From patchwork Fri Jul 21 10:23:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: George Stark X-Patchwork-Id: 13321834 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 808F6EB64DC for ; Fri, 21 Jul 2023 10:24:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=s6LkmYkCAN19S0OLaG6f/gw7gcq8ddAS90Uh+RMAZfk=; b=cWJ1aCLUl43TTg 56E/Fb1ACtplpmb6bvUvRmKbYPtPie9EVM6r5uHcLxDanrZw6UOtwoYXxGAdDP+tH+apOht28R9eo haezAYcld82dIwY7mv1euRN5sXIm13enhxa1eQww1qHU9ipDnMkLiEbwjL5PQH16mML8edCWYhmU9 LagjB8jUT+KRpQnYKarhsdIPrchtSeG83+XoNvN9NCdGYLDWKq9XUvVHtCw7eEt2rbGmwAanF3E5Q fcN7uNXd6TJ5v9TYP66u9fUH7kFNbWYQMyuDgp0Khu58Iwg9rKpXqJ/XY5jXi24fOvBCPEsOaZoTz dp5+j8CKI0BVAQpFNiIA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qMnJH-00Dm25-1T; Fri, 21 Jul 2023 10:24:31 +0000 Received: from mx1.sberdevices.ru ([37.18.73.165]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qMnJC-00Dm05-1q; Fri, 21 Jul 2023 10:24:28 +0000 Received: from p-infra-ksmg-sc-msk01 (localhost [127.0.0.1]) by mx1.sberdevices.ru (Postfix) with ESMTP id 4C7E410000A; Fri, 21 Jul 2023 13:24:22 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.sberdevices.ru 4C7E410000A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1689935062; bh=9mw2Wb+AWetG2JTsZ9sUVojagjBQMLaPFTi87H+EDmQ=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=g9mABSiWFjEp8htrmVKmqIBBJ/ZEodPr1wU+43tAX5hTobZWMgKTHXiVT+Q4kX0I/ IXOY0KxObc7ohUjjO4PZMErRIxdmCOoxmxwPvTyfONhUM6SsdGo2gwfCuVDiMIx71q hfyDLomGoSKpK1FIrTDS6FDngM+DVEnKnNajUVm/aZvNSRgiojCzJo2uf5RlAUjxjU QrYZ0uwTgtr1N9dpCJY0K9bfTM7Lgp999YFRUKCjRNLf5OSLs5ToU9rqpmYAD9DUTJ vZ4q+Lizy/ddGwp+H9hL0fIb6rV9kB30d/3cfyLIWiv7nerkH/MZDHnzHVF5cmZG98 Dq9YI5g3QW4xQ== Received: from p-i-exch-sc-m01.sberdevices.ru (p-i-exch-sc-m01.sberdevices.ru [172.16.192.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.sberdevices.ru (Postfix) with ESMTPS; Fri, 21 Jul 2023 13:24:22 +0300 (MSK) Received: from localhost.localdomain (100.64.160.123) by p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.30; Fri, 21 Jul 2023 13:24:21 +0300 From: George Stark To: , , , , , , , , CC: , , , , Subject: [PATCH v2 1/2] iio: adc: meson: fix core clock enable/disable moment Date: Fri, 21 Jul 2023 13:23:08 +0300 Message-ID: <20230721102413.255726-2-gnstark@sberdevices.ru> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230721102413.255726-1-gnstark@sberdevices.ru> References: <20230721102413.255726-1-gnstark@sberdevices.ru> MIME-Version: 1.0 X-Originating-IP: [100.64.160.123] X-ClientProxiedBy: p-i-exch-sc-m02.sberdevices.ru (172.16.192.103) To p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) X-KSMG-Rule-ID: 10 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Lua-Profiles: 178775 [Jul 21 2023] X-KSMG-AntiSpam-Version: 5.9.59.0 X-KSMG-AntiSpam-Envelope-From: GNStark@sberdevices.ru X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Info: LuaCore: 525 525 723604743bfbdb7e16728748c3fa45e9eba05f7d, {Tracking_from_domain_doesnt_match_to}, 100.64.160.123:7.1.2;p-i-exch-sc-m01.sberdevices.ru:5.0.1,7.1.1;127.0.0.199:7.1.2;sberdevices.ru:5.0.1,7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1, FromAlignment: s, {Tracking_white_helo}, ApMailHostAddress: 100.64.160.123 X-MS-Exchange-Organization-SCL: -1 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiPhishing: Clean X-KSMG-LinksScanning: Clean X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.0.1.6960, bases: 2023/07/21 05:36:00 #21651174 X-KSMG-AntiVirus-Status: Clean, skipped X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230721_032426_983227_4B18592D X-CRM114-Status: GOOD ( 17.22 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Enable core clock at probe stage and disable it at remove stage. Core clock is responsible for turning on/off the entire SoC module so it should be on before the first module register is touched and be off at very last moment. Fixes: 3adbf3427330 ("iio: adc: add a driver for the SAR ADC found in Amlogic Meson SoCs") Signed-off-by: George Stark --- drivers/iio/adc/meson_saradc.