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ARM: tegra: Convert PMC to a driver

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This commit converts the PMC support code to a platform driver. Because
the boot process needs to call into this driver very early, also set up
a minimal environment via an early initcall.

Signed-off-by: Thierry Reding <[email protected]>
This commit is contained in:
Thierry Reding 2014-07-11 13:19:06 +02:00
commit 7232398abc
17 changed files with 1054 additions and 1020 deletions
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38
include/soc/tegra/pm.h Normal file
View file

@ -0,0 +1,38 @@
/*
* Copyright (C) 2014 NVIDIA Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __SOC_TEGRA_PM_H__
#define __SOC_TEGRA_PM_H__
enum tegra_suspend_mode {
TEGRA_SUSPEND_NONE = 0,
TEGRA_SUSPEND_LP2, /* CPU voltage off */
TEGRA_SUSPEND_LP1, /* CPU voltage off, DRAM self-refresh */
TEGRA_SUSPEND_LP0, /* CPU + core voltage off, DRAM self-refresh */
TEGRA_MAX_SUSPEND_MODE,
};
#ifdef CONFIG_PM_SLEEP
enum tegra_suspend_mode
tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode);
/* low-level resume entry point */
void tegra_resume(void);
#else
static inline enum tegra_suspend_mode
tegra_pm_validate_suspend_mode(enum tegra_suspend_mode mode)
{
return TEGRA_SUSPEND_NONE;
}
static inline void tegra_resume(void)
{
}
#endif /* CONFIG_PM_SLEEP */
#endif /* __SOC_TEGRA_PM_H__ */

31
include/soc/tegra/powergate.h → include/soc/tegra/pmc.h
View file

@ -1,5 +1,6 @@
/*
* Copyright (c) 2010 Google, Inc
* Copyright (c) 2014 NVIDIA Corporation
*
* Author:
* Colin Cross <ccross@google.com>
@ -15,12 +16,34 @@
*
*/
#ifndef __SOC_TEGRA_POWERGATE_H__
#define __SOC_TEGRA_POWERGATE_H__
#ifndef __SOC_TEGRA_PMC_H__
#define __SOC_TEGRA_PMC_H__
#include <linux/reboot.h>
#include <soc/tegra/pm.h>
struct clk;
struct reset_control;
void tegra_pmc_restart(enum reboot_mode mode, const char *cmd);
#ifdef CONFIG_PM_SLEEP
enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void);
void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode);
void tegra_pmc_enter_suspend_mode(enum tegra_suspend_mode mode);
#endif /* CONFIG_PM_SLEEP */
#ifdef CONFIG_SMP
bool tegra_pmc_cpu_is_powered(int cpuid);
int tegra_pmc_cpu_power_on(int cpuid);
int tegra_pmc_cpu_remove_clamping(int cpuid);
#endif /* CONFIG_SMP */
/*
* powergate and I/O rail APIs
*/
#define TEGRA_POWERGATE_CPU 0
#define TEGRA_POWERGATE_3D 1
#define TEGRA_POWERGATE_VENC 2
@ -129,6 +152,6 @@ static inline int tegra_io_rail_power_off(int id)
{
return -ENOSYS;
}
#endif
#endif /* CONFIG_ARCH_TEGRA */
#endif /* __SOC_TEGRA_POWERGATE_H__ */
#endif /* __SOC_TEGRA_PMC_H__ */