1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2021 Rafał Miłecki <rafal@milecki.pl> */
3
4 #include <linux/err.h>
5 #include <linux/io.h>
6 #include <linux/mod_devicetable.h>
7 #include <linux/module.h>
8 #include <linux/pinctrl/pinconf-generic.h>
9 #include <linux/pinctrl/pinctrl.h>
10 #include <linux/pinctrl/pinmux.h>
11 #include <linux/platform_device.h>
12 #include <linux/slab.h>
13 #include <linux/string_helpers.h>
14
15 #include "../core.h"
16 #include "../pinmux.h"
17
18 #define BCM4908_NUM_PINS 86
19
20 #define BCM4908_TEST_PORT_BLOCK_EN_LSB 0x00
21 #define BCM4908_TEST_PORT_BLOCK_DATA_MSB 0x04
22 #define BCM4908_TEST_PORT_BLOCK_DATA_LSB 0x08
23 #define BCM4908_TEST_PORT_LSB_PINMUX_DATA_SHIFT 12
24 #define BCM4908_TEST_PORT_COMMAND 0x0c
25 #define BCM4908_TEST_PORT_CMD_LOAD_MUX_REG 0x00000021
26
27 struct bcm4908_pinctrl {
28 struct device *dev;
29 void __iomem *base;
30 struct mutex mutex;
31 struct pinctrl_dev *pctldev;
32 struct pinctrl_desc pctldesc;
33 };
34
35 /*
36 * Groups
37 */
38
39 struct bcm4908_pinctrl_pin_setup {
40 unsigned int number;
41 unsigned int function;
42 };
43
44 static const struct bcm4908_pinctrl_pin_setup led_0_pins_a[] = {
45 { 0, 3 },
46 };
47
48 static const struct bcm4908_pinctrl_pin_setup led_1_pins_a[] = {
49 { 1, 3 },
50 };
51
52 static const struct bcm4908_pinctrl_pin_setup led_2_pins_a[] = {
53 { 2, 3 },
54 };
55
56 static const struct bcm4908_pinctrl_pin_setup led_3_pins_a[] = {
57 { 3, 3 },
58 };
59
60 static const struct bcm4908_pinctrl_pin_setup led_4_pins_a[] = {
61 { 4, 3 },
62 };
63
64 static const struct bcm4908_pinctrl_pin_setup led_5_pins_a[] = {
65 { 5, 3 },
66 };
67
68 static const struct bcm4908_pinctrl_pin_setup led_6_pins_a[] = {
69 { 6, 3 },
70 };
71
72 static const struct bcm4908_pinctrl_pin_setup led_7_pins_a[] = {
73 { 7, 3 },
74 };
75
76 static const struct bcm4908_pinctrl_pin_setup led_8_pins_a[] = {
77 { 8, 3 },
78 };
79
80 static const struct bcm4908_pinctrl_pin_setup led_9_pins_a[] = {
81 { 9, 3 },
82 };
83
84 static const struct bcm4908_pinctrl_pin_setup led_10_pins_a[] = {
85 { 10, 3 },
86 };
87
88 static const struct bcm4908_pinctrl_pin_setup led_11_pins_a[] = {
89 { 11, 3 },
90 };
91
92 static const struct bcm4908_pinctrl_pin_setup led_12_pins_a[] = {
93 { 12, 3 },
94 };
95
96 static const struct bcm4908_pinctrl_pin_setup led_13_pins_a[] = {
97 { 13, 3 },
98 };
99
100 static const struct bcm4908_pinctrl_pin_setup led_14_pins_a[] = {
101 { 14, 3 },
102 };
103
104 static const struct bcm4908_pinctrl_pin_setup led_15_pins_a[] = {
105 { 15, 3 },
106 };
107
108 static const struct bcm4908_pinctrl_pin_setup led_16_pins_a[] = {
109 { 16, 3 },
110 };
111
112 static const struct bcm4908_pinctrl_pin_setup led_17_pins_a[] = {
113 { 17, 3 },
114 };
115
116 static const struct bcm4908_pinctrl_pin_setup led_18_pins_a[] = {
