[U-Boot] [PATCH v2 2/7] serial: Allow boards to determine whether a serial device is usable

[Alexander Graf]

On 17.01.18 20:39, Simon Glass wrote:
> Hi Alex,
> 
> On 17 January 2018 at 00:54, Alexander Graf <agraf at suse.de> wrote:
>> On some boards, serial devices may or may not be muxed properly to actual
>> pins, depending on firmware configuration. To determine whether we should
>> use a serial device for U-Boot in-/output, we need to check whether it
>> is muxed properly.
>>
>> This is something only the board file can do, so let's expose a weak
>> function that a board can override to explicitly allow or disallow
>> usage of certain serial devices.
>>
>> Signed-off-by: Alexander Graf <agraf at suse.de>
>> ---
>>  drivers/serial/serial-uclass.c | 11 +++++++++++
>>  include/serial.h               | 11 +++++++++++
>>  2 files changed, 22 insertions(+)
>>
> 
> Can we please figure out how handle this in the serial driver / driver
> model itself? I want to avoid weak functions with driver model.

I'm very happy to see suggestions :). The reason I went with the weak
function is really because I couldn't think of anything better.


Alex