[U-Boot] [PATCH] drivers: serial: probe all serial devices

[Vabhav Sharma]

> -----Original Message-----
> From: sjg at google.com <sjg at google.com> On Behalf Of Simon Glass
> Sent: Friday, October 19, 2018 8:56 AM
> To: Bin Meng <bmeng.cn at gmail.com>
> Cc: Vabhav Sharma <vabhav.sharma at nxp.com>; U-Boot Mailing List <u-
> boot at lists.denx.de>; u-boot-dm at lists.denx.de; Andreas Dannenberg
> <dannenberg at ti.com>; Masahiro Yamada
> <yamada.masahiro at socionext.com>; Stefan Roese <sr at denx.de>
> Subject: Re: [PATCH] drivers: serial: probe all serial devices
> 
> Hi Bin,
> 
> On 15 October 2018 at 06:28, Bin Meng <bmeng.cn at gmail.com> wrote:
> > On Mon, Oct 15, 2018 at 8:15 PM Vabhav Sharma
> <vabhav.sharma at nxp.com> wrote:
> >>
> >> Serial subsystem search and probe only one first serial device and
> >> unable to use remaining available UART devices
> >>
> >> This patch changes the logic to probe all available serial devices
> >> using platform data or device tree in DM model in order to use all
> >> UART devices
> >>
> >> Signed-off-by: Vabhav Sharma <vabhav.sharma at nxp.com>
> >> ---
> >>  drivers/serial/Kconfig         | 12 ++++++++++++
> >>  drivers/serial/serial-uclass.c | 42
> >> ++++++++++++++++++++++++++++++++++++++++++
> >>  2 files changed, 54 insertions(+)
> >>
> >
> > Looks more and more devices have requirement to be probed during boot.
> > Guess we should handle such in a unified way?
> 
> How about:
> 
> - in dm_init(), after binding, we move on to an auto-probe step
> - a uclass flag indicates that all devices in that uclass must be probed  (that
> will be useful for PCI)
For devices class respective UCLASS to be provided with auto-probe, How many class to be included?
> 
> - a way to tell DM to probe all devices in a particular uclass (e.g. a call to
> dm_set_uclass_autoprobe(enum uclass_id, bool)
>   (that will be useful for this serial case)
Do you mean to verify and send patch for serial uclass with this approach after device_probe in dm_init
> 
> Regards,
> Simon