Re: [PATCH v3 03/16] iio: adc: axp20x_adc: make it possible to probe from DT

Jonathan Cameron
2018-01-21T12:22:58Z

On Mon, 15 Jan 2018 11:33:37 +0100
Quentin Schulz <quentin.schulz@free-electrons.com> wrote:

> To prepare for a future patch that will add a DT node for the ADC, make
> axp20x_adc able to probe from DT and get the per-variant data from
> of_device_id.data since platform_device_id.driver_data won't be set when
> probing by DT.
>
> Leave the ability to probe via platform for driver compatibility with
> old DTs.
>
> Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Looks good to me.

Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to play with it.

If anyone wants to comment I won't be pushing out in a non rebasing form
until at least next weekend.

Thanks,

Jonathan

> ---
> drivers/iio/adc/axp20x_adc.c | 19 ++++++++++++++++++-
> 1 file changed, 18 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/iio/adc/axp20x_adc.c b/drivers/iio/adc/axp20x_adc.c
> index 3fc1b06..3968053 100644
> --- a/drivers/iio/adc/axp20x_adc.c
> +++ b/drivers/iio/adc/axp20x_adc.c
> @@ -515,6 +515,13 @@ static const struct axp_data axp22x_data = {
> .maps = axp22x_maps,
> };
>
> +static const struct of_device_id axp20x_adc_of_match[] = {
> + { .compatible = "x-powers,axp209-adc", .data = (void *)&axp20x_data, },
> + { .compatible = "x-powers,axp221-adc", .data = (void *)&axp22x_data, },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, axp20x_adc_of_match);
> +
> static const struct platform_device_id axp20x_adc_id_match[] = {
> { .name = "axp20x-adc", .driver_data = (kernel_ulong_t)&axp20x_data, },
> { .name = "axp22x-adc", .driver_data = (kernel_ulong_t)&axp22x_data, },
> @@ -543,7 +550,16 @@ static int axp20x_probe(struct platform_device *pdev)
> indio_dev->dev.of_node = pdev->dev.of_node;
> indio_dev->modes = INDIO_DIRECT_MODE;
>
> - info->data = (struct axp_data *)platform_get_device_id(pdev)->driver_data;
> + if (!pdev->dev.of_node) {
> + const struct platform_device_id *id;
> +
> + id = platform_get_device_id(pdev);
> + info->data = (struct axp_data *)id->driver_data;
> + } else {
> + struct device *dev = &pdev->dev;
> +
> + info->data = (struct axp_data *)of_device_get_match_data(dev);
> + }
>
> indio_dev->name = platform_get_device_id(pdev)->name;
> indio_dev->info = info->data->iio_info;
> @@ -606,6 +622,7 @@ static int axp20x_remove(struct platform_device *pdev)
> static struct platform_driver axp20x_adc_driver = {
> .driver = {
> .name = "axp20x-adc",
> + .of_match_table = of_match_ptr(axp20x_adc_of_match),
> },
> .id_table = axp20x_adc_id_match,
> .probe = axp20x_probe,