117 { 18, 3 },
118 };
119
120 static const struct bcm4908_pinctrl_pin_setup led_19_pins_a[] = {
121 { 19, 3 },
122 };
123
124 static const struct bcm4908_pinctrl_pin_setup led_20_pins_a[] = {
125 { 20, 3 },
126 };
127
128 static const struct bcm4908_pinctrl_pin_setup led_21_pins_a[] = {
129 { 21, 3 },
130 };
131
132 static const struct bcm4908_pinctrl_pin_setup led_22_pins_a[] = {
133 { 22, 3 },
134 };
135
136 static const struct bcm4908_pinctrl_pin_setup led_23_pins_a[] = {
137 { 23, 3 },
138 };
139
140 static const struct bcm4908_pinctrl_pin_setup led_24_pins_a[] = {
141 { 24, 3 },
142 };
143
144 static const struct bcm4908_pinctrl_pin_setup led_25_pins_a[] = {
145 { 25, 3 },
146 };
147
148 static const struct bcm4908_pinctrl_pin_setup led_26_pins_a[] = {
149 { 26, 3 },
150 };
151
152 static const struct bcm4908_pinctrl_pin_setup led_27_pins_a[] = {
153 { 27, 3 },
154 };
155
156 static const struct bcm4908_pinctrl_pin_setup led_28_pins_a[] = {
157 { 28, 3 },
158 };
159
160 static const struct bcm4908_pinctrl_pin_setup led_29_pins_a[] = {
161 { 29, 3 },
162 };
163
164 static const struct bcm4908_pinctrl_pin_setup led_30_pins_a[] = {
165 { 30, 3 },
166 };
167
168 static const struct bcm4908_pinctrl_pin_setup led_31_pins_a[] = {
169 { 31, 3 },
170 };
171
172 static const struct bcm4908_pinctrl_pin_setup led_10_pins_b[] = {
173 { 8, 2 },
174 };
175
176 static const struct bcm4908_pinctrl_pin_setup led_11_pins_b[] = {
177 { 9, 2 },
178 };
179
180 static const struct bcm4908_pinctrl_pin_setup led_12_pins_b[] = {
181 { 0, 2 },
182 };
183
184 static const struct bcm4908_pinctrl_pin_setup led_13_pins_b[] = {
185 { 1, 2 },
186 };
187
188 static const struct bcm4908_pinctrl_pin_setup led_31_pins_b[] = {
189 { 30, 2 },
190 };
191
192 static const struct bcm4908_pinctrl_pin_setup hs_uart_pins[] = {
193 { 10, 0 }, /* CTS */
194 { 11, 0 }, /* RTS */
195 { 12, 0 }, /* RXD */
196 { 13, 0 }, /* TXD */
197 };
198
199 static const struct bcm4908_pinctrl_pin_setup i2c_pins_a[] = {
200 { 18, 0 }, /* SDA */
201 { 19, 0 }, /* SCL */
202 };
203
204 static const struct bcm4908_pinctrl_pin_setup i2c_pins_b[] = {
205 { 22, 0 }, /* SDA */
206 { 23, 0 }, /* SCL */
207 };
208
209 static const struct bcm4908_pinctrl_pin_setup i2s_pins[] = {
210 { 27, 0 }, /* MCLK */
211 { 28, 0 }, /* LRCK */
212 { 29, 0 }, /* SDATA */
213 { 30, 0 }, /* SCLK */
214 };
215
216 static const struct bcm4908_pinctrl_pin_setup nand_ctrl_pins[] = {
217 { 32, 0 },
218 { 33, 0 },
219 { 34, 0 },
220 { 43, 0 },
221 { 44, 0 },
222 { 45, 0 },
223 { 56, 1 },
224 };
225
226 static const struct bcm4908_pinctrl_pin_setup nand_data_pins[] = {
227 { 35, 0 },
228 { 36, 0 },
229 { 37, 0 },
230 { 38, 0 },
231 { 39, 0 },
232 { 40, 0 },
233 { 41, 0 },
234 { 42, 0 },
235 };
236
