linux-kernel - Re: [PATCH v3 -next 0/3] RISC-V: ACPI: Add LPI support

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Message-ID: <Zc2U70o7teYnJyp9@sunil-laptop>
Date: Thu, 15 Feb 2024 10:07:03 +0530
From: Sunil V L <sunilvl@...tanamicro.com>
To: linux-pm@...r.kernel.org, linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Cc: "Rafael J . Wysocki" <rafael@...nel.org>, Pavel Machek <pavel@....cz>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Len Brown <lenb@...nel.org>,
	Anup Patel <anup@...infault.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Andrew Jones <ajones@...tanamicro.com>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Atish Kumar Patra <atishp@...osinc.com>
Subject: Re: [PATCH v3 -next 0/3] RISC-V: ACPI: Add LPI support

Hi Rafel,

On Thu, Jan 18, 2024 at 11:59:27AM +0530, Sunil V L wrote:
> This series adds support for Low Power Idle (LPI) on ACPI based
> platforms. 
> 
> LPI 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#lpi-low-power-idle-states 
> [2] - https://github.com/riscv-non-isa/riscv-acpi-ffh/releases/download/v/riscv-ffh.pdf
> 
Could you please take a look at this series also and provide ACK if
looks fine?

Thanks,
Sunil
> Changes since v2:
> 	1) Added "riscv_" prefix for functions made non static (Feedback from Drew)
> 	2) Added RB tags from Drew.
> 	
> Changes since v1:
> 	1) Reordered the commits such that the patch which enables
> 	   ACPI_PROCESSOR is the last one in the series.
> 	2) Used GENMASK and other changes to address Drew's comments.
> 	3) Moved common functions required by both DT and ACPI based cpuidle
> 	   drivers from the DT driver to common arch/riscv/suspend.c.
> 	4) ACPI cpuidle driver is added under drivers/acpi/riscv
> 	5) Rebased to latest for-next branch of linux-riscv.
> 
> 
> Sunil V L (3):
>   cpuidle: RISC-V: Move few functions to arch/riscv
>   ACPI: RISC-V: Add LPI driver
>   ACPI: Enable ACPI_PROCESSOR for RISC-V
> 
>  arch/riscv/include/asm/suspend.h    |  3 ++
>  arch/riscv/kernel/suspend.c         | 49 +++++++++++++++++
>  drivers/acpi/Kconfig                |  2 +-
>  drivers/acpi/riscv/Makefile         |  3 +-
>  drivers/acpi/riscv/cpuidle.c        | 81 +++++++++++++++++++++++++++++
>  drivers/cpuidle/cpuidle-riscv-sbi.c | 49 ++---------------
>  6 files changed, 141 insertions(+), 46 deletions(-)
>  create mode 100644 drivers/acpi/riscv/cpuidle.c
> 
> -- 
> 2.34.1
>