Commit | Line | Data |
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2ec1d359 AR |
1 | /* |
2 | * Generic GPIO driver for logic cells found in the Nomadik SoC | |
3 | * | |
4 | * Copyright (C) 2008,2009 STMicroelectronics | |
5 | * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it> | |
6 | * Rewritten based on work by Prafulla WADASKAR <prafulla.wadaskar@st.com> | |
33d78647 | 7 | * Copyright (C) 2011 Linus Walleij <linus.walleij@linaro.org> |
2ec1d359 AR |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/device.h> | |
3e3c62ca | 17 | #include <linux/platform_device.h> |
2ec1d359 | 18 | #include <linux/io.h> |
af7dc228 RV |
19 | #include <linux/clk.h> |
20 | #include <linux/err.h> | |
2ec1d359 AR |
21 | #include <linux/gpio.h> |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/irq.h> | |
a60b57ed | 25 | #include <linux/irqdomain.h> |
5a0e3ad6 | 26 | #include <linux/slab.h> |
855f80cd | 27 | #include <linux/of_device.h> |
e98ea774 | 28 | #include <linux/pinctrl/pinctrl.h> |
dbfe8ca2 | 29 | #include <linux/pinctrl/pinmux.h> |
d41af627 | 30 | #include <linux/pinctrl/pinconf.h> |
dbfe8ca2 LW |
31 | /* Since we request GPIOs from ourself */ |
32 | #include <linux/pinctrl/consumer.h> | |
b7213702 LW |
33 | /* |
34 | * For the U8500 archs, use the PRCMU register interface, for the older | |
35 | * Nomadik, provide some stubs. The functions using these will only be | |
36 | * called on the U8500 series. | |
37 | */ | |
38 | #ifdef CONFIG_ARCH_U8500 | |
c22df08c | 39 | #include <linux/mfd/dbx500-prcmu.h> |
b7213702 LW |
40 | #else |
41 | static inline u32 prcmu_read(unsigned int reg) { | |
42 | return 0; | |
43 | } | |
44 | static inline void prcmu_write(unsigned int reg, u32 value) {} | |
45 | static inline void prcmu_write_masked(unsigned int reg, u32 mask, u32 value) {} | |
46 | #endif | |
2ec1d359 | 47 | |
adfed159 WD |
48 | #include <asm/mach/irq.h> |
49 | ||
378be066 | 50 | #include <plat/pincfg.h> |
0f332861 | 51 | #include <plat/gpio-nomadik.h> |
2ec1d359 | 52 | |
e98ea774 LW |
53 | #include "pinctrl-nomadik.h" |
54 | ||
2ec1d359 AR |
55 | /* |
56 | * The GPIO module in the Nomadik family of Systems-on-Chip is an | |
57 | * AMBA device, managing 32 pins and alternate functions. The logic block | |
9c66ee6f | 58 | * is currently used in the Nomadik and ux500. |
2ec1d359 AR |
59 | * |
60 | * Symbols in this file are called "nmk_gpio" for "nomadik gpio" | |
61 | */ | |
62 | ||
2ec1d359 AR |
63 | struct nmk_gpio_chip { |
64 | struct gpio_chip chip; | |
a60b57ed | 65 | struct irq_domain *domain; |
2ec1d359 | 66 | void __iomem *addr; |
af7dc228 | 67 | struct clk *clk; |
33b744b3 | 68 | unsigned int bank; |
2ec1d359 | 69 | unsigned int parent_irq; |
2c8bb0eb | 70 | int secondary_parent_irq; |
33b744b3 | 71 | u32 (*get_secondary_status)(unsigned int bank); |
01727e61 | 72 | void (*set_ioforce)(bool enable); |
c0fcb8db | 73 | spinlock_t lock; |
33d78647 | 74 | bool sleepmode; |
2ec1d359 AR |
75 | /* Keep track of configured edges */ |
76 | u32 edge_rising; | |
77 | u32 edge_falling; | |
b9df468d RV |
78 | u32 real_wake; |
79 | u32 rwimsc; | |
80 | u32 fwimsc; | |
6c12fe88 RV |
81 | u32 rimsc; |
82 | u32 fimsc; | |
bc6f5cf6 | 83 | u32 pull_up; |
ebc6178d | 84 | u32 lowemi; |
2ec1d359 AR |
85 | }; |
86 | ||
e98ea774 LW |
87 | struct nmk_pinctrl { |
88 | struct device *dev; | |
89 | struct pinctrl_dev *pctl; | |
90 | const struct nmk_pinctrl_soc_data *soc; | |
91 | }; | |
92 | ||
01727e61 RV |
93 | static struct nmk_gpio_chip * |
94 | nmk_gpio_chips[DIV_ROUND_UP(ARCH_NR_GPIOS, NMK_GPIO_PER_CHIP)]; | |
95 | ||
96 | static DEFINE_SPINLOCK(nmk_gpio_slpm_lock); | |
97 | ||
98 | #define NUM_BANKS ARRAY_SIZE(nmk_gpio_chips) | |
99 | ||
6f9a974c RV |
100 | static void __nmk_gpio_set_mode(struct nmk_gpio_chip *nmk_chip, |
101 | unsigned offset, int gpio_mode) | |
102 | { | |
103 | u32 bit = 1 << offset; | |
104 | u32 afunc, bfunc; | |
105 | ||
106 | afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & ~bit; | |
107 | bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & ~bit; | |
108 | if (gpio_mode & NMK_GPIO_ALT_A) | |
109 | afunc |= bit; | |
110 | if (gpio_mode & NMK_GPIO_ALT_B) | |
111 | bfunc |= bit; | |
112 | writel(afunc, nmk_chip->addr + NMK_GPIO_AFSLA); | |
113 | writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB); | |
114 | } | |
115 | ||
81a3c298 RV |
116 | static void __nmk_gpio_set_slpm(struct nmk_gpio_chip *nmk_chip, |
117 | unsigned offset, enum nmk_gpio_slpm mode) | |
118 | { | |
119 | u32 bit = 1 << offset; | |
120 | u32 slpm; | |
121 | ||
122 | slpm = readl(nmk_chip->addr + NMK_GPIO_SLPC); | |
123 | if (mode == NMK_GPIO_SLPM_NOCHANGE) | |
124 | slpm |= bit; | |
125 | else | |
126 | slpm &= ~bit; | |
127 | writel(slpm, nmk_chip->addr + NMK_GPIO_SLPC); | |
128 | } | |
129 | ||
5b327edf RV |
130 | static void __nmk_gpio_set_pull(struct nmk_gpio_chip *nmk_chip, |
131 | unsigned offset, enum nmk_gpio_pull pull) | |
132 | { | |
133 | u32 bit = 1 << offset; | |
134 | u32 pdis; | |
135 | ||
136 | pdis = readl(nmk_chip->addr + NMK_GPIO_PDIS); | |
bc6f5cf6 | 137 | if (pull == NMK_GPIO_PULL_NONE) { |
5b327edf | 138 | pdis |= bit; |
bc6f5cf6 RA |
139 | nmk_chip->pull_up &= ~bit; |
140 | } else { | |
5b327edf | 141 | pdis &= ~bit; |
bc6f5cf6 RA |
142 | } |
143 | ||
5b327edf RV |
144 | writel(pdis, nmk_chip->addr + NMK_GPIO_PDIS); |
145 | ||
bc6f5cf6 RA |
146 | if (pull == NMK_GPIO_PULL_UP) { |
147 | nmk_chip->pull_up |= bit; | |
5b327edf | 148 | writel(bit, nmk_chip->addr + NMK_GPIO_DATS); |
bc6f5cf6 RA |
149 | } else if (pull == NMK_GPIO_PULL_DOWN) { |
150 | nmk_chip->pull_up &= ~bit; | |
5b327edf | 151 | writel(bit, nmk_chip->addr + NMK_GPIO_DATC); |
bc6f5cf6 | 152 | } |
5b327edf RV |
153 | } |
154 | ||
ebc6178d RV |
155 | static void __nmk_gpio_set_lowemi(struct nmk_gpio_chip *nmk_chip, |
156 | unsigned offset, bool lowemi) | |
157 | { | |
158 | u32 bit = BIT(offset); | |
159 | bool enabled = nmk_chip->lowemi & bit; | |
160 | ||
161 | if (lowemi == enabled) | |
162 | return; | |
163 | ||
164 | if (lowemi) | |
165 | nmk_chip->lowemi |= bit; | |
166 | else | |
167 | nmk_chip->lowemi &= ~bit; | |
168 | ||
169 | writel_relaxed(nmk_chip->lowemi, | |
170 | nmk_chip->addr + NMK_GPIO_LOWEMI); | |
171 | } | |
172 | ||
378be066 RV |
173 | static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip, |
174 | unsigned offset) | |
175 | { | |
176 | writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC); | |
177 | } | |
178 | ||
6720db7c RV |
179 | static void __nmk_gpio_set_output(struct nmk_gpio_chip *nmk_chip, |
180 | unsigned offset, int val) | |
181 | { | |
182 | if (val) | |
183 | writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATS); | |
184 | else | |
185 | writel(1 << offset, nmk_chip->addr + NMK_GPIO_DATC); | |
186 | } | |
187 | ||
188 | static void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip, | |
189 | unsigned offset, int val) | |
190 | { | |
191 | writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRS); | |
192 | __nmk_gpio_set_output(nmk_chip, offset, val); | |
193 | } | |
194 | ||
01727e61 RV |
195 | static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip, |
196 | unsigned offset, int gpio_mode, | |
197 | bool glitch) | |
198 | { | |
6c12fe88 RV |
199 | u32 rwimsc = nmk_chip->rwimsc; |
200 | u32 fwimsc = nmk_chip->fwimsc; | |
01727e61 RV |
201 | |
202 | if (glitch && nmk_chip->set_ioforce) { | |
203 | u32 bit = BIT(offset); | |
204 | ||
01727e61 RV |
205 | /* Prevent spurious wakeups */ |
206 | writel(rwimsc & ~bit, nmk_chip->addr + NMK_GPIO_RWIMSC); | |
207 | writel(fwimsc & ~bit, nmk_chip->addr + NMK_GPIO_FWIMSC); | |
208 | ||
209 | nmk_chip->set_ioforce(true); | |
210 | } | |
211 | ||
212 | __nmk_gpio_set_mode(nmk_chip, offset, gpio_mode); | |
213 | ||
214 | if (glitch && nmk_chip->set_ioforce) { | |
215 | nmk_chip->set_ioforce(false); | |
216 | ||
217 | writel(rwimsc, nmk_chip->addr + NMK_GPIO_RWIMSC); | |
218 | writel(fwimsc, nmk_chip->addr + NMK_GPIO_FWIMSC); | |
219 | } | |
220 | } | |
221 | ||
6c42ad1c RV |
222 | static void |
223 | nmk_gpio_disable_lazy_irq(struct nmk_gpio_chip *nmk_chip, unsigned offset) | |
224 | { | |
225 | u32 falling = nmk_chip->fimsc & BIT(offset); | |
226 | u32 rising = nmk_chip->rimsc & BIT(offset); | |
227 | int gpio = nmk_chip->chip.base + offset; | |
228 | int irq = NOMADIK_GPIO_TO_IRQ(gpio); | |
229 | struct irq_data *d = irq_get_irq_data(irq); | |
230 | ||
231 | if (!rising && !falling) | |
232 | return; | |
233 | ||
234 | if (!d || !irqd_irq_disabled(d)) | |
235 | return; | |
236 | ||
237 | if (rising) { | |
238 | nmk_chip->rimsc &= ~BIT(offset); | |
239 | writel_relaxed(nmk_chip->rimsc, | |
240 | nmk_chip->addr + NMK_GPIO_RIMSC); | |
241 | } | |
242 | ||
243 | if (falling) { | |
244 | nmk_chip->fimsc &= ~BIT(offset); | |
245 | writel_relaxed(nmk_chip->fimsc, | |
246 | nmk_chip->addr + NMK_GPIO_FIMSC); | |
247 | } | |
248 | ||
