linux/drivers/clk/imx/clk-scu.h
Dong Aisheng ea0c5cbaf8 clk: imx: lpcg: add suspend/resume support
LPCG clock state may be lost when it's power domain is completely
off during system suspend/resume and we need save and restore the
state properly.

Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2020-10-26 10:54:08 +08:00

69 lines
2.2 KiB
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright 2018 NXP
* Dong Aisheng <aisheng.dong@nxp.com>
*/
#ifndef __IMX_CLK_SCU_H
#define __IMX_CLK_SCU_H
#include <linux/firmware/imx/sci.h>
#include <linux/of.h>
extern struct list_head imx_scu_clks[];
extern const struct dev_pm_ops imx_clk_lpcg_scu_pm_ops;
int imx_clk_scu_init(struct device_node *np);
struct clk_hw *imx_scu_of_clk_src_get(struct of_phandle_args *clkspec,
void *data);
struct clk_hw *imx_clk_scu_alloc_dev(const char *name,
const char * const *parents,
int num_parents, u32 rsrc_id, u8 clk_type);
struct clk_hw *__imx_clk_scu(struct device *dev, const char *name,
const char * const *parents, int num_parents,
u32 rsrc_id, u8 clk_type);
void imx_clk_scu_unregister(void);
struct clk_hw *__imx_clk_lpcg_scu(struct device *dev, const char *name,
const char *parent_name, unsigned long flags,
void __iomem *reg, u8 bit_idx, bool hw_gate);
void imx_clk_lpcg_scu_unregister(struct clk_hw *hw);
static inline struct clk_hw *imx_clk_scu(const char *name, u32 rsrc_id,
u8 clk_type, u8 clk_cells)
{
if (clk_cells == 2)
return imx_clk_scu_alloc_dev(name, NULL, 0, rsrc_id, clk_type);
else
return __imx_clk_scu(NULL, name, NULL, 0, rsrc_id, clk_type);
}
static inline struct clk_hw *imx_clk_scu2(const char *name, const char * const *parents,
int num_parents, u32 rsrc_id, u8 clk_type,
u8 clk_cells)
{
if (clk_cells == 2)
return imx_clk_scu_alloc_dev(name, parents, num_parents, rsrc_id, clk_type);
else
return __imx_clk_scu(NULL, name, parents, num_parents, rsrc_id, clk_type);
}
static inline struct clk_hw *imx_clk_lpcg_scu_dev(struct device *dev, const char *name,
const char *parent_name, unsigned long flags,
void __iomem *reg, u8 bit_idx, bool hw_gate)
{
return __imx_clk_lpcg_scu(dev, name, parent_name, flags, reg,
bit_idx, hw_gate);
}
static inline struct clk_hw *imx_clk_lpcg_scu(const char *name, const char *parent_name,
unsigned long flags, void __iomem *reg,
u8 bit_idx, bool hw_gate)
{
return __imx_clk_lpcg_scu(NULL, name, parent_name, flags, reg,
bit_idx, hw_gate);
}
#endif