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[209.132.180.67]) by mx.google.com with ESMTP id b128si1120804pfa.71.2018.04.18.05.50.31; Wed, 18 Apr 2018 05:50:46 -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=@agner.ch header.s=dkim header.b=rL9Zbi2o; 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 S1753920AbeDRMtT (ORCPT + 99 others); Wed, 18 Apr 2018 08:49:19 -0400 Received: from mail.kmu-office.ch ([178.209.48.109]:36494 "EHLO mail.kmu-office.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753815AbeDRMtR (ORCPT ); Wed, 18 Apr 2018 08:49:17 -0400 Received: from trochilidae.toradex.int (unknown [IPv6:2001:1620:c6e:10::3]) by mail.kmu-office.ch (Postfix) with ESMTPSA id 045AF5C0B22; Wed, 18 Apr 2018 14:49:15 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=agner.ch; s=dkim; t=1524055756; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:content-type:content-transfer-encoding: in-reply-to:references; bh=OfPIMYE3KFxKQkfuuspZAKH2Zsncts/W2cn9+VxyZC8=; b=rL9Zbi2oS+7Yg0xzCSz65BP1hBdNjeEd45ZxTCYhPCKm2QsWaQtT8uLESPSO5huQFM7IKD Ovu70kTuWkNq39xYI2oTjwrf0h7SM/FvMNFuMk1CsiHjz+6+EsJh4FCn17Jt42UJIrc6nu 1Zxs8lusug0Kn5mmOHnsjfpTapcBX6Q= From: Stefan Agner To: shawnguo@kernel.org, kernel@pengutronix.de Cc: fabio.estevam@nxp.com, mturquette@baylibre.com, sboyd@kernel.org, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Stefan Agner Subject: [PATCH] clk: imx6ull: use OSC clock during AXI rate change Date: Wed, 18 Apr 2018 14:49:08 +0200 Message-Id: <20180418124908.3079-1-stefan@agner.ch> X-Mailer: git-send-email 2.17.0 X-Spamd-Result: default: False [-2.10 / 15.00]; RCVD_TLS_ALL(0.00)[]; ASN(0.00)[asn:13030, ipnet:2001:1620::/32, country:CH]; RCVD_COUNT_ZERO(0.00)[0]; FROM_HAS_DN(0.00)[]; MID_CONTAINS_FROM(1.00)[]; TO_DN_SOME(0.00)[]; MIME_GOOD(-0.10)[text/plain]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; BAYES_HAM(-3.00)[100.00%]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[]; RCPT_COUNT_SEVEN(0.00)[9] Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On i.MX6 ULL using PLL3 seems to cause a freeze when setting the parent to IMX6UL_CLK_PLL3_USB_OTG. This only seems to appear since commit 6f9575e55632 ("clk: imx: Add CLK_IS_CRITICAL flag for busy divider and busy mux"), probably because the clock is now forced to be on. Fixes: 6f9575e55632("clk: imx: Add CLK_IS_CRITICAL flag for busy divider and busy mux") Signed-off-by: Stefan Agner --- This addresses a regression ssen on v4.17-rc1 where the kernel boots during clock initialization, see also: https://patchwork.kernel.org/patch/10295927/ drivers/clk/imx/clk-imx6ul.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/imx/clk-imx6ul.c b/drivers/clk/imx/clk-imx6ul.c index 114ecbb94ec5..12320118f8de 100644 --- a/drivers/clk/imx/clk-imx6ul.c +++ b/drivers/clk/imx/clk-imx6ul.c @@ -464,7 +464,7 @@ static void __init imx6ul_clocks_init(struct device_node *ccm_node) clk_set_rate(clks[IMX6UL_CLK_AHB], 99000000); /* Change periph_pre clock to pll2_bus to adjust AXI rate to 264MHz */ - clk_set_parent(clks[IMX6UL_CLK_PERIPH_CLK2_SEL], clks[IMX6UL_CLK_PLL3_USB_OTG]); + clk_set_parent(clks[IMX6UL_CLK_PERIPH_CLK2_SEL], clks[IMX6UL_CLK_OSC]); clk_set_parent(clks[IMX6UL_CLK_PERIPH], clks[IMX6UL_CLK_PERIPH_CLK2]); clk_set_parent(clks[IMX6UL_CLK_PERIPH_PRE], clks[IMX6UL_CLK_PLL2_BUS]); clk_set_parent(clks[IMX6UL_CLK_PERIPH], clks[IMX6UL_CLK_PERIPH_PRE]); -- 2.17.0