clk/actions/owl-gate.h

0001 /* SPDX-License-Identifier: GPL-2.0+ */
0002 //
0003 // OWL gate clock driver
0004 //
0005 // Copyright (c) 2014 Actions Semi Inc.
0006 // Author: David Liu <liuwei@actions-semi.com>
0007 //
0008 // Copyright (c) 2018 Linaro Ltd.
0009 // Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
0010
0011 #ifndef _OWL_GATE_H_
0012 #define _OWL_GATE_H_
0013
0014 #include "owl-common.h"
0015
0016 struct owl_gate_hw {
0017     u32         reg;
0018     u8          bit_idx;
0019     u8          gate_flags;
0020 };
0021
0022 struct owl_gate {
0023     struct owl_gate_hw  gate_hw;
0024     struct owl_clk_common   common;
0025 };
0026
0027 #define OWL_GATE_HW(_reg, _bit_idx, _gate_flags)    \
0028     {                       \
0029         .reg        = _reg,         \
0030         .bit_idx    = _bit_idx,     \
0031         .gate_flags = _gate_flags,      \
0032     }
0033
0034 #define OWL_GATE(_struct, _name, _parent, _reg,             \
0035         _bit_idx, _gate_flags, _flags)              \
0036     struct owl_gate _struct = {                 \
0037         .gate_hw = OWL_GATE_HW(_reg, _bit_idx, _gate_flags),    \
0038         .common = {                     \
0039             .regmap     = NULL,             \
0040             .hw.init    = CLK_HW_INIT(_name,        \
0041                               _parent,      \
0042                               &owl_gate_ops,    \
0043                               _flags),      \
0044         }                           \
0045     }                               \
0046
0047 #define OWL_GATE_NO_PARENT(_struct, _name, _reg,            \
0048         _bit_idx, _gate_flags, _flags)              \
0049     struct owl_gate _struct = {                 \
0050         .gate_hw = OWL_GATE_HW(_reg, _bit_idx, _gate_flags),    \
0051         .common = {                     \
0052             .regmap     = NULL,             \
0053             .hw.init    = CLK_HW_INIT_NO_PARENT(_name,  \
0054                               &owl_gate_ops,    \
0055                               _flags),      \
0056         },                          \
0057     }                               \
0058
0059 static inline struct owl_gate *hw_to_owl_gate(const struct clk_hw *hw)
0060 {
0061     struct owl_clk_common *common = hw_to_owl_clk_common(hw);
0062
0063     return container_of(common, struct owl_gate, common);
0064 }
0065
0066 void owl_gate_set(const struct owl_clk_common *common,
0067          const struct owl_gate_hw *gate_hw, bool enable);
0068 int owl_gate_clk_is_enabled(const struct owl_clk_common *common,
0069            const struct owl_gate_hw *gate_hw);
0070
0071 extern const struct clk_ops owl_gate_ops;
0072
0073 #endif /* _OWL_GATE_H_ */