From patchwork Wed Sep 22 08:15:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Billy Tsai X-Patchwork-Id: 12510223 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 08E02C433F5 for ; Wed, 22 Sep 2021 10:53:34 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id C1FDB61090 for ; Wed, 22 Sep 2021 10:53:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C1FDB61090 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=aspeedtech.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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=gu+gvc2CW6AQPZR8JJOiS0do/DZo23/iPdugAVVO6Hk=; b=2/krvLORPkCQWM rtQ4qHTMcWJib0ThWeNZ08Nx1hQ2v3Zuu4zra9wKZzOSkQSygoIHxP35e2Hd3lhRilftAt/oZp2Md 8zjT7QFPs5tX20xIEfYWSRdzwT6w8qf1JmaF9eBcZ9yCZVEJB1k0oTgQSPa5wbkwbGxpOgvM6B9rr b6w2bCKKnPfCU9QsfA45N183EWXEAR3wueKYV+nnXUHTCbJoPlaZhwvZFNTzj0SQFE/8qDoyCm5vj A+EgL8vCF6A3JuW4vkQ+kDvU4u8C9Y8fMNVpBgjqez+sXjMfFncJ7CPgxElp6zgyDTS6OQSIaq2Jo 5M9r2M9UaqHGumggvUrA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mSzph-0087GU-Hf; Wed, 22 Sep 2021 10:50:33 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mSzat-007qfc-DM for linux-arm-kernel@bombadil.infradead.org; Wed, 22 Sep 2021 10:35:15 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:Content-Transfer-Encoding :MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From: Sender:Reply-To:Content-ID:Content-Description; bh=hBaeDctXU9ogaUn6A86Drmrk14jOGwsD9+/GZ0bgVNk=; b=V2rkFSomdpM7UOqgtknBS1vlIn UyxDJgi0klQvKQax0dczGNR2hVIsAd47vMk11ekCz93ZCpB8APIy88B3nd56O4SEmnIGDJVTgtR6e SMeQJOpNC6eMRx+POn0apnv82PtIy2FjJh/WeuP3O5m4AYYt41lY/cPbEGZs423q3pWGUjHV+dulL DX0yKb9N8N98hs3AAQx0CTXqVp082xvcEWb8nIEbNRGCVANQjqCVtIguPsFHrminK3L0PqF0w3mXG tgPIV/fmVYTtgB/0Cq5Df8I0ms+zjZi5vNodAv+oApMEE3dM7GobRXXeVtaAfTeflzAvNvyOUIfvo x8+eYIZQ==; Received: from twspam01.aspeedtech.com ([211.20.114.71]) by desiato.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mSxPg-004x7e-Fx for linux-arm-kernel@lists.infradead.org; Wed, 22 Sep 2021 08:15:34 +0000 Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 18M7sc8c099785; Wed, 22 Sep 2021 15:54:38 +0800 (GMT-8) (envelope-from billy_tsai@aspeedtech.com) Received: from BillyTsai-pc.aspeed.com (192.168.2.149) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 22 Sep 2021 16:14:56 +0800 From: Billy Tsai To: , , , , , , , , , , , , , CC: Subject: [v7 05/11] iio: adc: aspeed: Use devm_add_action_or_reset. Date: Wed, 22 Sep 2021 16:15:14 +0800 Message-ID: <20210922081520.30580-6-billy_tsai@aspeedtech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210922081520.30580-1-billy_tsai@aspeedtech.com> References: <20210922081520.30580-1-billy_tsai@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.2.149] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 18M7sc8c099785 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210922_091533_058449_CCBA349D X-CRM114-Status: GOOD ( 16.50 ) 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 This patch use devm_add_action_or_reset to handle the error in probe phase. Signed-off-by: Billy Tsai --- drivers/iio/adc/aspeed_adc.c | 113 +++++++++++++++++------------------ 1 file changed, 55 insertions(+), 58 deletions(-) diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c index e53d1541ad1d..0a18893c47f0 100644 --- a/drivers/iio/adc/aspeed_adc.c +++ b/drivers/iio/adc/aspeed_adc.c @@ -195,6 +195,28 @@ static const struct iio_info aspeed_adc_iio_info = { .debugfs_reg_access = aspeed_adc_reg_access, }; +static void aspeed_adc_reset_assert(void *data) +{ + struct reset_control *rst = data; + + reset_control_assert(rst); +} + +static void aspeed_adc_clk_disable_unprepare(void *data) +{ + struct clk *clk = data; + + clk_disable_unprepare(clk); +} + +static void aspeed_adc_power_down(void *data) +{ + struct aspeed_adc_data *priv_data = data; + + writel(FIELD_PREP(ASPEED_ADC_OP_MODE, ASPEED_ADC_OP_MODE_PWR_DOWN), + priv_data->base + ASPEED_REG_ENGINE_CONTROL); +} + static int aspeed_adc_vref_config(struct iio_dev *indio_dev) { struct aspeed_adc_data *data = iio_priv(indio_dev); @@ -236,7 +258,7 @@ static int aspeed_adc_probe(struct platform_device *pdev) if (data->model_data->need_prescaler) { snprintf(clk_name, ARRAY_SIZE(clk_name), "%s-prescaler", data->model_data->model_name); - data->clk_prescaler = clk_hw_register_divider( + data->clk_prescaler = devm_clk_hw_register_divider( &pdev->dev, clk_name, clk_parent_name, 