1 // SPDX-License-Identifier: GPL-2.0-only
3 * at91 pinctrl driver based on at91 pinmux core
5 * Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
10 #include <linux/gpio/driver.h>
11 #include <linux/init.h>
12 #include <linux/interrupt.h>
15 #include <linux/of_address.h>
16 #include <linux/of_device.h>
17 #include <linux/of_irq.h>
19 #include <linux/seq_file.h>
20 #include <linux/slab.h>
21 #include <linux/string_helpers.h>
23 /* Since we request GPIOs from ourself */
24 #include <linux/pinctrl/consumer.h>
25 #include <linux/pinctrl/machine.h>
26 #include <linux/pinctrl/pinconf.h>
27 #include <linux/pinctrl/pinctrl.h>
28 #include <linux/pinctrl/pinmux.h>
30 #include "pinctrl-at91.h"
33 #define MAX_GPIO_BANKS 5
34 #define MAX_NB_GPIO_PER_BANK 32
36 struct at91_pinctrl_mux_ops;
39 * struct at91_gpio_chip: at91 gpio chip
42 * @next: bank sharing same clock
43 * @pioc_hwirq: PIO bank interrupt identifier on AIC
44 * @pioc_virq: PIO bank Linux virtual interrupt
45 * @regbase: PIO bank virtual address
46 * @clock: associated clock
47 * @ops: at91 pinctrl mux ops
48 * @wakeups: wakeup interrupts
49 * @backups: interrupts disabled in suspend
50 * @id: gpio chip identifier
52 struct at91_gpio_chip {
53 struct gpio_chip chip;
54 struct pinctrl_gpio_range range;
55 struct at91_gpio_chip *next;
58 void __iomem *regbase;
60 const struct at91_pinctrl_mux_ops *ops;
66 static struct at91_gpio_chip *gpio_chips[MAX_GPIO_BANKS];
68 static int gpio_banks;
70 #define PULL_UP (1 << 0)
71 #define MULTI_DRIVE (1 << 1)
72 #define DEGLITCH (1 << 2)
73 #define PULL_DOWN (1 << 3)
74 #define DIS_SCHMIT (1 << 4)
75 #define DRIVE_STRENGTH_SHIFT 5
76 #define DRIVE_STRENGTH_MASK 0x3
77 #define DRIVE_STRENGTH (DRIVE_STRENGTH_MASK << DRIVE_STRENGTH_SHIFT)
78 #define OUTPUT (1 << 7)
79 #define OUTPUT_VAL_SHIFT 8
80 #define OUTPUT_VAL (0x1 << OUTPUT_VAL_SHIFT)
81 #define SLEWRATE_SHIFT 9
82 #define SLEWRATE_MASK 0x1
83 #define SLEWRATE (SLEWRATE_MASK << SLEWRATE_SHIFT)
84 #define DEBOUNCE (1 << 16)
85 #define DEBOUNCE_VAL_SHIFT 17
86 #define DEBOUNCE_VAL (0x3fff << DEBOUNCE_VAL_SHIFT)
89 * These defines will translated the dt binding settings to our internal
90 * settings. They are not necessarily the same value as the register setting.
91 * The actual drive strength current of low, medium and high must be looked up
92 * from the corresponding device datasheet. This value is different for pins
93 * that are even in the same banks. It is also dependent on VCC.
94 * DRIVE_STRENGTH_DEFAULT is just a placeholder to avoid changing the drive
95 * strength when there is no dt config for it.
97 enum drive_strength_bit {
98 DRIVE_STRENGTH_BIT_DEF,
99 DRIVE_STRENGTH_BIT_LOW,
100 DRIVE_STRENGTH_BIT_MED,
101 DRIVE_STRENGTH_BIT_HI,
104 #define DRIVE_STRENGTH_BIT_MSK(name) (DRIVE_STRENGTH_BIT_##name << \
105 DRIVE_STRENGTH_SHIFT)
112 #define SLEWRATE_BIT_MSK(name) (SLEWRATE_BIT_##name << SLEWRATE_SHIFT)
115 * struct at91_pmx_func - describes AT91 pinmux functions
116 * @name: the name of this specific function
117 * @groups: corresponding pin groups
118 * @ngroups: the number of groups
120 struct at91_pmx_func {
128 AT91_MUX_PERIPH_A = 1,
129 AT91_MUX_PERIPH_B = 2,
130 AT91_MUX_PERIPH_C = 3,
131 AT91_MUX_PERIPH_D = 4,
135 * struct at91_pmx_pin - describes an At91 pin mux
136 * @bank: the bank of the pin
137 * @pin: the pin number in the @bank
138 * @mux: the mux mode : gpio or periph_x of the pin i.e. alternate function.
139 * @conf: the configuration of the pin: PULL_UP, MULTIDRIVE etc...
141 struct at91_pmx_pin {
149 * struct at91_pin_group - describes an At91 pin group
150 * @name: the name of this specific pin group
151 * @pins_conf: the mux mode for each pin in this group. The size of this
152 * array is the same as pins.
153 * @pins: an array of discrete physical pins used in this group, taken
154 * from the driver-local pin enumeration space
155 * @npins: the number of pins in this group array, i.e. the number of
156 * elements in .pins so we can iterate over that array
158 struct at91_pin_group {
160 struct at91_pmx_pin *pins_conf;
166 * struct at91_pinctrl_mux_ops - describes an AT91 mux ops group
167 * on new IP with support for periph C and D the way to mux in
168 * periph A and B has changed
169 * So provide the right call back
170 * if not present means the IP does not support it
171 * @get_periph: return the periph mode configured
172 * @mux_A_periph: mux as periph A
173 * @mux_B_periph: mux as periph B
174 * @mux_C_periph: mux as periph C
175 * @mux_D_periph: mux as periph D
176 * @get_deglitch: get deglitch status
177 * @set_deglitch: enable/disable deglitch
178 * @get_debounce: get debounce status
179 * @set_debounce: enable/disable debounce
180 * @get_pulldown: get pulldown status
181 * @set_pulldown: enable/disable pulldown
182 * @get_schmitt_trig: get schmitt trigger status
183 * @disable_schmitt_trig: disable schmitt trigger
184 * @get_drivestrength: get driver strength
185 * @set_drivestrength: set driver strength
186 * @get_slewrate: get slew rate
187 * @set_slewrate: set slew rate
188 * @irq_type: return irq type
190 struct at91_pinctrl_mux_ops {
191 enum at91_mux (*get_periph)(void __iomem *pio, unsigned mask);
192 void (*mux_A_periph)(void __iomem *pio, unsigned mask);
193 void (*mux_B_periph)(void __iomem *pio, unsigned mask);
194 void (*mux_C_periph)(void __iomem *pio, unsigned mask);
195 void (*mux_D_periph)(void __iomem *pio, unsigned mask);
196 bool (*get_deglitch)(void __iomem *pio, unsigned pin);
197 void (*set_deglitch)(void __iomem *pio, unsigned mask, bool is_on);
198 bool (*get_debounce)(void __iomem *pio, unsigned pin, u32 *div);
199 void (*set_debounce)(void __iomem *pio, unsigned mask, bool is_on, u32 div);
200 bool (*get_pulldown)(void __iomem *pio, unsigned pin);
201 void (*set_pulldown)(void __iomem *pio, unsigned mask, bool is_on);
202 bool (*get_schmitt_trig)(void __iomem *pio, unsigned pin);
203 void (*disable_schmitt_trig)(void __iomem *pio, unsigned mask);
204 unsigned (*get_drivestrength)(void __iomem *pio, unsigned pin);
205 void (*set_drivestrength)(void __iomem *pio, unsigned pin,
207 unsigned (*get_slewrate)(void __iomem *pio, unsigned pin);
208 void (*set_slewrate)(void __iomem *pio, unsigned pin, u32 slewrate);
210 int (*irq_type)(struct irq_data *d, unsigned type);
213 static int gpio_irq_type(struct irq_data *d, unsigned type);
214 static int alt_gpio_irq_type(struct irq_data *d, unsigned type);
216 struct at91_pinctrl {