237 static const struct bcm4908_pinctrl_pin_setup emmc_ctrl_pins[] = {
238 { 46, 0 },
239 { 47, 0 },
240 };
241
242 static const struct bcm4908_pinctrl_pin_setup usb0_pwr_pins[] = {
243 { 63, 0 },
244 { 64, 0 },
245 };
246
247 static const struct bcm4908_pinctrl_pin_setup usb1_pwr_pins[] = {
248 { 66, 0 },
249 { 67, 0 },
250 };
251
252 struct bcm4908_pinctrl_grp {
253 const char *name;
254 const struct bcm4908_pinctrl_pin_setup *pins;
255 const unsigned int num_pins;
256 };
257
258 static const struct bcm4908_pinctrl_grp bcm4908_pinctrl_grps[] = {
259 { "led_0_grp_a", led_0_pins_a, ARRAY_SIZE(led_0_pins_a) },
260 { "led_1_grp_a", led_1_pins_a, ARRAY_SIZE(led_1_pins_a) },
261 { "led_2_grp_a", led_2_pins_a, ARRAY_SIZE(led_2_pins_a) },
262 { "led_3_grp_a", led_3_pins_a, ARRAY_SIZE(led_3_pins_a) },
263 { "led_4_grp_a", led_4_pins_a, ARRAY_SIZE(led_4_pins_a) },
264 { "led_5_grp_a", led_5_pins_a, ARRAY_SIZE(led_5_pins_a) },
265 { "led_6_grp_a", led_6_pins_a, ARRAY_SIZE(led_6_pins_a) },
266 { "led_7_grp_a", led_7_pins_a, ARRAY_SIZE(led_7_pins_a) },
267 { "led_8_grp_a", led_8_pins_a, ARRAY_SIZE(led_8_pins_a) },
268 { "led_9_grp_a", led_9_pins_a, ARRAY_SIZE(led_9_pins_a) },
269 { "led_10_grp_a", led_10_pins_a, ARRAY_SIZE(led_10_pins_a) },
270 { "led_11_grp_a", led_11_pins_a, ARRAY_SIZE(led_11_pins_a) },
271 { "led_12_grp_a", led_12_pins_a, ARRAY_SIZE(led_12_pins_a) },
272 { "led_13_grp_a", led_13_pins_a, ARRAY_SIZE(led_13_pins_a) },
273 { "led_14_grp_a", led_14_pins_a, ARRAY_SIZE(led_14_pins_a) },
274 { "led_15_grp_a", led_15_pins_a, ARRAY_SIZE(led_15_pins_a) },
275 { "led_16_grp_a", led_16_pins_a, ARRAY_SIZE(led_16_pins_a) },
276 { "led_17_grp_a", led_17_pins_a, ARRAY_SIZE(led_17_pins_a) },
277 { "led_18_grp_a", led_18_pins_a, ARRAY_SIZE(led_18_pins_a) },
278 { "led_19_grp_a", led_19_pins_a, ARRAY_SIZE(led_19_pins_a) },
279 { "led_20_grp_a", led_20_pins_a, ARRAY_SIZE(led_20_pins_a) },
280 { "led_21_grp_a", led_21_pins_a, ARRAY_SIZE(led_21_pins_a) },
281 { "led_22_grp_a", led_22_pins_a, ARRAY_SIZE(led_22_pins_a) },
282 { "led_23_grp_a", led_23_pins_a, ARRAY_SIZE(led_23_pins_a) },
283 { "led_24_grp_a", led_24_pins_a, ARRAY_SIZE(led_24_pins_a) },
284 { "led_25_grp_a", led_25_pins_a, ARRAY_SIZE(led_25_pins_a) },
285 { "led_26_grp_a", led_26_pins_a, ARRAY_SIZE(led_26_pins_a) },
286 { "led_27_grp_a", led_27_pins_a, ARRAY_SIZE(led_27_pins_a) },
287 { "led_28_grp_a", led_28_pins_a, ARRAY_SIZE(led_28_pins_a) },
288 { "led_29_grp_a", led_29_pins_a, ARRAY_SIZE(led_29_pins_a) },
289 { "led_30_grp_a", led_30_pins_a, ARRAY_SIZE(led_30_pins_a) },
290 { "led_31_grp_a", led_31_pins_a, ARRAY_SIZE(led_31_pins_a) },
291 { "led_10_grp_b", led_10_pins_b, ARRAY_SIZE(led_10_pins_b) },
292 { "led_11_grp_b", led_11_pins_b, ARRAY_SIZE(led_11_pins_b) },
293 { "led_12_grp_b", led_12_pins_b, ARRAY_SIZE(led_12_pins_b) },