249 | dev_dbg(nmk_chip->chip.dev, "%d: clearing interrupt mask\n", gpio); | |
250 | } | |
251 | ||
c22df08c JNG |
252 | static void nmk_prcm_altcx_set_mode(struct nmk_pinctrl *npct, |
253 | unsigned offset, unsigned alt_num) | |
254 | { | |
255 | int i; | |
256 | u16 reg; | |
257 | u8 bit; | |
258 | u8 alt_index; | |
259 | const struct prcm_gpiocr_altcx_pin_desc *pin_desc; | |
260 | const u16 *gpiocr_regs; | |
261 | ||
262 | if (alt_num > PRCM_IDX_GPIOCR_ALTC_MAX) { | |
263 | dev_err(npct->dev, "PRCM GPIOCR: alternate-C%i is invalid\n", | |
264 | alt_num); | |
265 | return; | |
266 | } | |
267 | ||
268 | for (i = 0 ; i < npct->soc->npins_altcx ; i++) { | |
269 | if (npct->soc->altcx_pins[i].pin == offset) | |
270 | break; | |
271 | } | |
272 | if (i == npct->soc->npins_altcx) { | |
273 | dev_dbg(npct->dev, "PRCM GPIOCR: pin %i is not found\n", | |
274 | offset); | |
275 | return; | |
276 | } | |
277 | ||
278 | pin_desc = npct->soc->altcx_pins + i; | |
279 | gpiocr_regs = npct->soc->prcm_gpiocr_registers; | |
280 | ||
281 | /* | |
282 | * If alt_num is NULL, just clear current ALTCx selection | |
283 | * to make sure we come back to a pure ALTC selection | |
284 | */ | |
285 | if (!alt_num) { | |
286 | for (i = 0 ; i < PRCM_IDX_GPIOCR_ALTC_MAX ; i++) { | |
287 | if (pin_desc->altcx[i].used == true) { | |
288 | reg = gpiocr_regs[pin_desc->altcx[i].reg_index]; | |
289 | bit = pin_desc->altcx[i].control_bit; | |
290 | if (prcmu_read(reg) & BIT(bit)) { | |
291 | prcmu_write_masked(reg, BIT(bit), 0); | |
292 | dev_dbg(npct->dev, | |
293 | "PRCM GPIOCR: pin %i: alternate-C%i has been disabled\n", | |
294 | offset, i+1); | |
295 | } | |
296 | } | |
297 | } | |
298 | return; | |
299 | } | |
300 | ||
301 | alt_index = alt_num - 1; | |
302 | if (pin_desc->altcx[alt_index].used == false) { | |
303 | dev_warn(npct->dev, | |
304 | "PRCM GPIOCR: pin %i: alternate-C%i does not exist\n", | |
305 | offset, alt_num); | |
306 | return; | |
307 | } | |
308 | ||
309 | /* | |
310 | * Check if any other ALTCx functions are activated on this pin | |
311 | * and disable it first. | |
312 | */ | |
313 | for (i = 0 ; i < PRCM_IDX_GPIOCR_ALTC_MAX ; i++) { | |
314 | if (i == alt_index) | |
315 | continue; | |
316 | if (pin_desc->altcx[i].used == true) { | |
317 | reg = gpiocr_regs[pin_desc->altcx[i].reg_index]; | |
318 | bit = pin_desc->altcx[i].control_bit; | |
319 | if (prcmu_read(reg) & BIT(bit)) { | |
320 | prcmu_write_masked(reg, BIT(bit), 0); | |
321 | dev_dbg(npct->dev, | |
322 | "PRCM GPIOCR: pin %i: alternate-C%i has been disabled\n", | |
323 | offset, i+1); | |
324 | } | |
325 | } | |
326 | } | |
327 | ||
328 | reg = gpiocr_regs[pin_desc->altcx[alt_index].reg_index]; | |
329 | bit = pin_desc->altcx[alt_index].control_bit; | |
330 | dev_dbg(npct->dev, "PRCM GPIOCR: pin %i: alternate-C%i has been selected\n", | |
331 | offset, alt_index+1); | |
332 | prcmu_write_masked(reg, BIT(bit), BIT(bit)); | |
333 | } | |
334 | ||
378be066 | 335 | static void __nmk_config_pin(struct nmk_gpio_chip *nmk_chip, unsigned offset, |
01727e61 | 336 | pin_cfg_t cfg, bool sleep, unsigned int *slpmregs) |
378be066 RV |
337 | { |
338 | static const char *afnames[] = { | |
339 | [NMK_GPIO_ALT_GPIO] = "GPIO", | |
340 | [NMK_GPIO_ALT_A] = "A", | |
341 | [NMK_GPIO_ALT_B] = "B", | |
342 | [NMK_GPIO_ALT_C] = "C" | |
343 | }; | |
344 | static const char *pullnames[] = { | |
345 | [NMK_GPIO_PULL_NONE] = "none", | |
346 | [NMK_GPIO_PULL_UP] = "up", | |
347 | [NMK_GPIO_PULL_DOWN] = "down", | |
348 | [3] /* illegal */ = "??" | |
349 | }; | |
350 | static const char *slpmnames[] = { | |
7e3f7e59 RV |
351 | [NMK_GPIO_SLPM_INPUT] = "input/wakeup", |
352 | [NMK_GPIO_SLPM_NOCHANGE] = "no-change/no-wakeup", | |
378be066 RV |
353 | }; |
354 | ||
355 | int pin = PIN_NUM(cfg); | |
356 | int pull = PIN_PULL(cfg); | |
357 | int af = PIN_ALT(cfg); | |
358 | int slpm = PIN_SLPM(cfg); | |
6720db7c RV |
359 | int output = PIN_DIR(cfg); |
360 | int val = PIN_VAL(cfg); | |
01727e61 | 361 | bool glitch = af == NMK_GPIO_ALT_C; |
378be066 | 362 | |
dacdc96c RV |
363 | dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: af %s, pull %s, slpm %s (%s%s)\n", |
364 | pin, cfg, afnames[af], pullnames[pull], slpmnames[slpm], | |
6720db7c RV |
365 | output ? "output " : "input", |
366 | output ? (val ? "high" : "low") : ""); | |
367 | ||
dacdc96c RV |
368 | if (sleep) { |
369 | int slpm_pull = PIN_SLPM_PULL(cfg); | |
370 | int slpm_output = PIN_SLPM_DIR(cfg); | |
371 | int slpm_val = PIN_SLPM_VAL(cfg); | |
372 | ||
3546d15c RV |
373 | af = NMK_GPIO_ALT_GPIO; |
374 | ||
dacdc96c RV |
375 | /* |
376 | * The SLPM_* values are normal values + 1 to allow zero to | |
377 | * mean "same as normal". | |
378 | */ | |
379 | if (slpm_pull) | |
380 | pull = slpm_pull - 1; | |
381 | if (slpm_output) | |
382 | output = slpm_output - 1; | |
383 | if (slpm_val) | |
384 | val = slpm_val - 1; | |
385 | ||
386 | dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n", | |
387 | pin, | |
388 | slpm_pull ? pullnames[pull] : "same", | |
389 | slpm_output ? (output ? "output" : "input") : "same", | |
390 | slpm_val ? (val ? "high" : "low") : "same"); | |
391 | } | |
392 | ||
6720db7c RV |
393 | if (output) |
394 | __nmk_gpio_make_output(nmk_chip, offset, val); | |
395 | else { | |
396 | __nmk_gpio_make_input(nmk_chip, offset); | |
397 | __nmk_gpio_set_pull(nmk_chip, offset, pull); | |
398 | } | |
378be066 | 399 | |
ebc6178d RV |
400 | __nmk_gpio_set_lowemi(nmk_chip, offset, PIN_LOWEMI(cfg)); |
401 | ||
6c42ad1c RV |
402 | /* |
403 | * If the pin is switching to altfunc, and there was an interrupt | |
404 | * installed on it which has been lazy disabled, actually mask the | |
405 | * interrupt to prevent spurious interrupts that would occur while the | |
406 | * pin is under control of the peripheral. Only SKE does this. | |
407 | */ | |
408 | if (af != NMK_GPIO_ALT_GPIO) | |
409 | nmk_gpio_disable_lazy_irq(nmk_chip, offset); | |
410 | ||
01727e61 RV |
411 | /* |
412 | * If we've backed up the SLPM registers (glitch workaround), modify | |
413 | * the backups since they will be restored. | |
414 | */ | |
415 | if (slpmregs) { | |
416 | if (slpm == NMK_GPIO_SLPM_NOCHANGE) | |
417 | slpmregs[nmk_chip->bank] |= BIT(offset); | |
418 | else | |
419 | slpmregs[nmk_chip->bank] &= ~BIT(offset); | |
420 | } else | |
421 | __nmk_gpio_set_slpm(nmk_chip, offset, slpm); | |
422 | ||
423 | __nmk_gpio_set_mode_safe(nmk_chip, offset, af, glitch); | |
424 | } | |
425 | ||
426 | /* | |
427 | * Safe sequence used to switch IOs between GPIO and Alternate-C mode: | |
428 | * - Save SLPM registers | |
429 | * - Set SLPM=0 for the IOs you want to switch and others to 1 | |
430 | * - Configure the GPIO registers for the IOs that are being switched | |
431 | * - Set IOFORCE=1 | |
432 | * - Modify the AFLSA/B registers for the IOs that are being switched | |
433 | * - Set IOFORCE=0 | |
434 | * - Restore SLPM registers | |
435 | * - Any spurious wake up event during switch sequence to be ignored and | |
436 | * cleared | |
437 | */ | |
438 | static void nmk_gpio_glitch_slpm_init(unsigned int *slpm) | |
439 | { | |
440 | int i; | |
441 | ||
442 | for (i = 0; i < NUM_BANKS; i++) { | |
443 | struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; | |
444 | unsigned int temp = slpm[i]; | |
445 | ||
446 | if (!chip) | |
447 | break; | |
448 | ||
3c0227d2 RV |
449 | clk_enable(chip->clk); |
450 | ||
01727e61 RV |
451 | slpm[i] = readl(chip->addr + NMK_GPIO_SLPC); |
452 | writel(temp, chip->addr + NMK_GPIO_SLPC); | |
453 | } | |
454 | } | |
455 | ||
456 | static void nmk_gpio_glitch_slpm_restore(unsigned int *slpm) | |
457 | { | |
458 | int i; | |
459 | ||
460 | for (i = 0; i < NUM_BANKS; i++) { | |
461 | struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; | |
462 | ||
463 | if (!chip) | |
464 | break; | |
465 | ||
466 | writel(slpm[i], chip->addr + NMK_GPIO_SLPC); | |
3c0227d2 RV |
467 | |
468 | clk_disable(chip->clk); | |
01727e61 RV |
469 | } |
470 | } | |
471 | ||
472 | static int __nmk_config_pins(pin_cfg_t *cfgs, int num, bool sleep) | |
473 | { | |
474 | static unsigned int slpm[NUM_BANKS]; | |
475 | unsigned long flags; | |
476 | bool glitch = false; | |
477 | int ret = 0; | |
478 | int i; | |
479 | ||
480 | for (i = 0; i < num; i++) { | |
481 | if (PIN_ALT(cfgs[i]) == NMK_GPIO_ALT_C) { | |
482 | glitch = true; | |
483 | break; | |
484 | } | |
485 | } | |
486 | ||
487 | spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); | |
488 | ||
489 | if (glitch) { | |
490 | memset(slpm, 0xff, sizeof(slpm)); | |
491 | ||
492 | for (i = 0; i < num; i++) { | |
493 | int pin = PIN_NUM(cfgs[i]); | |
494 | int offset = pin % NMK_GPIO_PER_CHIP; | |
495 | ||
496 | if (PIN_ALT(cfgs[i]) == NMK_GPIO_ALT_C) | |
497 | slpm[pin / NMK_GPIO_PER_CHIP] &= ~BIT(offset); | |
498 | } | |
499 | ||
500 | nmk_gpio_glitch_slpm_init(slpm); | |
501 | } | |
502 | ||
503 | for (i = 0; i < num; i++) { | |