218 struct pinctrl_dev *pctl;
225 struct at91_pmx_func *functions;
228 struct at91_pin_group *groups;
231 const struct at91_pinctrl_mux_ops *ops;
234 static inline const struct at91_pin_group *at91_pinctrl_find_group_by_name(
235 const struct at91_pinctrl *info,
238 const struct at91_pin_group *grp = NULL;
241 for (i = 0; i < info->ngroups; i++) {
242 if (strcmp(info->groups[i].name, name))
245 grp = &info->groups[i];
246 dev_dbg(info->dev, "%s: %d 0:%d\n", name, grp->npins, grp->pins[0]);
253 static int at91_get_groups_count(struct pinctrl_dev *pctldev)
255 struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
257 return info->ngroups;
260 static const char *at91_get_group_name(struct pinctrl_dev *pctldev,
263 struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
265 return info->groups[selector].name;
268 static int at91_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
269 const unsigned **pins,
272 struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
274 if (selector >= info->ngroups)
277 *pins = info->groups[selector].pins;
278 *npins = info->groups[selector].npins;
283 static void at91_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
286 seq_printf(s, "%s", dev_name(pctldev->dev));
289 static int at91_dt_node_to_map(struct pinctrl_dev *pctldev,
290 struct device_node *np,
291 struct pinctrl_map **map, unsigned *num_maps)
293 struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
294 const struct at91_pin_group *grp;
295 struct pinctrl_map *new_map;
296 struct device_node *parent;
301 * first find the group of this node and check if we need to create
302 * config maps for pins
304 grp = at91_pinctrl_find_group_by_name(info, np->name);
306 dev_err(info->dev, "unable to find group for node %pOFn\n",
311 map_num += grp->npins;
312 new_map = devm_kcalloc(pctldev->dev, map_num, sizeof(*new_map),
321 parent = of_get_parent(np);
323 devm_kfree(pctldev->dev, new_map);
326 new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
327 new_map[0].data.mux.function = parent->name;
328 new_map[0].data.mux.group = np->name;
331 /* create config map */
333 for (i = 0; i < grp->npins; i++) {
334 new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
335 new_map[i].data.configs.group_or_pin =
336 pin_get_name(pctldev, grp->pins[i]);
337 new_map[i].data.configs.configs = &grp->pins_conf[i].conf;
338 new_map[i].data.configs.num_configs = 1;
341 dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
342 (*map)->data.mux.function, (*map)->data.mux.group, map_num);
347 static void at91_dt_free_map(struct pinctrl_dev *pctldev,
348 struct pinctrl_map *map, unsigned num_maps)
352 static const struct pinctrl_ops at91_pctrl_ops = {
353 .get_groups_count = at91_get_groups_count,
354 .get_group_name = at91_get_group_name,
355 .get_group_pins = at91_get_group_pins,
356 .pin_dbg_show = at91_pin_dbg_show,
357 .dt_node_to_map = at91_dt_node_to_map,
358 .dt_free_map = at91_dt_free_map,
361 static void __iomem *pin_to_controller(struct at91_pinctrl *info,
364 if (!gpio_chips[bank])
367 return gpio_chips[bank]->regbase;
370 static inline int pin_to_bank(unsigned pin)
372 return pin /= MAX_NB_GPIO_PER_BANK;
375 static unsigned pin_to_mask(unsigned int pin)
380 static unsigned two_bit_pin_value_shift_amount(unsigned int pin)
382 /* return the shift value for a pin for "two bit" per pin registers,
383 * i.e. drive strength */
384 return 2*((pin >= MAX_NB_GPIO_PER_BANK/2)
385 ? pin - MAX_NB_GPIO_PER_BANK/2 : pin);
388 static unsigned sama5d3_get_drive_register(unsigned int pin)
390 /* drive strength is split between two registers
391 * with two bits per pin */
392 return (pin >= MAX_NB_GPIO_PER_BANK/2)
393 ? SAMA5D3_PIO_DRIVER2 : SAMA5D3_PIO_DRIVER1;
396 static unsigned at91sam9x5_get_drive_register(unsigned int pin)
398 /* drive strength is split between two registers
399 * with two bits per pin */
400 return (pin >= MAX_NB_GPIO_PER_BANK/2)
401 ? AT91SAM9X5_PIO_DRIVER2 : AT91SAM9X5_PIO_DRIVER1;
404 static void at91_mux_disable_interrupt(void __iomem *pio, unsigned mask)
406 writel_relaxed(mask, pio + PIO_IDR);
409 static unsigned at91_mux_get_pullup(void __iomem *pio, unsigned pin)
411 return !((readl_relaxed(pio + PIO_PUSR) >> pin) & 0x1);
414 static void at91_mux_set_pullup(void __iomem *pio, unsigned mask, bool on)
417 writel_relaxed(mask, pio + PIO_PPDDR);
419 writel_relaxed(mask, pio + (on ? PIO_PUER : PIO_PUDR));
422 static bool at91_mux_get_output(void __iomem *pio, unsigned int pin, bool *val)
424 *val = (readl_relaxed(pio + PIO_ODSR) >> pin) & 0x1;
425 return (readl_relaxed(pio + PIO_OSR) >> pin) & 0x1;
428 static void at91_mux_set_output(void __iomem *pio, unsigned int mask,
429 bool is_on, bool val)
431 writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR));
432 writel_relaxed(mask, pio + (is_on ? PIO_OER : PIO_ODR));
435 static unsigned at91_mux_get_multidrive(void __iomem *pio, unsigned pin)
437 return (readl_relaxed(pio + PIO_MDSR) >> pin) & 0x1;
440 static void at91_mux_set_multidrive(void __iomem *pio, unsigned mask, bool on)
442 writel_relaxed(mask, pio + (on ? PIO_MDER : PIO_MDDR));
445 static void at91_mux_set_A_periph(void __iomem *pio, unsigned mask)
447 writel_relaxed(mask, pio + PIO_ASR);
450 static void at91_mux_set_B_periph(void __iomem *pio, unsigned mask)
452 writel_relaxed(mask, pio + PIO_BSR);
455 static void at91_mux_pio3_set_A_periph(void __iomem *pio, unsigned mask)
458 writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) & ~mask,
460 writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) & ~mask,
464 static void at91_mux_pio3_set_B_periph(void __iomem *pio, unsigned mask)
466 writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) | mask,
468 writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) & ~mask,
472 static void at91_mux_pio3_set_C_periph(void __iomem *pio, unsigned mask)
474 writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) & ~mask, pio + PIO_ABCDSR1);
475 writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) | mask, pio + PIO_ABCDSR2);
478 static void at91_mux_pio3_set_D_periph(void __iomem *pio, unsigned mask)
480 writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) | mask, pio + PIO_ABCDSR1);
481 writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) | mask, pio + PIO_ABCDSR2);
484 static enum at91_mux at91_mux_pio3_get_periph(void __iomem *pio, unsigned mask)
488 if (readl_relaxed(pio + PIO_PSR) & mask)
489 return AT91_MUX_GPIO;
491 select = !!(readl_relaxed(pio + PIO_ABCDSR1) & mask);
