From patchwork Thu Oct 12 13:30:19 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Zabel X-Patchwork-Id: 10002015 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D18286028A for ; Thu, 12 Oct 2017 13:30:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C1F1925F3E for ; Thu, 12 Oct 2017 13:30:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B6D9428DD9; Thu, 12 Oct 2017 13:30:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 4DE7B25F3E for ; Thu, 12 Oct 2017 13:30:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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:In-Reply-To: References:List-Owner; bh=N/p/j/xt/l5cE72nv3JwjRU9V2YeFI/90nc2uHNclUY=; b=Arm yVesKNjeLzTNie8Dw9KRky4RIF+3bVUmrqEiy7VAfJSk++DzvsV3LPMOMjoKuAUkU/H2l+Nep27ku HEk2eWn8BCXBGbrqC0LPsWUUdxZHI4BOGnmMgh2vjvknagw+Kt6N0g/WnGIChfbHzdBaeaVi1mOvl uswNTfwlRXHxaFj+jHQ0lGQ+WNTx5Oh7BXXTLslFGpbI8NBCoYjvPRxN0/CHHJUHzC8YsFHn6wsL0 0RH72oOH74+s0leYrRROQK7cNB3S2hEOoO0rlXqRP2qZ5mZMYJVUnV8UlHqamrT/bKic2edT2j2eF /N5wk6A1QKKwiZRufnuk1EpuZTR3B0w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1e2dZY-00080D-PV; Thu, 12 Oct 2017 13:30:48 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1e2dZS-0007VG-6T for linux-arm-kernel@lists.infradead.org; Thu, 12 Oct 2017 13:30:46 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7] helo=dude.pengutronix.de.) by metis.ext.pengutronix.de with esmtp (Exim 4.84_2) (envelope-from ) id 1e2dZ6-00034m-IP; Thu, 12 Oct 2017 15:30:20 +0200 From: Philipp Zabel To: linux-arm-kernel@lists.infradead.org Subject: [PATCH] ARM: dts: imx6ul-14x14-evk: switch lcdif pixel clock to video pll Date: Thu, 12 Oct 2017 15:30:19 +0200 Message-Id: <20171012133019.17086-1-p.zabel@pengutronix.de> X-Mailer: git-send-email 2.11.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: p.zabel@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20171012_063042_426002_BF84A73B X-CRM114-Status: UNSURE ( 9.12 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fabio Estevam , Shawn Guo , Philipp Zabel , kernel@pengutronix.de MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP By default, the lcdif_pre_sel mux is switched to the pll3_pfd1_540m PFD source. If this mux is allowed to propagate rate changes to its parent, setting the LCDIF pixel clock rate to 9 MHz, as required by the LCD panel, will cause the pll3_pfd1_540m PFD to be switched away from its nominal rate to 288 MHz. This has no negative side effects, as there are no other children to this PFD. Still, to avoid surprises, it might be preferrable to switch to the designated video PLL (pll5_video_div) as clock source for the LCDIF pixel clock. Signed-off-by: Philipp Zabel Reviewed-by: Fabio Estevam --- arch/arm/boot/dts/imx6ul-14x14-evk.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/imx6ul-14x14-evk.dts b/arch/arm/boot/dts/imx6ul-14x14-evk.dts index 9c23e017d86ad..e5d3ef88be608 100644 --- a/arch/arm/boot/dts/imx6ul-14x14-evk.dts +++ b/arch/arm/boot/dts/imx6ul-14x14-evk.dts @@ -147,6 +147,8 @@ &lcdif { + assigned-clocks = <&clks IMX6UL_CLK_LCDIF_PRE_SEL>; + assigned-clock-parents = <&clks IMX6UL_CLK_PLL5_VIDEO_DIV>; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_lcdif_dat &pinctrl_lcdif_ctrl>;