diff options
Diffstat (limited to 'drivers/iio/adc/vf610_adc.c')
| -rw-r--r-- | drivers/iio/adc/vf610_adc.c | 100 |
1 files changed, 44 insertions, 56 deletions
diff --git a/drivers/iio/adc/vf610_adc.c b/drivers/iio/adc/vf610_adc.c index 4d83c12975c5..513365d42aa5 100644 --- a/drivers/iio/adc/vf610_adc.c +++ b/drivers/iio/adc/vf610_adc.c @@ -173,10 +173,14 @@ struct vf610_adc { /* Ensure the timestamp is naturally aligned */ struct { u16 chan; - s64 timestamp __aligned(8); + aligned_s64 timestamp; } scan; }; +struct vf610_chip_info { + u8 num_channels; +}; + static const u32 vf610_hw_avgs[] = { 1, 4, 8, 16, 32 }; static const u32 vf610_lst_adder[] = { 3, 5, 7, 9, 13, 17, 21, 25 }; @@ -808,14 +812,31 @@ static const struct iio_info vf610_adc_iio_info = { .attrs = &vf610_attribute_group, }; +static const struct vf610_chip_info vf610_chip_info = { + .num_channels = ARRAY_SIZE(vf610_adc_iio_channels), +}; + +static const struct vf610_chip_info imx6sx_chip_info = { + .num_channels = 4, +}; + static const struct of_device_id vf610_adc_match[] = { - { .compatible = "fsl,vf610-adc", }, + { .compatible = "fsl,imx6sx-adc", .data = &imx6sx_chip_info}, + { .compatible = "fsl,vf610-adc", .data = &vf610_chip_info}, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, vf610_adc_match); +static void vf610_adc_action_remove(void *d) +{ + struct vf610_adc *info = d; + + regulator_disable(info->vref); +} + static int vf610_adc_probe(struct platform_device *pdev) { + const struct vf610_chip_info *chip_info; struct device *dev = &pdev->dev; struct vf610_adc *info; struct iio_dev *indio_dev; @@ -823,10 +844,8 @@ 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; @@ -835,6 +854,8 @@ static int vf610_adc_probe(struct platform_device *pdev) if (IS_ERR(info->regs)) return PTR_ERR(info->regs); + chip_info = device_get_match_data(dev); + irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; @@ -842,17 +863,12 @@ 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) + return 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\n"); info->vref = devm_regulator_get(&pdev->dev, "vref"); if (IS_ERR(info->vref)) @@ -862,6 +878,10 @@ static int vf610_adc_probe(struct platform_device *pdev) if (ret) return ret; + ret = devm_add_action_or_reset(&pdev->dev, vf610_adc_action_remove, info); + if (ret) + return ret; + info->vref_uv = regulator_get_voltage(info->vref); device_property_read_u32_array(dev, "fsl,adck-max-frequency", info->max_adck_rate, 3); @@ -877,54 +897,23 @@ static int vf610_adc_probe(struct platform_device *pdev) indio_dev->info = &vf610_adc_iio_info; indio_dev->modes = INDIO_DIRECT_MODE; 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; - } + indio_dev->num_channels = chip_info->num_channels; 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 +961,6 @@ 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, |