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: 12509677 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 0B945C433EF for ; Wed, 22 Sep 2021 08:15:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA6066124A for ; Wed, 22 Sep 2021 08:15:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233496AbhIVIQs (ORCPT ); Wed, 22 Sep 2021 04:16:48 -0400 Received: from twspam01.aspeedtech.com ([211.20.114.71]:25256 "EHLO twspam01.aspeedtech.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233438AbhIVIQs (ORCPT ); Wed, 22 Sep 2021 04:16:48 -0400 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 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.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,