504 | struct nmk_gpio_chip *nmk_chip; | |
505 | int pin = PIN_NUM(cfgs[i]); | |
506 | ||
a60b57ed | 507 | nmk_chip = nmk_gpio_chips[pin / NMK_GPIO_PER_CHIP]; |
01727e61 RV |
508 | if (!nmk_chip) { |
509 | ret = -EINVAL; | |
510 | break; | |
511 | } | |
512 | ||
3c0227d2 | 513 | clk_enable(nmk_chip->clk); |
01727e61 | 514 | spin_lock(&nmk_chip->lock); |
a60b57ed | 515 | __nmk_config_pin(nmk_chip, pin % NMK_GPIO_PER_CHIP, |
01727e61 RV |
516 | cfgs[i], sleep, glitch ? slpm : NULL); |
517 | spin_unlock(&nmk_chip->lock); | |
3c0227d2 | 518 | clk_disable(nmk_chip->clk); |
01727e61 RV |
519 | } |
520 | ||
521 | if (glitch) | |
522 | nmk_gpio_glitch_slpm_restore(slpm); | |
523 | ||
524 | spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); | |
525 | ||
526 | return ret; | |
378be066 RV |
527 | } |
528 | ||
529 | /** | |
530 | * nmk_config_pin - configure a pin's mux attributes | |
531 | * @cfg: pin confguration | |
50bcd47c | 532 | * @sleep: Non-zero to apply the sleep mode configuration |
378be066 RV |
533 | * Configures a pin's mode (alternate function or GPIO), its pull up status, |
534 | * and its sleep mode based on the specified configuration. The @cfg is | |
535 | * usually one of the SoC specific macros defined in mach/<soc>-pins.h. These | |
536 | * are constructed using, and can be further enhanced with, the macros in | |
537 | * plat/pincfg.h. | |
538 | * | |
539 | * If a pin's mode is set to GPIO, it is configured as an input to avoid | |
540 | * side-effects. The gpio can be manipulated later using standard GPIO API | |
541 | * calls. | |
542 | */ | |
dacdc96c | 543 | int nmk_config_pin(pin_cfg_t cfg, bool sleep) |
378be066 | 544 | { |
01727e61 | 545 | return __nmk_config_pins(&cfg, 1, sleep); |
378be066 RV |
546 | } |
547 | EXPORT_SYMBOL(nmk_config_pin); | |
548 | ||
549 | /** | |
550 | * nmk_config_pins - configure several pins at once | |
551 | * @cfgs: array of pin configurations | |
552 | * @num: number of elments in the array | |
553 | * | |
554 | * Configures several pins using nmk_config_pin(). Refer to that function for | |
555 | * further information. | |
556 | */ | |
557 | int nmk_config_pins(pin_cfg_t *cfgs, int num) | |
558 | { | |
01727e61 | 559 | return __nmk_config_pins(cfgs, num, false); |
378be066 RV |
560 | } |
561 | EXPORT_SYMBOL(nmk_config_pins); | |
562 | ||
dacdc96c RV |
563 | int nmk_config_pins_sleep(pin_cfg_t *cfgs, int num) |
564 | { | |
01727e61 | 565 | return __nmk_config_pins(cfgs, num, true); |
dacdc96c RV |
566 | } |
567 | EXPORT_SYMBOL(nmk_config_pins_sleep); | |
568 | ||
81a3c298 RV |
569 | /** |
570 | * nmk_gpio_set_slpm() - configure the sleep mode of a pin | |
571 | * @gpio: pin number | |
572 | * @mode: NMK_GPIO_SLPM_INPUT or NMK_GPIO_SLPM_NOCHANGE, | |
573 | * | |
33d78647 LW |
574 | * This register is actually in the pinmux layer, not the GPIO block itself. |
575 | * The GPIO1B_SLPM register defines the GPIO mode when SLEEP/DEEP-SLEEP | |
576 | * mode is entered (i.e. when signal IOFORCE is HIGH by the platform code). | |
577 | * Each GPIO can be configured to be forced into GPIO mode when IOFORCE is | |
578 | * HIGH, overriding the normal setting defined by GPIO_AFSELx registers. | |
579 | * When IOFORCE returns LOW (by software, after SLEEP/DEEP-SLEEP exit), | |
580 | * the GPIOs return to the normal setting defined by GPIO_AFSELx registers. | |
7e3f7e59 | 581 | * |
33d78647 LW |
582 | * If @mode is NMK_GPIO_SLPM_INPUT, the corresponding GPIO is switched to GPIO |
583 | * mode when signal IOFORCE is HIGH (i.e. when SLEEP/DEEP-SLEEP mode is | |
584 | * entered) regardless of the altfunction selected. Also wake-up detection is | |
585 | * ENABLED. | |
586 | * | |
587 | * If @mode is NMK_GPIO_SLPM_NOCHANGE, the corresponding GPIO remains | |
588 | * controlled by NMK_GPIO_DATC, NMK_GPIO_DATS, NMK_GPIO_DIR, NMK_GPIO_PDIS | |
589 | * (for altfunction GPIO) or respective on-chip peripherals (for other | |
590 | * altfuncs) when IOFORCE is HIGH. Also wake-up detection DISABLED. | |
591 | * | |
592 | * Note that enable_irq_wake() will automatically enable wakeup detection. | |
81a3c298 RV |
593 | */ |
594 | int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode) | |
595 | { | |
596 | struct nmk_gpio_chip *nmk_chip; | |
597 | unsigned long flags; | |
598 | ||
a60b57ed | 599 | nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; |
81a3c298 RV |
600 | if (!nmk_chip) |
601 | return -EINVAL; | |
602 | ||
3c0227d2 | 603 | clk_enable(nmk_chip->clk); |
01727e61 RV |
604 | spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); |
605 | spin_lock(&nmk_chip->lock); | |
606 | ||
a60b57ed | 607 | __nmk_gpio_set_slpm(nmk_chip, gpio % NMK_GPIO_PER_CHIP, mode); |
01727e61 RV |
608 | |
609 | spin_unlock(&nmk_chip->lock); | |
610 | spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); | |
3c0227d2 | 611 | clk_disable(nmk_chip->clk); |
81a3c298 RV |
612 | |
613 | return 0; | |
614 | } | |
615 | ||
5b327edf RV |
616 | /** |
617 | * nmk_gpio_set_pull() - enable/disable pull up/down on a gpio | |
618 | * @gpio: pin number | |
619 | * @pull: one of NMK_GPIO_PULL_DOWN, NMK_GPIO_PULL_UP, and NMK_GPIO_PULL_NONE | |
620 | * | |
621 | * Enables/disables pull up/down on a specified pin. This only takes effect if | |
622 | * the pin is configured as an input (either explicitly or by the alternate | |
623 | * function). | |
624 | * | |
625 | * NOTE: If enabling the pull up/down, the caller must ensure that the GPIO is | |
626 | * configured as an input. Otherwise, due to the way the controller registers | |
627 | * work, this function will change the value output on the pin. | |
628 | */ | |
629 | int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull) | |
630 | { | |
631 | struct nmk_gpio_chip *nmk_chip; | |
632 | unsigned long flags; | |
633 | ||
a60b57ed | 634 | nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; |
5b327edf RV |
635 | if (!nmk_chip) |
636 | return -EINVAL; | |
637 | ||
3c0227d2 | 638 | clk_enable(nmk_chip->clk); |
5b327edf | 639 | spin_lock_irqsave(&nmk_chip->lock, flags); |
a60b57ed | 640 | __nmk_gpio_set_pull(nmk_chip, gpio % NMK_GPIO_PER_CHIP, pull); |
5b327edf | 641 | spin_unlock_irqrestore(&nmk_chip->lock, flags); |
3c0227d2 | 642 | clk_disable(nmk_chip->clk); |
5b327edf RV |
643 | |
644 | return 0; | |
645 | } | |
646 | ||
2ec1d359 | 647 | /* Mode functions */ |
9c66ee6f JA |
648 | /** |
649 | * nmk_gpio_set_mode() - set the mux mode of a gpio pin | |
650 | * @gpio: pin number | |
651 | * @gpio_mode: one of NMK_GPIO_ALT_GPIO, NMK_GPIO_ALT_A, | |
652 | * NMK_GPIO_ALT_B, and NMK_GPIO_ALT_C | |
653 | * | |
654 | * Sets the mode of the specified pin to one of the alternate functions or | |
655 | * plain GPIO. | |
656 | */ | |
2ec1d359 AR |
657 | int nmk_gpio_set_mode(int gpio, int gpio_mode) |
658 | { | |
659 | struct nmk_gpio_chip *nmk_chip; | |
660 | unsigned long flags; | |
2ec1d359 | 661 | |
a60b57ed | 662 | nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; |
2ec1d359 AR |
663 | if (!nmk_chip) |
664 | return -EINVAL; | |
665 | ||
3c0227d2 | 666 | clk_enable(nmk_chip->clk); |
2ec1d359 | 667 | spin_lock_irqsave(&nmk_chip->lock, flags); |
a60b57ed | 668 | __nmk_gpio_set_mode(nmk_chip, gpio % NMK_GPIO_PER_CHIP, gpio_mode); |
2ec1d359 | 669 | spin_unlock_irqrestore(&nmk_chip->lock, flags); |
3c0227d2 | 670 | clk_disable(nmk_chip->clk); |
2ec1d359 AR |
671 | |
672 | return 0; | |
673 | } | |
674 | EXPORT_SYMBOL(nmk_gpio_set_mode); | |
675 | ||
676 | int nmk_gpio_get_mode(int gpio) | |
677 | { | |
678 | struct nmk_gpio_chip *nmk_chip; | |
679 | u32 afunc, bfunc, bit; | |
680 | ||
a60b57ed | 681 | nmk_chip = nmk_gpio_chips[gpio / NMK_GPIO_PER_CHIP]; |
2ec1d359 AR |
682 | if (!nmk_chip) |
683 | return -EINVAL; | |
684 | ||
a60b57ed | 685 | bit = 1 << (gpio % NMK_GPIO_PER_CHIP); |
2ec1d359 | 686 | |
3c0227d2 RV |
687 | clk_enable(nmk_chip->clk); |
688 | ||
2ec1d359 AR |
689 | afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & bit; |
690 | bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & bit; | |
691 | ||
3c0227d2 RV |
692 | clk_disable(nmk_chip->clk); |
693 | ||
2ec1d359 AR |
694 | return (afunc ? NMK_GPIO_ALT_A : 0) | (bfunc ? NMK_GPIO_ALT_B : 0); |
695 | } | |
696 | EXPORT_SYMBOL(nmk_gpio_get_mode); | |
697 | ||
698 | ||
699 | /* IRQ functions */ | |
700 | static inline int nmk_gpio_get_bitmask(int gpio) | |
701 | { | |
a60b57ed | 702 | return 1 << (gpio % NMK_GPIO_PER_CHIP); |
2ec1d359 AR |
703 | } |
704 | ||
f272c00e | 705 | static void nmk_gpio_irq_ack(struct irq_data *d) |
2ec1d359 | 706 | { |
2ec1d359 AR |
707 | struct nmk_gpio_chip *nmk_chip; |
708 | ||
f272c00e | 709 | nmk_chip = irq_data_get_irq_chip_data(d); |
2ec1d359 AR |
710 | if (!nmk_chip) |
711 | return; | |
3c0227d2 RV |
712 | |
713 | clk_enable(nmk_chip->clk); | |
a60b57ed | 714 | writel(nmk_gpio_get_bitmask(d->hwirq), nmk_chip->addr + NMK_GPIO_IC); |
3c0227d2 | 715 | clk_disable(nmk_chip->clk); |
