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Date: Thu, 11 Jul 2019 13:42:01 +0100
From: Jon Hunter <jonathanh@...dia.com>
To: Dmitry Osipenko <digetx@...il.com>,
Thierry Reding <thierry.reding@...il.com>,
Peter De Schrijver <pdeschrijver@...dia.com>,
"Rafael J. Wysocki" <rjw@...ysocki.net>,
Daniel Lezcano <daniel.lezcano@...aro.org>
CC: <linux-pm@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/6] ARM: tegra: Expose functions required for cpuidle
driver
On 11/07/2019 04:13, Dmitry Osipenko wrote:
> The upcoming unified CPUIDLE driver will be added to the drivers/cpuidle/
> directory and it will require all these Tegra PM-core functions.
>
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
> arch/arm/mach-tegra/Makefile | 2 +-
> arch/arm/mach-tegra/platsmp.c | 2 --
> arch/arm/mach-tegra/pm.c | 16 +++++++---------
> arch/arm/mach-tegra/pm.h | 3 ---
> arch/arm/mach-tegra/sleep.h | 1 -
> include/linux/clk/tegra.h | 13 +++++++++++++
> include/soc/tegra/pm.h | 28 ++++++++++++++++++++++++++++
> 7 files changed, 49 insertions(+), 16 deletions(-)
>
> diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
> index 5d93a0b36866..27bd5d9865e3 100644
> --- a/arch/arm/mach-tegra/Makefile
> +++ b/arch/arm/mach-tegra/Makefile
> @@ -13,7 +13,7 @@ obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += pm-tegra20.o
> obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += sleep-tegra30.o
> obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += pm-tegra30.o
> obj-$(CONFIG_SMP) += platsmp.o
> -obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
> +obj-y += hotplug.o
>
> obj-$(CONFIG_ARCH_TEGRA_114_SOC) += sleep-tegra30.o
> obj-$(CONFIG_ARCH_TEGRA_114_SOC) += pm-tegra30.o
> diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c
> index e6911a14c096..c8a63719a143 100644
> --- a/arch/arm/mach-tegra/platsmp.c
> +++ b/arch/arm/mach-tegra/platsmp.c
> @@ -183,8 +183,6 @@ const struct smp_operations tegra_smp_ops __initconst = {
> .smp_prepare_cpus = tegra_smp_prepare_cpus,
> .smp_secondary_init = tegra_secondary_init,
> .smp_boot_secondary = tegra_boot_secondary,
> -#ifdef CONFIG_HOTPLUG_CPU
> .cpu_kill = tegra_cpu_kill,
> .cpu_die = tegra_cpu_die,
> -#endif
> };
> diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
> index 6aaacb5757e1..f9c9bce9e15d 100644
> --- a/arch/arm/mach-tegra/pm.c
> +++ b/arch/arm/mach-tegra/pm.c
> @@ -123,11 +123,9 @@ void tegra_clear_cpu_in_lp2(void)
> spin_unlock(&tegra_lp2_lock);
> }
>
> -bool tegra_set_cpu_in_lp2(void)
> +void tegra_set_cpu_in_lp2(void)
> {
> int phy_cpu_id = cpu_logical_map(smp_processor_id());
> - bool last_cpu = false;
> - cpumask_t *cpu_lp2_mask = tegra_cpu_lp2_mask;
> u32 *cpu_in_lp2 = tegra_cpu_lp2_mask;
>
> spin_lock(&tegra_lp2_lock);
> @@ -135,11 +133,7 @@ bool tegra_set_cpu_in_lp2(void)
> BUG_ON((*cpu_in_lp2 & BIT(phy_cpu_id)));
> *cpu_in_lp2 |= BIT(phy_cpu_id);
>
> - if ((phy_cpu_id == 0) && cpumask_equal(cpu_lp2_mask, cpu_online_mask))
> - last_cpu = true;
> -
> spin_unlock(&tegra_lp2_lock);
> - return last_cpu;
> }
I think that the commit message should describe what is going on here or
this should be a separate change.
