linux-kernel - Re: [PATCH v3 1/3] loongarch: export some arch-specific pm interfaces

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Message-ID: <CAAhV-H5XxxGd_+NMRJKUCtk24dBQF0Fzdsg_5mZEWh1hs_u0qg@mail.gmail.com>
Date:   Fri, 16 Jun 2023 12:04:05 +0800
From:   Huacai Chen <chenhuacai@...nel.org>
To:     Yinbo Zhu <zhuyinbo@...ngson.cn>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        WANG Xuerui <kernel@...0n.name>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Pavel Machek <pavel@....cz>, Marc Zyngier <maz@...nel.org>,
        Arnd Bergmann <arnd@...db.de>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        loongarch@...ts.linux.dev, Jianmin Lv <lvjianmin@...ngson.cn>,
        wanghongliang@...ngson.cn, Liu Peibao <liupeibao@...ngson.cn>,
        loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH v3 1/3] loongarch: export some arch-specific pm interfaces

Hi, Yinbo,

I think this patch should go through the loongarch tree and the others
to go through the soc tree, so I just applied this one. The next
version you can only send the other two, thanks.

Huacai

On Thu, Jun 15, 2023 at 5:18 PM Yinbo Zhu <zhuyinbo@...ngson.cn> wrote:
>
> Some power management controllers need to support DTS and will use
> the suspend interface thus this patch was to export such interface
> for their use.
>
> Signed-off-by: Yinbo Zhu <zhuyinbo@...ngson.cn>
> ---
>  arch/loongarch/include/asm/acpi.h    |  3 +--
>  arch/loongarch/include/asm/suspend.h | 10 ++++++++++
>  arch/loongarch/power/suspend.c       |  8 ++++----
>  3 files changed, 15 insertions(+), 6 deletions(-)
>  create mode 100644 arch/loongarch/include/asm/suspend.h
>
> diff --git a/arch/loongarch/include/asm/acpi.h b/arch/loongarch/include/asm/acpi.h
> index 976a810352c6..1d7810798c08 100644
> --- a/arch/loongarch/include/asm/acpi.h
> +++ b/arch/loongarch/include/asm/acpi.h
> @@ -8,6 +8,7 @@
>  #ifndef _ASM_LOONGARCH_ACPI_H
>  #define _ASM_LOONGARCH_ACPI_H
>
> +#include <asm/suspend.h>
>  #ifdef CONFIG_ACPI
>  extern int acpi_strict;
>  extern int acpi_disabled;
> @@ -37,12 +38,10 @@ extern struct list_head acpi_wakeup_device_list;
>
>  extern int loongarch_acpi_suspend(void);
>  extern int (*acpi_suspend_lowlevel)(void);
> -extern void loongarch_suspend_enter(void);
>
>  static inline unsigned long acpi_get_wakeup_address(void)
>  {
>  #ifdef CONFIG_SUSPEND
> -       extern void loongarch_wakeup_start(void);
>         return (unsigned long)loongarch_wakeup_start;
>  #endif
>         return 0UL;
> diff --git a/arch/loongarch/include/asm/suspend.h b/arch/loongarch/include/asm/suspend.h
> new file mode 100644
> index 000000000000..fc64089fefaa
> --- /dev/null
> +++ b/arch/loongarch/include/asm/suspend.h
> @@ -0,0 +1,10 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef __ASM_SUSPEND_H
> +#define __ASM_SUSPEND_H
> +
> +void loongarch_common_resume(void);
> +void loongarch_common_suspend(void);
> +void loongarch_suspend_enter(void);
> +void loongarch_wakeup_start(void);
> +
> +#endif
> diff --git a/arch/loongarch/power/suspend.c b/arch/loongarch/power/suspend.c
> index 5e19733e5e05..166d9e06a64b 100644
> --- a/arch/loongarch/power/suspend.c
> +++ b/arch/loongarch/power/suspend.c
> @@ -27,7 +27,7 @@ struct saved_registers {
>  };
>  static struct saved_registers saved_regs;
>
> -static void arch_common_suspend(void)
> +void loongarch_common_suspend(void)
>  {
>         save_counter();
>         saved_regs.pgd = csr_read64(LOONGARCH_CSR_PGDL);
> @@ -40,7 +40,7 @@ static void arch_common_suspend(void)
>         loongarch_suspend_addr = loongson_sysconf.suspend_addr;
>  }
>
> -static void arch_common_resume(void)
> +void loongarch_common_resume(void)
>  {
>         sync_counter();
>         local_flush_tlb_all();
> @@ -62,12 +62,12 @@ int loongarch_acpi_suspend(void)
>         enable_gpe_wakeup();
>         enable_pci_wakeup();
>
> -       arch_common_suspend();
> +       loongarch_common_suspend();
>
>         /* processor specific suspend */
>         loongarch_suspend_enter();
>
> -       arch_common_resume();
> +       loongarch_common_resume();
>
>         return 0;
>  }
> --
> 2.20.1
>