2ec1d359 AR |
716 | } |
717 | ||
4d4e20f7 RV |
718 | enum nmk_gpio_irq_type { |
719 | NORMAL, | |
720 | WAKE, | |
721 | }; | |
722 | ||
040e5ecd | 723 | static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip, |
4d4e20f7 RV |
724 | int gpio, enum nmk_gpio_irq_type which, |
725 | bool enable) | |
2ec1d359 | 726 | { |
040e5ecd | 727 | u32 bitmask = nmk_gpio_get_bitmask(gpio); |
6c12fe88 RV |
728 | u32 *rimscval; |
729 | u32 *fimscval; | |
730 | u32 rimscreg; | |
731 | u32 fimscreg; | |
732 | ||
733 | if (which == NORMAL) { | |
734 | rimscreg = NMK_GPIO_RIMSC; | |
735 | fimscreg = NMK_GPIO_FIMSC; | |
736 | rimscval = &nmk_chip->rimsc; | |
737 | fimscval = &nmk_chip->fimsc; | |
738 | } else { | |
739 | rimscreg = NMK_GPIO_RWIMSC; | |
740 | fimscreg = NMK_GPIO_FWIMSC; | |
741 | rimscval = &nmk_chip->rwimsc; | |
742 | fimscval = &nmk_chip->fwimsc; | |
743 | } | |
2ec1d359 | 744 | |
040e5ecd | 745 | /* we must individually set/clear the two edges */ |
2ec1d359 | 746 | if (nmk_chip->edge_rising & bitmask) { |
040e5ecd | 747 | if (enable) |
6c12fe88 | 748 | *rimscval |= bitmask; |
040e5ecd | 749 | else |
6c12fe88 RV |
750 | *rimscval &= ~bitmask; |
751 | writel(*rimscval, nmk_chip->addr + rimscreg); | |
2ec1d359 AR |
752 | } |
753 | if (nmk_chip->edge_falling & bitmask) { | |
040e5ecd | 754 | if (enable) |
6c12fe88 | 755 | *fimscval |= bitmask; |
040e5ecd | 756 | else |
6c12fe88 RV |
757 | *fimscval &= ~bitmask; |
758 | writel(*fimscval, nmk_chip->addr + fimscreg); | |
2ec1d359 | 759 | } |
040e5ecd | 760 | } |
2ec1d359 | 761 | |
b9df468d RV |
762 | static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip, |
763 | int gpio, bool on) | |
764 | { | |
b982ff0e RV |
765 | /* |
766 | * Ensure WAKEUP_ENABLE is on. No need to disable it if wakeup is | |
767 | * disabled, since setting SLPM to 1 increases power consumption, and | |
768 | * wakeup is anyhow controlled by the RIMSC and FIMSC registers. | |
769 | */ | |
770 | if (nmk_chip->sleepmode && on) { | |
e85bbc19 | 771 | __nmk_gpio_set_slpm(nmk_chip, gpio % NMK_GPIO_PER_CHIP, |
b982ff0e | 772 | NMK_GPIO_SLPM_WAKEUP_ENABLE); |
33d78647 LW |
773 | } |
774 | ||
b9df468d RV |
775 | __nmk_gpio_irq_modify(nmk_chip, gpio, WAKE, on); |
776 | } | |
777 | ||
778 | static int nmk_gpio_irq_maskunmask(struct irq_data *d, bool enable) | |
2ec1d359 | 779 | { |
2ec1d359 AR |
780 | struct nmk_gpio_chip *nmk_chip; |
781 | unsigned long flags; | |
040e5ecd | 782 | u32 bitmask; |
2ec1d359 | 783 | |
f272c00e | 784 | nmk_chip = irq_data_get_irq_chip_data(d); |
a60b57ed | 785 | bitmask = nmk_gpio_get_bitmask(d->hwirq); |
2ec1d359 | 786 | if (!nmk_chip) |
4d4e20f7 | 787 | return -EINVAL; |
2ec1d359 | 788 | |
3c0227d2 | 789 | clk_enable(nmk_chip->clk); |
b9df468d RV |
790 | spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); |
791 | spin_lock(&nmk_chip->lock); | |
792 | ||
a60b57ed | 793 | __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, enable); |
b9df468d RV |
794 | |
795 | if (!(nmk_chip->real_wake & bitmask)) | |
a60b57ed | 796 | __nmk_gpio_set_wake(nmk_chip, d->hwirq, enable); |
b9df468d RV |
797 | |
798 | spin_unlock(&nmk_chip->lock); | |
799 | spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); | |
3c0227d2 | 800 | clk_disable(nmk_chip->clk); |
4d4e20f7 RV |
801 | |
802 | return 0; | |
2ec1d359 AR |
803 | } |
804 | ||
f272c00e | 805 | static void nmk_gpio_irq_mask(struct irq_data *d) |
040e5ecd | 806 | { |
b9df468d | 807 | nmk_gpio_irq_maskunmask(d, false); |
4d4e20f7 | 808 | } |
040e5ecd | 809 | |
f272c00e | 810 | static void nmk_gpio_irq_unmask(struct irq_data *d) |
040e5ecd | 811 | { |
b9df468d | 812 | nmk_gpio_irq_maskunmask(d, true); |
4d4e20f7 RV |
813 | } |
814 | ||
f272c00e | 815 | static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on) |
4d4e20f7 | 816 | { |
7e3f7e59 RV |
817 | struct nmk_gpio_chip *nmk_chip; |
818 | unsigned long flags; | |
b9df468d | 819 | u32 bitmask; |
7e3f7e59 | 820 | |
f272c00e | 821 | nmk_chip = irq_data_get_irq_chip_data(d); |
7e3f7e59 RV |
822 | if (!nmk_chip) |
823 | return -EINVAL; | |
a60b57ed | 824 | bitmask = nmk_gpio_get_bitmask(d->hwirq); |
7e3f7e59 | 825 | |
3c0227d2 | 826 | clk_enable(nmk_chip->clk); |
01727e61 RV |
827 | spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); |
828 | spin_lock(&nmk_chip->lock); | |
829 | ||
479a0c7e | 830 | if (irqd_irq_disabled(d)) |
a60b57ed | 831 | __nmk_gpio_set_wake(nmk_chip, d->hwirq, on); |
b9df468d RV |
832 | |
833 | if (on) | |
834 | nmk_chip->real_wake |= bitmask; | |
835 | else | |
836 | nmk_chip->real_wake &= ~bitmask; | |
01727e61 RV |
837 | |
838 | spin_unlock(&nmk_chip->lock); | |
839 | spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); | |
3c0227d2 | 840 | clk_disable(nmk_chip->clk); |
7e3f7e59 RV |
841 | |
842 | return 0; | |
040e5ecd RV |
843 | } |
844 | ||
f272c00e | 845 | static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type) |
2ec1d359 | 846 | { |
479a0c7e | 847 | bool enabled = !irqd_irq_disabled(d); |
3c0227d2 | 848 | bool wake = irqd_is_wakeup_set(d); |
2ec1d359 AR |
849 | struct nmk_gpio_chip *nmk_chip; |
850 | unsigned long flags; | |
851 | u32 bitmask; | |
852 | ||
f272c00e | 853 | nmk_chip = irq_data_get_irq_chip_data(d); |
a60b57ed | 854 | bitmask = nmk_gpio_get_bitmask(d->hwirq); |
2ec1d359 AR |
855 | if (!nmk_chip) |
856 | return -EINVAL; | |
2ec1d359 AR |
857 | if (type & IRQ_TYPE_LEVEL_HIGH) |
858 | return -EINVAL; | |
859 | if (type & IRQ_TYPE_LEVEL_LOW) | |
860 | return -EINVAL; | |
861 | ||
3c0227d2 | 862 | clk_enable(nmk_chip->clk); |
2ec1d359 AR |
863 | spin_lock_irqsave(&nmk_chip->lock, flags); |
864 | ||
7a852d80 | 865 | if (enabled) |
a60b57ed | 866 | __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, false); |
4d4e20f7 | 867 | |
b9df468d | 868 | if (enabled || wake) |
a60b57ed | 869 | __nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, false); |
7a852d80 | 870 | |
2ec1d359 AR |
871 | nmk_chip->edge_rising &= ~bitmask; |
872 | if (type & IRQ_TYPE_EDGE_RISING) | |
873 | nmk_chip->edge_rising |= bitmask; | |
2ec1d359 AR |
874 | |
875 | nmk_chip->edge_falling &= ~bitmask; | |
876 | if (type & IRQ_TYPE_EDGE_FALLING) | |
877 | nmk_chip->edge_falling |= bitmask; | |
2ec1d359 | 878 | |
7a852d80 | 879 | if (enabled) |
a60b57ed | 880 | __nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, true); |
4d4e20f7 | 881 | |
b9df468d | 882 | if (enabled || wake) |
a60b57ed | 883 | __nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, true); |
2ec1d359 | 884 | |
7a852d80 | 885 | spin_unlock_irqrestore(&nmk_chip->lock, flags); |
3c0227d2 | 886 | clk_disable(nmk_chip->clk); |
2ec1d359 AR |
887 | |
888 | return 0; | |
889 | } | |
890 | ||
3c0227d2 RV |
891 | static unsigned int nmk_gpio_irq_startup(struct irq_data *d) |
892 | { | |
893 | struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d); | |
2ec1d359 | 894 | |
3c0227d2 RV |
895 | clk_enable(nmk_chip->clk); |
896 | nmk_gpio_irq_unmask(d); | |
2ec1d359 AR |
897 | return 0; |
898 | } | |
899 | ||
3c0227d2 RV |
900 | static void nmk_gpio_irq_shutdown(struct irq_data *d) |
901 | { | |
902 | struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d); | |
903 | ||
904 | nmk_gpio_irq_mask(d); | |
905 | clk_disable(nmk_chip->clk); | |
906 | } | |
907 | ||
2ec1d359 AR |
908 | static struct irq_chip nmk_gpio_irq_chip = { |
909 | .name = "Nomadik-GPIO", | |
f272c00e LB |
910 | .irq_ack = nmk_gpio_irq_ack, |
911 | .irq_mask = nmk_gpio_irq_mask, | |
912 | .irq_unmask = nmk_gpio_irq_unmask, | |
913 | .irq_set_type = nmk_gpio_irq_set_type, | |
914 | .irq_set_wake = nmk_gpio_irq_set_wake, | |
3c0227d2 RV |
915 | .irq_startup = nmk_gpio_irq_startup, |
916 | .irq_shutdown = nmk_gpio_irq_shutdown, | |
4921e745 | 917 | .flags = IRQCHIP_MASK_ON_SUSPEND, |
2ec1d359 AR |
918 | }; |
919 | ||
33b744b3 RV |
920 | static void __nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc, |
921 | u32 status) | |
2ec1d359 AR |
922 | { |
923 | struct nmk_gpio_chip *nmk_chip; | |
6845664a | 924 | struct irq_chip *host_chip = irq_get_chip(irq); |
2ec1d359 | 925 | |
adfed159 | 926 | chained_irq_enter(host_chip, desc); |
aaedaa2b | 927 | |
6845664a | 928 | nmk_chip = irq_get_handler_data(irq); |
33b744b3 RV |
929 | while (status) { |
930 | int bit = __ffs(status); | |
931 | ||
95f0bc9b | 932 | generic_handle_irq(irq_find_mapping(nmk_chip->domain, bit)); |
33b744b3 | 933 | status &= ~BIT(bit); |
2ec1d359 | 934 | } |
aaedaa2b | 935 | |
adfed159 | 936 | chained_irq_exit(host_chip, desc); |
2ec1d359 AR |
937 | } |
938 | ||
33b744b3 RV |
939 | static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc) |
940 | { | |
6845664a | 941 | struct nmk_gpio_chip *nmk_chip = irq_get_handler_data(irq); |
3c0227d2 RV |
942 | u32 status; |
943 | ||
944 | clk_enable(nmk_chip->clk); | |
945 | status = readl(nmk_chip->addr + NMK_GPIO_IS); | |
946 | clk_disable(nmk_chip->clk); | |
33b744b3 RV |
947 | |
948 | __nmk_gpio_irq_handler(irq, desc, status); | |