492 select |= (!!(readl_relaxed(pio + PIO_ABCDSR2) & mask) << 1);
497 static enum at91_mux at91_mux_get_periph(void __iomem *pio, unsigned mask)
501 if (readl_relaxed(pio + PIO_PSR) & mask)
502 return AT91_MUX_GPIO;
504 select = readl_relaxed(pio + PIO_ABSR) & mask;
509 static bool at91_mux_get_deglitch(void __iomem *pio, unsigned pin)
511 return (readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1;
514 static void at91_mux_set_deglitch(void __iomem *pio, unsigned mask, bool is_on)
516 writel_relaxed(mask, pio + (is_on ? PIO_IFER : PIO_IFDR));
519 static bool at91_mux_pio3_get_deglitch(void __iomem *pio, unsigned pin)
521 if ((readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1)
522 return !((readl_relaxed(pio + PIO_IFSCSR) >> pin) & 0x1);
527 static void at91_mux_pio3_set_deglitch(void __iomem *pio, unsigned mask, bool is_on)
530 writel_relaxed(mask, pio + PIO_IFSCDR);
531 at91_mux_set_deglitch(pio, mask, is_on);
534 static bool at91_mux_pio3_get_debounce(void __iomem *pio, unsigned pin, u32 *div)
536 *div = readl_relaxed(pio + PIO_SCDR);
538 return ((readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1) &&
539 ((readl_relaxed(pio + PIO_IFSCSR) >> pin) & 0x1);
542 static void at91_mux_pio3_set_debounce(void __iomem *pio, unsigned mask,
546 writel_relaxed(mask, pio + PIO_IFSCER);
547 writel_relaxed(div & PIO_SCDR_DIV, pio + PIO_SCDR);
548 writel_relaxed(mask, pio + PIO_IFER);
550 writel_relaxed(mask, pio + PIO_IFSCDR);
553 static bool at91_mux_pio3_get_pulldown(void __iomem *pio, unsigned pin)
555 return !((readl_relaxed(pio + PIO_PPDSR) >> pin) & 0x1);
558 static void at91_mux_pio3_set_pulldown(void __iomem *pio, unsigned mask, bool is_on)
561 writel_relaxed(mask, pio + PIO_PUDR);
563 writel_relaxed(mask, pio + (is_on ? PIO_PPDER : PIO_PPDDR));
566 static void at91_mux_pio3_disable_schmitt_trig(void __iomem *pio, unsigned mask)
568 writel_relaxed(readl_relaxed(pio + PIO_SCHMITT) | mask, pio + PIO_SCHMITT);
571 static bool at91_mux_pio3_get_schmitt_trig(void __iomem *pio, unsigned pin)
573 return (readl_relaxed(pio + PIO_SCHMITT) >> pin) & 0x1;
576 static inline u32 read_drive_strength(void __iomem *reg, unsigned pin)
578 unsigned tmp = readl_relaxed(reg);
580 tmp = tmp >> two_bit_pin_value_shift_amount(pin);
582 return tmp & DRIVE_STRENGTH_MASK;
585 static unsigned at91_mux_sama5d3_get_drivestrength(void __iomem *pio,
588 unsigned tmp = read_drive_strength(pio +
589 sama5d3_get_drive_register(pin), pin);
591 /* SAMA5 strength is 1:1 with our defines,
592 * except 0 is equivalent to low per datasheet */
594 tmp = DRIVE_STRENGTH_BIT_MSK(LOW);
599 static unsigned at91_mux_sam9x5_get_drivestrength(void __iomem *pio,
602 unsigned tmp = read_drive_strength(pio +
603 at91sam9x5_get_drive_register(pin), pin);
605 /* strength is inverse in SAM9x5s hardware with the pinctrl defines
606 * hardware: 0 = hi, 1 = med, 2 = low, 3 = rsvd */
607 tmp = DRIVE_STRENGTH_BIT_MSK(HI) - tmp;
612 static unsigned at91_mux_sam9x60_get_drivestrength(void __iomem *pio,
615 unsigned tmp = readl_relaxed(pio + SAM9X60_PIO_DRIVER1);
618 return DRIVE_STRENGTH_BIT_HI;
620 return DRIVE_STRENGTH_BIT_LOW;
623 static unsigned at91_mux_sam9x60_get_slewrate(void __iomem *pio, unsigned pin)
625 unsigned tmp = readl_relaxed(pio + SAM9X60_PIO_SLEWR);
627 if ((tmp & BIT(pin)))
628 return SLEWRATE_BIT_ENA;
630 return SLEWRATE_BIT_DIS;
633 static void set_drive_strength(void __iomem *reg, unsigned pin, u32 strength)
635 unsigned tmp = readl_relaxed(reg);
636 unsigned shift = two_bit_pin_value_shift_amount(pin);
638 tmp &= ~(DRIVE_STRENGTH_MASK << shift);
639 tmp |= strength << shift;
641 writel_relaxed(tmp, reg);
644 static void at91_mux_sama5d3_set_drivestrength(void __iomem *pio, unsigned pin,
647 /* do nothing if setting is zero */
651 /* strength is 1 to 1 with setting for SAMA5 */
652 set_drive_strength(pio + sama5d3_get_drive_register(pin), pin, setting);
655 static void at91_mux_sam9x5_set_drivestrength(void __iomem *pio, unsigned pin,
658 /* do nothing if setting is zero */
662 /* strength is inverse on SAM9x5s with our defines
663 * 0 = hi, 1 = med, 2 = low, 3 = rsvd */
664 setting = DRIVE_STRENGTH_BIT_MSK(HI) - setting;
666 set_drive_strength(pio + at91sam9x5_get_drive_register(pin), pin,
670 static void at91_mux_sam9x60_set_drivestrength(void __iomem *pio, unsigned pin,
675 if (setting <= DRIVE_STRENGTH_BIT_DEF ||
676 setting == DRIVE_STRENGTH_BIT_MED ||
677 setting > DRIVE_STRENGTH_BIT_HI)
680 tmp = readl_relaxed(pio + SAM9X60_PIO_DRIVER1);
682 /* Strength is 0: low, 1: hi */
683 if (setting == DRIVE_STRENGTH_BIT_LOW)
688 writel_relaxed(tmp, pio + SAM9X60_PIO_DRIVER1);
691 static void at91_mux_sam9x60_set_slewrate(void __iomem *pio, unsigned pin,
696 if (setting < SLEWRATE_BIT_ENA || setting > SLEWRATE_BIT_DIS)
699 tmp = readl_relaxed(pio + SAM9X60_PIO_SLEWR);
701 if (setting == SLEWRATE_BIT_DIS)
706 writel_relaxed(tmp, pio + SAM9X60_PIO_SLEWR);
709 static const struct at91_pinctrl_mux_ops at91rm9200_ops = {
710 .get_periph = at91_mux_get_periph,
711 .mux_A_periph = at91_mux_set_A_periph,
712 .mux_B_periph = at91_mux_set_B_periph,
713 .get_deglitch = at91_mux_get_deglitch,
714 .set_deglitch = at91_mux_set_deglitch,
715 .irq_type = gpio_irq_type,
718 static const struct at91_pinctrl_mux_ops at91sam9x5_ops = {
719 .get_periph = at91_mux_pio3_get_periph,
720 .mux_A_periph = at91_mux_pio3_set_A_periph,
721 .mux_B_periph = at91_mux_pio3_set_B_periph,
722 .mux_C_periph = at91_mux_pio3_set_C_periph,
723 .mux_D_periph = at91_mux_pio3_set_D_periph,
724 .get_deglitch = at91_mux_pio3_get_deglitch,
725 .set_deglitch = at91_mux_pio3_set_deglitch,
726 .get_debounce = at91_mux_pio3_get_debounce,
727 .set_debounce = at91_mux_pio3_set_debounce,
728 .get_pulldown = at91_mux_pio3_get_pulldown,
729 .set_pulldown = at91_mux_pio3_set_pulldown,
730 .get_schmitt_trig = at91_mux_pio3_get_schmitt_trig,
731 .disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig,
732 .get_drivestrength = at91_mux_sam9x5_get_drivestrength,
733 .set_drivestrength = at91_mux_sam9x5_set_drivestrength,
734 .irq_type = alt_gpio_irq_type,
737 static const struct at91_pinctrl_mux_ops sam9x60_ops = {
738 .get_periph = at91_mux_pio3_get_periph,
739 .mux_A_periph = at91_mux_pio3_set_A_periph,
740 .mux_B_periph = at91_mux_pio3_set_B_periph,
741 .mux_C_periph = at91_mux_pio3_set_C_periph,
742 .mux_D_periph = at91_mux_pio3_set_D_periph,
743 .get_deglitch = at91_mux_pio3_get_deglitch,
