1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2014-2018 MediaTek Inc.
4  *
5  * Author: Maoguang Meng <maoguang.meng@mediatek.com>
6  *	   Sean Wang <sean.wang@mediatek.com>
7  *
8  */
9 #ifndef __MTK_EINT_H
10 #define __MTK_EINT_H
11 
12 #include <linux/irqdomain.h>
13 
14 struct mtk_eint_regs {
15 	unsigned int	stat;
16 	unsigned int	ack;
17 	unsigned int	mask;
18 	unsigned int	mask_set;
19 	unsigned int	mask_clr;
20 	unsigned int	sens;
21 	unsigned int	sens_set;
22 	unsigned int	sens_clr;
23 	unsigned int	soft;
24 	unsigned int	soft_set;
25 	unsigned int	soft_clr;
26 	unsigned int	pol;
27 	unsigned int	pol_set;
28 	unsigned int	pol_clr;
29 	unsigned int	dom_en;
30 	unsigned int	dbnc_ctrl;
31 	unsigned int	dbnc_set;
32 	unsigned int	dbnc_clr;
33 };
34 
35 struct mtk_eint_hw {
36 	u8		port_mask;
37 	u8		ports;
38 	unsigned int	ap_num;
39 	unsigned int	db_cnt;
40 };
41 
42 struct mtk_eint;
43 
44 struct mtk_eint_xt {
45 	int (*get_gpio_n)(void *data, unsigned long eint_n,
46 			  unsigned int *gpio_n,
47 			  struct gpio_chip **gpio_chip);
48 	int (*get_gpio_state)(void *data, unsigned long eint_n);
49 	int (*set_gpio_as_eint)(void *data, unsigned long eint_n);
50 };
51 
52 struct mtk_eint {
53 	struct device *dev;
54 	void __iomem *base;
55 	struct irq_domain *domain;
56 	int irq;
57 
58 	int *dual_edge;
59 	u32 *wake_mask;
60 	u32 *cur_mask;
61 
62 	/* Used to fit into various EINT device */
63 	const struct mtk_eint_hw *hw;
64 	const struct mtk_eint_regs *regs;
65 
66 	/* Used to fit into various pinctrl device */
67 	void *pctl;
68 	const struct mtk_eint_xt *gpio_xlate;
69 };
70 
71 #if IS_ENABLED(CONFIG_EINT_MTK)
72 int mtk_eint_do_init(struct mtk_eint *eint);
73 int mtk_eint_do_suspend(struct mtk_eint *eint);
74 int mtk_eint_do_resume(struct mtk_eint *eint);
75 int mtk_eint_set_debounce(struct mtk_eint *eint, unsigned long eint_n,
76 			  unsigned int debounce);
77 int mtk_eint_find_irq(struct mtk_eint *eint, unsigned long eint_n);
78 
79 #else
mtk_eint_do_init(struct mtk_eint * eint)80 static inline int mtk_eint_do_init(struct mtk_eint *eint)
81 {
82 	return -EOPNOTSUPP;
83 }
84 
mtk_eint_do_suspend(struct mtk_eint * eint)85 static inline int mtk_eint_do_suspend(struct mtk_eint *eint)
86 {
87 	return -EOPNOTSUPP;
88 }
89 
mtk_eint_do_resume(struct mtk_eint * eint)90 static inline int mtk_eint_do_resume(struct mtk_eint *eint)
91 {
92 	return -EOPNOTSUPP;
93 }
94 
mtk_eint_set_debounce(struct mtk_eint * eint,unsigned long eint_n,unsigned int debounce)95 static inline int mtk_eint_set_debounce(struct mtk_eint *eint, unsigned long eint_n,
96 			  unsigned int debounce)
97 {
98 	return -EOPNOTSUPP;
99 }
100 
mtk_eint_find_irq(struct mtk_eint * eint,unsigned long eint_n)101 static inline int mtk_eint_find_irq(struct mtk_eint *eint, unsigned long eint_n)
102 {
103 	return -EOPNOTSUPP;
104 }
105 #endif
106 #endif /* __MTK_EINT_H */
107