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Subject[PATCH v2 2/6] ARM: tegra: Expose functions required for cpuidle driver
Date
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@gmail.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;
}

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;
+}
+
+static inline void tegra_clear_cpu_in_lp2(void)
+{
+}
+
+static inline void tegra_set_cpu_in_lp2(void)
+{
+}
+
+static inline int tegra_idle_lp2_last(void)
+{
+ return -1;
+}
+
+static inline void tegra_cpu_die(unsigned int cpu)
+{
+}
#endif /* CONFIG_PM_SLEEP */

#endif /* __SOC_TEGRA_PM_H__ */
--
2.22.0
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