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=-9.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 CEAF5C32756 for ; Thu, 8 Aug 2019 23:48:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9EDA1217D7 for ; Thu, 8 Aug 2019 23:48:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="bJHukxtm" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404921AbfHHXsL (ORCPT ); Thu, 8 Aug 2019 19:48:11 -0400 Received: from hqemgate16.nvidia.com ([216.228.121.65]:17859 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404919AbfHHXrG (ORCPT ); Thu, 8 Aug 2019 19:47:06 -0400 Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 08 Aug 2019 16:47:06 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Thu, 08 Aug 2019 16:47:05 -0700 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Thu, 08 Aug 2019 16:47:05 -0700 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 8 Aug 2019 23:47:04 +0000 Received: from hqnvemgw01.nvidia.com (172.20.150.20) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Thu, 8 Aug 2019 23:47:04 +0000 Received: from skomatineni-linux.nvidia.com (Not Verified[10.110.103.110]) by hqnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Thu, 08 Aug 2019 16:47:04 -0700 From: Sowjanya Komatineni To: , , , , , , , CC: , , , , , , , , , , , , , , , , , , Subject: [PATCH v8 13/21] clk: tegra210: Use fence_udelay during PLLU init Date: Thu, 8 Aug 2019 16:46:52 -0700 Message-ID: <1565308020-31952-14-git-send-email-skomatineni@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1565308020-31952-1-git-send-email-skomatineni@nvidia.com> References: <1565308020-31952-1-git-send-email-skomatineni@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1565308026; bh=RJjtD/wR8zo8cV5BUXlwlwAAOA63IpXqmMNKlX37eJo=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=bJHukxtmYY1lD+fE5oOiIEb72edP23a/Wc4qU3ZBcabHZjRo0qGic2nGXyw8zivHf 2e6S4L6xcOD5/AItHM/b1mtQNAfRfgJxAo7mQX+xzRHVou/QCGjKenqpX0jtIpz4yP yDC1IcsbP/VWpXZeNTT+Olp25+K68h4PQfkWViVZTnDmG2YEM8NAUqQgb3T/1qfYGa cTFi0uL3MwvKgeZzlBdjtjhXoaZoXGFHdvFNPyv4rr7L0kk7okP9rPX+H3xb5FG/hS jL5OjigukBphflm54DdJ2/kcLDy9I2XbKwimJ7XLgWhzvObsW3HqOje5MFmtK4Y0J6 35bP1bK70UmsQ== Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org This patch uses fence_udelay rather than udelay during PLLU initialization to ensure writes to clock registers happens before waiting for specified delay. Acked-by: Thierry Reding Signed-off-by: Sowjanya Komatineni --- drivers/clk/tegra/clk-tegra210.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/clk/tegra/clk-tegra210.c b/drivers/clk/tegra/clk-tegra210.c index 4721ee030d1c..998bf60b219a 100644 --- a/drivers/clk/tegra/clk-tegra210.c +++ b/drivers/clk/tegra/clk-tegra210.c @@ -2841,7 +2841,7 @@ static int tegra210_enable_pllu(void) reg = readl_relaxed(clk_base + pllu.params->ext_misc_reg[0]); reg &= ~BIT(pllu.params->iddq_bit_idx); writel_relaxed(reg, clk_base + pllu.params->ext_misc_reg[0]); - udelay(5); + fence_udelay(5, clk_base); reg = readl_relaxed(clk_base + PLLU_BASE); reg &= ~GENMASK(20, 0); @@ -2849,7 +2849,7 @@ static int tegra210_enable_pllu(void) reg |= fentry->n << 8; reg |= fentry->p << 16; writel(reg, clk_base + PLLU_BASE); - udelay(1); + fence_udelay(1, clk_base); reg |= PLL_ENABLE; writel(reg, clk_base + PLLU_BASE); @@ -2895,12 +2895,12 @@ static int tegra210_init_pllu(void) reg = readl_relaxed(clk_base + XUSB_PLL_CFG0); reg &= ~XUSB_PLL_CFG0_PLLU_LOCK_DLY_MASK; writel_relaxed(reg, clk_base + XUSB_PLL_CFG0); - udelay(1); + fence_udelay(1, clk_base); reg = readl_relaxed(clk_base + PLLU_HW_PWRDN_CFG0); reg |= PLLU_HW_PWRDN_CFG0_SEQ_ENABLE; writel_relaxed(reg, clk_base + PLLU_HW_PWRDN_CFG0); - udelay(1); + fence_udelay(1, clk_base); reg = readl_relaxed(clk_base + PLLU_BASE); reg &= ~PLLU_BASE_CLKENABLE_USB; -- 2.7.4