294 { "led_13_grp_b", led_13_pins_b, ARRAY_SIZE(led_13_pins_b) },
295 { "led_31_grp_b", led_31_pins_b, ARRAY_SIZE(led_31_pins_b) },
296 { "hs_uart_grp", hs_uart_pins, ARRAY_SIZE(hs_uart_pins) },
297 { "i2c_grp_a", i2c_pins_a, ARRAY_SIZE(i2c_pins_a) },
298 { "i2c_grp_b", i2c_pins_b, ARRAY_SIZE(i2c_pins_b) },
299 { "i2s_grp", i2s_pins, ARRAY_SIZE(i2s_pins) },
300 { "nand_ctrl_grp", nand_ctrl_pins, ARRAY_SIZE(nand_ctrl_pins) },
301 { "nand_data_grp", nand_data_pins, ARRAY_SIZE(nand_data_pins) },
302 { "emmc_ctrl_grp", emmc_ctrl_pins, ARRAY_SIZE(emmc_ctrl_pins) },
303 { "usb0_pwr_grp", usb0_pwr_pins, ARRAY_SIZE(usb0_pwr_pins) },
304 { "usb1_pwr_grp", usb1_pwr_pins, ARRAY_SIZE(usb1_pwr_pins) },
305 };
306
307 /*
308 * Functions
309 */
310
311 struct bcm4908_pinctrl_function {
312 const char *name;
313 const char * const *groups;
314 const unsigned int num_groups;
315 };
316
317 static const char * const led_0_groups[] = { "led_0_grp_a" };
318 static const char * const led_1_groups[] = { "led_1_grp_a" };
319 static const char * const led_2_groups[] = { "led_2_grp_a" };
320 static const char * const led_3_groups[] = { "led_3_grp_a" };
321 static const char * const led_4_groups[] = { "led_4_grp_a" };
322 static const char * const led_5_groups[] = { "led_5_grp_a" };
323 static const char * const led_6_groups[] = { "led_6_grp_a" };
324 static const char * const led_7_groups[] = { "led_7_grp_a" };
325 static const char * const led_8_groups[] = { "led_8_grp_a" };
326 static const char * const led_9_groups[] = { "led_9_grp_a" };
327 static const char * const led_10_groups[] = { "led_10_grp_a", "led_10_grp_b" };
328 static const char * const led_11_groups[] = { "led_11_grp_a", "led_11_grp_b" };
329 static const char * const led_12_groups[] = { "led_12_grp_a", "led_12_grp_b" };
330 static const char * const led_13_groups[] = { "led_13_grp_a", "led_13_grp_b" };
331 static const char * const led_14_groups[] = { "led_14_grp_a" };
332 static const char * const led_15_groups[] = { "led_15_grp_a" };
333 static const char * const led_16_groups[] = { "led_16_grp_a" };
334 static const char * const led_17_groups[] = { "led_17_grp_a" };
335 static const char * const led_18_groups[] = { "led_18_grp_a" };
336 static const char * const led_19_groups[] = { "led_19_grp_a" };
337 static const char * const led_20_groups[] = { "led_20_grp_a" };
338 static const char * const led_21_groups[] = { "led_21_grp_a" };
339 static const char * const led_22_groups[] = { "led_22_grp_a" };
340 static const char * const led_23_groups[] = { "led_23_grp_a" };
341 static const char * const led_24_groups[] = { "led_24_grp_a" };
342 static const char * const led_25_groups[] = { "led_25_grp_a" };
343 static const char * const led_26_groups[] = { "led_26_grp_a" };
344 static const char * const led_27_groups[] = { "led_27_grp_a" };
