From patchwork Thu Jan 26 14:20:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 648248 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 79048C64EC5 for ; Thu, 26 Jan 2023 14:23:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231958AbjAZOXE (ORCPT ); Thu, 26 Jan 2023 09:23:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56312 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231867AbjAZOXC (ORCPT ); Thu, 26 Jan 2023 09:23:02 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C56C12583; Thu, 26 Jan 2023 06:23:00 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id D16EAB81DE6; Thu, 26 Jan 2023 14:22:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7B873C433D2; Thu, 26 Jan 2023 14:22:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1674742977; bh=PJLRhF0N1IQ7Gq3TQcph77IiU5e79uPUOVm8qGIdNmg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lZFyf+904uF5h0zs0Np8I+y9pVSqrwQLkwm98FKmRRVNg9VR22fdIF3CPCoTi6btN N7QFo42YR8ODqaIjMQ7snZrw/DWSoqcG8Jw4LWOb1B5x6hBBVv88tZR4zudiDzEUQo 4XvUQZhdANOsp3XPfy1hLqCZJ1LQVUXW1hMniQ2MCMWBo3dUedqObg/sbMd7Ny9r0o PTImEEoUmUITcx8yGjOoSxjJl7qTGZFi96fXmEcmNXzM+YagBTcFUK0u8Ynm1yu0Ai aQUtQawoTBpAAem8rfv7HkVA9ajHZ/a7ti6fMTwtMfyg1NcEUwzvmUdOKNQifxFKgk wnQ/9qTueCHtg== Received: from johan by xi.lan with local (Exim 4.94.2) (envelope-from ) id 1pL39c-0006iI-6U; Thu, 26 Jan 2023 15:23:04 +0100 From: Johan Hovold To: Alexandre Belloni , Bjorn Andersson Cc: Andy Gross , Konrad Dybcio , Alessandro Zummo , Rob Herring , Krzysztof Kozlowski , Maximilian Luz , linux-arm-msm@vger.kernel.org, linux-rtc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Johan Hovold Subject: [PATCH 03/24] rtc: pm8xxx: use regmap_update_bits() Date: Thu, 26 Jan 2023 15:20:36 +0100 Message-Id: <20230126142057.25715-4-johan+linaro@kernel.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230126142057.25715-1-johan+linaro@kernel.org> References: <20230126142057.25715-1-johan+linaro@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Switch to using regmap_update_bits() instead of open coding read-modify-write accesses. Signed-off-by: Johan Hovold --- drivers/rtc/rtc-pm8xxx.c | 87 ++++++++++------------------------------ 1 file changed, 22 insertions(+), 65 deletions(-) diff --git a/drivers/rtc/rtc-pm8xxx.c b/drivers/rtc/rtc-pm8xxx.c index f49bda999e02..8c2847ac64f4 100644 --- a/drivers/rtc/rtc-pm8xxx.c +++ b/drivers/rtc/rtc-pm8xxx.c @@ -78,10 +78,10 @@ static int pm8xxx_rtc_set_time(struct device *dev, struct rtc_time *tm) { int rc, i; unsigned long secs, irq_flags; - u8 value[NUM_8_BIT_RTC_REGS], alarm_enabled = 0, rtc_disabled = 0; - unsigned int ctrl_reg, rtc_ctrl_reg; struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; + u8 value[NUM_8_BIT_RTC_REGS]; + bool alarm_enabled; if (!rtc_dd->allow_set_time) return -ENODEV; @@ -97,31 +97,16 @@ static int pm8xxx_rtc_set_time(struct device *dev, struct rtc_time *tm) spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); - rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg); + rc = regmap_update_bits_check(rtc_dd->regmap, regs->alarm_ctrl, + regs->alarm_en, 0, &alarm_enabled); if (rc) goto rtc_rw_fail; - if (ctrl_reg & regs->alarm_en) { - alarm_enabled = 1; - ctrl_reg &= ~regs->alarm_en; - rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg); - if (rc) - goto rtc_rw_fail; - } - /* Disable RTC H/w before writing on RTC register */ - rc = regmap_read(rtc_dd->regmap, regs->ctrl, &rtc_ctrl_reg); + rc = regmap_update_bits(rtc_dd->regmap, regs->ctrl, PM8xxx_RTC_ENABLE, 0); if (rc) goto rtc_rw_fail; - if (rtc_ctrl_reg & PM8xxx_RTC_ENABLE) { - rtc_disabled = 