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Tue, 14 Jul 2026 19:19:35 -0700 (PDT) From: Rosen Penev To: linux-rtc@vger.kernel.org Cc: Alexandre Belloni , Maxime Coquelin , Alexandre Torgue , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , linux-stm32@st-md-mailman.stormreply.com (moderated list:ARM/STM32 ARCHITECTURE), linux-arm-kernel@lists.infradead.org (moderated list:ARM/STM32 ARCHITECTURE), linux-kernel@vger.kernel.org (open list), llvm@lists.linux.dev (open list:CLANG/LLVM BUILD SUPPORT:Keyword:\b(?i:clang|llvm)\b) Subject: [PATCH] rtc: stmp3xxx: use devm_platform_ioremap_resource() Date: Tue, 14 Jul 2026 19:19:33 -0700 Message-ID: <20260715021933.1551663-1-rosenp@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Replace the open-coded platform_get_resource() plus devm_ioremap() sequence with a single devm_platform_ioremap_resource() call, which folds the resource lookup and mapping into one step and returns an ERR_PTR on failure, checked with IS_ERR() and propagated via PTR_ERR(). Move the mapping ahead of the devm_kzalloc() so that an error or deferred probe is handled before the rtc_data allocation, avoiding needless work. The fsl,stmp3xxx-rtc nodes in imx23.dtsi (reg = <0x8005c000 0x2000>) and imx28.dtsi (reg = <0x80056000 0x2000>) each provide a single non-overlapping IORESOURCE_MEM window, so the region reservation now performed by devm_platform_ioremap_resource() introduces no conflict. Built for ARM (mxs_defconfig + CONFIG_RTC_DRV_STMP) with LLVM=1; drivers/rtc/rtc-stmp3xxx.o compiles cleanly. Assisted-by: opencode:hy3-free Signed-off-by: Rosen Penev --- drivers/rtc/rtc-stmp3xxx.c | 19 ++++++------------- 1 file changed, 6 insertions(+), 13 deletions(-) diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c index 7afcd14aeee5..05f128ccf827 100644 --- a/drivers/rtc/rtc-stmp3xxx.c +++ b/drivers/rtc/rtc-stmp3xxx.c @@ -245,28 +245,21 @@ static void stmp3xxx_rtc_remove(struct platform_device *pdev) static int stmp3xxx_rtc_probe(struct platform_device *pdev) { struct stmp3xxx_rtc_data *rtc_data; - struct resource *r; + void __iomem *io; u32 rtc_stat; u32 pers0_set, pers0_clr; u32 crystalfreq = 0; int err; + io = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(io)) + return PTR_ERR(io); + rtc_data = devm_kzalloc(&pdev->dev, sizeof(*rtc_data), GFP_KERNEL); if (!rtc_data) return -ENOMEM; - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!r) { - dev_err(&pdev->dev, "failed to get resource\n"); - return -ENXIO; - } - - rtc_data->io = devm_ioremap(&pdev->dev, r->start, resource_size(r)); - if (!rtc_data->io) { - dev_err(&pdev->dev, "ioremap failed\n"); - return -EIO; - } - + rtc_data->io = io; rtc_data->irq_alarm = platform_get_irq(pdev, 0); rtc_stat = readl(rtc_data->io + STMP3XXX_RTC_STAT); -- 2.55.0