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c index 2ee12f3ad312..8397a5347f32 100644 --- a/drivers/iio/adc/meson_saradc.c +++ b/drivers/iio/adc/meson_saradc.c @@ -1055,12 +1055,6 @@ static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev) goto err_vref; } - ret = clk_prepare_enable(priv->core_clk); - if (ret) { - dev_err(dev, "failed to enable core clk\n"); - goto err_core_clk; - } - regval = FIELD_PREP(MESON_SAR_ADC_REG0_FIFO_CNT_IRQ_MASK, 1); regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG0, MESON_SAR_ADC_REG0_FIFO_CNT_IRQ_MASK, regval); @@ -1087,8 +1081,6 @@ static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev) regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG3, MESON_SAR_ADC_REG3_ADC_EN, 0); meson_sar_adc_set_bandgap(indio_dev, false); - clk_disable_unprepare(priv->core_clk); -err_core_clk: regulator_disable(priv->vref); err_vref: meson_sar_adc_unlock(indio_dev); @@ -1116,8 +1108,6 @@ static void meson_sar_adc_hw_disable(struct iio_dev *indio_dev) meson_sar_adc_set_bandgap(indio_dev, false); - clk_disable_unprepare(priv->core_clk); - regulator_disable(priv->vref); if (!ret) @@ -1379,7 +1369,7 @@ static int meson_sar_adc_probe(struct platform_device *pdev) if (IS_ERR(priv->clkin)) return dev_err_probe(dev, PTR_ERR(priv->clkin), "failed to get clkin\n"); - priv->core_clk = devm_clk_get(dev, "core"); + priv->core_clk = devm_clk_get_enabled(dev, "core"); if (IS_ERR(priv->core_clk)) return dev_err_probe(dev, PTR_ERR(priv->core_clk), "failed to get core clk\n"); @@ -1462,15 +1452,26 @@ static int meson_sar_adc_remove(struct platform_device *pdev) static int meson_sar_adc_suspend(struct device *dev) { struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct meson_sar_adc_priv *priv = iio_priv(indio_dev); meson_sar_adc_hw_disable(indio_dev); + clk_disable_unprepare(priv->core_clk); + return 0; } static int meson_sar_adc_resume(struct device *dev) { struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct meson_sar_adc_priv *priv = iio_priv(indio_dev); + int ret; + + ret = clk_prepare_enable(priv->core_clk); + if (ret) { + dev_err(dev, "failed to enable core clk\n"); + return ret; + } return meson_sar_adc_hw_enable(indio_dev); } From patchwork Fri Jul 21 10:23:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: George Stark X-Patchwork-Id: 13321836 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 34837C04A6A for ; Fri, 21 Jul 2023 10:25:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ejxMasd1wN7IeMoADIlG+CzxPImN757bne+M3Sb9MXk=; b=UtKTW3nGEi4aug 2eoUzqHmC35XHc/S4hbd0EkXZC/IciiKpB2+yj30LYyc700rgMpkcrBuqhg4E7RiKkIz/nCDFyERY Xhmgpim2inKVuTbxATiRUdxOyglIdaIirIxi3eKqxgcukjvsM9MfITd229F5LxY3BxSGx/h7VeHGt Lw4l1BPkUKnTm5u0Tn2KhgCs67FqxmD7RQdmSjOwkWbZ2tw5IsWC3lrNZWIrUvlKefpGLVybk6zVb ZOCtBVmH+IDwV/mD/MlnBRymrlhP9u1oOGiYb/EkSy8M0OaNHUnXHC5wwJsNkjI2HTk3nHtXctuKL ESqT9w5lWk4haDFs9aWw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qMnJT-00Dm6N-0O; Fri, 21 Jul 2023 10:24:43 +0000 Received: from mx1.sberdevices.ru ([37.18.73.165]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qMnJC-00Dm07-1r; Fri, 21 Jul 2023 10:24:29 +0000 Received: from p-infra-ksmg-sc-msk01 (localhost [127.0.0.1]) by mx1.sberdevices.ru (Postfix) with ESMTP id 710F210000B; Fri, 21 Jul 2023 13:24:22 +0300 (MSK) DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.sberdevices.ru 710F210000B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1689935062; bh=EWUIlxsTDbNkizZTsEpwplf6NYv49AJU87NGu8MEmCk=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:From; b=oajsjVUx8JDqEcZXEXYVq5mcYmbZpxg0SaO/XN0hWUt2aC3QYWZnntz75Vmoit0kK cr6sop1jOhmMFt+rMOh0gI950oYWR+pDKzz+G2MdL/5lWkszX+Fc6pKm6rIlE+24t9 84Yew9SKyD39Vqm2AEk9jOqBXVNDDtCZiDEiNCXPvsKYIcUpkJ8VIxUCMzJOq5Tgag snVql/mpBRCzmNoavl3ZwVJX4vNJ0jlNsFUE57kNYp+G3wHn6YtG8sBgo00PqxGaz/ JBFJzVVzTwdPedYxPHcD2y1dew65ADVpRFk/0Mx4dUBlNUJIRXZ5f5E4pRDQ27Jqtf +NSrdXTWO0fXQ== Received: from p-i-exch-sc-m01.sberdevices.ru (p-i-exch-sc-m01.sberdevices.ru [172.16.192.