744 .set_deglitch = at91_mux_pio3_set_deglitch,
745 .get_debounce = at91_mux_pio3_get_debounce,
746 .set_debounce = at91_mux_pio3_set_debounce,
747 .get_pulldown = at91_mux_pio3_get_pulldown,
748 .set_pulldown = at91_mux_pio3_set_pulldown,
749 .get_schmitt_trig = at91_mux_pio3_get_schmitt_trig,
750 .disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig,
751 .get_drivestrength = at91_mux_sam9x60_get_drivestrength,
752 .set_drivestrength = at91_mux_sam9x60_set_drivestrength,
753 .get_slewrate = at91_mux_sam9x60_get_slewrate,
754 .set_slewrate = at91_mux_sam9x60_set_slewrate,
755 .irq_type = alt_gpio_irq_type,
758 static const struct at91_pinctrl_mux_ops sama5d3_ops = {
759 .get_periph = at91_mux_pio3_get_periph,
760 .mux_A_periph = at91_mux_pio3_set_A_periph,
761 .mux_B_periph = at91_mux_pio3_set_B_periph,
762 .mux_C_periph = at91_mux_pio3_set_C_periph,
763 .mux_D_periph = at91_mux_pio3_set_D_periph,
764 .get_deglitch = at91_mux_pio3_get_deglitch,
765 .set_deglitch = at91_mux_pio3_set_deglitch,
766 .get_debounce = at91_mux_pio3_get_debounce,
767 .set_debounce = at91_mux_pio3_set_debounce,
768 .get_pulldown = at91_mux_pio3_get_pulldown,
769 .set_pulldown = at91_mux_pio3_set_pulldown,
770 .get_schmitt_trig = at91_mux_pio3_get_schmitt_trig,
771 .disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig,
772 .get_drivestrength = at91_mux_sama5d3_get_drivestrength,
773 .set_drivestrength = at91_mux_sama5d3_set_drivestrength,
774 .irq_type = alt_gpio_irq_type,
777 static void at91_pin_dbg(const struct device *dev, const struct at91_pmx_pin *pin)
780 dev_dbg(dev, "pio%c%d configured as periph%c with conf = 0x%lx\n",
781 pin->bank + 'A', pin->pin, pin->mux - 1 + 'A', pin->conf);
783 dev_dbg(dev, "pio%c%d configured as gpio with conf = 0x%lx\n",
784 pin->bank + 'A', pin->pin, pin->conf);
788 static int pin_check_config(struct at91_pinctrl *info, const char *name,
789 int index, const struct at91_pmx_pin *pin)
793 /* check if it's a valid config */
794 if (pin->bank >= gpio_banks) {
795 dev_err(info->dev, "%s: pin conf %d bank_id %d >= nbanks %d\n",
796 name, index, pin->bank, gpio_banks);
800 if (!gpio_chips[pin->bank]) {
801 dev_err(info->dev, "%s: pin conf %d bank_id %d not enabled\n",
802 name, index, pin->bank);
806 if (pin->pin >= MAX_NB_GPIO_PER_BANK) {
807 dev_err(info->dev, "%s: pin conf %d pin_bank_id %d >= %d\n",
808 name, index, pin->pin, MAX_NB_GPIO_PER_BANK);
817 if (mux >= info->nmux) {
818 dev_err(info->dev, "%s: pin conf %d mux_id %d >= nmux %d\n",
819 name, index, mux, info->nmux);
823 if (!(info->mux_mask[pin->bank * info->nmux + mux] & 1 << pin->pin)) {
824 dev_err(info->dev, "%s: pin conf %d mux_id %d not supported for pio%c%d\n",
825 name, index, mux, pin->bank + 'A', pin->pin);
832 static void at91_mux_gpio_disable(void __iomem *pio, unsigned mask)
834 writel_relaxed(mask, pio + PIO_PDR);
837 static void at91_mux_gpio_enable(void __iomem *pio, unsigned mask, bool input)
839 writel_relaxed(mask, pio + PIO_PER);
840 writel_relaxed(mask, pio + (input ? PIO_ODR : PIO_OER));
843 static int at91_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
846 struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
847 const struct at91_pmx_pin *pins_conf = info->groups[group].pins_conf;
848 const struct at91_pmx_pin *pin;
849 uint32_t npins = info->groups[group].npins;
854 dev_dbg(info->dev, "enable function %s group %s\n",
855 info->functions[selector].name, info->groups[group].name);
857 /* first check that all the pins of the group are valid with a valid
859 for (i = 0; i < npins; i++) {
861 ret = pin_check_config(info, info->groups[group].name, i, pin);
866 for (i = 0; i < npins; i++) {
868 at91_pin_dbg(info->dev, pin);
869 pio = pin_to_controller(info, pin->bank);
874 mask = pin_to_mask(pin->pin);
875 at91_mux_disable_interrupt(pio, mask);
878 at91_mux_gpio_enable(pio, mask, 1);
880 case AT91_MUX_PERIPH_A:
881 info->ops->mux_A_periph(pio, mask);
883 case AT91_MUX_PERIPH_B:
884 info->ops->mux_B_periph(pio, mask);
886 case AT91_MUX_PERIPH_C:
887 if (!info->ops->mux_C_periph)
889 info->ops->mux_C_periph(pio, mask);
891 case AT91_MUX_PERIPH_D:
892 if (!info->ops->mux_D_periph)
894 info->ops->mux_D_periph(pio, mask);
898 at91_mux_gpio_disable(pio, mask);
904 static int at91_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
906 struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
908 return info->nfunctions;
911 static const char *at91_pmx_get_func_name(struct pinctrl_dev *pctldev,
914 struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
916 return info->functions[selector].name;
919 static int at91_pmx_get_groups(struct pinctrl_dev *pctldev, unsigned selector,
920 const char * const **groups,
921 unsigned * const num_groups)
923 struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
925 *groups = info->functions[selector].groups;
926 *num_groups = info->functions[selector].ngroups;
931 static int at91_gpio_request_enable(struct pinctrl_dev *pctldev,
932 struct pinctrl_gpio_range *range,
935 struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
936 struct at91_gpio_chip *at91_chip;
937 struct gpio_chip *chip;
941 dev_err(npct->dev, "invalid range\n");
945 dev_err(npct->dev, "missing GPIO chip in range\n");
949 at91_chip = gpiochip_get_data(chip);
951 dev_dbg(npct->dev, "enable pin %u as GPIO\n", offset);
953 mask = 1 << (offset - chip->base);
955 dev_dbg(npct->dev, "enable pin %u as PIO%c%d 0x%x\n",
956 offset, 'A' + range->id, offset - chip->base, mask);
958 writel_relaxed(mask, at91_chip->regbase + PIO_PER);
963 static void at91_gpio_disable_free(struct pinctrl_dev *pctldev,
964 struct pinctrl_gpio_range *range,
967 struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
969 dev_dbg(npct->dev, "disable pin %u as GPIO\n", offset);
970 /* Set the pin to some default state, GPIO is usually default */
973 static const struct pinmux_ops at91_pmx_ops = {
974 .get_functions_count = at91_pmx_get_funcs_count,
975 .get_function_name = at91_pmx_get_func_name,
976 .get_function_groups = at91_pmx_get_groups,
977 .set_mux = at91_pmx_set,
978 .gpio_request_enable = at91_gpio_request_enable,
979 .gpio_disable_free = at91_gpio_disable_free,
982 static int at91_pinconf_get(struct pinctrl_dev *pctldev,
983 unsigned pin_id, unsigned long *config)
985 struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
992 dev_dbg(info->dev, "%s:%d, pin_id=%d", __func__, __LINE__, pin_id);
993 pio = pin_to_controller(info, pin_to_bank(pin_id));
