linux-kernel - Re: [PATCH v1 -next 0/3] RISC-V: ACPI: Enable CPPC based cpufreq support

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Date: Thu, 15 Feb 2024 11:27:19 +0000
From: Sudeep Holla <sudeep.holla@....com>
To: Sunil V L <sunilvl@...tanamicro.com>, linux-riscv@...ts.infradead.org,
	Pierre Gondois <pierre.gondois@....com>
Cc: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Anup Patel <apatel@...tanamicro.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Atish Kumar Patra <atishp@...osinc.com>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Andrew Jones <ajones@...tanamicro.com>, Len Brown <lenb@...nel.org>
Subject: Re: [PATCH v1 -next 0/3] RISC-V: ACPI: Enable CPPC based cpufreq
 support

On Fri, Feb 09, 2024 at 12:11:11PM +0100, Pierre Gondois wrote:
> The code looks good to me, so FWIW:
> Reviewed-by: Pierre Gondois <pierre.gondois@....com>
> 
> +Sudeep as this touches cppc/arm in case he didn't see the patches
>

Thanks!

> On 2/8/24 04:44, Sunil V L wrote:
> > This series enables the support for "Collaborative Processor Performance
> > Control (CPPC) on ACPI based RISC-V platforms. It depends on the
> > encoding of CPPC registers as defined in RISC-V FFH spec [2].
> > 
> > CPPC is described in the ACPI spec [1]. RISC-V FFH spec required to
> > enable this, is available at [2].
> > 
> > [1] - https://uefi.org/specs/ACPI/6.5/08_Processor_Configuration_and_Control.html#collaborative-processor-performance-control
> > [2] - https://github.com/riscv-non-isa/riscv-acpi-ffh/releases/download/v1.0.0/riscv-ffh.pdf
> > 
> > The series is based on the LPI support series.
> > Based-on: 20240118062930.245937-1-sunilvl@...tanamicro.com
> > (https://lore.kernel.org/lkml/20240118062930.245937-1-sunilvl@ventanamicro.com/)
> > 
> > Sunil V L (3):
> >    ACPI: RISC-V: Add CPPC driver
> >    cpufreq: Move CPPC configs to common Kconfig and add RISC-V
> >    RISC-V: defconfig: Enable CONFIG_ACPI_CPPC_CPUFREQ
> >

Looks good to me.

Acked-by: Sudeep Holla <sudeep.holla@....com>

--
Regards,
Sudeep