345 static const char * const led_28_groups[] = { "led_28_grp_a" };
346 static const char * const led_29_groups[] = { "led_29_grp_a" };
347 static const char * const led_30_groups[] = { "led_30_grp_a" };
348 static const char * const led_31_groups[] = { "led_31_grp_a", "led_31_grp_b" };
349 static const char * const hs_uart_groups[] = { "hs_uart_grp" };
350 static const char * const i2c_groups[] = { "i2c_grp_a", "i2c_grp_b" };
351 static const char * const i2s_groups[] = { "i2s_grp" };
352 static const char * const nand_ctrl_groups[] = { "nand_ctrl_grp" };
353 static const char * const nand_data_groups[] = { "nand_data_grp" };
354 static const char * const emmc_ctrl_groups[] = { "emmc_ctrl_grp" };
355 static const char * const usb0_pwr_groups[] = { "usb0_pwr_grp" };
356 static const char * const usb1_pwr_groups[] = { "usb1_pwr_grp" };
357
358 static const struct bcm4908_pinctrl_function bcm4908_pinctrl_functions[] = {
359 { "led_0", led_0_groups, ARRAY_SIZE(led_0_groups) },
360 { "led_1", led_1_groups, ARRAY_SIZE(led_1_groups) },
361 { "led_2", led_2_groups, ARRAY_SIZE(led_2_groups) },
362 { "led_3", led_3_groups, ARRAY_SIZE(led_3_groups) },
363 { "led_4", led_4_groups, ARRAY_SIZE(led_4_groups) },
364 { "led_5", led_5_groups, ARRAY_SIZE(led_5_groups) },
365 { "led_6", led_6_groups, ARRAY_SIZE(led_6_groups) },
366 { "led_7", led_7_groups, ARRAY_SIZE(led_7_groups) },
367 { "led_8", led_8_groups, ARRAY_SIZE(led_8_groups) },
368 { "led_9", led_9_groups, ARRAY_SIZE(led_9_groups) },
369 { "led_10", led_10_groups, ARRAY_SIZE(led_10_groups) },
370 { "led_11", led_11_groups, ARRAY_SIZE(led_11_groups) },
371 { "led_12", led_12_groups, ARRAY_SIZE(led_12_groups) },
372 { "led_13", led_13_groups, ARRAY_SIZE(led_13_groups) },
373 { "led_14", led_14_groups, ARRAY_SIZE(led_14_groups) },
374 { "led_15", led_15_groups, ARRAY_SIZE(led_15_groups) },
375 { "led_16", led_16_groups, ARRAY_SIZE(led_16_groups) },
376 { "led_17", led_17_groups, ARRAY_SIZE(led_17_groups) },
377 { "led_18", led_18_groups, ARRAY_SIZE(led_18_groups) },
378 { "led_19", led_19_groups, ARRAY_SIZE(led_19_groups) },
379 { "led_20", led_20_groups, ARRAY_SIZE(led_20_groups) },
380 { "led_21", led_21_groups, ARRAY_SIZE(led_21_groups) },
381 { "led_22", led_22_groups, ARRAY_SIZE(led_22_groups) },
382 { "led_23", led_23_groups, ARRAY_SIZE(led_23_groups) },
383 { "led_24", led_24_groups, ARRAY_SIZE(led_24_groups) },
384 { "led_25", led_25_groups, ARRAY_SIZE(led_25_groups) },
385 { "led_26", led_26_groups, ARRAY_SIZE(led_26_groups) },
386 { "led_27", led_27_groups, ARRAY_SIZE(led_27_groups) },
387 { "led_28", led_28_groups, ARRAY_SIZE(led_28_groups) },
388 { "led_29", led_29_groups, ARRAY_SIZE(led_29_groups) },
389 { "led_30", led_30_groups, ARRAY_SIZE(led_30_groups) },
390 { "led_31", led_31_groups, ARRAY_SIZE(led_31_groups) },
