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x86_64-pc-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230825_055001_456338_065AACE3 X-CRM114-Status: GOOD ( 22.57 ) 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: , Cc: robh@kernel.org, alexandre.belloni@bootlin.com, lars@metafoo.de, heiko@sntech.de, Michael.Hennerich@analog.com, linux-iio@vger.kernel.org, claudiu.beznea@tuxon.dev, linux-mediatek@lists.infradead.org, yangyingliang@huawei.com, matthias.bgg@gmail.com, linux-arm-kernel@lists.infradead.org, angelogioacchino.delregno@collabora.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, 25 Aug 2023 18:57:43 +0800 Jinjie Ruan wrote: > The devm_clk_get_enabled() helper: > - calls devm_clk_get() > - calls clk_prepare_enable() and registers what is needed in order to > call clk_disable_unprepare() when needed, as a managed resource. > > This simplifies the code. > > Signed-off-by: Jinjie Ruan This looks good, but should ideally be proceeded by a separate patch moving to devm_request_irq() as then the exit paths will become much simpler and you can also move to return dev_err_probe() save a few pointless lines of code and give the benefit of debug info for deferred return codes. > --- > drivers/iio/adc/at91_adc.c | 38 ++++++++++---------------------------- > 1 file changed, 10 insertions(+), 28 deletions(-) > > diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c > index de6650f9c4b1..318e33ce22fb 100644 > --- a/drivers/iio/adc/at91_adc.c > +++ b/drivers/iio/adc/at91_adc.c > @@ -1087,32 +1087,20 @@ static int at91_adc_probe(struct platform_device *pdev) > return ret; > } > > - st->clk = devm_clk_get(&pdev->dev, "adc_clk"); > + st->clk = devm_clk_get_enabled(&pdev->dev, "adc_clk"); > if (IS_ERR(st->clk)) { > - dev_err(&pdev->dev, "Failed to get the clock.\n"); > - ret = PTR_ERR(st->clk); > - goto error_free_irq; > - } > - > - ret = clk_prepare_enable(st->clk); > - if (ret) { > dev_err(&pdev->dev, > "Could not prepare or enable the clock.\n"); > + ret = PTR_ERR(st->clk); > goto error_free_irq; > } > > - st->adc_clk = devm_clk_get(&pdev->dev, "adc_op_clk"); > + st->adc_clk = devm_clk_get_enabled(&pdev->dev, "adc_op_clk"); > if (IS_ERR(st->adc_clk)) { > - dev_err(&pdev->dev, "Failed to get the ADC clock.\n"); > - ret = PTR_ERR(st->adc_clk); > - goto error_disable_clk; > - } > - > - ret = clk_prepare_enable(st->adc_clk); > - if (ret) { > dev_err(&pdev->dev, > "Could not prepare or enable the ADC clock.\n"); > - goto error_disable_clk; > + ret = PTR_ERR(st->adc_clk); > + goto error_free_irq; > } > > /* > @@ -1132,7 +1120,7 @@ static int at91_adc_probe(struct platform_device *pdev) > if (!st->startup_time) { > dev_err(&pdev->dev, "No startup time available.\n"); > ret = -EINVAL; > - goto error_disable_adc_clk; > + goto error_free_irq; > } > ticks = (*st->caps->calc_startup_ticks)(st->startup_time, adc_clk_khz); > > @@ -1160,7 +1148,7 @@ static int at91_adc_probe(struct platform_device *pdev) > ret = at91_adc_channel_init(idev); > if (ret < 0) { > dev_err(&pdev->dev, "Couldn't initialize the channels.\n"); > - goto error_disable_adc_clk; > + goto error_free_irq; > } > > init_waitqueue_head(&st->wq_data_avail); > @@ -1175,19 +1163,19 @@ static int at91_adc_probe(struct platform_device *pdev) > ret = at91_adc_buffer_init(idev); > if (ret < 0) { > dev_err(&pdev->dev, "Couldn't initialize the buffer.\n"); > - goto error_disable_adc_clk; > + goto error_free_irq; > } > > ret = at91_adc_trigger_init(idev); > if (ret < 0) { > dev_err(&pdev->dev, "Couldn't setup the triggers.\n"); > at91_adc_buffer_remove(idev); > - goto error_disable_adc_clk; > + goto error_free_irq; > } > } else { > ret = at91_ts_register(idev, pdev); > if (ret) > - goto error_disable_adc_clk; > + goto error_free_irq; > > at91_ts_hw_init(idev, adc_clk_khz); > } > @@ -1207,10 +1195,6 @@ static int at91_adc_probe(struct platform_device *pdev) > } else { > at91_ts_unregister(st); > } > -error_disable_adc_clk: > - clk_disable_unprepare(st->adc_clk); > -error_disable_clk: > - clk_disable_unprepare(st->clk); > error_free_irq: > free_irq(st->irq, idev); > return ret; > @@ -1228,8 +1212,6 @@ static int at91_adc_remove(struct platform_device *pdev) > } else { > at91_ts_unregister(st); > } > - clk_disable_unprepare(st->adc_clk); > - clk_disable_unprepare(st->clk); > free_irq(st->irq, idev); > > return 0; _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel