From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frank Wunderlich Subject: [PATCH v3 04/10] rtc: mt6397: improvements of rtc driver Date: Mon, 29 Jul 2019 19:41:48 +0200 Message-ID: <20190729174154.4335-5-frank-w@public-files.de> References: <20190729174154.4335-1-frank-w@public-files.de> Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <20190729174154.4335-1-frank-w@public-files.de> Sender: linux-kernel-owner@vger.kernel.org To: Alessandro Zummo , Alexandre Belloni , Allison Randal , "David S. Miller" , devicetree@vger.kernel.org, Eddie Huang , Greg Kroah-Hartman , Jonathan Cameron , Kate Stewart , Lee Jones , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-pm@vger.kernel.org, linux-rtc@vger.kernel.org, Mark Rutland , Matthias Brugger , Mauro Carvalho Chehab , Nicolas Ferre , Richard Fontana Cc: Josef Friedl , Frank Wunderlich List-Id: devicetree@vger.kernel.org From: Josef Friedl - use regmap_read_poll_timeout to drop while-loop - use devm-api to drop remove-callback changes since v2: - fix allocation after irq-request - compatible for mt6323 in separate commit =3D> part 5 Suggested-by: Alexandre Belloni Signed-off-by: Josef Friedl Signed-off-by: Frank Wunderlich =2D-- drivers/rtc/rtc-mt6397.c | 51 +++++++++++++++------------------------- 1 file changed, 19 insertions(+), 32 deletions(-) diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c index c08ee5edf865..9370b7fc9f81 100644 =2D-- a/drivers/rtc/rtc-mt6397.c +++ b/drivers/rtc/rtc-mt6397.c @@ -4,16 +4,19 @@ * Author: Tianping.Fang */ -#include -#include +#include +#include +#include #include +#include +#include #include #include #include +#include static int mtk_rtc_write_trigger(struct mt6397_rtc *rtc) { - unsigned long timeout =3D jiffies + HZ; int ret; u32 data; @@ -21,19 +24,13 @@ static int mtk_rtc_write_trigger(struct mt6397_rtc *rt= c) if (ret < 0) return ret; - while (1) { - ret =3D regmap_read(rtc->regmap, rtc->addr_base + RTC_BBPU, - &data); - if (ret < 0) - break; - if (!(data & RTC_BBPU_CBUSY)) - break; - if (time_after(jiffies, timeout)) { - ret =3D -ETIMEDOUT; - break; - } - cpu_relax(); - } + ret =3D regmap_read_poll_timeout(rtc->regmap, + rtc->addr_base + RTC_BBPU, data, + !(data & RTC_BBPU_CBUSY), + MTK_RTC_POLL_DELAY_US, + MTK_RTC_POLL_TIMEOUT); + if (ret < 0) + dev_err(rtc->dev, "failed to write WRTGE: %d\n", ret); return ret; } @@ -266,19 +263,19 @@ static int mtk_rtc_probe(struct platform_device *pde= v) return rtc->irq; rtc->regmap =3D mt6397_chip->regmap; - rtc->dev =3D &pdev->dev; mutex_init(&rtc->lock); platform_set_drvdata(pdev, rtc); - rtc->rtc_dev =3D devm_rtc_allocate_device(rtc->dev); + rtc->rtc_dev =3D devm_rtc_allocate_device(&pdev->dev); if (IS_ERR(rtc->rtc_dev)) return PTR_ERR(rtc->rtc_dev); - ret =3D request_threaded_irq(rtc->irq, NULL, - mtk_rtc_irq_handler_thread, - IRQF_ONESHOT | IRQF_TRIGGER_HIGH, - "mt6397-rtc", rtc); + ret =3D devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL, + mtk_rtc_irq_handler_thread, + IRQF_ONESHOT | IRQF_TRIGGER_HIGH, + "mt6397-rtc", rtc); + if (ret) { dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n", rtc->irq, ret); @@ -302,15 +299,6 @@ static int mtk_rtc_probe(struct platform_device *pdev= ) return ret; } -static int mtk_rtc_remove(struct platform_device *pdev) -{ - struct mt6397_rtc *rtc =3D platform_get_drvdata(pdev); - - free_irq(rtc->irq, rtc); - - return 0; -} - #ifdef CONFIG_PM_SLEEP static int mt6397_rtc_suspend(struct device *dev) { @@ -349,7 +337,6 @@ static struct platform_driver mtk_rtc_driver =3D { .pm =3D &mt6397_pm_ops, }, .probe =3D mtk_rtc_probe, - .remove =3D mtk_rtc_remove, }; module_platform_driver(mtk_rtc_driver); =2D- 2.17.1