX0eougVS1wIRAeczujHM2r63 XHDa8gGWV6N9l73nW1R72hjRogjkE7hrtwnht4qcMHAJpQGPkr0tB51m9wC8dHRNAfad4CkgumDpx 3eG3HG6cJwhQ+xdvunZAiiFJ6H87zebTzq9zWK9Kaqi+S4Byp6b8GezhQzNhWl/nFgaOTI7LAARs4 V1GO6ah9A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jvfWx-0004Lw-Nz; Wed, 15 Jul 2020 11:24:55 +0000 Received: from esa3.microchip.iphmx.com ([68.232.153.233]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jvfWs-0004J6-Ka for linux-arm-kernel@lists.infradead.org; Wed, 15 Jul 2020 11:24:51 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1594812290; x=1626348290; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=T1OYveV/D+zKAKeQwDPMk7Yyaqe/yTBKNsdgc95BSbk=; b=CXb0loqHDaUhfMm0kNs1BtvUELoia21+lxkercPyyLSSb9U3DE4U6VHb Hm8chSN/L/cSy0H0wVq5LLaNmxVsy5Fo0u2v8RFbK38T3qExbwczy85/m tDwCFlnvKos+2a8J8DmdUGMlVJ8JdFFZECRT1ZnUFb4Qd9O8DeL1HVEaa ni5Ke72mE8Bp+KATtg0+/64jSSbzDXPu2wXFjS10e13sQfzlIPYliZJVq i0s10UdOn3z4lrY2qy8xsAV20syaTZDRjr1xdN82zmeEywRbpKjRFcz8G XEXiNIcM+phlcffPuzgPr5NEXTGJLxt43M9mAp6kYoot12J7kFwdf0jCv Q==; IronPort-SDR: ViUFu9WFGhwE9g7juizxJ6T7yuXVEYnfiqsGkltEd2s7kBf2xIUKUDKH7kFUJ1ImoEHSyimq26 fTueqBKHmkx54rWzfv0Zjqo3dqHVZta3HZnd8eMmFghqnnkZJoQUBs4EulVWh/4zV7oYm0bXqj LC2iqOhIw++KzFg7AnEIcb3L4xQs5uxnnsV+EDCzWFwiZUl1u4wCw43anLlB2Ert/KOlL90BVa 07i93OT51NnaE7atMqOcdjtnb7MJOO0yFCZ+ZMpZ0ruROSAmf8YcxClidO0UnFm2UapvzgIKjf ESs= X-IronPort-AV: E=Sophos;i="5.75,355,1589266800"; d="scan'208";a="83962792" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa3.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 15 Jul 2020 04:24:49 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Wed, 15 Jul 2020 04:24:49 -0700 Received: from m18063-ThinkPad-T460p.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Wed, 15 Jul 2020 04:24:13 -0700 From: Claudiu Beznea To: , , , , Subject: [PATCH 04/19] clk: at91: sam9x60-pll: use frac when computing pll frequency Date: Wed, 15 Jul 2020 14:24:12 +0300 Message-ID: <1594812267-6697-5-git-send-email-claudiu.beznea@microchip.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1594812267-6697-1-git-send-email-claudiu.beznea@microchip.com> References: <1594812267-6697-1-git-send-email-claudiu.beznea@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200715_072450_975137_059F15BD X-CRM114-Status: UNSURE ( 9.05 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.5 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [68.232.153.233 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H4 RBL: Very Good reputation (+4) [68.232.153.233 listed in wl.mailspike.net] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Claudiu Beznea , linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, bbrezillon@kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org According to datasheet the PLL frequency is computed using the following formula: parent_rate * (mul + 1 + frac/2^22)/(div + 1). Use this formula. Fixes: a436c2a447e59 ("clk: at91: add sam9x60 PLL driver") Signed-off-by: Claudiu Beznea --- drivers/clk/at91/clk-sam9x60-pll.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/clk/at91/clk-sam9x60-pll.c b/drivers/clk/at91/clk-sam9x60-pll.c index 3522eae2edd6..d3152c0afcbf 100644 --- a/drivers/clk/at91/clk-sam9x60-pll.c +++ b/drivers/clk/at91/clk-sam9x60-pll.c @@ -152,7 +152,8 @@ static unsigned long sam9x60_pll_recalc_rate(struct clk_hw *hw, { struct sam9x60_pll *pll = to_sam9x60_pll(hw); - return (parent_rate * (pll->mul + 1)) / (pll->div + 1); + return DIV_ROUND_CLOSEST_ULL((parent_rate * (pll->mul + 1) + + ((u64)parent_rate * pll->frac >> 22)), (pll->div + 1)); } static long sam9x60_pll_get_best_div_mul(struct sam9x60_pll *pll,