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

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Message-ID: <58882cab-89ce-4554-aee4-24e70d82fc09@arm.com>
Date:   Mon, 4 Dec 2023 09:56:45 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, suzuki.poulose@....com,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Mike Leach <mike.leach@...aro.org>,
        James Clark <james.clark@....com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        coresight@...ts.linaro.org,
        linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH V2 1/7] coresight: replicator: Move ACPI support from AMBA
 driver to platform driver



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@...nel.org>
>> Cc: Sudeep Holla <sudeep.holla@....com>
> 
> Except the minor nit below which may apply also for few other patches
> in the series
> 
> Acked-by: Sudeep Holla <sudeep.holla@....com> # For ACPI related changes
> Tested-by: Sudeep Holla <sudeep.holla@....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.