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Message-ID: <eeffbdd3-51d3-87cb-dda1-81b99ab51698@starfivetech.com>
Date:   Thu, 24 Nov 2022 17:44:14 +0800
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Subject: Re: [PATCH v1 3/4] soc: starfive: Add StarFive JH71XX pmu driver
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To:     Conor Dooley <conor.dooley@microchip.com>
CC:     Emil Renner Berthing <emil.renner.berthing@canonical.com>,
        <linux-riscv@lists.infradead.org>, <linux-pm@vger.kernel.org>,
        <devicetree@vger.kernel.org>, Rob Herring <robh+dt@kernel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        <linux-kernel@vger.kernel.org>
References: <20221118133216.17037-1-walker.chen@starfivetech.com>
 <20221118133216.17037-4-walker.chen@starfivetech.com>
 <CAJM55Z9jfpOW49Z5cdR18T0w4Ae6CQAYF-AsCD8eOcPczwgoZA@mail.gmail.com>
 <6303c341-a691-fd52-2861-74e9d3ea09c9@starfivetech.com>
 <Y385J2m5YByyAz0g@wendy>
From:   Walker Chen <walker.chen@starfivetech.com>
In-Reply-To: <Y385J2m5YByyAz0g@wendy>
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On 2022/11/24 17:28, Conor Dooley wrote:
> Hey Walker,
> Just jumping in here...
> 
> On Thu, Nov 24, 2022 at 05:08:57PM +0800, Walker Chen wrote:
>> On 2022/11/19 2:31, Emil Renner Berthing wrote:
>> > On Fri, 18 Nov 2022 at 14:35, Walker Chen <walker.chen@starfivetech.com> wrote:
> 
>> >> diff --git a/include/soc/starfive/pm_domains.h b/include/soc/starfive/pm_domains.h
>> >> new file mode 100644
>> >> index 000000000000..a20e28e9baf3
>> >> --- /dev/null
>> >> +++ b/include/soc/starfive/pm_domains.h
>> >> @@ -0,0 +1,15 @@
>> >> +/* SPDX-License-Identifier: GPL-2.0 */
>> >> +/*
>> >> + * Copyright (C) 2022 StarFive Technology Co., Ltd.
>> >> + * Author: Walker Chen <walker.chen@starfivetech.com>
>> >> + */
>> >> +
>> >> +#ifndef __SOC_STARFIVE_PMDOMAINS_H__
>> >> +#define __SOC_STARFIVE_PMDOMAINS_H__
>> >> +
>> >> +#include <linux/types.h>
>> >> +
>> >> +void starfive_pmu_hw_event_turn_on(u32 mask);
>> >> +void starfive_pmu_hw_event_turn_off(u32 mask);
>> >> +
>> >> +#endif /* __SOC_STARFIVE_PMDOMAINS_H__ */
>> > 
>> > The header and functions within are named very generic, but
>> > implemented by the jh71xx-specific driver.
>> > 
>> > Also who should use this header? These functions are never called by
>> > anything in this series.
>> 
>> These two functions will be used by the GPU module. Only the power-off
>> of the GPU is not controlled by the software through PMU module. So
>> here the functions are needed to export.
> 
> ...the general policy is to avoid adding things without users. I think
> they should be kept as static functions for now & when your GPU driver
> is being upstreamed you can expose these functions. That way your usage
> of them can be reviewed with the appropriate context.
> 

OK, thank you for your advice. I will modify the code according to your suggestion
 in the next version of patch.

Best Regards,
Walker Chen