Re: [U-Boot] [PATCH v2 1/2] core: add uclass_get_device_by_phandle_id() api

24 Feb 2018


      Hi Simon,
On 02/12/2018 10:35 PM, Simon Glass wrote:
...
Hi Kever,
On 8 February 2018 at 19:56, Kever Yang kever.yang@rock-chips.com wrote:
...
Add api for who can not get phandle from a device property.
Can you please add a motivation to the commit message? It is not
obvious to me when this function would be used.
Here is the example why I need this, see the dts node here:
lvds@ff2e0000 {
    ...
    rockchip,grf = <&grf>;
    port {
        port@0 {
            endpoint@0 {
                remote-endpoint = <&vopl_out_lvds>;
            }
        }
    }
}
We can only get 'grf' udevice by uclass_get_device_by_phandle(),
but we not able to get udevice 'vopl_out_lvds', other driver like
rockchip pinctrl
also need to get udevice by a phandle which is not one of direct property of
another device node.
Thanks,
- Kever
...
...
Signed-off-by: Kever Yang kever.yang@rock-chips.com
Changes in v2:

use uint instead of int for phandle
address comment from Philipp

drivers/core/uclass.c | 26 ++++++++++++++++++++++++++
 include/dm/uclass.h   | 16 ++++++++++++++++
 2 files changed, 42 insertions(+)
Regards,
Simon