949 | } | |
950 | ||
951 | static void nmk_gpio_secondary_irq_handler(unsigned int irq, | |
952 | struct irq_desc *desc) | |
953 | { | |
6845664a | 954 | struct nmk_gpio_chip *nmk_chip = irq_get_handler_data(irq); |
33b744b3 RV |
955 | u32 status = nmk_chip->get_secondary_status(nmk_chip->bank); |
956 | ||
957 | __nmk_gpio_irq_handler(irq, desc, status); | |
958 | } | |
959 | ||
2ec1d359 AR |
960 | static int nmk_gpio_init_irq(struct nmk_gpio_chip *nmk_chip) |
961 | { | |
6845664a TG |
962 | irq_set_chained_handler(nmk_chip->parent_irq, nmk_gpio_irq_handler); |
963 | irq_set_handler_data(nmk_chip->parent_irq, nmk_chip); | |
33b744b3 RV |
964 | |
965 | if (nmk_chip->secondary_parent_irq >= 0) { | |
6845664a | 966 | irq_set_chained_handler(nmk_chip->secondary_parent_irq, |
33b744b3 | 967 | nmk_gpio_secondary_irq_handler); |
6845664a | 968 | irq_set_handler_data(nmk_chip->secondary_parent_irq, nmk_chip); |
33b744b3 RV |
969 | } |
970 | ||
2ec1d359 AR |
971 | return 0; |
972 | } | |
973 | ||
974 | /* I/O Functions */ | |
dbfe8ca2 LW |
975 | |
976 | static int nmk_gpio_request(struct gpio_chip *chip, unsigned offset) | |
977 | { | |
978 | /* | |
979 | * Map back to global GPIO space and request muxing, the direction | |
980 | * parameter does not matter for this controller. | |
981 | */ | |
982 | int gpio = chip->base + offset; | |
983 | ||
984 | return pinctrl_request_gpio(gpio); | |
985 | } | |
986 | ||
987 | static void nmk_gpio_free(struct gpio_chip *chip, unsigned offset) | |
988 | { | |
989 | int gpio = chip->base + offset; | |
990 | ||
991 | pinctrl_free_gpio(gpio); | |
992 | } | |
993 | ||
2ec1d359 AR |
994 | static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset) |
995 | { | |
996 | struct nmk_gpio_chip *nmk_chip = | |
997 | container_of(chip, struct nmk_gpio_chip, chip); | |
998 | ||
3c0227d2 RV |
999 | clk_enable(nmk_chip->clk); |
1000 | ||
2ec1d359 | 1001 | writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC); |
3c0227d2 RV |
1002 | |
1003 | clk_disable(nmk_chip->clk); | |
1004 | ||
2ec1d359 AR |
1005 | return 0; |
1006 | } | |
1007 | ||
2ec1d359 AR |
1008 | static int nmk_gpio_get_input(struct gpio_chip *chip, unsigned offset) |
1009 | { | |
1010 | struct nmk_gpio_chip *nmk_chip = | |
1011 | container_of(chip, struct nmk_gpio_chip, chip); | |
1012 | u32 bit = 1 << offset; | |
3c0227d2 RV |
1013 | int value; |
1014 | ||
1015 | clk_enable(nmk_chip->clk); | |
2ec1d359 | 1016 | |
3c0227d2 | 1017 | value = (readl(nmk_chip->addr + NMK_GPIO_DAT) & bit) != 0; |
2ec1d359 | 1018 | |
3c0227d2 RV |
1019 | clk_disable(nmk_chip->clk); |
1020 | ||
1021 | return value; | |
2ec1d359 AR |
1022 | } |
1023 | ||
1024 | static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset, | |
1025 | int val) | |
1026 | { | |
1027 | struct nmk_gpio_chip *nmk_chip = | |
1028 | container_of(chip, struct nmk_gpio_chip, chip); | |
2ec1d359 | 1029 | |
3c0227d2 RV |
1030 | clk_enable(nmk_chip->clk); |
1031 | ||
6720db7c | 1032 | __nmk_gpio_set_output(nmk_chip, offset, val); |
3c0227d2 RV |
1033 | |
1034 | clk_disable(nmk_chip->clk); | |
2ec1d359 AR |
1035 | } |
1036 | ||
6647c6c0 RV |
1037 | static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset, |
1038 | int val) | |
1039 | { | |
1040 | struct nmk_gpio_chip *nmk_chip = | |
1041 | container_of(chip, struct nmk_gpio_chip, chip); | |
1042 | ||
3c0227d2 RV |
1043 | clk_enable(nmk_chip->clk); |
1044 | ||
6720db7c | 1045 | __nmk_gpio_make_output(nmk_chip, offset, val); |
6647c6c0 | 1046 | |
3c0227d2 RV |
1047 | clk_disable(nmk_chip->clk); |
1048 | ||
6647c6c0 RV |
1049 | return 0; |
1050 | } | |
1051 | ||
0d2aec9c RV |
1052 | static int nmk_gpio_to_irq(struct gpio_chip *chip, unsigned offset) |
1053 | { | |
1054 | struct nmk_gpio_chip *nmk_chip = | |
1055 | container_of(chip, struct nmk_gpio_chip, chip); | |
1056 | ||
268300be | 1057 | return irq_create_mapping(nmk_chip->domain, offset); |
0d2aec9c RV |
1058 | } |
1059 | ||
d0b543c7 RV |
1060 | #ifdef CONFIG_DEBUG_FS |
1061 | ||
1062 | #include <linux/seq_file.h> | |
1063 | ||
6f4350a6 LW |
1064 | static void nmk_gpio_dbg_show_one(struct seq_file *s, struct gpio_chip *chip, |
1065 | unsigned offset, unsigned gpio) | |
d0b543c7 | 1066 | { |
6f4350a6 | 1067 | const char *label = gpiochip_is_requested(chip, offset); |
d0b543c7 RV |
1068 | struct nmk_gpio_chip *nmk_chip = |
1069 | container_of(chip, struct nmk_gpio_chip, chip); | |
6f4350a6 LW |
1070 | int mode; |
1071 | bool is_out; | |
1072 | bool pull; | |
1073 | u32 bit = 1 << offset; | |
d0b543c7 RV |
1074 | const char *modes[] = { |
1075 | [NMK_GPIO_ALT_GPIO] = "gpio", | |
1076 | [NMK_GPIO_ALT_A] = "altA", | |
1077 | [NMK_GPIO_ALT_B] = "altB", | |
1078 | [NMK_GPIO_ALT_C] = "altC", | |
1079 | }; | |
1080 | ||
3c0227d2 | 1081 | clk_enable(nmk_chip->clk); |
6f4350a6 LW |
1082 | is_out = !!(readl(nmk_chip->addr + NMK_GPIO_DIR) & bit); |
1083 | pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & bit); | |
1084 | mode = nmk_gpio_get_mode(gpio); | |
1085 | ||
1086 | seq_printf(s, " gpio-%-3d (%-20.20s) %s %s %s %s", | |
1087 | gpio, label ?: "(none)", | |
1088 | is_out ? "out" : "in ", | |
1089 | chip->get | |
1090 | ? (chip->get(chip, offset) ? "hi" : "lo") | |
1091 | : "? ", | |
1092 | (mode < 0) ? "unknown" : modes[mode], | |
1093 | pull ? "pull" : "none"); | |
1094 | ||
1095 | if (label && !is_out) { | |
1096 | int irq = gpio_to_irq(gpio); | |
1097 | struct irq_desc *desc = irq_to_desc(irq); | |
1098 | ||
1099 | /* This races with request_irq(), set_irq_type(), | |
1100 | * and set_irq_wake() ... but those are "rare". | |
1101 | */ | |
1102 | if (irq >= 0 && desc->action) { | |
1103 | char *trigger; | |
1104 | u32 bitmask = nmk_gpio_get_bitmask(gpio); | |
1105 | ||
1106 | if (nmk_chip->edge_rising & bitmask) | |
1107 | trigger = "edge-rising"; | |
1108 | else if (nmk_chip->edge_falling & bitmask) | |
1109 | trigger = "edge-falling"; | |
1110 | else | |
1111 | trigger = "edge-undefined"; | |
1112 | ||
1113 | seq_printf(s, " irq-%d %s%s", | |
1114 | irq, trigger, | |
1115 | irqd_is_wakeup_set(&desc->irq_data) | |
1116 | ? " wakeup" : ""); | |
8ea72a30 | 1117 | } |
6f4350a6 LW |
1118 | } |
1119 | clk_disable(nmk_chip->clk); | |
1120 | } | |
1121 | ||
1122 | static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) | |
1123 | { | |
1124 | unsigned i; | |
1125 | unsigned gpio = chip->base; | |
8ea72a30 | 1126 | |
6f4350a6 LW |
1127 | for (i = 0; i < chip->ngpio; i++, gpio++) { |
1128 | nmk_gpio_dbg_show_one(s, chip, i, gpio); | |
d0b543c7 RV |
1129 | seq_printf(s, "\n"); |
1130 | } | |
1131 | } | |
1132 | ||
1133 | #else | |
6f4350a6 LW |
1134 | static inline void nmk_gpio_dbg_show_one(struct seq_file *s, |
1135 | struct gpio_chip *chip, | |
1136 | unsigned offset, unsigned gpio) | |
1137 | { | |
1138 | } | |
d0b543c7 RV |
1139 | #define nmk_gpio_dbg_show NULL |
1140 | #endif | |
1141 | ||
2ec1d359 AR |
1142 | /* This structure is replicated for each GPIO block allocated at probe time */ |
1143 | static struct gpio_chip nmk_gpio_template = { | |
dbfe8ca2 LW |
1144 | .request = nmk_gpio_request, |
1145 | .free = nmk_gpio_free, | |
2ec1d359 AR |
1146 | .direction_input = nmk_gpio_make_input, |
1147 | .get = nmk_gpio_get_input, | |
1148 | .direction_output = nmk_gpio_make_output, | |
1149 | .set = nmk_gpio_set_output, | |
0d2aec9c | 1150 | .to_irq = nmk_gpio_to_irq, |
d0b543c7 | 1151 | .dbg_show = nmk_gpio_dbg_show, |
2ec1d359 AR |
1152 | .can_sleep = 0, |
1153 | }; | |
1154 | ||
3c0227d2 RV |
1155 | void nmk_gpio_clocks_enable(void) |
1156 | { | |
1157 | int i; | |
1158 | ||
1159 | for (i = 0; i < NUM_BANKS; i++) { | |
1160 | struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; | |
1161 | ||
1162 | if (!chip) | |
1163 | continue; | |
1164 | ||
1165 | clk_enable(chip->clk); | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | void nmk_gpio_clocks_disable(void) | |
1170 | { | |
1171 | int i; | |
1172 | ||
1173 | for (i = 0; i < NUM_BANKS; i++) { | |
1174 | struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; | |
1175 | ||
1176 | if (!chip) | |
1177 | continue; | |
1178 | ||
1179 | clk_disable(chip->clk); | |
1180 | } | |
1181 | } | |
1182 | ||
b9df468d RV |
1183 | /* |
1184 | * Called from the suspend/resume path to only keep the real wakeup interrupts | |
1185 | * (those that have had set_irq_wake() called on them) as wakeup interrupts, | |
1186 | * and not the rest of the interrupts which we needed to have as wakeups for | |
1187 | * cpuidle. | |
1188 | * | |
1189 | * PM ops are not used since this needs to be done at the end, after all the | |
1190 | * other drivers are done with their suspend callbacks. | |
1191 | */ | |
1192 | void nmk_gpio_wakeups_suspend(void) | |
1193 | { | |
1194 | int i; | |
1195 | ||
1196 | for (i = 0; i < NUM_BANKS; i++) { | |
1197 | struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; | |
1198 | ||
1199 | if (!chip) | |
1200 | break; | |
