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SubjectRe: [RESEND PATCH v3 2/2] serial: uartps: Change uart ID port allocation
Hi Geert,

On 24.9.2018 09:37, Geert Uytterhoeven wrote:
> Hi Michal,
> On Thu, Sep 20, 2018 at 1:42 PM Michal Simek <> wrote:
>> For IPs which have alias algorightm all the time using that alias and
>> minor number. It means serial20 alias ends up as ttyPS20.
>> If alias is not setup for probed IP instance the first unused position is
>> used but that needs to be checked if it is really empty because another
>> instance doesn't need to be probed at that time. of_alias_get_alias_list()
>> fills alias bitmap which exactly shows which ID is free.
>> If alias pointing to different not compatible IP, it is free to use.
>> cdns_get_id() call is placed below structure allocation to simplify
>> error path.
>> Signed-off-by: Michal Simek <>
> JFTR, for sh-sci, I used a different approach, as all ports in the static DTB
> can have an alias (if aliases are needed at all), and only DT overlays cannot
> have them. Cfr. commit 7678f4c20fa7670f ("serial: sh-sci: Add support for
> dynamic instances").

if you look at all patches I have done for uartps you can find out that
I am creating uart_driver for every instance separately.
It means that there is still a limit for number of consoles exactly as
yours CONFIG_SERIAL_SH_SCI_NR_UARTS but every instance is separated.


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