998 pin = pin_id % MAX_NB_GPIO_PER_BANK;
1000 if (at91_mux_get_multidrive(pio, pin))
1001 *config |= MULTI_DRIVE;
1003 if (at91_mux_get_pullup(pio, pin))
1006 if (info->ops->get_deglitch && info->ops->get_deglitch(pio, pin))
1007 *config |= DEGLITCH;
1008 if (info->ops->get_debounce && info->ops->get_debounce(pio, pin, &div))
1009 *config |= DEBOUNCE | (div << DEBOUNCE_VAL_SHIFT);
1010 if (info->ops->get_pulldown && info->ops->get_pulldown(pio, pin))
1011 *config |= PULL_DOWN;
1012 if (info->ops->get_schmitt_trig && info->ops->get_schmitt_trig(pio, pin))
1013 *config |= DIS_SCHMIT;
1014 if (info->ops->get_drivestrength)
1015 *config |= (info->ops->get_drivestrength(pio, pin)
1016 << DRIVE_STRENGTH_SHIFT);
1017 if (info->ops->get_slewrate)
1018 *config |= (info->ops->get_slewrate(pio, pin) << SLEWRATE_SHIFT);
1019 if (at91_mux_get_output(pio, pin, &out))
1020 *config |= OUTPUT | (out << OUTPUT_VAL_SHIFT);
1025 static int at91_pinconf_set(struct pinctrl_dev *pctldev,
1026 unsigned pin_id, unsigned long *configs,
1027 unsigned num_configs)
1029 struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
1033 unsigned long config;
1036 for (i = 0; i < num_configs; i++) {
1037 config = configs[i];
1040 "%s:%d, pin_id=%d, config=0x%lx",
1041 __func__, __LINE__, pin_id, config);
1042 pio = pin_to_controller(info, pin_to_bank(pin_id));
1047 pin = pin_id % MAX_NB_GPIO_PER_BANK;
1048 mask = pin_to_mask(pin);
1050 if (config & PULL_UP && config & PULL_DOWN)
1053 at91_mux_set_output(pio, mask, config & OUTPUT,
1054 (config & OUTPUT_VAL) >> OUTPUT_VAL_SHIFT);
1055 at91_mux_set_pullup(pio, mask, config & PULL_UP);
1056 at91_mux_set_multidrive(pio, mask, config & MULTI_DRIVE);
1057 if (info->ops->set_deglitch)
1058 info->ops->set_deglitch(pio, mask, config & DEGLITCH);
1059 if (info->ops->set_debounce)
1060 info->ops->set_debounce(pio, mask, config & DEBOUNCE,
1061 (config & DEBOUNCE_VAL) >> DEBOUNCE_VAL_SHIFT);
1062 if (info->ops->set_pulldown)
1063 info->ops->set_pulldown(pio, mask, config & PULL_DOWN);
1064 if (info->ops->disable_schmitt_trig && config & DIS_SCHMIT)
1065 info->ops->disable_schmitt_trig(pio, mask);
1066 if (info->ops->set_drivestrength)
1067 info->ops->set_drivestrength(pio, pin,
1068 (config & DRIVE_STRENGTH)
1069 >> DRIVE_STRENGTH_SHIFT);
1070 if (info->ops->set_slewrate)
1071 info->ops->set_slewrate(pio, pin,
1072 (config & SLEWRATE) >> SLEWRATE_SHIFT);
1074 } /* for each config */
1079 #define DBG_SHOW_FLAG(flag) do { \
1080 if (config & flag) { \
1083 seq_puts(s, #flag); \
1088 #define DBG_SHOW_FLAG_MASKED(mask, flag, name) do { \
1089 if ((config & mask) == flag) { \
1092 seq_puts(s, #name); \
1097 static void at91_pinconf_dbg_show(struct pinctrl_dev *pctldev,
1098 struct seq_file *s, unsigned pin_id)
1100 unsigned long config;
1101 int val, num_conf = 0;
1103 at91_pinconf_get(pctldev, pin_id, &config);
1105 DBG_SHOW_FLAG(MULTI_DRIVE);
1106 DBG_SHOW_FLAG(PULL_UP);
1107 DBG_SHOW_FLAG(PULL_DOWN);
1108 DBG_SHOW_FLAG(DIS_SCHMIT);
1109 DBG_SHOW_FLAG(DEGLITCH);
1110 DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(LOW),
1111 DRIVE_STRENGTH_LOW);
1112 DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(MED),
1113 DRIVE_STRENGTH_MED);
1114 DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(HI),
1116 DBG_SHOW_FLAG(SLEWRATE);
1117 DBG_SHOW_FLAG(DEBOUNCE);
1118 if (config & DEBOUNCE) {
1119 val = config >> DEBOUNCE_VAL_SHIFT;
1120 seq_printf(s, "(%d)", val);
1126 static void at91_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
1127 struct seq_file *s, unsigned group)
1131 static const struct pinconf_ops at91_pinconf_ops = {
1132 .pin_config_get = at91_pinconf_get,
1133 .pin_config_set = at91_pinconf_set,
1134 .pin_config_dbg_show = at91_pinconf_dbg_show,
1135 .pin_config_group_dbg_show = at91_pinconf_group_dbg_show,
1138 static struct pinctrl_desc at91_pinctrl_desc = {
1139 .pctlops = &at91_pctrl_ops,
1140 .pmxops = &at91_pmx_ops,
1141 .confops = &at91_pinconf_ops,
1142 .owner = THIS_MODULE,
1145 static const char *gpio_compat = "atmel,at91rm9200-gpio";
1147 static void at91_pinctrl_child_count(struct at91_pinctrl *info,
1148 struct device_node *np)
1150 struct device_node *child;
1152 for_each_child_of_node(np, child) {
1153 if (of_device_is_compatible(child, gpio_compat)) {
1154 if (of_device_is_available(child))
1155 info->nactive_banks++;
1158 info->ngroups += of_get_child_count(child);
1163 static int at91_pinctrl_mux_mask(struct at91_pinctrl *info,
1164 struct device_node *np)
1170 list = of_get_property(np, "atmel,mux-mask", &size);
1172 dev_err(info->dev, "can not read the mux-mask of %d\n", size);
1176 size /= sizeof(*list);
1177 if (!size || size % gpio_banks) {
1178 dev_err(info->dev, "wrong mux mask array should be by %d\n", gpio_banks);
1181 info->nmux = size / gpio_banks;
1183 info->mux_mask = devm_kcalloc(info->dev, size, sizeof(u32),
1185 if (!info->mux_mask)
1188 ret = of_property_read_u32_array(np, "atmel,mux-mask",
1189 info->mux_mask, size);
1191 dev_err(info->dev, "can not read the mux-mask of %d\n", size);
1195 static int at91_pinctrl_parse_groups(struct device_node *np,
1196 struct at91_pin_group *grp,
1197 struct at91_pinctrl *info, u32 index)
1199 struct at91_pmx_pin *pin;
1204 dev_dbg(info->dev, "group(%d): %pOFn\n", index, np);
1206 /* Initialise group */
1207 grp->name = np->name;
1210 * the binding format is atmel,pins = <bank pin mux CONFIG ...>,
1211 * do sanity check and calculate pins number
1213 list = of_get_property(np, "atmel,pins", &size);
1214 /* we do not check return since it's safe node passed down */
1215 size /= sizeof(*list);
1216 if (!size || size % 4) {
1217 dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
1221 grp->npins = size / 4;
1222 pin = grp->pins_conf = devm_kcalloc(info->dev,
1224 sizeof(struct at91_pmx_pin),
1226 grp->pins = devm_kcalloc(info->dev, grp->npins, sizeof(unsigned int),
1228 if (!grp->pins_conf || !grp->pins)
1231 for (i = 0, j = 0; i < size; i += 4, j++) {
1232 pin->bank = be32_to_cpu(*list++);
1233 pin->pin = be32_to_cpu(*list++);
1234 grp->pins[j] = pin->bank * MAX_NB_GPIO_PER_BANK + pin->pin;
1235 pin->mux = be32_to_cpu(*list++);
1236 pin->conf = be32_to_cpu(*list++);
1238 at91_pin_dbg(info->dev, pin);
1245 static int at91_pinctrl_parse_functions(struct device_node *np,
1246 struct at91_pinctrl *info, u32 index)
1248 struct device_node *child;
1249 struct at91_pmx_func *func;
1250 struct at91_pin_group *grp;
1252 static u32 grp_index;
