xref: /openbmc/linux/drivers/clk/actions/owl-factor.h (revision c39f2d9db0fd81ea20bb5cce9b3f082ca63753e2)
1*ddd3e8b9SNishad Kamdar /* SPDX-License-Identifier: GPL-2.0+ */
24bb78fc9SManivannan Sadhasivam //
34bb78fc9SManivannan Sadhasivam // OWL factor clock driver
44bb78fc9SManivannan Sadhasivam //
54bb78fc9SManivannan Sadhasivam // Copyright (c) 2014 Actions Semi Inc.
64bb78fc9SManivannan Sadhasivam // Author: David Liu <liuwei@actions-semi.com>
74bb78fc9SManivannan Sadhasivam //
84bb78fc9SManivannan Sadhasivam // Copyright (c) 2018 Linaro Ltd.
94bb78fc9SManivannan Sadhasivam // Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
104bb78fc9SManivannan Sadhasivam 
114bb78fc9SManivannan Sadhasivam #ifndef _OWL_FACTOR_H_
124bb78fc9SManivannan Sadhasivam #define _OWL_FACTOR_H_
134bb78fc9SManivannan Sadhasivam 
144bb78fc9SManivannan Sadhasivam #include "owl-common.h"
154bb78fc9SManivannan Sadhasivam 
164bb78fc9SManivannan Sadhasivam struct clk_factor_table {
174bb78fc9SManivannan Sadhasivam 	unsigned int		val;
184bb78fc9SManivannan Sadhasivam 	unsigned int		mul;
194bb78fc9SManivannan Sadhasivam 	unsigned int		div;
204bb78fc9SManivannan Sadhasivam };
214bb78fc9SManivannan Sadhasivam 
224bb78fc9SManivannan Sadhasivam struct owl_factor_hw {
234bb78fc9SManivannan Sadhasivam 	u32			reg;
244bb78fc9SManivannan Sadhasivam 	u8			shift;
254bb78fc9SManivannan Sadhasivam 	u8			width;
264bb78fc9SManivannan Sadhasivam 	u8			fct_flags;
274bb78fc9SManivannan Sadhasivam 	struct clk_factor_table	*table;
284bb78fc9SManivannan Sadhasivam };
294bb78fc9SManivannan Sadhasivam 
304bb78fc9SManivannan Sadhasivam struct owl_factor {
314bb78fc9SManivannan Sadhasivam 	struct owl_factor_hw	factor_hw;
324bb78fc9SManivannan Sadhasivam 	struct owl_clk_common	common;
334bb78fc9SManivannan Sadhasivam };
344bb78fc9SManivannan Sadhasivam 
354bb78fc9SManivannan Sadhasivam #define OWL_FACTOR_HW(_reg, _shift, _width, _fct_flags, _table)		\
364bb78fc9SManivannan Sadhasivam 	{								\
374bb78fc9SManivannan Sadhasivam 		.reg		= _reg,					\
384bb78fc9SManivannan Sadhasivam 		.shift		= _shift,				\
394bb78fc9SManivannan Sadhasivam 		.width		= _width,				\
404bb78fc9SManivannan Sadhasivam 		.fct_flags	= _fct_flags,				\
414bb78fc9SManivannan Sadhasivam 		.table		= _table,				\
424bb78fc9SManivannan Sadhasivam 	}
434bb78fc9SManivannan Sadhasivam 
444bb78fc9SManivannan Sadhasivam #define OWL_FACTOR(_struct, _name, _parent, _reg,			\
454bb78fc9SManivannan Sadhasivam 		   _shift, _width, _table, _fct_flags, _flags)		\
464bb78fc9SManivannan Sadhasivam 	struct owl_factor _struct = {					\
474bb78fc9SManivannan Sadhasivam 		.factor_hw = OWL_FACTOR_HW(_reg, _shift,		\
484bb78fc9SManivannan Sadhasivam 					   _width, _fct_flags, _table),	\
494bb78fc9SManivannan Sadhasivam 		.common = {						\
504bb78fc9SManivannan Sadhasivam 			.regmap		= NULL,				\
514bb78fc9SManivannan Sadhasivam 			.hw.init	= CLK_HW_INIT(_name,		\
524bb78fc9SManivannan Sadhasivam 						      _parent,		\
534bb78fc9SManivannan Sadhasivam 						      &owl_factor_ops,	\
544bb78fc9SManivannan Sadhasivam 						      _flags),		\
554bb78fc9SManivannan Sadhasivam 		},							\
564bb78fc9SManivannan Sadhasivam 	}
574bb78fc9SManivannan Sadhasivam 
584bb78fc9SManivannan Sadhasivam #define div_mask(d) ((1 << ((d)->width)) - 1)
594bb78fc9SManivannan Sadhasivam 
hw_to_owl_factor(const struct clk_hw * hw)604bb78fc9SManivannan Sadhasivam static inline struct owl_factor *hw_to_owl_factor(const struct clk_hw *hw)
614bb78fc9SManivannan Sadhasivam {
624bb78fc9SManivannan Sadhasivam 	struct owl_clk_common *common = hw_to_owl_clk_common(hw);
634bb78fc9SManivannan Sadhasivam 
644bb78fc9SManivannan Sadhasivam 	return container_of(common, struct owl_factor, common);
654bb78fc9SManivannan Sadhasivam }
664bb78fc9SManivannan Sadhasivam 
674bb78fc9SManivannan Sadhasivam long owl_factor_helper_round_rate(struct owl_clk_common *common,
684bb78fc9SManivannan Sadhasivam 				const struct owl_factor_hw *factor_hw,
694bb78fc9SManivannan Sadhasivam 				unsigned long rate,
704bb78fc9SManivannan Sadhasivam 				unsigned long *parent_rate);
714bb78fc9SManivannan Sadhasivam 
724bb78fc9SManivannan Sadhasivam unsigned long owl_factor_helper_recalc_rate(struct owl_clk_common *common,
734bb78fc9SManivannan Sadhasivam 					 const struct owl_factor_hw *factor_hw,
744bb78fc9SManivannan Sadhasivam 					 unsigned long parent_rate);
754bb78fc9SManivannan Sadhasivam 
764bb78fc9SManivannan Sadhasivam int owl_factor_helper_set_rate(const struct owl_clk_common *common,
774bb78fc9SManivannan Sadhasivam 				const struct owl_factor_hw *factor_hw,
784bb78fc9SManivannan Sadhasivam 				unsigned long rate,
794bb78fc9SManivannan Sadhasivam 				unsigned long parent_rate);
804bb78fc9SManivannan Sadhasivam 
814bb78fc9SManivannan Sadhasivam extern const struct clk_ops owl_factor_ops;
824bb78fc9SManivannan Sadhasivam 
834bb78fc9SManivannan Sadhasivam #endif /* _OWL_FACTOR_H_ */
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