1201 | ||
3c0227d2 RV |
1202 | clk_enable(chip->clk); |
1203 | ||
b9df468d RV |
1204 | writel(chip->rwimsc & chip->real_wake, |
1205 | chip->addr + NMK_GPIO_RWIMSC); | |
1206 | writel(chip->fwimsc & chip->real_wake, | |
1207 | chip->addr + NMK_GPIO_FWIMSC); | |
1208 | ||
3c0227d2 | 1209 | clk_disable(chip->clk); |
b9df468d RV |
1210 | } |
1211 | } | |
1212 | ||
1213 | void nmk_gpio_wakeups_resume(void) | |
1214 | { | |
1215 | int i; | |
1216 | ||
1217 | for (i = 0; i < NUM_BANKS; i++) { | |
1218 | struct nmk_gpio_chip *chip = nmk_gpio_chips[i]; | |
1219 | ||
1220 | if (!chip) | |
1221 | break; | |
1222 | ||
3c0227d2 RV |
1223 | clk_enable(chip->clk); |
1224 | ||
b9df468d RV |
1225 | writel(chip->rwimsc, chip->addr + NMK_GPIO_RWIMSC); |
1226 | writel(chip->fwimsc, chip->addr + NMK_GPIO_FWIMSC); | |
1227 | ||
3c0227d2 | 1228 | clk_disable(chip->clk); |
b9df468d RV |
1229 | } |
1230 | } | |
1231 | ||
bc6f5cf6 RA |
1232 | /* |
1233 | * Read the pull up/pull down status. | |
1234 | * A bit set in 'pull_up' means that pull up | |
1235 | * is selected if pull is enabled in PDIS register. | |
1236 | * Note: only pull up/down set via this driver can | |
1237 | * be detected due to HW limitations. | |
1238 | */ | |
1239 | void nmk_gpio_read_pull(int gpio_bank, u32 *pull_up) | |
1240 | { | |
1241 | if (gpio_bank < NUM_BANKS) { | |
1242 | struct nmk_gpio_chip *chip = nmk_gpio_chips[gpio_bank]; | |
1243 | ||
1244 | if (!chip) | |
1245 | return; | |
1246 | ||
1247 | *pull_up = chip->pull_up; | |
1248 | } | |
1249 | } | |
1250 | ||
a60b57ed LJ |
1251 | int nmk_gpio_irq_map(struct irq_domain *d, unsigned int irq, |
1252 | irq_hw_number_t hwirq) | |
1253 | { | |
1254 | struct nmk_gpio_chip *nmk_chip = d->host_data; | |
1255 | ||
1256 | if (!nmk_chip) | |
1257 | return -EINVAL; | |
1258 | ||
1259 | irq_set_chip_and_handler(irq, &nmk_gpio_irq_chip, handle_edge_irq); | |
1260 | set_irq_flags(irq, IRQF_VALID); | |
1261 | irq_set_chip_data(irq, nmk_chip); | |
1262 | irq_set_irq_type(irq, IRQ_TYPE_EDGE_FALLING); | |
1263 | ||
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | const struct irq_domain_ops nmk_gpio_irq_simple_ops = { | |
1268 | .map = nmk_gpio_irq_map, | |
1269 | .xlate = irq_domain_xlate_twocell, | |
1270 | }; | |
1271 | ||
fd0d67d6 | 1272 | static int __devinit nmk_gpio_probe(struct platform_device *dev) |
2ec1d359 | 1273 | { |
3e3c62ca | 1274 | struct nmk_gpio_platform_data *pdata = dev->dev.platform_data; |
513c27f8 | 1275 | struct device_node *np = dev->dev.of_node; |
2ec1d359 AR |
1276 | struct nmk_gpio_chip *nmk_chip; |
1277 | struct gpio_chip *chip; | |
3e3c62ca | 1278 | struct resource *res; |
af7dc228 | 1279 | struct clk *clk; |
33b744b3 | 1280 | int secondary_irq; |
8d91771c | 1281 | void __iomem *base; |
832b6cdf | 1282 | int irq_start = 0; |
3e3c62ca | 1283 | int irq; |
2ec1d359 AR |
1284 | int ret; |
1285 | ||
513c27f8 LJ |
1286 | if (!pdata && !np) { |
1287 | dev_err(&dev->dev, "No platform data or device tree found\n"); | |
3e3c62ca | 1288 | return -ENODEV; |
513c27f8 LJ |
1289 | } |
1290 | ||
1291 | if (np) { | |
5e754f33 | 1292 | pdata = devm_kzalloc(&dev->dev, sizeof(*pdata), GFP_KERNEL); |
513c27f8 LJ |
1293 | if (!pdata) |
1294 | return -ENOMEM; | |
1295 | ||
612e1d5f | 1296 | if (of_get_property(np, "st,supports-sleepmode", NULL)) |
513c27f8 LJ |
1297 | pdata->supports_sleepmode = true; |
1298 | ||
1299 | if (of_property_read_u32(np, "gpio-bank", &dev->id)) { | |
1300 | dev_err(&dev->dev, "gpio-bank property not found\n"); | |
1301 | ret = -EINVAL; | |
a60b57ed | 1302 | goto out; |
513c27f8 LJ |
1303 | } |
1304 | ||
1305 | pdata->first_gpio = dev->id * NMK_GPIO_PER_CHIP; | |
1306 | pdata->num_gpio = NMK_GPIO_PER_CHIP; | |
1307 | } | |
3e3c62ca RV |
1308 | |
1309 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
1310 | if (!res) { | |
1311 | ret = -ENOENT; | |
1312 | goto out; | |
1313 | } | |
1314 | ||
1315 | irq = platform_get_irq(dev, 0); | |
1316 | if (irq < 0) { | |
1317 | ret = irq; | |
1318 | goto out; | |
1319 | } | |
1320 | ||
33b744b3 RV |
1321 | secondary_irq = platform_get_irq(dev, 1); |
1322 | if (secondary_irq >= 0 && !pdata->get_secondary_status) { | |
1323 | ret = -EINVAL; | |
1324 | goto out; | |
1325 | } | |
1326 | ||
5e754f33 | 1327 | base = devm_request_and_ioremap(&dev->dev, res); |
8d91771c LW |
1328 | if (!base) { |
1329 | ret = -ENOMEM; | |
5e754f33 | 1330 | goto out; |
8d91771c LW |
1331 | } |
1332 | ||
5e754f33 | 1333 | clk = devm_clk_get(&dev->dev, NULL); |
af7dc228 RV |
1334 | if (IS_ERR(clk)) { |
1335 | ret = PTR_ERR(clk); | |
5e754f33 | 1336 | goto out; |
af7dc228 | 1337 | } |
efec381c | 1338 | clk_prepare(clk); |
af7dc228 | 1339 | |
5e754f33 | 1340 | nmk_chip = devm_kzalloc(&dev->dev, sizeof(*nmk_chip), GFP_KERNEL); |
2ec1d359 AR |
1341 | if (!nmk_chip) { |
1342 | ret = -ENOMEM; | |
5e754f33 | 1343 | goto out; |
2ec1d359 | 1344 | } |
513c27f8 | 1345 | |
2ec1d359 AR |
1346 | /* |
1347 | * The virt address in nmk_chip->addr is in the nomadik register space, | |
1348 | * so we can simply convert the resource address, without remapping | |
1349 | */ | |
33b744b3 | 1350 | nmk_chip->bank = dev->id; |
af7dc228 | 1351 | nmk_chip->clk = clk; |
8d91771c | 1352 | nmk_chip->addr = base; |
2ec1d359 | 1353 | nmk_chip->chip = nmk_gpio_template; |
3e3c62ca | 1354 | nmk_chip->parent_irq = irq; |
33b744b3 RV |
1355 | nmk_chip->secondary_parent_irq = secondary_irq; |
1356 | nmk_chip->get_secondary_status = pdata->get_secondary_status; | |
01727e61 | 1357 | nmk_chip->set_ioforce = pdata->set_ioforce; |
33d78647 | 1358 | nmk_chip->sleepmode = pdata->supports_sleepmode; |
c0fcb8db | 1359 | spin_lock_init(&nmk_chip->lock); |
2ec1d359 AR |
1360 | |
1361 | chip = &nmk_chip->chip; | |
1362 | chip->base = pdata->first_gpio; | |
e493e06f | 1363 | chip->ngpio = pdata->num_gpio; |
8d568ae5 | 1364 | chip->label = pdata->name ?: dev_name(&dev->dev); |
2ec1d359 AR |
1365 | chip->dev = &dev->dev; |
1366 | chip->owner = THIS_MODULE; | |
1367 | ||
ebc6178d RV |
1368 | clk_enable(nmk_chip->clk); |
1369 | nmk_chip->lowemi = readl_relaxed(nmk_chip->addr + NMK_GPIO_LOWEMI); | |
1370 | clk_disable(nmk_chip->clk); | |
1371 | ||
072e82a1 | 1372 | #ifdef CONFIG_OF_GPIO |
513c27f8 | 1373 | chip->of_node = np; |
072e82a1 | 1374 | #endif |
513c27f8 | 1375 | |
2ec1d359 AR |
1376 | ret = gpiochip_add(&nmk_chip->chip); |
1377 | if (ret) | |
5e754f33 | 1378 | goto out; |
2ec1d359 | 1379 | |
01727e61 RV |
1380 | BUG_ON(nmk_chip->bank >= ARRAY_SIZE(nmk_gpio_chips)); |
1381 | ||
1382 | nmk_gpio_chips[nmk_chip->bank] = nmk_chip; | |
513c27f8 | 1383 | |
3e3c62ca | 1384 | platform_set_drvdata(dev, nmk_chip); |
2ec1d359 | 1385 | |
51f58c68 | 1386 | if (!np) |
6054b9ca | 1387 | irq_start = NOMADIK_GPIO_TO_IRQ(pdata->first_gpio); |
38843e29 | 1388 | nmk_chip->domain = irq_domain_add_simple(np, |
6054b9ca LW |
1389 | NMK_GPIO_PER_CHIP, irq_start, |
1390 | &nmk_gpio_irq_simple_ops, nmk_chip); | |
a60b57ed | 1391 | if (!nmk_chip->domain) { |
2ee38d4d | 1392 | dev_err(&dev->dev, "failed to create irqdomain\n"); |
a60b57ed | 1393 | ret = -ENOSYS; |
5e754f33 | 1394 | goto out; |
a60b57ed LJ |
1395 | } |
1396 | ||
2ec1d359 AR |
1397 | nmk_gpio_init_irq(nmk_chip); |
1398 | ||
513c27f8 LJ |
1399 | dev_info(&dev->dev, "at address %p\n", nmk_chip->addr); |
1400 | ||
2ec1d359 AR |
1401 | return 0; |
1402 | ||
3e3c62ca | 1403 | out: |
2ec1d359 AR |
1404 | dev_err(&dev->dev, "Failure %i for GPIO %i-%i\n", ret, |
1405 | pdata->first_gpio, pdata->first_gpio+31); | |
513c27f8 | 1406 | |
2ec1d359 AR |
1407 | return ret; |
1408 | } | |
1409 | ||
e98ea774 LW |
1410 | static int nmk_get_groups_cnt(struct pinctrl_dev *pctldev) |
1411 | { | |
1412 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1413 | ||
1414 | return npct->soc->ngroups; | |
1415 | } | |
1416 | ||
1417 | static const char *nmk_get_group_name(struct pinctrl_dev *pctldev, | |
1418 | unsigned selector) | |
1419 | { | |
1420 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1421 | ||
1422 | return npct->soc->groups[selector].name; | |
1423 | } | |
1424 | ||
1425 | static int nmk_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector, | |
1426 | const unsigned **pins, | |
1427 | unsigned *num_pins) | |
1428 | { | |
1429 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1430 | ||
1431 | *pins = npct->soc->groups[selector].pins; | |
1432 | *num_pins = npct->soc->groups[selector].npins; | |
1433 | return 0; | |
1434 | } | |
1435 | ||
24cbdd75 LW |
1436 | static struct pinctrl_gpio_range * |
1437 | nmk_match_gpio_range(struct pinctrl_dev *pctldev, unsigned offset) | |
1438 | { | |
1439 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1440 | int i; | |
1441 | ||
1442 | for (i = 0; i < npct->soc->gpio_num_ranges; i++) { | |
1443 | struct pinctrl_gpio_range *range; | |
1444 | ||
1445 | range = &npct->soc->gpio_ranges[i]; | |
1446 | if (offset >= range->pin_base && | |
