Use devm_* and dev_err_probe() simplify probe function and remove vf610_adc_remove(). Change type of 'vref_uv' to int because regulator_get_voltage() return type is int. Reviewed-by: Haibo Chen <haibo.chen@xxxxxxx> Signed-off-by: Frank Li <Frank.Li@xxxxxxx> --- Change from v2 to v3 - change vref_uv to int from u32 to fix below warning | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202411070633.NIrO7Ert-lkp@xxxxxxxxx/ smatch warnings: drivers/iio/adc/vf610_adc.c:857 vf610_adc_probe() warn: unsigned 'info->vref_uv' is never less than zero. vim +857 drivers/iio/adc/vf610_adc.c Change from v1 to v2 - add Haibo's review tag --- drivers/iio/adc/vf610_adc.c | 79 ++++++++++--------------------------- 1 file changed, 20 insertions(+), 59 deletions(-) diff --git a/drivers/iio/adc/vf610_adc.c b/drivers/iio/adc/vf610_adc.c index 4d83c12975c53..a6a0ada8a102f 100644 --- a/drivers/iio/adc/vf610_adc.c +++ b/drivers/iio/adc/vf610_adc.c @@ -160,7 +160,7 @@ struct vf610_adc { /* lock to protect against multiple access to the device */ struct mutex lock; - u32 vref_uv; + int vref_uv; u32 value; struct regulator *vref; @@ -823,10 +823,8 @@ static int vf610_adc_probe(struct platform_device *pdev) int ret; indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(struct vf610_adc)); - if (!indio_dev) { - dev_err(&pdev->dev, "Failed allocating iio device\n"); - return -ENOMEM; - } + if (!indio_dev) + return dev_err_probe(&pdev->dev, -ENOMEM, "Failed allocating iio device\n"); info = iio_priv(indio_dev); info->dev = &pdev->dev; @@ -842,27 +840,22 @@ static int vf610_adc_probe(struct platform_device *pdev) ret = devm_request_irq(info->dev, irq, vf610_adc_isr, 0, dev_name(&pdev->dev), indio_dev); - if (ret < 0) { - dev_err(&pdev->dev, "failed requesting irq, irq = %d\n", irq); - return ret; - } + if (ret < 0) + dev_err_probe(&pdev->dev, ret, "failed requesting irq, irq = %d\n", irq); - info->clk = devm_clk_get(&pdev->dev, "adc"); - if (IS_ERR(info->clk)) { - dev_err(&pdev->dev, "failed getting clock, err = %ld\n", - PTR_ERR(info->clk)); - return PTR_ERR(info->clk); - } + info->clk = devm_clk_get_enabled(&pdev->dev, "adc"); + if (IS_ERR(info->clk)) + return dev_err_probe(&pdev->dev, PTR_ERR(info->clk), + "failed getting clock, err = %ld\n", + PTR_ERR(info->clk)); info->vref = devm_regulator_get(&pdev->dev, "vref"); if (IS_ERR(info->vref)) return PTR_ERR(info->vref); - ret = regulator_enable(info->vref); - if (ret) - return ret; - - info->vref_uv = regulator_get_voltage(info->vref); + info->vref_uv = devm_regulator_get_enable_read_voltage(&pdev->dev, "vref"); + if (info->vref_uv < 0) + return info->vref_uv; device_property_read_u32_array(dev, "fsl,adck-max-frequency", info->max_adck_rate, 3); @@ -879,52 +872,21 @@ static int vf610_adc_probe(struct platform_device *pdev) indio_dev->channels = vf610_adc_iio_channels; indio_dev->num_channels = ARRAY_SIZE(vf610_adc_iio_channels); - ret = clk_prepare_enable(info->clk); - if (ret) { - dev_err(&pdev->dev, - "Could not prepare or enable the clock.\n"); - goto error_adc_clk_enable; - } - vf610_adc_cfg_init(info); vf610_adc_hw_init(info); - ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, - NULL, &iio_triggered_buffer_setup_ops); - if (ret < 0) { - dev_err(&pdev->dev, "Couldn't initialise the buffer\n"); - goto error_iio_device_register; - } + ret = devm_iio_triggered_buffer_setup(&pdev->dev, indio_dev, &iio_pollfunc_store_time, + NULL, &iio_triggered_buffer_setup_ops); + if (ret < 0) + return dev_err_probe(&pdev->dev, ret, "Couldn't initialise the buffer\n"); mutex_init(&info->lock); - ret = iio_device_register(indio_dev); - if (ret) { - dev_err(&pdev->dev, "Couldn't register the device.\n"); - goto error_adc_buffer_init; - } + ret = devm_iio_device_register(&pdev->dev, indio_dev); + if (ret) + return dev_err_probe(&pdev->dev, ret, "Couldn't register the device.\n"); return 0; - -error_adc_buffer_init: - iio_triggered_buffer_cleanup(indio_dev); -error_iio_device_register: - clk_disable_unprepare(info->clk); -error_adc_clk_enable: - regulator_disable(info->vref); - - return ret; -} - -static void vf610_adc_remove(struct platform_device *pdev) -{ - struct iio_dev *indio_dev = platform_get_drvdata(pdev); - struct vf610_adc *info = iio_priv(indio_dev); - - iio_device_unregister(indio_dev); - iio_triggered_buffer_cleanup(indio_dev); - regulator_disable(info->vref); - clk_disable_unprepare(info->clk); } static int vf610_adc_suspend(struct device *dev) @@ -972,7 +934,6 @@ static DEFINE_SIMPLE_DEV_PM_OPS(vf610_adc_pm_ops, vf610_adc_suspend, static struct platform_driver vf610_adc_driver = { .probe = vf610_adc_probe, - .remove = vf610_adc_remove, .driver = { .name = DRIVER_NAME, .of_match_table = vf610_adc_match, -- 2.34.1