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.sberdevices.ru (Postfix) with ESMTPS; Fri, 21 Jul 2023 13:24:22 +0300 (MSK) Received: from localhost.localdomain (100.64.160.123) by p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.30; Fri, 21 Jul 2023 13:24:21 +0300 From: George Stark To: , , , , , , , , CC: , , , , Subject: [PATCH v2 2/2] iio: adc: meson: improve error logging at probe stage Date: Fri, 21 Jul 2023 13:23:09 +0300 Message-ID: <20230721102413.255726-3-gnstark@sberdevices.ru> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230721102413.255726-1-gnstark@sberdevices.ru> References: <20230721102413.255726-1-gnstark@sberdevices.ru> MIME-Version: 1.0 X-Originating-IP: [100.64.160.123] X-ClientProxiedBy: p-i-exch-sc-m02.sberdevices.ru (172.16.192.103) To p-i-exch-sc-m01.sberdevices.ru (172.16.192.107) X-KSMG-Rule-ID: 10 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Lua-Profiles: 178775 [Jul 21 2023] X-KSMG-AntiSpam-Version: 5.9.59.0 X-KSMG-AntiSpam-Envelope-From: GNStark@sberdevices.ru X-KSMG-AntiSpam-Rate: 0 X-KSMG-AntiSpam-Status: not_detected X-KSMG-AntiSpam-Method: none X-KSMG-AntiSpam-Auth: dkim=none X-KSMG-AntiSpam-Info: LuaCore: 525 525 723604743bfbdb7e16728748c3fa45e9eba05f7d, {Tracking_from_domain_doesnt_match_to}, 100.64.160.123:7.1.2;p-i-exch-sc-m01.sberdevices.ru:5.0.1,7.1.1;127.0.0.199:7.1.2;sberdevices.ru:5.0.1,7.1.1;d41d8cd98f00b204e9800998ecf8427e.com:7.1.1, FromAlignment: s, {Tracking_white_helo}, ApMailHostAddress: 100.64.160.123 X-MS-Exchange-Organization-SCL: -1 X-KSMG-AntiSpam-Interceptor-Info: scan successful X-KSMG-AntiPhishing: Clean X-KSMG-LinksScanning: Clean X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 2.0.1.6960, bases: 2023/07/21 05:36:00 #21651174 X-KSMG-AntiVirus-Status: Clean, skipped X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230721_032426_986316_6A9E3488 X-CRM114-Status: GOOD ( 13.79 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add log messages for errors that may occur at probe stage Signed-off-by: George Stark --- drivers/iio/adc/meson_saradc.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c index 8397a5347f32..11b10459a028 100644 --- a/drivers/iio/adc/meson_saradc.c +++ b/drivers/iio/adc/meson_saradc.c @@ -1046,8 +1046,10 @@ static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev) u32 regval; ret = meson_sar_adc_lock(indio_dev); - if (ret) + if (ret) { + dev_err(dev, "failed to lock adc\n"); goto err_lock; + } ret = regulator_enable(priv->vref); if (ret < 0) { @@ -1355,15 +1357,15 @@ static int meson_sar_adc_probe(struct platform_device *pdev) priv->regmap = devm_regmap_init_mmio(dev, base, priv->param->regmap_config); if (IS_ERR(priv->regmap)) - return PTR_ERR(priv->regmap); + return dev_err_probe(dev, PTR_ERR(priv->regmap), "failed to init regmap\n"); irq = irq_of_parse_and_map(dev->of_node, 0); if (!irq) - return -EINVAL; + return dev_err_probe(dev, -EINVAL, "failed to get irq\n"); ret = devm_request_irq(dev, irq, meson_sar_adc_irq, IRQF_SHARED, dev_name(dev), indio_dev); if (ret) - return ret; + return dev_err_probe(dev, ret, "failed to request irq\n"); priv->clkin = devm_clk_get(dev, "clkin"); if (IS_ERR(priv->clkin)) @@ -1385,7 +1387,7 @@ static int meson_sar_adc_probe(struct platform_device *pdev) if (!priv->adc_clk) { ret = meson_sar_adc_clk_init(indio_dev, base); if (ret) - return ret; + return dev_err_probe(dev, ret, "failed to init internal clk\n"); } priv->vref = devm_regulator_get(dev, "vref"); @@ -1427,8 +1429,10 @@ static int meson_sar_adc_probe(struct platform_device *pdev) platform_set_drvdata(pdev, indio_dev); ret = iio_device_register(indio_dev); - if (ret) + if (ret) { + dev_err_probe(dev, ret, "failed to register iio device\n"); goto err_hw; + } return 0;