0, data->base + ASPEED_REG_CLOCK_CONTROL, 17, 15, 0, &data->clk_lock); @@ -252,35 +274,41 @@ static int aspeed_adc_probe(struct platform_device *pdev) */ snprintf(clk_name, ARRAY_SIZE(clk_name), "%s-scaler", data->model_data->model_name); - data->clk_scaler = clk_hw_register_divider( + data->clk_scaler = devm_clk_hw_register_divider( &pdev->dev, clk_name, clk_parent_name, scaler_flags, data->base + ASPEED_REG_CLOCK_CONTROL, 0, data->model_data->scaler_bit_width, 0, &data->clk_lock); - if (IS_ERR(data->clk_scaler)) { - ret = PTR_ERR(data->clk_scaler); - goto scaler_error; - } + if (IS_ERR(data->clk_scaler)) + return PTR_ERR(data->clk_scaler); data->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL); if (IS_ERR(data->rst)) { dev_err(&pdev->dev, "invalid or missing reset controller device tree entry"); - ret = PTR_ERR(data->rst); - goto reset_error; + return PTR_ERR(data->rst); } reset_control_deassert(data->rst); + ret = devm_add_action_or_reset(data->dev, aspeed_adc_reset_assert, + data->rst); + if (ret) + return ret; + ret = aspeed_adc_vref_config(indio_dev); if (ret) - goto vref_config_error; + return ret; - if (data->model_data->wait_init_sequence) { - /* Enable engine in normal mode. */ - writel(FIELD_PREP(ASPEED_ADC_OP_MODE, - ASPEED_ADC_OP_MODE_NORMAL) | - ASPEED_ADC_ENGINE_ENABLE, - data->base + ASPEED_REG_ENGINE_CONTROL); + /* Enable engine in normal mode. */ + writel(FIELD_PREP(ASPEED_ADC_OP_MODE, ASPEED_ADC_OP_MODE_NORMAL) | + ASPEED_ADC_ENGINE_ENABLE, + data->base + ASPEED_REG_ENGINE_CONTROL); + + ret = devm_add_action_or_reset(data->dev, aspeed_adc_power_down, + data); + if (ret) + return ret; + if (data->model_data->wait_init_sequence) { /* Wait for initial sequence complete. */ ret = readl_poll_timeout(data->base + ASPEED_REG_ENGINE_CONTROL, adc_engine_control_reg_val, @@ -289,18 +317,23 @@ static int aspeed_adc_probe(struct platform_device *pdev) ASPEED_ADC_INIT_POLLING_TIME, ASPEED_ADC_INIT_TIMEOUT); if (ret) - goto poll_timeout_error; + return ret; } - /* Start all channels in normal mode. */ ret = clk_prepare_enable(data->clk_scaler->clk); if (ret) - goto clk_enable_error; + return ret; + ret = devm_add_action_or_reset(data->dev, + aspeed_adc_clk_disable_unprepare, + data->clk_scaler->clk); + if (ret) + return ret; + + /* Start all channels in normal mode. */ adc_engine_control_reg_val = - ASPEED_ADC_CTRL_CHANNEL | - FIELD_PREP(ASPEED_ADC_OP_MODE, ASPEED_ADC_OP_MODE_NORMAL) | - ASPEED_ADC_ENGINE_ENABLE; + readl(data->base + ASPEED_REG_ENGINE_CONTROL); + adc_engine_control_reg_val |= ASPEED_ADC_CTRL_CHANNEL; writel(adc_engine_control_reg_val, data->base + ASPEED_REG_ENGINE_CONTROL); @@ -310,45 +343,10 @@ static int aspeed_adc_probe(struct platform_device *pdev) indio_dev->channels = aspeed_adc_iio_channels; indio_dev->num_channels = data->model_data->num_channels; - ret = iio_device_register(indio_dev); - if (ret) - goto iio_register_error; - - return 0; - -iio_register_error: - writel(FIELD_PREP(ASPEED_ADC_OP_MODE, ASPEED_ADC_OP_MODE_PWR_DOWN), - data->base + ASPEED_REG_ENGINE_CONTROL); - clk_disable_unprepare(data->clk_scaler->clk); -clk_enable_error: -poll_timeout_error: -vref_config_error: - reset_control_assert(data->rst); -reset_error: - clk_hw_unregister_divider(data->clk_scaler); -scaler_error: - if (data->model_data->need_prescaler) - clk_hw_unregister_divider(data->clk_prescaler); + ret = devm_iio_device_register(data->dev, indio_dev); return ret; } -static int aspeed_adc_remove(struct platform_device *pdev) -{ - struct iio_dev *indio_dev = platform_get_drvdata(pdev); - struct aspeed_adc_data *data = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - writel(FIELD_PREP(ASPEED_ADC_OP_MODE, ASPEED_ADC_OP_MODE_PWR_DOWN), - data->base + ASPEED_REG_ENGINE_CONTROL); - clk_disable_unprepare(data->clk_scaler->clk); - reset_control_assert(data->rst); - clk_hw_unregister_divider(data->clk_scaler); - if (data->model_data->need_prescaler) - clk_hw_unregister_divider(data->clk_prescaler); - - return 0; -} - static const struct aspeed_adc_model_data ast2400_model_data = { .model_name = "ast2400-adc", .vref_fixed_mv = 2500, @@ -379,7 +377,6 @@ MODULE_DEVICE_TABLE(of, aspeed_adc_matches); static struct platform_driver aspeed_adc_driver = { .probe = aspeed_adc_probe, - .remove = aspeed_adc_remove, .driver = { .name = KBUILD_MODNAME, .of_match_table = aspeed_adc_matches,