391 { "hs_uart", hs_uart_groups, ARRAY_SIZE(hs_uart_groups) },
392 { "i2c", i2c_groups, ARRAY_SIZE(i2c_groups) },
393 { "i2s", i2s_groups, ARRAY_SIZE(i2s_groups) },
394 { "nand_ctrl", nand_ctrl_groups, ARRAY_SIZE(nand_ctrl_groups) },
395 { "nand_data", nand_data_groups, ARRAY_SIZE(nand_data_groups) },
396 { "emmc_ctrl", emmc_ctrl_groups, ARRAY_SIZE(emmc_ctrl_groups) },
397 { "usb0_pwr", usb0_pwr_groups, ARRAY_SIZE(usb0_pwr_groups) },
398 { "usb1_pwr", usb1_pwr_groups, ARRAY_SIZE(usb1_pwr_groups) },
399 };
400
401 /*
402 * Groups code
403 */
404
405 static const struct pinctrl_ops bcm4908_pinctrl_ops = {
406 .get_groups_count = pinctrl_generic_get_group_count,
407 .get_group_name = pinctrl_generic_get_group_name,
408 .get_group_pins = pinctrl_generic_get_group_pins,
409 .dt_node_to_map = pinconf_generic_dt_node_to_map_group,
410 .dt_free_map = pinconf_generic_dt_free_map,
411 };
412
413 /*
414 * Functions code
415 */
416
bcm4908_pinctrl_set_mux(struct pinctrl_dev * pctrl_dev,unsigned int func_selector,unsigned int group_selector)417 static int bcm4908_pinctrl_set_mux(struct pinctrl_dev *pctrl_dev,
418 unsigned int func_selector,
419 unsigned int group_selector)
420 {
421 struct bcm4908_pinctrl *bcm4908_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
422 const struct bcm4908_pinctrl_grp *group;
423 struct group_desc *group_desc;
424 int i;
425
426 group_desc = pinctrl_generic_get_group(pctrl_dev, group_selector);
427 if (!group_desc)
428 return -EINVAL;
429 group = group_desc->data;
430
431 mutex_lock(&bcm4908_pinctrl->mutex);
432 for (i = 0; i < group->num_pins; i++) {
433 u32 lsb = 0;
434
435 lsb |= group->pins[i].number;
436 lsb |= group->pins[i].function << BCM4908_TEST_PORT_LSB_PINMUX_DATA_SHIFT;
437
438 writel(0x0, bcm4908_pinctrl->base + BCM4908_TEST_PORT_BLOCK_DATA_MSB);
439 writel(lsb, bcm4908_pinctrl->base + BCM4908_TEST_PORT_BLOCK_DATA_LSB);
440 writel(BCM4908_TEST_PORT_CMD_LOAD_MUX_REG,
441 bcm4908_pinctrl->base + BCM4908_TEST_PORT_COMMAND);
442 }
443 mutex_unlock(&bcm4908_pinctrl->mutex);
444
445 return 0;
446 }
447
448 static const struct pinmux_ops bcm4908_pinctrl_pmxops = {
449 .get_functions_count = pinmux_generic_get_function_count,
450 .get_function_name = pinmux_generic_get_function_name,
451 .get_function_groups = pinmux_generic_get_function_groups,
452 .set_mux = bcm4908_pinctrl_set_mux,
453 };
454
455 /*
456 * Controller code
457 */
458
459 static struct pinctrl_desc bcm4908_pinctrl_desc = {
460 .name = "bcm4908-pinctrl",
461 .pctlops = &bcm4908_pinctrl_ops,
462 .pmxops = &bcm4908_pinctrl_pmxops,
463 };
464
465 static const struct of_device_id bcm4908_pinctrl_of_match_table[] = {
466 { .compatible = "brcm,bcm4908-pinctrl", },
467 { }
468 };
469
bcm4908_pinctrl_probe(struct platform_device * pdev)470 static int bcm4908_pinctrl_probe(struct platform_device *pdev)