>
> static int tegra_sleep_cpu(unsigned long v2p)
> @@ -195,14 +189,16 @@ static void tegra_pm_set(enum tegra_suspend_mode mode)
> tegra_pmc_enter_suspend_mode(mode);
> }
>
> -void tegra_idle_lp2_last(void)
> +int tegra_idle_lp2_last(void)
> {
> + int err;
> +
> tegra_pm_set(TEGRA_SUSPEND_LP2);
>
> cpu_cluster_pm_enter();
> suspend_cpu_complex();
>
> - cpu_suspend(PHYS_OFFSET - PAGE_OFFSET, &tegra_sleep_cpu);
> + err = cpu_suspend(PHYS_OFFSET - PAGE_OFFSET, &tegra_sleep_cpu);
>
> /*
> * Resume L2 cache if it wasn't re-enabled early during resume,
> @@ -214,6 +210,8 @@ void tegra_idle_lp2_last(void)
>
> restore_cpu_complex();
> cpu_cluster_pm_exit();
> +
> + return err;
> }
>
> enum tegra_suspend_mode tegra_pm_validate_suspend_mode(
> diff --git a/arch/arm/mach-tegra/pm.h b/arch/arm/mach-tegra/pm.h
> index 1e51a9b636eb..81525f5f4a44 100644
> --- a/arch/arm/mach-tegra/pm.h
> +++ b/arch/arm/mach-tegra/pm.h
> @@ -23,9 +23,6 @@ void tegra20_sleep_core_init(void);
> void tegra30_lp1_iram_hook(void);
> void tegra30_sleep_core_init(void);
>
> -void tegra_clear_cpu_in_lp2(void);
> -bool tegra_set_cpu_in_lp2(void);
> -void tegra_idle_lp2_last(void);
> extern void (*tegra_tear_down_cpu)(void);
>
> #ifdef CONFIG_PM_SLEEP
> diff --git a/arch/arm/mach-tegra/sleep.h b/arch/arm/mach-tegra/sleep.h
> index d219872b7546..0d9956e9a8ea 100644
> --- a/arch/arm/mach-tegra/sleep.h
> +++ b/arch/arm/mach-tegra/sleep.h
> @@ -124,7 +124,6 @@ void tegra30_hotplug_shutdown(void);
> #endif
>
> void tegra20_tear_down_cpu(void);
> -int tegra30_sleep_cpu_secondary_finish(unsigned long);
> void tegra30_tear_down_cpu(void);
>
> #endif
> diff --git a/include/linux/clk/tegra.h b/include/linux/clk/tegra.h
> index b8aef62cc3f5..cf0f2cb5e109 100644
> --- a/include/linux/clk/tegra.h
> +++ b/include/linux/clk/tegra.h
> @@ -108,6 +108,19 @@ static inline void tegra_cpu_clock_resume(void)
>
> tegra_cpu_car_ops->resume();
> }
> +#else
> +static inline bool tegra_cpu_rail_off_ready(void)
> +{
> + return false;
> +}
> +
> +static inline void tegra_cpu_clock_suspend(void)
> +{
> +}
> +
> +static inline void tegra_cpu_clock_resume(void)
> +{
> +}
> #endif
>
> extern void tegra210_xusb_pll_hw_control_enable(void);
> diff --git a/include/soc/tegra/pm.h b/include/soc/tegra/pm.h
> index 951fcd738d55..fa18c2df5028 100644
> --- a/include/soc/tegra/pm.h
> +++ b/include/soc/tegra/pm.h
> @@ -20,6 +20,12 @@ tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode);
>
> /* low-level resume entry point */
> void tegra_resume(void);
> +
> +int tegra30_sleep_cpu_secondary_finish(unsigned long arg);
> +void tegra_clear_cpu_in_lp2(void);
> +void tegra_set_cpu_in_lp2(void);
> +int tegra_idle_lp2_last(void);
> +void tegra_cpu_die(unsigned int cpu);
> #else
> static inline enum tegra_suspend_mode
> tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode)
> @@ -30,6 +36,28 @@ tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode)
> static inline void tegra_resume(void)
> {
> }
> +
> +static inline int tegra30_sleep_cpu_secondary_finish(unsigned long arg)
> +{
> + return -1;
> +}
-ENOTSUPP?
Jon
--
nvpublic
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