From patchwork Thu Jan 26 14:20:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Hovold X-Patchwork-Id: 647644 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 B99BBC61DA7 for ; Thu, 26 Jan 2023 14:23:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232002AbjAZOXG (ORCPT ); Thu, 26 Jan 2023 09:23:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231873AbjAZOXC (ORCPT ); Thu, 26 Jan 2023 09:23:02 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3ECB9113E4; 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 dfw.source.kernel.org (Postfix) with ESMTPS id D8F3161856; Thu, 26 Jan 2023 14:22:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3B1D0C433A1; Thu, 26 Jan 2023 14:22:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1674742978; bh=yUxC+lcXB5W9v1WZ5zrNhza/r9HK2s/OODdAQcbHFZU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ejj99tG2bXtibv0Ng9yQlXE9MJdkQmaWaL0uOnpkCg3SwDVglOIoDA5fejqAPS8RJ EGERQvMw0JYJqQD+Ap/SUbxyKdowiunvIXLcPUsQV1b8xZ+Q1fcPyIbiJgOWLg7UJa KUPDx7iNFyeyyb/owSwhQ4KVXsLYQ5X4P45n5yQucekf11FvNiigJguauSOVNUG+I0 +ObVsbJuAHQghSVxwTgJ1mvTQb/FOqPLemd6RMX4jni30rmEJSLRaOX/rm/HF+7Zr5 0ZQP9z5M2Xn39QEVGurUOcCGl+A/kQlUA7VTwVo/CqCedhlHTPuaTZ5qG0142S4WbK dwIXSEvs4Grrw== Received: from johan by xi.lan with local (Exim 4.94.2) (envelope-from ) id 1pL39d-0006im-4E; Thu, 26 Jan 2023 15:23:05 +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 13/24] rtc: pm8xxx: refactor read_time() Date: Thu, 26 Jan 2023 15:20:46 +0100 Message-Id: <20230126142057.25715-14-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: linux-arm-msm@vger.kernel.org In preparation for adding support for setting the time by means of an externally stored offset, refactor read_time() by adding a new helper that can be used to retrieve the raw time as stored in the RTC. Signed-off-by: Johan Hovold --- drivers/rtc/rtc-pm8xxx.c | 54 ++++++++++++++++++++++++---------------- 1 file changed, 33 insertions(+), 21 deletions(-) diff --git a/drivers/rtc/rtc-pm8xxx.c b/drivers/rtc/rtc-pm8xxx.c index b1ce246c501a..2f96a178595c 100644 --- a/drivers/rtc/rtc-pm8xxx.c +++ b/drivers/rtc/rtc-pm8xxx.c @@ -59,6 +59,37 @@ struct pm8xxx_rtc { struct device *dev; }; +static int pm8xxx_rtc_read_raw(struct pm8xxx_rtc *rtc_dd, u32 *secs) +{ + const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; + u8 value[NUM_8_BIT_RTC_REGS]; + unsigned int reg; + int rc; + + rc = regmap_bulk_read(rtc_dd->regmap, regs->read, value, sizeof(value)); + if (rc) + return rc; + + /* + * Read the LSB again and check if there has been a carry over. + * If there has, redo the read operation. + */ + rc = regmap_read(rtc_dd->regmap, regs->read, ®); + if (rc < 0) + return rc; + + if (reg < value[0]) { + rc = regmap_bulk_read(rtc_dd->regmap, regs->read, value, + sizeof(value)); + if (rc) + return rc; + } + + *secs = get_unaligned_le32(value); + + return 0; +} + /* * Steps to write the RTC registers. * 1. Disable alarm if enabled. @@ -129,33 +160,14 @@ static int pm8xxx_rtc_set_time(struct device *dev, struct rtc_time *tm) static int pm8xxx_rtc_read_time(struct device *dev, struct rtc_time *tm) { - int rc; - u8 value[NUM_8_BIT_RTC_REGS]; - unsigned int reg; struct pm8xxx_rtc *rtc_dd = dev_get_drvdata(dev); - const struct pm8xxx_rtc_regs *regs = rtc_dd->regs; u32 secs; + int rc; - rc = regmap_bulk_read(rtc_dd->regmap, regs->read, value, sizeof(value)); + rc = pm8xxx_rtc_read_raw(rtc_dd, &secs); if (rc) return rc; - /* - * Read the LSB again and check if there has been a carry over. - * If there is, redo the read operation. - */ - rc = regmap_read(rtc_dd->regmap, regs->read, ®); - if (rc < 0) - return rc; - - if (unlikely(reg < value[0])) { - rc = regmap_bulk_read(rtc_dd->regmap, regs->read, - value, sizeof(value)); - if (rc) - return rc; - } - - secs = get_unaligned_le32(value); rtc_time64_to_tm(secs, tm); dev_dbg(dev, "read time: %ptRd %ptRt (%u)\n", tm, tm, secs);