471 {
472 struct device *dev = &pdev->dev;
473 struct bcm4908_pinctrl *bcm4908_pinctrl;
474 struct pinctrl_desc *pctldesc;
475 struct pinctrl_pin_desc *pins;
476 char **pin_names;
477 int i;
478
479 bcm4908_pinctrl = devm_kzalloc(dev, sizeof(*bcm4908_pinctrl), GFP_KERNEL);
480 if (!bcm4908_pinctrl)
481 return -ENOMEM;
482 pctldesc = &bcm4908_pinctrl->pctldesc;
483 platform_set_drvdata(pdev, bcm4908_pinctrl);
484
485 /* Set basic properties */
486
487 bcm4908_pinctrl->dev = dev;
488
489 bcm4908_pinctrl->base = devm_platform_ioremap_resource(pdev, 0);
490 if (IS_ERR(bcm4908_pinctrl->base))
491 return PTR_ERR(bcm4908_pinctrl->base);
492
493 mutex_init(&bcm4908_pinctrl->mutex);
494
495 memcpy(pctldesc, &bcm4908_pinctrl_desc, sizeof(*pctldesc));
496
497 /* Set pinctrl properties */
498
499 pin_names = devm_kasprintf_strarray(dev, "pin", BCM4908_NUM_PINS);
500 if (IS_ERR(pin_names))
501 return PTR_ERR(pin_names);
502
503 pins = devm_kcalloc(dev, BCM4908_NUM_PINS, sizeof(*pins), GFP_KERNEL);
504 if (!pins)
505 return -ENOMEM;
506 for (i = 0; i < BCM4908_NUM_PINS; i++) {
507 pins[i].number = i;
508 pins[i].name = pin_names[i];
509 }
510 pctldesc->pins = pins;
511 pctldesc->npins = BCM4908_NUM_PINS;
512
513 /* Register */
514
515 bcm4908_pinctrl->pctldev = devm_pinctrl_register(dev, pctldesc, bcm4908_pinctrl);
516 if (IS_ERR(bcm4908_pinctrl->pctldev))
517 return dev_err_probe(dev, PTR_ERR(bcm4908_pinctrl->pctldev),
518 "Failed to register pinctrl\n");
519
520 /* Groups */
521
522 for (i = 0; i < ARRAY_SIZE(bcm4908_pinctrl_grps); i++) {
523 const struct bcm4908_pinctrl_grp *group = &bcm4908_pinctrl_grps[i];
524 int *pins;
525 int j;
526
527 pins = devm_kcalloc(dev, group->num_pins, sizeof(*pins), GFP_KERNEL);
528 if (!pins)
529 return -ENOMEM;
530 for (j = 0; j < group->num_pins; j++)
531 pins[j] = group->pins[j].number;
532
533 pinctrl_generic_add_group(bcm4908_pinctrl->pctldev, group->name,
534 pins, group->num_pins, (void *)group);
535 }
536
537 /* Functions */
538
539 for (i = 0; i < ARRAY_SIZE(bcm4908_pinctrl_functions); i++) {
540 const struct bcm4908_pinctrl_function *function = &bcm4908_pinctrl_functions[i];
541
542 pinmux_generic_add_function(bcm4908_pinctrl->pctldev,
543 function->name,
544 function->groups,
545 function->num_groups, NULL);
546 }
547
548 return 0;
549 }
550
551 static struct platform_driver bcm4908_pinctrl_driver = {
552 .probe = bcm4908_pinctrl_probe,
553 .driver = {
554 .name = "bcm4908-pinctrl",
555 .of_match_table = bcm4908_pinctrl_of_match_table,
556 },
557 };
558
559 module_platform_driver(bcm4908_pinctrl_driver);
560
561 MODULE_AUTHOR("Rafał Miłecki");
562 MODULE_DESCRIPTION("Broadcom BCM4908 pinmux driver");
563 MODULE_LICENSE("GPL v2");
564 MODULE_DEVICE_TABLE(of, bcm4908_pinctrl_of_match_table);
565