Re: [PATCH V2 1/7] coresight: replicator: Move ACPI support from AMBA driver to platform driver

Anshuman Khandual
2023-12-04T04:51:47Z

On 12/4/23 09:56, Anshuman Khandual wrote:
>
>
> On 12/1/23 18:05, Sudeep Holla wrote:
>> On Fri, Dec 01, 2023 at 11:50:47AM +0530, Anshuman Khandual wrote:
>>> Add support for the dynamic replicator device in the platform driver, which
>>> can then be used on ACPI based platforms. This change would now allow
>>> runtime power management for repliacator devices on ACPI based systems.
>>>
>>> The driver would try to enable the APB clock if available. Also, rename the
>>> code to reflect the fact that it now handles both static and dynamic
>>> replicators.
>>>
>>> Cc: Lorenzo Pieralisi <lpieralisi@kernel.org>
>>> Cc: Sudeep Holla <sudeep.holla@arm.com>
>>
>> Except the minor nit below which may apply also for few other patches
>> in the series
>>
>> Acked-by: Sudeep Holla <sudeep.holla@arm.com> # For ACPI related changes
>> Tested-by: Sudeep Holla <sudeep.holla@arm.com> # Boot and driver probe only
>>
>> [...]
>>
>>> diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
>>> index b6be73034996..64de0bee02ec 100644
>>> --- a/drivers/hwtracing/coresight/coresight-replicator.c
>>> +++ b/drivers/hwtracing/coresight/coresight-replicator.c
>>> @@ -38,6 +38,7 @@ DEFINE_CORESIGHT_DEVLIST(replicator_devs, "replicator");
>>> struct replicator_drvdata {
>>> void __iomem *base;
>>> struct clk *atclk;
>>> + struct clk *pclk;
>>
>> [minor nit] Perhaps can be documented as well ?
>
> Sure, will add the following comment above the structure.
>
> @pclk: optional clock for the core parts of the replicator.

My bad, this will be the following instead.

diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index 64de0bee02ec..44b9a77ec8aa 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c
@@ -31,6 +31,7 @@ DEFINE_CORESIGHT_DEVLIST(replicator_devs, "replicator");
* @base: memory mapped base address for this component. Also indicates
* whether this one is programmable or not.
* @atclk: optional clock for the core parts of the replicator.
+ * @pclk: APB clock if present, otherwise NULL
* @csdev: component vitals needed by the framework
* @spinlock: serialize enable/disable operations.
* @check_idfilter_val: check if the context is lost upon clock removal.

I will update replicator, tpiu, tmc, and stm devices.

struct catu_drvdata and debug_drvdata do not have the comment section itself.