[mirror_ubuntu-bionic-kernel.git] / drivers / clk / sunxi-ng / ccu_common.h

/*
 * Copyright (c) 2016 Maxime Ripard. All rights reserved.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that 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.
 */

#ifndef _COMMON_H_
#define _COMMON_H_

#include <linux/compiler.h>
#include <linux/clk-provider.h>

#define CCU_FEATURE_FRACTIONAL		BIT(0)
#define CCU_FEATURE_VARIABLE_PREDIV	BIT(1)
#define CCU_FEATURE_FIXED_PREDIV	BIT(2)
#define CCU_FEATURE_FIXED_POSTDIV	BIT(3)
#define CCU_FEATURE_ALL_PREDIV		BIT(4)
#define CCU_FEATURE_LOCK_REG		BIT(5)

struct device_node;

#define CLK_HW_INIT(_name, _parent, _ops, _flags)			\
	&(struct clk_init_data) {					\
		.flags		= _flags,				\
		.name		= _name,				\
		.parent_names	= (const char *[]) { _parent },		\
		.num_parents	= 1,					\
		.ops 		= _ops,					\
	}

#define CLK_HW_INIT_PARENTS(_name, _parents, _ops, _flags)		\
	&(struct clk_init_data) {					\
		.flags		= _flags,				\
		.name		= _name,				\
		.parent_names	= _parents,				\
		.num_parents	= ARRAY_SIZE(_parents),			\
		.ops 		= _ops,					\
	}

#define CLK_FIXED_FACTOR(_struct, _name, _parent,			\
			_div, _mult, _flags)				\
	struct clk_fixed_factor _struct = {				\
		.div		= _div,					\
		.mult		= _mult,				\
		.hw.init	= CLK_HW_INIT(_name,			\
					      _parent,			\
					      &clk_fixed_factor_ops,	\
					      _flags),			\
	}

struct ccu_common {
	void __iomem	*base;
	u16		reg;
	u16		lock_reg;
	u32		prediv;

	unsigned long	features;
	spinlock_t	*lock;
	struct clk_hw	hw;
};

static inline struct ccu_common *hw_to_ccu_common(struct clk_hw *hw)
{
	return container_of(hw, struct ccu_common, hw);
}

struct sunxi_ccu_desc {
	struct ccu_common		**ccu_clks;
	unsigned long			num_ccu_clks;

	struct clk_hw_onecell_data	*hw_clks;

	struct ccu_reset_map		*resets;
	unsigned long			num_resets;
};

void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock);

struct ccu_pll_nb {
	struct notifier_block	clk_nb;
	struct ccu_common	*common;

	u32	enable;
	u32	lock;
};

#define to_ccu_pll_nb(_nb) container_of(_nb, struct ccu_pll_nb, clk_nb)

int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb);

int sunxi_ccu_probe(struct device_node *node, void __iomem *reg,
		    const struct sunxi_ccu_desc *desc);

#endif /* _COMMON_H_ */
Commit	Line	Data
1d80c142 MR	1	/*
	2	* Copyright (c) 2016 Maxime Ripard. All rights reserved.
	3	*
	4	* This software is licensed under the terms of the GNU General Public
	5	* License version 2, as published by the Free Software Foundation, and
	6	* may be copied, distributed, and modified under those terms.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*/
	13
	14	#ifndef _COMMON_H_
	15	#define _COMMON_H_
	16
	17	#include <linux/compiler.h>
	18	#include <linux/clk-provider.h>
	19
	20	#define CCU_FEATURE_FRACTIONAL BIT(0)
	21	#define CCU_FEATURE_VARIABLE_PREDIV BIT(1)
	22	#define CCU_FEATURE_FIXED_PREDIV BIT(2)
	23	#define CCU_FEATURE_FIXED_POSTDIV BIT(3)
7c09b858	24	#define CCU_FEATURE_ALL_PREDIV BIT(4)
3de64bf1	25	#define CCU_FEATURE_LOCK_REG BIT(5)
1d80c142 MR	26
	27	struct device_node;
	28
	29	#define CLK_HW_INIT(_name, _parent, _ops, _flags) \
	30	&(struct clk_init_data) { \
	31	.flags = _flags, \
	32	.name = _name, \
	33	.parent_names = (const char *[]) { _parent }, \
	34	.num_parents = 1, \
	35	.ops = _ops, \
	36	}
	37
	38	#define CLK_HW_INIT_PARENTS(_name, _parents, _ops, _flags) \
	39	&(struct clk_init_data) { \
	40	.flags = _flags, \
	41	.name = _name, \
	42	.parent_names = _parents, \
	43	.num_parents = ARRAY_SIZE(_parents), \
	44	.ops = _ops, \
	45	}
	46
	47	#define CLK_FIXED_FACTOR(_struct, _name, _parent, \
	48	_div, _mult, _flags) \
	49	struct clk_fixed_factor _struct = { \
	50	.div = _div, \
	51	.mult = _mult, \
	52	.hw.init = CLK_HW_INIT(_name, \
	53	_parent, \
	54	&clk_fixed_factor_ops, \
	55	_flags), \
	56	}
	57
	58	struct ccu_common {
	59	void __iomem *base;
	60	u16 reg;
3de64bf1	61	u16 lock_reg;
7c09b858	62	u32 prediv;
1d80c142 MR	63
	64	unsigned long features;
	65	spinlock_t *lock;
	66	struct clk_hw hw;
	67	};
	68
	69	static inline struct ccu_common hw_to_ccu_common(struct clk_hw hw)
	70	{
	71	return container_of(hw, struct ccu_common, hw);
	72	}
	73
	74	struct sunxi_ccu_desc {
	75	struct ccu_common **ccu_clks;
	76	unsigned long num_ccu_clks;
	77
	78	struct clk_hw_onecell_data *hw_clks;
	79
	80	struct ccu_reset_map *resets;
	81	unsigned long num_resets;
	82	};
	83
	84	void ccu_helper_wait_for_lock(struct ccu_common *common, u32 lock);
	85
02ae2bc6 CYT	86	struct ccu_pll_nb {
	87	struct notifier_block clk_nb;
	88	struct ccu_common *common;
	89
	90	u32 enable;
	91	u32 lock;
	92	};
	93
	94	#define to_ccu_pll_nb(_nb) container_of(_nb, struct ccu_pll_nb, clk_nb)
	95
	96	int ccu_pll_notifier_register(struct ccu_pll_nb *pll_nb);
	97
1d80c142 MR	98	int sunxi_ccu_probe(struct device_node node, void __iomem reg,
	99	const struct sunxi_ccu_desc *desc);
	100
	101	#endif /* _COMMON_H_ */