[PATCH v3 09/31] dm: blk: Add a function to return the device type

[Heinrich Schuchardt]

On 1/19/22 02:42, Simon Glass wrote:
> Use the uclass name to get the device type for a block device.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
>
> (no changes since v1)
>
>   drivers/block/blk-uclass.c | 8 ++++++++
>   include/blk.h              | 8 ++++++++
>   2 files changed, 16 insertions(+)
>
> diff --git a/drivers/block/blk-uclass.c b/drivers/block/blk-uclass.c
> index a055387570a..cfc34417a27 100644
> --- a/drivers/block/blk-uclass.c
> +++ b/drivers/block/blk-uclass.c
> @@ -509,6 +509,14 @@ int blk_get_from_parent(struct udevice *parent, struct udevice **devp)
>   	return 0;
>   }
>
> +const char *blk_get_devtype(struct udevice *dev)
> +{
> +	struct udevice *parent = dev_get_parent(dev);
> +
> +	return uclass_get_name(device_get_uclass_id(parent));
> +};
> +
> +
>   int blk_find_max_devnum(enum if_type if_type)
>   {
>   	struct udevice *dev;
> diff --git a/include/blk.h b/include/blk.h
> index 133204a82e1..e88948e4c32 100644
> --- a/include/blk.h
> +++ b/include/blk.h
> @@ -433,6 +433,14 @@ int blk_select_hwpart(struct udevice *dev, int hwpart);
>    */
>   int blk_get_from_parent(struct udevice *parent, struct udevice **devp);
>
> +/**
> + * blk_get_devtype() - Get the device type of a block device
> + *
> + * @dev:	Block device to check
> + * @return device tree, i.e. the uclass name of its parent, e.g. "mmc"

Return:
Cf.
https://www.kernel.org/doc/html/latest/doc-guide/kernel-doc.html#function-documentation

Best regards

Heinrich

> + */
> +const char *blk_get_devtype(struct udevice *dev);
> +
>   /**
>    * blk_get_by_device() - Get the block device descriptor for the given device
>    * @dev:	Instance of a storage device