1447 | offset <= (range->pin_base + range->npins - 1)) | |
1448 | return range; | |
1449 | } | |
1450 | return NULL; | |
1451 | } | |
1452 | ||
e98ea774 LW |
1453 | static void nmk_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, |
1454 | unsigned offset) | |
1455 | { | |
24cbdd75 LW |
1456 | struct pinctrl_gpio_range *range; |
1457 | struct gpio_chip *chip; | |
1458 | ||
1459 | range = nmk_match_gpio_range(pctldev, offset); | |
1460 | if (!range || !range->gc) { | |
1461 | seq_printf(s, "invalid pin offset"); | |
1462 | return; | |
1463 | } | |
1464 | chip = range->gc; | |
1465 | nmk_gpio_dbg_show_one(s, chip, offset - chip->base, offset); | |
e98ea774 LW |
1466 | } |
1467 | ||
1468 | static struct pinctrl_ops nmk_pinctrl_ops = { | |
1469 | .get_groups_count = nmk_get_groups_cnt, | |
1470 | .get_group_name = nmk_get_group_name, | |
1471 | .get_group_pins = nmk_get_group_pins, | |
1472 | .pin_dbg_show = nmk_pin_dbg_show, | |
1473 | }; | |
1474 | ||
dbfe8ca2 LW |
1475 | static int nmk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) |
1476 | { | |
1477 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1478 | ||
1479 | return npct->soc->nfunctions; | |
1480 | } | |
1481 | ||
1482 | static const char *nmk_pmx_get_func_name(struct pinctrl_dev *pctldev, | |
1483 | unsigned function) | |
1484 | { | |
1485 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1486 | ||
1487 | return npct->soc->functions[function].name; | |
1488 | } | |
1489 | ||
1490 | static int nmk_pmx_get_func_groups(struct pinctrl_dev *pctldev, | |
1491 | unsigned function, | |
1492 | const char * const **groups, | |
1493 | unsigned * const num_groups) | |
1494 | { | |
1495 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1496 | ||
1497 | *groups = npct->soc->functions[function].groups; | |
1498 | *num_groups = npct->soc->functions[function].ngroups; | |
1499 | ||
1500 | return 0; | |
1501 | } | |
1502 | ||
1503 | static int nmk_pmx_enable(struct pinctrl_dev *pctldev, unsigned function, | |
1504 | unsigned group) | |
1505 | { | |
1506 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1507 | const struct nmk_pingroup *g; | |
1508 | static unsigned int slpm[NUM_BANKS]; | |
1509 | unsigned long flags; | |
1510 | bool glitch; | |
1511 | int ret = -EINVAL; | |
1512 | int i; | |
1513 | ||
1514 | g = &npct->soc->groups[group]; | |
1515 | ||
1516 | if (g->altsetting < 0) | |
1517 | return -EINVAL; | |
1518 | ||
1519 | dev_dbg(npct->dev, "enable group %s, %u pins\n", g->name, g->npins); | |
1520 | ||
daf73174 LW |
1521 | /* |
1522 | * If we're setting altfunc C by setting both AFSLA and AFSLB to 1, | |
1523 | * we may pass through an undesired state. In this case we take | |
1524 | * some extra care. | |
1525 | * | |
1526 | * Safe sequence used to switch IOs between GPIO and Alternate-C mode: | |
1527 | * - Save SLPM registers (since we have a shadow register in the | |
1528 | * nmk_chip we're using that as backup) | |
1529 | * - Set SLPM=0 for the IOs you want to switch and others to 1 | |
1530 | * - Configure the GPIO registers for the IOs that are being switched | |
1531 | * - Set IOFORCE=1 | |
1532 | * - Modify the AFLSA/B registers for the IOs that are being switched | |
1533 | * - Set IOFORCE=0 | |
1534 | * - Restore SLPM registers | |
1535 | * - Any spurious wake up event during switch sequence to be ignored | |
1536 | * and cleared | |
1537 | * | |
1538 | * We REALLY need to save ALL slpm registers, because the external | |
1539 | * IOFORCE will switch *all* ports to their sleepmode setting to as | |
1540 | * to avoid glitches. (Not just one port!) | |
1541 | */ | |
c22df08c | 1542 | glitch = ((g->altsetting & NMK_GPIO_ALT_C) == NMK_GPIO_ALT_C); |
dbfe8ca2 LW |
1543 | |
1544 | if (glitch) { | |
1545 | spin_lock_irqsave(&nmk_gpio_slpm_lock, flags); | |
1546 | ||
1547 | /* Initially don't put any pins to sleep when switching */ | |
1548 | memset(slpm, 0xff, sizeof(slpm)); | |
1549 | ||
1550 | /* | |
1551 | * Then mask the pins that need to be sleeping now when we're | |
1552 | * switching to the ALT C function. | |
1553 | */ | |
1554 | for (i = 0; i < g->npins; i++) | |
1555 | slpm[g->pins[i] / NMK_GPIO_PER_CHIP] &= ~BIT(g->pins[i]); | |
1556 | nmk_gpio_glitch_slpm_init(slpm); | |
1557 | } | |
1558 | ||
1559 | for (i = 0; i < g->npins; i++) { | |
1560 | struct pinctrl_gpio_range *range; | |
1561 | struct nmk_gpio_chip *nmk_chip; | |
1562 | struct gpio_chip *chip; | |
1563 | unsigned bit; | |
1564 | ||
1565 | range = nmk_match_gpio_range(pctldev, g->pins[i]); | |
1566 | if (!range) { | |
1567 | dev_err(npct->dev, | |
1568 | "invalid pin offset %d in group %s at index %d\n", | |
1569 | g->pins[i], g->name, i); | |
1570 | goto out_glitch; | |
1571 | } | |
1572 | if (!range->gc) { | |
1573 | dev_err(npct->dev, "GPIO chip missing in range for pin offset %d in group %s at index %d\n", | |
1574 | g->pins[i], g->name, i); | |
1575 | goto out_glitch; | |
1576 | } | |
1577 | chip = range->gc; | |
1578 | nmk_chip = container_of(chip, struct nmk_gpio_chip, chip); | |
1579 | dev_dbg(npct->dev, "setting pin %d to altsetting %d\n", g->pins[i], g->altsetting); | |
1580 | ||
1581 | clk_enable(nmk_chip->clk); | |
1582 | bit = g->pins[i] % NMK_GPIO_PER_CHIP; | |
1583 | /* | |
1584 | * If the pin is switching to altfunc, and there was an | |
1585 | * interrupt installed on it which has been lazy disabled, | |
1586 | * actually mask the interrupt to prevent spurious interrupts | |
1587 | * that would occur while the pin is under control of the | |
1588 | * peripheral. Only SKE does this. | |
1589 | */ | |
1590 | nmk_gpio_disable_lazy_irq(nmk_chip, bit); | |
1591 | ||
c22df08c JNG |
1592 | __nmk_gpio_set_mode_safe(nmk_chip, bit, |
1593 | (g->altsetting & NMK_GPIO_ALT_C), glitch); | |
dbfe8ca2 | 1594 | clk_disable(nmk_chip->clk); |
c22df08c JNG |
1595 | |
1596 | /* | |
1597 | * Call PRCM GPIOCR config function in case ALTC | |
1598 | * has been selected: | |
1599 | * - If selection is a ALTCx, some bits in PRCM GPIOCR registers | |
1600 | * must be set. | |
1601 | * - If selection is pure ALTC and previous selection was ALTCx, | |
1602 | * then some bits in PRCM GPIOCR registers must be cleared. | |
1603 | */ | |
1604 | if ((g->altsetting & NMK_GPIO_ALT_C) == NMK_GPIO_ALT_C) | |
1605 | nmk_prcm_altcx_set_mode(npct, g->pins[i], | |
1606 | g->altsetting >> NMK_GPIO_ALT_CX_SHIFT); | |
dbfe8ca2 LW |
1607 | } |
1608 | ||
1609 | /* When all pins are successfully reconfigured we get here */ | |
1610 | ret = 0; | |
1611 | ||
1612 | out_glitch: | |
1613 | if (glitch) { | |
1614 | nmk_gpio_glitch_slpm_restore(slpm); | |
1615 | spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); | |
1616 | } | |
1617 | ||
1618 | return ret; | |
1619 | } | |
1620 | ||
1621 | static void nmk_pmx_disable(struct pinctrl_dev *pctldev, | |
1622 | unsigned function, unsigned group) | |
1623 | { | |
1624 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1625 | const struct nmk_pingroup *g; | |
1626 | ||
1627 | g = &npct->soc->groups[group]; | |
1628 | ||
1629 | if (g->altsetting < 0) | |
1630 | return; | |
1631 | ||
1632 | /* Poke out the mux, set the pin to some default state? */ | |
1633 | dev_dbg(npct->dev, "disable group %s, %u pins\n", g->name, g->npins); | |
1634 | } | |
1635 | ||
1636 | int nmk_gpio_request_enable(struct pinctrl_dev *pctldev, | |
1637 | struct pinctrl_gpio_range *range, | |
1638 | unsigned offset) | |
1639 | { | |
1640 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1641 | struct nmk_gpio_chip *nmk_chip; | |
1642 | struct gpio_chip *chip; | |
1643 | unsigned bit; | |
1644 | ||
1645 | if (!range) { | |
1646 | dev_err(npct->dev, "invalid range\n"); | |
1647 | return -EINVAL; | |
1648 | } | |
1649 | if (!range->gc) { | |
1650 | dev_err(npct->dev, "missing GPIO chip in range\n"); | |
1651 | return -EINVAL; | |
1652 | } | |
1653 | chip = range->gc; | |
1654 | nmk_chip = container_of(chip, struct nmk_gpio_chip, chip); | |
1655 | ||
1656 | dev_dbg(npct->dev, "enable pin %u as GPIO\n", offset); | |
1657 | ||
1658 | clk_enable(nmk_chip->clk); | |
1659 | bit = offset % NMK_GPIO_PER_CHIP; | |
1660 | /* There is no glitch when converting any pin to GPIO */ | |
1661 | __nmk_gpio_set_mode(nmk_chip, bit, NMK_GPIO_ALT_GPIO); | |
1662 | clk_disable(nmk_chip->clk); | |
1663 | ||
1664 | return 0; | |
1665 | } | |
1666 | ||
1667 | void nmk_gpio_disable_free(struct pinctrl_dev *pctldev, | |
1668 | struct pinctrl_gpio_range *range, | |
1669 | unsigned offset) | |
1670 | { | |
1671 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1672 | ||
1673 | dev_dbg(npct->dev, "disable pin %u as GPIO\n", offset); | |
1674 | /* Set the pin to some default state, GPIO is usually default */ | |
1675 | } | |
1676 | ||
1677 | static struct pinmux_ops nmk_pinmux_ops = { | |
1678 | .get_functions_count = nmk_pmx_get_funcs_cnt, | |
1679 | .get_function_name = nmk_pmx_get_func_name, | |
1680 | .get_function_groups = nmk_pmx_get_func_groups, | |
