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[209.132.180.67]) by mx.google.com with ESMTP id q23-v6si4430438pls.101.2018.05.28.09.09.46; Mon, 28 May 2018 09:10:01 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=fLMOQBuN; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755521AbeE1QJC (ORCPT + 99 others); Mon, 28 May 2018 12:09:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:34092 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936673AbeE1KOI (ORCPT ); Mon, 28 May 2018 06:14:08 -0400 Received: from localhost (LFbn-1-12247-202.w90-92.abo.wanadoo.fr [90.92.61.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5D5BF2086D; Mon, 28 May 2018 10:14:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1527502447; bh=VFgNrKNYrB4u3RtiGJuGWhUsq7EAg92pqfYYnUL2OA0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fLMOQBuNYhgCnKggpVIuxNKzb3mAFHsx9AI/dKKfXZInn0DtyWvGIjUMthSIThL25 qKJ26F6D6RKBja70Eoo3AW+wAqhYNxi/YIAtHFECgiEcTtd56y2Qo3LRzP+/2Cgd/X X8ECBiyii26uFWUF0ESsTvY/ipefxP4bpVml4xso= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andrzej Hajda , Tomasz Figa , Chanwoo Choi , Sylwester Nawrocki , Sasha Levin Subject: [PATCH 3.18 176/185] clk: samsung: exynos5260: Fix PLL rates Date: Mon, 28 May 2018 12:03:37 +0200 Message-Id: <20180528100114.980879258@linuxfoundation.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180528100050.700971285@linuxfoundation.org> References: <20180528100050.700971285@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Andrzej Hajda [ Upstream commit cdb68fbd4e7962be742c4f29475220c5bf28d8a5 ] Rates declared in PLL rate tables should match exactly rates calculated from the PLL coefficients. If that is not the case, rate of the PLL's child clock might be set not as expected. For instance, if in the PLL rates table we have a 393216000 Hz entry and the real value as returned by the PLL's recalc_rate callback is 393216003, after setting PLL's clk rate to 393216000 clk_get_rate will return 393216003. If we now attempt to set rate of a PLL's child divider clock to 393216000/2 its rate will be 131072001, rather than 196608000. That is, the divider will be set to 3 instead of 2, because 393216003/2 is greater than 196608000. To fix this issue declared rates are changed to exactly match rates generated by the PLL, as calculated from the P, M, S, K coefficients. Signed-off-by: Andrzej Hajda Acked-by: Tomasz Figa Acked-by: Chanwoo Choi Signed-off-by: Sylwester Nawrocki Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/clk/samsung/clk-exynos5260.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/clk/samsung/clk-exynos5260.c +++ b/drivers/clk/samsung/clk-exynos5260.c @@ -102,7 +102,7 @@ static struct samsung_pll_rate_table pll PLL_36XX_RATE(480000000, 160, 2, 2, 0), PLL_36XX_RATE(432000000, 144, 2, 2, 0), PLL_36XX_RATE(400000000, 200, 3, 2, 0), - PLL_36XX_RATE(394073130, 459, 7, 2, 49282), + PLL_36XX_RATE(394073128, 459, 7, 2, 49282), PLL_36XX_RATE(333000000, 111, 2, 2, 0), PLL_36XX_RATE(300000000, 100, 2, 2, 0), PLL_36XX_RATE(266000000, 266, 3, 3, 0),