1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef PINCTRL_PINCTRL_ABx500_H
3 #define PINCTRL_PINCTRL_ABx500_H
4
5 /* Package definitions */
6 #define PINCTRL_AB8500 0
7 #define PINCTRL_AB8505 1
8
9 /* pins alternate function */
10 enum abx500_pin_func {
11 ABX500_DEFAULT,
12 ABX500_ALT_A,
13 ABX500_ALT_B,
14 ABX500_ALT_C,
15 };
16
17 enum abx500_gpio_pull_updown {
18 ABX500_GPIO_PULL_DOWN = 0x0,
19 ABX500_GPIO_PULL_NONE = 0x1,
20 ABX500_GPIO_PULL_UP = 0x3,
21 };
22
23 enum abx500_gpio_vinsel {
24 ABX500_GPIO_VINSEL_VBAT = 0x0,
25 ABX500_GPIO_VINSEL_VIN_1V8 = 0x1,
26 ABX500_GPIO_VINSEL_VDD_BIF = 0x2,
27 };
28
29 /**
30 * struct abx500_function - ABx500 pinctrl mux function
31 * @name: The name of the function, exported to pinctrl core.
32 * @groups: An array of pin groups that may select this function.
33 * @ngroups: The number of entries in @groups.
34 */
35 struct abx500_function {
36 const char *name;
37 const char * const *groups;
38 unsigned ngroups;
39 };
40
41 /**
42 * struct abx500_pingroup - describes a ABx500 pin group
43 * @name: the name of this specific pin group
44 * @pins: an array of discrete physical pins used in this group, taken
45 * from the driver-local pin enumeration space
46 * @num_pins: the number of pins in this group array, i.e. the number of
47 * elements in .pins so we can iterate over that array
48 * @altsetting: the altsetting to apply to all pins in this group to
49 * configure them to be used by a function
50 */
51 struct abx500_pingroup {
52 const char *name;
53 const unsigned int *pins;
54 const unsigned npins;
55 int altsetting;
56 };
57
58 #define ALTERNATE_FUNCTIONS(pin, sel_bit, alt1, alt2, alta, altb, altc) \
59 { \
60 .pin_number = pin, \
61 .gpiosel_bit = sel_bit, \
62 .alt_bit1 = alt1, \
63 .alt_bit2 = alt2, \
64 .alta_val = alta, \
65 .altb_val = altb, \
66 .altc_val = altc, \
67 }
68
69 #define UNUSED -1
70 /**
71 * struct alternate_functions
72 * @pin_number: The pin number
73 * @gpiosel_bit: Control bit in GPIOSEL register,
74 * @alt_bit1: First AlternateFunction bit used to select the
75 * alternate function
76 * @alt_bit2: Second AlternateFunction bit used to select the
77 * alternate function
78 *
79 * these 3 following fields are necessary due to none
80 * coherency on how to select the altA, altB and altC
81 * function between the ABx500 SOC family when using
82 * alternatfunc register.
