From patchwork Wed Jul 29 23:58:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anson Huang X-Patchwork-Id: 11691959 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 10DE513B1 for ; Thu, 30 Jul 2020 00:03:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EE75C208A9 for ; Thu, 30 Jul 2020 00:03:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728112AbgG3ADK (ORCPT ); Wed, 29 Jul 2020 20:03:10 -0400 Received: from inva021.nxp.com ([92.121.34.21]:48630 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727087AbgG3ADJ (ORCPT ); Wed, 29 Jul 2020 20:03:09 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 272F12010CB; Thu, 30 Jul 2020 02:03:08 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 9805E2010C8; Thu, 30 Jul 2020 02:03:01 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 4BBCD40302; Thu, 30 Jul 2020 02:02:53 +0200 (CEST) From: Anson Huang To: mturquette@baylibre.com, sboyd@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, aisheng.dong@nxp.com, arnd@arndb.de, peng.fan@nxp.com, abel.vesa@nxp.com, fugang.duan@nxp.com, daniel.baluta@nxp.com, yuehaibing@huawei.com, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Linux-imx@nxp.com Subject: [PATCH V8 1/6] clk: imx6sl: Use BIT(x) to avoid shifting signed 32-bit value by 31 bits Date: Thu, 30 Jul 2020 07:58:35 +0800 Message-Id: <1596067120-1193-2-git-send-email-Anson.Huang@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1596067120-1193-1-git-send-email-Anson.Huang@nxp.com> References: <1596067120-1193-1-git-send-email-Anson.Huang@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Use readl_relaxed() instead of __raw_readl(), and use BIT(x) instead of (1 << X) to fix below build warning reported by kernel test robot: drivers/clk/imx/clk-imx6sl.c:149:49: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned] while (!(__raw_readl(anatop_base + PLL_ARM) & BM_PLL_ARM_LOCK)) Signed-off-by: Anson Huang Reported-by: kernel test robot Acked-by: Arnd Bergmann --- changes since V7: - remove unnecessary linux/bitfield.h include. --- drivers/clk/imx/clk-imx6sl.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/clk/imx/clk-imx6sl.c b/drivers/clk/imx/clk-imx6sl.c index 0f647d1..8894876 100644 --- a/drivers/clk/imx/clk-imx6sl.c +++ b/drivers/clk/imx/clk-imx6sl.c @@ -14,19 +14,19 @@ #include "clk.h" #define CCSR 0xc -#define BM_CCSR_PLL1_SW_CLK_SEL (1 << 2) +#define BM_CCSR_PLL1_SW_CLK_SEL BIT(2) #define CACRR 0x10 #define CDHIPR 0x48 -#define BM_CDHIPR_ARM_PODF_BUSY (1 << 16) +#define BM_CDHIPR_ARM_PODF_BUSY BIT(16) #define ARM_WAIT_DIV_396M 2 #define ARM_WAIT_DIV_792M 4 #define ARM_WAIT_DIV_996M 6 #define PLL_ARM 0x0 -#define BM_PLL_ARM_DIV_SELECT (0x7f << 0) -#define BM_PLL_ARM_POWERDOWN (1 << 12) -#define BM_PLL_ARM_ENABLE (1 << 13) -#define BM_PLL_ARM_LOCK (1 << 31) +#define BM_PLL_ARM_DIV_SELECT 0x7f +#define BM_PLL_ARM_POWERDOWN BIT(12) +#define BM_PLL_ARM_ENABLE BIT(13) +#define BM_PLL_ARM_LOCK BIT(31) #define PLL_ARM_DIV_792M 66 static const char *step_sels[] = { "osc", "pll2_pfd2", }; @@ -145,7 +145,7 @@ static void imx6sl_enable_pll_arm(bool enable) val |= BM_PLL_ARM_ENABLE; val &= ~BM_PLL_ARM_POWERDOWN; writel_relaxed(val, anatop_base + PLL_ARM); - while (!(__raw_readl(anatop_base + PLL_ARM) & BM_PLL_ARM_LOCK)) + while (!(readl_relaxed(anatop_base + PLL_ARM) & BM_PLL_ARM_LOCK)) ; } else { writel_relaxed(saved_pll_arm, anatop_base + PLL_ARM);