1 /*
2  * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #ifndef __PINCTRL_UNIPHIER_H__
8 #define __PINCTRL_UNIPHIER_H__
9 
10 #include <linux/bug.h>
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 
14 #define UNIPHIER_PINCTRL_PINMUX_BASE	0x0
15 #define UNIPHIER_PINCTRL_LOAD_PINMUX	0x700
16 #define UNIPHIER_PINCTRL_IECTRL		0xd00
17 
18 #define UNIPHIER_PIN_ATTR_PACKED(iectrl)	(iectrl)
19 
20 static inline unsigned int uniphier_pin_get_iectrl(unsigned long data)
21 {
22 	return data;
23 }
24 
25 /**
26  * struct uniphier_pinctrl_pin - pin data for UniPhier SoC
27  *
28  * @number: pin number
29  * @data: additional per-pin data
30  */
31 struct uniphier_pinctrl_pin {
32 	unsigned number;
33 	unsigned long data;
34 };
35 
36 /**
37  * struct uniphier_pinctrl_group - pin group data for UniPhier SoC
38  *
39  * @name: pin group name
40  * @pins: array of pins that belong to the group
41  * @num_pins: number of pins in the group
42  * @muxvals: array of values to be set to pinmux registers
43  */
44 struct uniphier_pinctrl_group {
45 	const char *name;
46 	const unsigned *pins;
47 	unsigned num_pins;
48 	const unsigned *muxvals;
49 };
50 
51 /**
52  * struct uniphier_pinctrl_socdata - SoC data for UniPhier pin controller
53  *
54  * @pins: array of pin data
55  * @pins_count: number of pin data
56  * @groups: array of pin group data
57  * @groups_count: number of pin group data
58  * @functions: array of pinmux function names
59  * @functions_count: number of pinmux functions
60  * @mux_bits: bit width of each pinmux register
61  * @reg_stride: stride of pinmux register address
62  * @load_pinctrl: if true, LOAD_PINMUX register must be set to one for new
63  *		  values in pinmux registers to become really effective
64  */
65 struct uniphier_pinctrl_socdata {
66 	const struct uniphier_pinctrl_pin *pins;
67 	int pins_count;
68 	const struct uniphier_pinctrl_group *groups;
69 	int groups_count;
70 	const char * const *functions;
71 	int functions_count;
72 	unsigned mux_bits;
73 	unsigned reg_stride;
74 	bool load_pinctrl;
75 };
76 
77 #define UNIPHIER_PINCTRL_PIN(a, b)					\
78 {									\
79 	.number = a,							\
80 	.data = UNIPHIER_PIN_ATTR_PACKED(b),				\
81 }
82 
83 #define UNIPHIER_PINCTRL_GROUP(grp)					\
84 	{								\
85 		.name = #grp,						\
86 		.pins = grp##_pins,					\
87 		.num_pins = ARRAY_SIZE(grp##_pins),			\
88 		.muxvals = grp##_muxvals +				\
89 			BUILD_BUG_ON_ZERO(ARRAY_SIZE(grp##_pins) !=	\
90 					  ARRAY_SIZE(grp##_muxvals)),	\
91 	}
92 
93 /**
94  * struct uniphier_pinctrl_priv - private data for UniPhier pinctrl driver
95  *
96  * @base: base address of the pinctrl device
97  * @socdata: SoC specific data
98  */
99 struct uniphier_pinctrl_priv {
100 	void __iomem *base;
101 	struct uniphier_pinctrl_socdata *socdata;
102 };
103 
104 extern const struct pinctrl_ops uniphier_pinctrl_ops;
105 
106 int uniphier_pinctrl_probe(struct udevice *dev,
107 			   struct uniphier_pinctrl_socdata *socdata);
108 
109 int uniphier_pinctrl_remove(struct udevice *dev);
110 
111 #endif /* __PINCTRL_UNIPHIER_H__ */
112