1; - rtc_ctrl_reg &= ~PM8xxx_RTC_ENABLE; - rc = regmap_write(rtc_dd->regmap, regs->ctrl, rtc_ctrl_reg); - if (rc) - goto rtc_rw_fail; - } - /* Write 0 to Byte[0] */ rc = regmap_write(rtc_dd->regmap, regs->write, 0); if (rc) @@ -139,16 +124,14 @@ static int pm8xxx_rtc_set_time(struct device *dev, struct rtc_time *tm) goto rtc_rw_fail; /* Enable RTC H/w after writing on RTC register */ - if (rtc_disabled) { - rtc_ctrl_reg |= PM8xxx_RTC_ENABLE; - rc = regmap_write(rtc_dd->regmap, regs->ctrl, rtc_ctrl_reg); - if (rc) - goto rtc_rw_fail; - } + rc = regmap_update_bits(rtc_dd->regmap, regs->ctrl, PM8xxx_RTC_ENABLE, + PM8xxx_RTC_ENABLE); + if (rc) + goto rtc_rw_fail; if (alarm_enabled) { - ctrl_reg |= regs->alarm_en; - rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg); + rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl, + regs->alarm_en, regs->alarm_en); if (rc) goto rtc_rw_fail; } @@ -275,21 +258,18 @@ static int pm8xxx_rtc_alarm_irq_enable(struct device *dev, unsigned int enable) unsigned long irq_flags; struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; - unsigned int ctrl_reg; u8 value[NUM_8_BIT_RTC_REGS] = {0}; + unsigned int val; spin_lock_irqsave(&rtc_dd->ctrl_reg_lock, irq_flags); - rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg); - if (rc) - goto rtc_rw_fail; - if (enable) - ctrl_reg |= regs->alarm_en; + val = regs->alarm_en; else - ctrl_reg &= ~regs->alarm_en; + val = 0; - rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg); + rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl, + regs->alarm_en, val); if (rc) goto rtc_rw_fail; @@ -318,7 +298,6 @@ static irqreturn_t pm8xxx_alarm_trigger(int irq, void *dev_id) { struct pm8xxx_rtc *rtc_dd = dev_id; const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; - unsigned int ctrl_reg; int rc; rtc_update_irq(rtc_dd->rtc, 1, RTC_IRQF | RTC_AF); @@ -326,15 +305,8 @@ static irqreturn_t pm8xxx_alarm_trigger(int irq, void *dev_id) spin_lock(&rtc_dd->ctrl_reg_lock); /* Clear the alarm enable bit */ - rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl, &ctrl_reg); - if (rc) { - spin_unlock(&rtc_dd->ctrl_reg_lock); - goto rtc_alarm_handled; - } - - ctrl_reg &= ~regs->alarm_en; - - rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl, ctrl_reg); + rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl, + regs->alarm_en, 0); if (rc) { spin_unlock(&rtc_dd->ctrl_reg_lock); goto rtc_alarm_handled; @@ -343,13 +315,11 @@ static irqreturn_t pm8xxx_alarm_trigger(int irq, void *dev_id) spin_unlock(&rtc_dd->ctrl_reg_lock); /* Clear RTC alarm register */ - rc = regmap_read(rtc_dd->regmap, regs->alarm_ctrl2, &ctrl_reg); + rc = regmap_update_bits(rtc_dd->regmap, regs->alarm_ctrl2, + PM8xxx_RTC_ALARM_CLEAR, 0); if (rc) goto rtc_alarm_handled; - ctrl_reg |= PM8xxx_RTC_ALARM_CLEAR; - rc = regmap_write(rtc_dd->regmap, regs->alarm_ctrl2, ctrl_reg); - rtc_alarm_handled: return IRQ_HANDLED; } @@ -357,22 +327,9 @@ static irqreturn_t pm8xxx_alarm_trigger(int irq, void *dev_id) static int pm8xxx_rtc_enable(struct pm8xxx_rtc *rtc_dd) { const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; - unsigned int ctrl_reg; - int rc; - - /* Check if the RTC is on, else turn it on */ - rc = regmap_read(rtc_dd->regmap, regs->ctrl, &ctrl_reg); - if (rc) - return rc; - if (!(ctrl_reg & PM8xxx_RTC_ENABLE)) { - ctrl_reg |= PM8xxx_RTC_ENABLE; - rc = regmap_write(rtc_dd->regmap, regs->ctrl, ctrl_reg); - if (rc) - return rc; - } - - return 0; + return regmap_update_bits(rtc_dd->regmap, regs->ctrl, PM8xxx_RTC_ENABLE, + PM8xxx_RTC_ENABLE); } static const struct pm8xxx_rtc_regs pm8921_regs = {