1255 dev_dbg(info->dev, "parse function(%d): %pOFn\n", index, np);
1257 func = &info->functions[index];
1259 /* Initialise function */
1260 func->name = np->name;
1261 func->ngroups = of_get_child_count(np);
1262 if (func->ngroups == 0) {
1263 dev_err(info->dev, "no groups defined\n");
1266 func->groups = devm_kcalloc(info->dev,
1267 func->ngroups, sizeof(char *), GFP_KERNEL);
1271 for_each_child_of_node(np, child) {
1272 func->groups[i] = child->name;
1273 grp = &info->groups[grp_index++];
1274 ret = at91_pinctrl_parse_groups(child, grp, info, i++);
1284 static const struct of_device_id at91_pinctrl_of_match[] = {
1285 { .compatible = "atmel,sama5d3-pinctrl", .data = &sama5d3_ops },
1286 { .compatible = "atmel,at91sam9x5-pinctrl", .data = &at91sam9x5_ops },
1287 { .compatible = "atmel,at91rm9200-pinctrl", .data = &at91rm9200_ops },
1288 { .compatible = "microchip,sam9x60-pinctrl", .data = &sam9x60_ops },
1292 static int at91_pinctrl_probe_dt(struct platform_device *pdev,
1293 struct at91_pinctrl *info)
1295 struct device *dev = &pdev->dev;
1297 int i, j, ngpio_chips_enabled = 0;
1299 struct device_node *np = dev->of_node;
1300 struct device_node *child;
1306 info->ops = of_device_get_match_data(dev);
1307 at91_pinctrl_child_count(info, np);
1310 * We need all the GPIO drivers to probe FIRST, or we will not be able
1311 * to obtain references to the struct gpio_chip * for them, and we
1312 * need this to proceed.
1314 for (i = 0; i < MAX_GPIO_BANKS; i++)
1316 ngpio_chips_enabled++;
1318 if (ngpio_chips_enabled < info->nactive_banks)
1319 return -EPROBE_DEFER;
1321 ret = at91_pinctrl_mux_mask(info, np);
1325 dev_dbg(dev, "nmux = %d\n", info->nmux);
1327 dev_dbg(dev, "mux-mask\n");
1328 tmp = info->mux_mask;
1329 for (i = 0; i < gpio_banks; i++) {
1330 for (j = 0; j < info->nmux; j++, tmp++) {
1331 dev_dbg(dev, "%d:%d\t0x%x\n", i, j, tmp[0]);
1335 dev_dbg(dev, "nfunctions = %d\n", info->nfunctions);
1336 dev_dbg(dev, "ngroups = %d\n", info->ngroups);
1337 info->functions = devm_kcalloc(dev, info->nfunctions, sizeof(*info->functions),
1339 if (!info->functions)
1342 info->groups = devm_kcalloc(dev, info->ngroups, sizeof(*info->groups),
1347 dev_dbg(dev, "nbanks = %d\n", gpio_banks);
1348 dev_dbg(dev, "nfunctions = %d\n", info->nfunctions);
1349 dev_dbg(dev, "ngroups = %d\n", info->ngroups);
1353 for_each_child_of_node(np, child) {
1354 if (of_device_is_compatible(child, gpio_compat))
1356 ret = at91_pinctrl_parse_functions(child, info, i++);
1359 return dev_err_probe(dev, ret, "failed to parse function\n");
1366 static int at91_pinctrl_probe(struct platform_device *pdev)
1368 struct device *dev = &pdev->dev;
1369 struct at91_pinctrl *info;
1370 struct pinctrl_pin_desc *pdesc;
1373 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
1377 ret = at91_pinctrl_probe_dt(pdev, info);
1381 at91_pinctrl_desc.name = dev_name(dev);
1382 at91_pinctrl_desc.npins = gpio_banks * MAX_NB_GPIO_PER_BANK;
1383 at91_pinctrl_desc.pins = pdesc =
1384 devm_kcalloc(dev, at91_pinctrl_desc.npins, sizeof(*pdesc), GFP_KERNEL);
1385 if (!at91_pinctrl_desc.pins)
1388 for (i = 0, k = 0; i < gpio_banks; i++) {
1391 names = devm_kasprintf_strarray(dev, "pio", MAX_NB_GPIO_PER_BANK);
1393 return PTR_ERR(names);
1395 for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) {
1396 char *name = names[j];
1398 strreplace(name, '-', i + 'A');
1406 platform_set_drvdata(pdev, info);
1407 info->pctl = devm_pinctrl_register(dev, &at91_pinctrl_desc, info);
1408 if (IS_ERR(info->pctl))
1409 return dev_err_probe(dev, PTR_ERR(info->pctl), "could not register AT91 pinctrl driver\n");
1411 /* We will handle a range of GPIO pins */
1412 for (i = 0; i < gpio_banks; i++)
1414 pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
1416 dev_info(dev, "initialized AT91 pinctrl driver\n");
1421 static int at91_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
1423 struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
1424 void __iomem *pio = at91_gpio->regbase;
1425 unsigned mask = 1 << offset;
1428 osr = readl_relaxed(pio + PIO_OSR);
1430 return GPIO_LINE_DIRECTION_OUT;
1432 return GPIO_LINE_DIRECTION_IN;
1435 static int at91_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
1437 struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
1438 void __iomem *pio = at91_gpio->regbase;
1439 unsigned mask = 1 << offset;
1441 writel_relaxed(mask, pio + PIO_ODR);
1445 static int at91_gpio_get(struct gpio_chip *chip, unsigned offset)
1447 struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
1448 void __iomem *pio = at91_gpio->regbase;
1449 unsigned mask = 1 << offset;
1452 pdsr = readl_relaxed(pio + PIO_PDSR);
1453 return (pdsr & mask) != 0;
1456 static void at91_gpio_set(struct gpio_chip *chip, unsigned offset,
1459 struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
1460 void __iomem *pio = at91_gpio->regbase;
1461 unsigned mask = 1 << offset;
1463 writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR));
1466 static void at91_gpio_set_multiple(struct gpio_chip *chip,
1467 unsigned long *mask, unsigned long *bits)
1469 struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
1470 void __iomem *pio = at91_gpio->regbase;
1472 #define BITS_MASK(bits) (((bits) == 32) ? ~0U : (BIT(bits) - 1))
1473 /* Mask additionally to ngpio as not all GPIO controllers have 32 pins */
1474 uint32_t set_mask = (*mask & *bits) & BITS_MASK(chip->ngpio);
1475 uint32_t clear_mask = (*mask & ~(*bits)) & BITS_MASK(chip->ngpio);
1477 writel_relaxed(set_mask, pio + PIO_SODR);
1478 writel_relaxed(clear_mask, pio + PIO_CODR);
1481 static int at91_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
1484 struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
1485 void __iomem *pio = at91_gpio->regbase;
1486 unsigned mask = 1 << offset;
1488 writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR));
1489 writel_relaxed(mask, pio + PIO_OER);
1494 #ifdef CONFIG_DEBUG_FS
1495 static void at91_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
1499 struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
1500 void __iomem *pio = at91_gpio->regbase;
1501 const char *gpio_label;
1503 for_each_requested_gpio(chip, i, gpio_label) {
1504 unsigned mask = pin_to_mask(i);
1506 mode = at91_gpio->ops->get_periph(pio, mask);
1507 seq_printf(s, "[%s] GPIO%s%d: ",
1508 gpio_label, chip->label, i);
1509 if (mode == AT91_MUX_GPIO) {
1510 seq_printf(s, "[gpio] ");
1511 seq_printf(s, "%s ",
1512 readl_relaxed(pio + PIO_OSR) & mask ?