1681 | .enable = nmk_pmx_enable, | |
1682 | .disable = nmk_pmx_disable, | |
1683 | .gpio_request_enable = nmk_gpio_request_enable, | |
1684 | .gpio_disable_free = nmk_gpio_disable_free, | |
1685 | }; | |
1686 | ||
d41af627 LW |
1687 | int nmk_pin_config_get(struct pinctrl_dev *pctldev, |
1688 | unsigned pin, | |
1689 | unsigned long *config) | |
1690 | { | |
1691 | /* Not implemented */ | |
1692 | return -EINVAL; | |
1693 | } | |
1694 | ||
1695 | int nmk_pin_config_set(struct pinctrl_dev *pctldev, | |
1696 | unsigned pin, | |
1697 | unsigned long config) | |
1698 | { | |
1699 | static const char *pullnames[] = { | |
1700 | [NMK_GPIO_PULL_NONE] = "none", | |
1701 | [NMK_GPIO_PULL_UP] = "up", | |
1702 | [NMK_GPIO_PULL_DOWN] = "down", | |
1703 | [3] /* illegal */ = "??" | |
1704 | }; | |
1705 | static const char *slpmnames[] = { | |
1706 | [NMK_GPIO_SLPM_INPUT] = "input/wakeup", | |
1707 | [NMK_GPIO_SLPM_NOCHANGE] = "no-change/no-wakeup", | |
1708 | }; | |
1709 | struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
1710 | struct nmk_gpio_chip *nmk_chip; | |
1711 | struct pinctrl_gpio_range *range; | |
1712 | struct gpio_chip *chip; | |
1713 | unsigned bit; | |
1714 | ||
1715 | /* | |
1716 | * The pin config contains pin number and altfunction fields, here | |
1717 | * we just ignore that part. It's being handled by the framework and | |
1718 | * pinmux callback respectively. | |
1719 | */ | |
1720 | pin_cfg_t cfg = (pin_cfg_t) config; | |
1721 | int pull = PIN_PULL(cfg); | |
1722 | int slpm = PIN_SLPM(cfg); | |
1723 | int output = PIN_DIR(cfg); | |
1724 | int val = PIN_VAL(cfg); | |
1725 | bool lowemi = PIN_LOWEMI(cfg); | |
1726 | bool gpiomode = PIN_GPIOMODE(cfg); | |
1727 | bool sleep = PIN_SLEEPMODE(cfg); | |
1728 | ||
1729 | range = nmk_match_gpio_range(pctldev, pin); | |
1730 | if (!range) { | |
1731 | dev_err(npct->dev, "invalid pin offset %d\n", pin); | |
1732 | return -EINVAL; | |
1733 | } | |
1734 | if (!range->gc) { | |
1735 | dev_err(npct->dev, "GPIO chip missing in range for pin %d\n", | |
1736 | pin); | |
1737 | return -EINVAL; | |
1738 | } | |
1739 | chip = range->gc; | |
1740 | nmk_chip = container_of(chip, struct nmk_gpio_chip, chip); | |
1741 | ||
1742 | if (sleep) { | |
1743 | int slpm_pull = PIN_SLPM_PULL(cfg); | |
1744 | int slpm_output = PIN_SLPM_DIR(cfg); | |
1745 | int slpm_val = PIN_SLPM_VAL(cfg); | |
1746 | ||
1747 | /* All pins go into GPIO mode at sleep */ | |
1748 | gpiomode = true; | |
1749 | ||
1750 | /* | |
1751 | * The SLPM_* values are normal values + 1 to allow zero to | |
1752 | * mean "same as normal". | |
1753 | */ | |
1754 | if (slpm_pull) | |
1755 | pull = slpm_pull - 1; | |
1756 | if (slpm_output) | |
1757 | output = slpm_output - 1; | |
1758 | if (slpm_val) | |
1759 | val = slpm_val - 1; | |
1760 | ||
1761 | dev_dbg(nmk_chip->chip.dev, "pin %d: sleep pull %s, dir %s, val %s\n", | |
1762 | pin, | |
1763 | slpm_pull ? pullnames[pull] : "same", | |
1764 | slpm_output ? (output ? "output" : "input") : "same", | |
1765 | slpm_val ? (val ? "high" : "low") : "same"); | |
1766 | } | |
1767 | ||
1768 | dev_dbg(nmk_chip->chip.dev, "pin %d [%#lx]: pull %s, slpm %s (%s%s), lowemi %s\n", | |
1769 | pin, cfg, pullnames[pull], slpmnames[slpm], | |
1770 | output ? "output " : "input", | |
1771 | output ? (val ? "high" : "low") : "", | |
1772 | lowemi ? "on" : "off" ); | |
1773 | ||
1774 | clk_enable(nmk_chip->clk); | |
1775 | bit = pin % NMK_GPIO_PER_CHIP; | |
1776 | if (gpiomode) | |
1777 | /* No glitch when going to GPIO mode */ | |
1778 | __nmk_gpio_set_mode(nmk_chip, bit, NMK_GPIO_ALT_GPIO); | |
1779 | if (output) | |
1780 | __nmk_gpio_make_output(nmk_chip, bit, val); | |
1781 | else { | |
1782 | __nmk_gpio_make_input(nmk_chip, bit); | |
1783 | __nmk_gpio_set_pull(nmk_chip, bit, pull); | |
1784 | } | |
1785 | /* TODO: isn't this only applicable on output pins? */ | |
1786 | __nmk_gpio_set_lowemi(nmk_chip, bit, lowemi); | |
1787 | ||
1788 | __nmk_gpio_set_slpm(nmk_chip, bit, slpm); | |
1789 | clk_disable(nmk_chip->clk); | |
1790 | return 0; | |
1791 | } | |
1792 | ||
1793 | static struct pinconf_ops nmk_pinconf_ops = { | |
1794 | .pin_config_get = nmk_pin_config_get, | |
1795 | .pin_config_set = nmk_pin_config_set, | |
1796 | }; | |
1797 | ||
e98ea774 LW |
1798 | static struct pinctrl_desc nmk_pinctrl_desc = { |
1799 | .name = "pinctrl-nomadik", | |
1800 | .pctlops = &nmk_pinctrl_ops, | |
dbfe8ca2 | 1801 | .pmxops = &nmk_pinmux_ops, |
d41af627 | 1802 | .confops = &nmk_pinconf_ops, |
e98ea774 LW |
1803 | .owner = THIS_MODULE, |
1804 | }; | |
1805 | ||
855f80cd LJ |
1806 | static const struct of_device_id nmk_pinctrl_match[] = { |
1807 | { | |
1808 | .compatible = "stericsson,nmk_pinctrl", | |
1809 | .data = (void *)PINCTRL_NMK_DB8500, | |
1810 | }, | |
1811 | {}, | |
1812 | }; | |
1813 | ||
e98ea774 LW |
1814 | static int __devinit nmk_pinctrl_probe(struct platform_device *pdev) |
1815 | { | |
1816 | const struct platform_device_id *platid = platform_get_device_id(pdev); | |
855f80cd | 1817 | struct device_node *np = pdev->dev.of_node; |
e98ea774 | 1818 | struct nmk_pinctrl *npct; |
855f80cd | 1819 | unsigned int version = 0; |
e98ea774 LW |
1820 | int i; |
1821 | ||
1822 | npct = devm_kzalloc(&pdev->dev, sizeof(*npct), GFP_KERNEL); | |
1823 | if (!npct) | |
1824 | return -ENOMEM; | |
1825 | ||
855f80cd LJ |
1826 | if (platid) |
1827 | version = platid->driver_data; | |
1828 | else if (np) | |
1829 | version = (unsigned int) | |
1830 | of_match_device(nmk_pinctrl_match, &pdev->dev)->data; | |
1831 | ||
e98ea774 | 1832 | /* Poke in other ASIC variants here */ |
f79c5ed9 LW |
1833 | if (version == PINCTRL_NMK_STN8815) |
1834 | nmk_pinctrl_stn8815_init(&npct->soc); | |
855f80cd | 1835 | if (version == PINCTRL_NMK_DB8500) |
e98ea774 | 1836 | nmk_pinctrl_db8500_init(&npct->soc); |
45a1b531 PC |
1837 | if (version == PINCTRL_NMK_DB8540) |
1838 | nmk_pinctrl_db8540_init(&npct->soc); | |
e98ea774 LW |
1839 | |
1840 | /* | |
1841 | * We need all the GPIO drivers to probe FIRST, or we will not be able | |
1842 | * to obtain references to the struct gpio_chip * for them, and we | |
1843 | * need this to proceed. | |
1844 | */ | |
1845 | for (i = 0; i < npct->soc->gpio_num_ranges; i++) { | |
1846 | if (!nmk_gpio_chips[i]) { | |
1847 | dev_warn(&pdev->dev, "GPIO chip %d not registered yet\n", i); | |
e98ea774 LW |
1848 | return -EPROBE_DEFER; |
1849 | } | |
1850 | npct->soc->gpio_ranges[i].gc = &nmk_gpio_chips[i]->chip; | |
1851 | } | |
1852 | ||
1853 | nmk_pinctrl_desc.pins = npct->soc->pins; | |
1854 | nmk_pinctrl_desc.npins = npct->soc->npins; | |
1855 | npct->dev = &pdev->dev; | |
1856 | npct->pctl = pinctrl_register(&nmk_pinctrl_desc, &pdev->dev, npct); | |
1857 | if (!npct->pctl) { | |
1858 | dev_err(&pdev->dev, "could not register Nomadik pinctrl driver\n"); | |
1859 | return -EINVAL; | |
1860 | } | |
1861 | ||
1862 | /* We will handle a range of GPIO pins */ | |
1863 | for (i = 0; i < npct->soc->gpio_num_ranges; i++) | |
1864 | pinctrl_add_gpio_range(npct->pctl, &npct->soc->gpio_ranges[i]); | |
1865 | ||
1866 | platform_set_drvdata(pdev, npct); | |
1867 | dev_info(&pdev->dev, "initialized Nomadik pin control driver\n"); | |
1868 | ||
1869 | return 0; | |
1870 | } | |
1871 | ||
513c27f8 LJ |
1872 | static const struct of_device_id nmk_gpio_match[] = { |
1873 | { .compatible = "st,nomadik-gpio", }, | |
1874 | {} | |
1875 | }; | |
1876 | ||
3e3c62ca RV |
1877 | static struct platform_driver nmk_gpio_driver = { |
1878 | .driver = { | |
2ec1d359 AR |
1879 | .owner = THIS_MODULE, |
1880 | .name = "gpio", | |
513c27f8 | 1881 | .of_match_table = nmk_gpio_match, |
5317e4d1 | 1882 | }, |
2ec1d359 | 1883 | .probe = nmk_gpio_probe, |
2ec1d359 AR |
1884 | }; |
1885 | ||
e98ea774 LW |
1886 | static const struct platform_device_id nmk_pinctrl_id[] = { |
1887 | { "pinctrl-stn8815", PINCTRL_NMK_STN8815 }, | |
1888 | { "pinctrl-db8500", PINCTRL_NMK_DB8500 }, | |
45a1b531 | 1889 | { "pinctrl-db8540", PINCTRL_NMK_DB8540 }, |
e98ea774 LW |
1890 | }; |
1891 | ||
1892 | static struct platform_driver nmk_pinctrl_driver = { | |
1893 | .driver = { | |
1894 | .owner = THIS_MODULE, | |
1895 | .name = "pinctrl-nomadik", | |
855f80cd | 1896 | .of_match_table = nmk_pinctrl_match, |
e98ea774 LW |
1897 | }, |
1898 | .probe = nmk_pinctrl_probe, | |
1899 | .id_table = nmk_pinctrl_id, | |
1900 | }; | |
1901 | ||
2ec1d359 AR |
1902 | static int __init nmk_gpio_init(void) |
1903 | { | |
e98ea774 LW |
1904 | int ret; |
1905 | ||
1906 | ret = platform_driver_register(&nmk_gpio_driver); | |
1907 | if (ret) | |
1908 | return ret; | |
1909 | return platform_driver_register(&nmk_pinctrl_driver); | |
2ec1d359 AR |
1910 | } |
1911 | ||
33f45ea9 | 1912 | core_initcall(nmk_gpio_init); |
2ec1d359 AR |
1913 | |
1914 | MODULE_AUTHOR("Prafulla WADASKAR and Alessandro Rubini"); | |
1915 | MODULE_DESCRIPTION("Nomadik GPIO Driver"); | |
1916 | MODULE_LICENSE("GPL"); |