Re: [PATCH 0/5] Exynos850 APM-to-AP mailbox support

Alexey Klimov
2026-04-02T02:19:42Z

On Sat Mar 21, 2026 at 10:44 AM GMT, Krzysztof Kozlowski wrote:
> On Fri, Mar 20, 2026 at 09:15:12PM +0000, Alexey Klimov wrote:
>> Hi all,
>>
>> This patch series introduces support for the APM-to-AP mailbox on the
>> Exynos850 SoC. This mailbox is required for communicating with the APM
>> co-processor using ACPM.
>>
>> The Exynos850 mailbox operates similarly to the existing gs101
>> implementation, but the register offsets and IRQ mask bits differ.
>> This series abstracts these differences into platform-specific data
>> structures matched via the device tree.
>>
>> Also, it requires APM-to-AP mailbox clock in CMU_APM block.
>>
>> In theory this can be split into two series with correct dependecies:
>> device tree node requires clock changes to be merged. The suggestion
>> is to let this go through Samsung SoC tree with corresponding acks
>> if it is okay.
>
> I don't understand why this cannot be split into two seris
> *practically*. What is exactly the dependency between mailbox and DTS,
> that it had to be combined here?

Do you suggest to send 3 single patches with proper dependencies
description? DT bindings change first, then mailbox change that specifically
depends on dt-bindings change and then dts update (which will depend on both)?

I thought that mbox driver change depends implicitly on bindings update?

Best regards,
Alexey