1513 "output" : "input");
1514 seq_printf(s, "%s\n",
1515 readl_relaxed(pio + PIO_PDSR) & mask ?
1518 seq_printf(s, "[periph %c]\n",
1524 #define at91_gpio_dbg_show NULL
1527 static int gpio_irq_request_resources(struct irq_data *d)
1529 struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
1531 return gpiochip_lock_as_irq(&at91_gpio->chip, irqd_to_hwirq(d));
1534 static void gpio_irq_release_resources(struct irq_data *d)
1536 struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
1538 gpiochip_unlock_as_irq(&at91_gpio->chip, irqd_to_hwirq(d));
1541 /* Several AIC controller irqs are dispatched through this GPIO handler.
1542 * To use any AT91_PIN_* as an externally triggered IRQ, first call
1543 * at91_set_gpio_input() then maybe enable its glitch filter.
1544 * Then just request_irq() with the pin ID; it works like any ARM IRQ
1546 * First implementation always triggers on rising and falling edges
1547 * whereas the newer PIO3 can be additionally configured to trigger on
1548 * level, edge with any polarity.
1550 * Alternatively, certain pins may be used directly as IRQ0..IRQ6 after
1551 * configuring them with at91_set_a_periph() or at91_set_b_periph().
1552 * IRQ0..IRQ6 should be configurable, e.g. level vs edge triggering.
1555 static void gpio_irq_mask(struct irq_data *d)
1557 struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
1558 void __iomem *pio = at91_gpio->regbase;
1559 unsigned mask = 1 << d->hwirq;
1560 unsigned gpio = irqd_to_hwirq(d);
1562 gpiochip_disable_irq(&at91_gpio->chip, gpio);
1565 writel_relaxed(mask, pio + PIO_IDR);
1568 static void gpio_irq_unmask(struct irq_data *d)
1570 struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
1571 void __iomem *pio = at91_gpio->regbase;
1572 unsigned mask = 1 << d->hwirq;
1573 unsigned gpio = irqd_to_hwirq(d);
1575 gpiochip_enable_irq(&at91_gpio->chip, gpio);
1578 writel_relaxed(mask, pio + PIO_IER);
1581 static int gpio_irq_type(struct irq_data *d, unsigned type)
1585 case IRQ_TYPE_EDGE_BOTH:
1592 /* Alternate irq type for PIO3 support */
1593 static int alt_gpio_irq_type(struct irq_data *d, unsigned type)
1595 struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
1596 void __iomem *pio = at91_gpio->regbase;
1597 unsigned mask = 1 << d->hwirq;
1600 case IRQ_TYPE_EDGE_RISING:
1601 irq_set_handler_locked(d, handle_simple_irq);
1602 writel_relaxed(mask, pio + PIO_ESR);
1603 writel_relaxed(mask, pio + PIO_REHLSR);
1605 case IRQ_TYPE_EDGE_FALLING:
1606 irq_set_handler_locked(d, handle_simple_irq);
1607 writel_relaxed(mask, pio + PIO_ESR);
1608 writel_relaxed(mask, pio + PIO_FELLSR);
1610 case IRQ_TYPE_LEVEL_LOW:
1611 irq_set_handler_locked(d, handle_level_irq);
1612 writel_relaxed(mask, pio + PIO_LSR);
1613 writel_relaxed(mask, pio + PIO_FELLSR);
1615 case IRQ_TYPE_LEVEL_HIGH:
1616 irq_set_handler_locked(d, handle_level_irq);
1617 writel_relaxed(mask, pio + PIO_LSR);
1618 writel_relaxed(mask, pio + PIO_REHLSR);
1620 case IRQ_TYPE_EDGE_BOTH:
1622 * disable additional interrupt modes:
1623 * fall back to default behavior
1625 irq_set_handler_locked(d, handle_simple_irq);
1626 writel_relaxed(mask, pio + PIO_AIMDR);
1630 pr_warn("AT91: No type for GPIO irq offset %d\n", d->irq);
1634 /* enable additional interrupt modes */
1635 writel_relaxed(mask, pio + PIO_AIMER);
1640 static void gpio_irq_ack(struct irq_data *d)
1642 /* the interrupt is already cleared before by reading ISR */
1645 static int gpio_irq_set_wake(struct irq_data *d, unsigned state)
1647 struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
1648 unsigned mask = 1 << d->hwirq;
1651 at91_gpio->wakeups |= mask;
1653 at91_gpio->wakeups &= ~mask;
1655 irq_set_irq_wake(at91_gpio->pioc_virq, state);
1660 static int at91_gpio_suspend(struct device *dev)
1662 struct at91_gpio_chip *at91_chip = dev_get_drvdata(dev);
1663 void __iomem *pio = at91_chip->regbase;
1665 at91_chip->backups = readl_relaxed(pio + PIO_IMR);
1666 writel_relaxed(at91_chip->backups, pio + PIO_IDR);
1667 writel_relaxed(at91_chip->wakeups, pio + PIO_IER);
1669 if (!at91_chip->wakeups)
1670 clk_disable_unprepare(at91_chip->clock);
1672 dev_dbg(dev, "GPIO-%c may wake for %08x\n",
1673 'A' + at91_chip->id, at91_chip->wakeups);
1678 static int at91_gpio_resume(struct device *dev)
1680 struct at91_gpio_chip *at91_chip = dev_get_drvdata(dev);
1681 void __iomem *pio = at91_chip->regbase;
1683 if (!at91_chip->wakeups)
1684 clk_prepare_enable(at91_chip->clock);
1686 writel_relaxed(at91_chip->wakeups, pio + PIO_IDR);
1687 writel_relaxed(at91_chip->backups, pio + PIO_IER);
1692 static void gpio_irq_handler(struct irq_desc *desc)
1694 struct irq_chip *chip = irq_desc_get_chip(desc);
1695 struct gpio_chip *gpio_chip = irq_desc_get_handler_data(desc);
1696 struct at91_gpio_chip *at91_gpio = gpiochip_get_data(gpio_chip);
1697 void __iomem *pio = at91_gpio->regbase;
1701 chained_irq_enter(chip, desc);
1703 /* Reading ISR acks pending (edge triggered) GPIO interrupts.
1704 * When there are none pending, we're finished unless we need
1705 * to process multiple banks (like ID_PIOCDE on sam9263).
