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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 49BBEC282CD for ; Mon, 28 Jan 2019 16:25:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1175A21741 for ; Mon, 28 Jan 2019 16:25:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548692710; bh=9xCp2zIj+Wa2he7z/Tj+OVODAITyjJghfE9HxiibY90=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qqEpBOKSpk8GFuOHX7XkCnaU7AM1ld/WLm6DdSnfSqmU5X/89sUStSwVkv9Eyhgcm 1w8p3GLXlwBrBZwbZ8qVAeASDZbm/aW0H09iBk2sznJJc+x3/Yw7FWipDlJJ4Xd25t Gk7lvlZpTAnzUQehZvOcPCCdH8cH4NSpmpyNZDks= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389862AbfA1QZI (ORCPT ); Mon, 28 Jan 2019 11:25:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:33864 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732536AbfA1QZD (ORCPT ); Mon, 28 Jan 2019 11:25:03 -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 47D2420879; Mon, 28 Jan 2019 16:25:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548692703; bh=9xCp2zIj+Wa2he7z/Tj+OVODAITyjJghfE9HxiibY90=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ow9LfudDz98LhMBKzjG/AlHN/voIh/7porjrukgp1NsGw7IdVFDwN532Mx6FqFmcG OHue7u09EsjVYuRsiZbeB0a8+lMKh12y+vPsRG5yktfWA9idu/zPwyD9ragupizGuy CA0l3ISz4ha+/arMnm1Q3Fl21G4vV2z6DTCIOvbM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Anson Huang , Anson Huang , Stephen Boyd , Sasha Levin , linux-clk@vger.kernel.org Subject: [PATCH AUTOSEL 4.4 37/80] clk: imx6sl: ensure MMDC CH0 handshake is bypassed Date: Mon, 28 Jan 2019 11:23:18 -0500 Message-Id: <20190128162401.58841-37-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190128162401.58841-1-sashal@kernel.org> References: <20190128162401.58841-1-sashal@kernel.org> MIME-Version: 1.0 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: Anson Huang [ Upstream commit 0efcc2c0fd2001a83240a8c3d71f67770484917e ] Same as other i.MX6 SoCs, ensure unused MMDC channel's handshake is bypassed, this is to make sure no request signal will be generated when periphe_clk_sel is changed or SRC warm reset is triggered. Signed-off-by: Anson Huang Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/imx/clk-imx6sl.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/clk/imx/clk-imx6sl.c b/drivers/clk/imx/clk-imx6sl.c index 1be6230a07af..8b6306dc5fc6 100644 --- a/drivers/clk/imx/clk-imx6sl.c +++ b/drivers/clk/imx/clk-imx6sl.c @@ -17,6 +17,8 @@ #include "clk.h" +#define CCDR 0x4 +#define BM_CCM_CCDR_MMDC_CH0_MASK (1 << 17) #define CCSR 0xc #define BM_CCSR_PLL1_SW_CLK_SEL (1 << 2) #define CACRR 0x10 @@ -414,6 +416,10 @@ static void __init imx6sl_clocks_init(struct device_node *ccm_node) clks[IMX6SL_CLK_USDHC3] = imx_clk_gate2("usdhc3", "usdhc3_podf", base + 0x80, 6); clks[IMX6SL_CLK_USDHC4] = imx_clk_gate2("usdhc4", "usdhc4_podf", base + 0x80, 8); + /* Ensure the MMDC CH0 handshake is bypassed */ + writel_relaxed(readl_relaxed(base + CCDR) | + BM_CCM_CCDR_MMDC_CH0_MASK, base + CCDR); + imx_check_clocks(clks, ARRAY_SIZE(clks)); clk_data.clks = clks; -- 2.19.1