83 * @alta_val: value to write in alternatfunc to select altA function
84 * @altb_val: value to write in alternatfunc to select altB function
85 * @altc_val: value to write in alternatfunc to select altC function
86 */
87 struct alternate_functions {
88 unsigned pin_number;
89 s8 gpiosel_bit;
90 s8 alt_bit1;
91 s8 alt_bit2;
92 u8 alta_val;
93 u8 altb_val;
94 u8 altc_val;
95 };
96
97 #define GPIO_IRQ_CLUSTER(a, b, c) \
98 { \
99 .start = a, \
100 .end = b, \
101 .to_irq = c, \
102 }
103
104 /**
105 * struct abx500_gpio_irq_cluster - indicates GPIOs which are interrupt
106 * capable
107 * @start: The pin number of the first pin interrupt capable
108 * @end: The pin number of the last pin interrupt capable
109 * @to_irq: The ABx500 GPIO's associated IRQs are clustered
110 * together throughout the interrupt numbers at irregular
111 * intervals. To solve this quandary, we will place the
112 * read-in values into the cluster information table
113 */
114
115 struct abx500_gpio_irq_cluster {
116 int start;
117 int end;
118 int to_irq;
119 };
120
121 /**
122 * struct abx500_pinrange - map pin numbers to GPIO offsets
123 * @offset: offset into the GPIO local numberspace, incidentally
124 * identical to the offset into the local pin numberspace
125 * @npins: number of pins to map from both offsets
126 * @altfunc: altfunc setting to be used to enable GPIO on a pin in
127 * this range (may vary)
128 */
129 struct abx500_pinrange {
130 unsigned int offset;
131 unsigned int npins;
132 int altfunc;
133 };
134
135 #define ABX500_PINRANGE(a, b, c) { .offset = a, .npins = b, .altfunc = c }
136
137 /**
138 * struct abx500_pinctrl_soc_data - ABx500 pin controller per-SoC configuration
139 * @gpio_ranges: An array of GPIO ranges for this SoC
140 * @gpio_num_ranges: The number of GPIO ranges for this SoC
141 * @pins: An array describing all pins the pin controller affects.
142 * All pins which are also GPIOs must be listed first within the
143 * array, and be numbered identically to the GPIO controller's
144 * numbering.
145 * @npins: The number of entries in @pins.
146 * @functions: The functions supported on this SoC.
147 * @nfunction: The number of entries in @functions.
148 * @groups: An array describing all pin groups the pin SoC supports.
149 * @ngroups: The number of entries in @groups.
150 * @alternate_functions: array describing pins which supports alternate and
151 * how to set it.
152 * @gpio_irq_cluster: An array of GPIO interrupt capable for this SoC
153 * @ngpio_irq_cluster: The number of GPIO inetrrupt capable for this SoC
154 * @irq_gpio_rising_offset: Interrupt offset used as base to compute specific
155 * setting strategy of the rising interrupt line
156 * @irq_gpio_falling_offset: Interrupt offset used as base to compute specific
157 * setting strategy of the falling interrupt line
158 * @irq_gpio_factor: Factor used to compute specific setting strategy of
159 * the interrupt line
160 */
161
162 struct abx500_pinctrl_soc_data {
163 const struct abx500_pinrange *gpio_ranges;
164 unsigned gpio_num_ranges;
165 const struct pinctrl_pin_desc *pins;
166 unsigned npins;
167 const struct abx500_function *functions;
168 unsigned nfunctions;
169 const struct abx500_pingroup *groups;
170 unsigned ngroups;
171 struct alternate_functions *alternate_functions;
172 struct abx500_gpio_irq_cluster *gpio_irq_cluster;
173 unsigned ngpio_irq_cluster;
174 int irq_gpio_rising_offset;
175 int irq_gpio_falling_offset;
176 int irq_gpio_factor;
177 };
178
179 #ifdef CONFIG_PINCTRL_AB8500
180
181 void abx500_pinctrl_ab8500_init(struct abx500_pinctrl_soc_data **soc);
182
183 #else
184
185 static inline void
abx500_pinctrl_ab8500_init(struct abx500_pinctrl_soc_data ** soc)186 abx500_pinctrl_ab8500_init(struct abx500_pinctrl_soc_data **soc)
187 {
188 }
189
190 #endif
191
192 #ifdef CONFIG_PINCTRL_AB8505
193
194 void abx500_pinctrl_ab8505_init(struct abx500_pinctrl_soc_data **soc);
195
196 #else
197
198 static inline void
abx500_pinctrl_ab8505_init(struct abx500_pinctrl_soc_data ** soc)199 abx500_pinctrl_ab8505_init(struct abx500_pinctrl_soc_data **soc)
200 {
201 }
202
203 #endif
204
205 #endif /* PINCTRL_PINCTRL_ABx500_H */
206