1707 isr = readl_relaxed(pio + PIO_ISR) & readl_relaxed(pio + PIO_IMR);
1709 if (!at91_gpio->next)
1711 at91_gpio = at91_gpio->next;
1712 pio = at91_gpio->regbase;
1713 gpio_chip = &at91_gpio->chip;
1717 for_each_set_bit(n, &isr, BITS_PER_LONG)
1718 generic_handle_domain_irq(gpio_chip->irq.domain, n);
1720 chained_irq_exit(chip, desc);
1721 /* now it may re-trigger */
1724 static int at91_gpio_of_irq_setup(struct platform_device *pdev,
1725 struct at91_gpio_chip *at91_gpio)
1727 struct device *dev = &pdev->dev;
1728 struct gpio_chip *gpiochip_prev = NULL;
1729 struct at91_gpio_chip *prev = NULL;
1730 struct irq_data *d = irq_get_irq_data(at91_gpio->pioc_virq);
1731 struct irq_chip *gpio_irqchip;
1732 struct gpio_irq_chip *girq;
1735 gpio_irqchip = devm_kzalloc(dev, sizeof(*gpio_irqchip), GFP_KERNEL);
1739 at91_gpio->pioc_hwirq = irqd_to_hwirq(d);
1741 gpio_irqchip->name = "GPIO";
1742 gpio_irqchip->irq_request_resources = gpio_irq_request_resources;
1743 gpio_irqchip->irq_release_resources = gpio_irq_release_resources;
1744 gpio_irqchip->irq_ack = gpio_irq_ack;
1745 gpio_irqchip->irq_disable = gpio_irq_mask;
1746 gpio_irqchip->irq_mask = gpio_irq_mask;
1747 gpio_irqchip->irq_unmask = gpio_irq_unmask;
1748 gpio_irqchip->irq_set_wake = pm_ptr(gpio_irq_set_wake);
1749 gpio_irqchip->irq_set_type = at91_gpio->ops->irq_type;
1750 gpio_irqchip->flags = IRQCHIP_IMMUTABLE;
1752 /* Disable irqs of this PIO controller */
1753 writel_relaxed(~0, at91_gpio->regbase + PIO_IDR);
1756 * Let the generic code handle this edge IRQ, the chained
1757 * handler will perform the actual work of handling the parent
1760 girq = &at91_gpio->chip.irq;
1761 gpio_irq_chip_set_chip(girq, gpio_irqchip);
1762 girq->default_type = IRQ_TYPE_NONE;
1763 girq->handler = handle_edge_irq;
1766 * The top level handler handles one bank of GPIOs, except
1767 * on some SoC it can handle up to three...
1768 * We only set up the handler for the first of the list.
1770 gpiochip_prev = irq_get_handler_data(at91_gpio->pioc_virq);
1771 if (!gpiochip_prev) {
1772 girq->parent_handler = gpio_irq_handler;
1773 girq->num_parents = 1;
1774 girq->parents = devm_kcalloc(dev, girq->num_parents,
1775 sizeof(*girq->parents),
1779 girq->parents[0] = at91_gpio->pioc_virq;
1783 prev = gpiochip_get_data(gpiochip_prev);
1784 /* we can only have 2 banks before */
1785 for (i = 0; i < 2; i++) {
1789 prev->next = at91_gpio;
1797 /* This structure is replicated for each GPIO block allocated at probe time */
1798 static const struct gpio_chip at91_gpio_template = {
1799 .request = gpiochip_generic_request,
1800 .free = gpiochip_generic_free,
1801 .get_direction = at91_gpio_get_direction,
1802 .direction_input = at91_gpio_direction_input,
1803 .get = at91_gpio_get,
1804 .direction_output = at91_gpio_direction_output,
1805 .set = at91_gpio_set,
1806 .set_multiple = at91_gpio_set_multiple,
1807 .dbg_show = at91_gpio_dbg_show,
1809 .ngpio = MAX_NB_GPIO_PER_BANK,
1812 static const struct of_device_id at91_gpio_of_match[] = {
1813 { .compatible = "atmel,at91sam9x5-gpio", .data = &at91sam9x5_ops, },
1814 { .compatible = "atmel,at91rm9200-gpio", .data = &at91rm9200_ops },
1815 { .compatible = "microchip,sam9x60-gpio", .data = &sam9x60_ops },
1819 static int at91_gpio_probe(struct platform_device *pdev)
1821 struct device *dev = &pdev->dev;
1822 struct device_node *np = dev->of_node;
1823 struct at91_gpio_chip *at91_chip = NULL;
1824 struct gpio_chip *chip;
1825 struct pinctrl_gpio_range *range;
1828 int alias_idx = of_alias_get_id(np, "gpio");
1832 BUG_ON(alias_idx >= ARRAY_SIZE(gpio_chips));
1833 if (gpio_chips[alias_idx])
1834 return dev_err_probe(dev, -EBUSY, "%d slot is occupied.\n", alias_idx);
1836 irq = platform_get_irq(pdev, 0);
1840 at91_chip = devm_kzalloc(dev, sizeof(*at91_chip), GFP_KERNEL);
1844 at91_chip->regbase = devm_platform_ioremap_resource(pdev, 0);
1845 if (IS_ERR(at91_chip->regbase))
1846 return PTR_ERR(at91_chip->regbase);
1848 at91_chip->ops = of_device_get_match_data(dev);
1849 at91_chip->pioc_virq = irq;
1851 at91_chip->clock = devm_clk_get_enabled(dev, NULL);
1852 if (IS_ERR(at91_chip->clock))
1853 return dev_err_probe(dev, PTR_ERR(at91_chip->clock), "failed to get clock, ignoring.\n");
1855 at91_chip->chip = at91_gpio_template;
1856 at91_chip->id = alias_idx;
1858 chip = &at91_chip->chip;
1859 chip->label = dev_name(dev);
1861 chip->owner = THIS_MODULE;
1862 chip->base = alias_idx * MAX_NB_GPIO_PER_BANK;
1864 if (!of_property_read_u32(np, "#gpio-lines", &ngpio)) {
1865 if (ngpio >= MAX_NB_GPIO_PER_BANK)
1866 dev_err(dev, "at91_gpio.%d, gpio-nb >= %d failback to %d\n",
1867 alias_idx, MAX_NB_GPIO_PER_BANK, MAX_NB_GPIO_PER_BANK);
1869 chip->ngpio = ngpio;
1872 names = devm_kasprintf_strarray(dev, "pio", chip->ngpio);
1874 return PTR_ERR(names);
1876 for (i = 0; i < chip->ngpio; i++)
1877 strreplace(names[i], '-', alias_idx + 'A');
1879 chip->names = (const char *const *)names;
1881 range = &at91_chip->range;
1882 range->name = chip->label;
1883 range->id = alias_idx;
1884 range->pin_base = range->base = range->id * MAX_NB_GPIO_PER_BANK;
1886 range->npins = chip->ngpio;
1889 ret = at91_gpio_of_irq_setup(pdev, at91_chip);
1893 ret = gpiochip_add_data(chip, at91_chip);
1897 gpio_chips[alias_idx] = at91_chip;
1898 platform_set_drvdata(pdev, at91_chip);
1899 gpio_banks = max(gpio_banks, alias_idx + 1);
1901 dev_info(dev, "at address %p\n", at91_chip->regbase);
1906 static DEFINE_NOIRQ_DEV_PM_OPS(at91_gpio_pm_ops, at91_gpio_suspend, at91_gpio_resume);
1908 static struct platform_driver at91_gpio_driver = {
1910 .name = "gpio-at91",
1911 .of_match_table = at91_gpio_of_match,
1912 .pm = pm_sleep_ptr(&at91_gpio_pm_ops),
1914 .probe = at91_gpio_probe,
1917 static struct platform_driver at91_pinctrl_driver = {
1919 .name = "pinctrl-at91",
1920 .of_match_table = at91_pinctrl_of_match,
1922 .probe = at91_pinctrl_probe,
1925 static struct platform_driver * const drivers[] = {
1927 &at91_pinctrl_driver,
1930 static int __init at91_pinctrl_init(void)
1932 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1934 arch_initcall(at91_pinctrl_init);