[U-Boot] [PATCH v3 3/9] dm: uclass: Add uclass_foreach_dev_probe

[Bin Meng <bmeng.cn@gmail.com>]

Hi Patrice,

On Tue, Oct 9, 2018 at 9:41 PM Patrice Chotard <patrice.chotard@st.com> wrote:
>
> Add uclass_foreach_dev_probe() which iterates through
> devices of a given uclass. Devices are probed if necessary
> and are ready to use.
>
> Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
> Reviewed-by: Simon Glass <sjg@chromium.org>
> ---
>
> Changes in v3: None
> Changes in v2: None
>
>  include/dm/uclass.h | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/include/dm/uclass.h b/include/dm/uclass.h
> index 6e7c1cd3e8bc..10ccfdce951e 100644
> --- a/include/dm/uclass.h
> +++ b/include/dm/uclass.h
> @@ -376,4 +376,20 @@ int uclass_resolve_seq(struct udevice *dev);
>  #define uclass_foreach_dev_safe(pos, next, uc) \
>         list_for_each_entry_safe(pos, next, &uc->dev_head, uclass_node)
>
> +/**
> + * uclass_foreach_dev_probe() - Helper function to iteration through devices
> + * of given uclass
> + *
> + * This creates a for() loop which works through the available devices in
> + * a uclass in order from start to end. Devices are probed if necessary,
> + * and ready for use.
> + *
> + * @id: Uclass ID
> + * @dev: struct udevice * to hold the current device. Set to NULL when there
> + * are no more devices.
> + */
> +#define uclass_foreach_dev_probe(id, dev)      \
> +       for (uclass_first_device(id, &dev); dev; \
> +            uclass_next_device(&dev))

Shouldn't we check the return value of uclass_first_device() and
uclass_next_device()?

> +
>  #endif

Regards,
Bin