/*
* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef __LINUX_CLK_TEGRA_H_
#define __LINUX_CLK_TEGRA_H_

#include <linux/clk.h>

/*
* Tegra CPU clock and reset control ops
*
* wait_for_reset:
* keep waiting until the CPU in reset state
* put_in_reset:
* put the CPU in reset state
* out_of_reset:
* release the CPU from reset state
* enable_clock:
* CPU clock un-gate
* disable_clock:
* CPU clock gate
* rail_off_ready:
* CPU is ready for rail off
* suspend:
* save the clock settings when CPU go into low-power state
* resume:
* restore the clock settings when CPU exit low-power state
*/
struct tegra_cpu_car_ops {
void (*wait_for_reset)(u32 cpu);
void (*put_in_reset)(u32 cpu);
void (*out_of_reset)(u32 cpu);
void (*enable_clock)(u32 cpu);
void (*disable_clock)(u32 cpu);
#ifdef CONFIG_PM_SLEEP
bool (*rail_off_ready)(void);
void (*suspend)(void);
void (*resume)(void);
#endif
};

extern struct tegra_cpu_car_ops *tegra_cpu_car_ops;

static inline void tegra_wait_cpu_in_reset(u32 cpu)
{
if (WARN_ON(!tegra_cpu_car_ops->wait_for_reset))
return;

tegra_cpu_car_ops->wait_for_reset(cpu);
}

static inline void tegra_put_cpu_in_reset(u32 cpu)
{
if (WARN_ON(!tegra_cpu_car_ops->put_in_reset))
return;

tegra_cpu_car_ops->put_in_reset(cpu);
}

static inline void tegra_cpu_out_of_reset(u32 cpu)
{
if (WARN_ON(!tegra_cpu_car_ops->out_of_reset))
return;

tegra_cpu_car_ops->out_of_reset(cpu);
}

static inline void tegra_enable_cpu_clock(u32 cpu)
{
if (WARN_ON(!tegra_cpu_car_ops->enable_clock))
return;

tegra_cpu_car_ops->enable_clock(cpu);
}

static inline void tegra_disable_cpu_clock(u32 cpu)
{
if (WARN_ON(!tegra_cpu_car_ops->disable_clock))
return;

tegra_cpu_car_ops->disable_clock(cpu);
}

#ifdef CONFIG_PM_SLEEP
static inline bool tegra_cpu_rail_off_ready(void)
{
if (WARN_ON(!tegra_cpu_car_ops->rail_off_ready))
return false;

return tegra_cpu_car_ops->rail_off_ready();
}

static inline void tegra_cpu_clock_suspend(void)
{
if (WARN_ON(!tegra_cpu_car_ops->suspend))
return;

tegra_cpu_car_ops->suspend();
}

static inline void tegra_cpu_clock_resume(void)
{
if (WARN_ON(!tegra_cpu_car_ops->resume))
return;

tegra_cpu_car_ops->resume();
}
#endif

#ifdef CONFIG_ARCH_TEGRA
void tegra_periph_reset_deassert(struct clk *c);
void tegra_periph_reset_assert(struct clk *c);
#else
static inline void tegra_periph_reset_deassert(struct clk *c) {}
static inline void tegra_periph_reset_assert(struct clk *c) {}
#endif
void tegra_clocks_apply_init_table(void);

#endif /* __LINUX_CLK_TEGRA_H_ */