2 * pin-controller/pin-mux/pin-config/gpio-driver for Samsung's SoC's.
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com
6 * Copyright (c) 2012 Linaro Ltd
7 * http://www.linaro.org
9 * Author: Thomas Abraham <thomas.ab@samsung.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This driver implements the Samsung pinctrl driver. It supports setting up of
17 * pinmux and pinconf configurations. The gpiolib interface is also included.
18 * External interrupt (gpio and wakeup) support are not included in this driver
19 * but provides extensions to which platform specific implementation of the gpio
20 * and wakeup interrupts can be hooked to.
23 #include <linux/module.h>
24 #include <linux/platform_device.h>
26 #include <linux/slab.h>
27 #include <linux/err.h>
28 #include <linux/gpio.h>
29 #include <linux/irqdomain.h>
30 #include <linux/of_device.h>
31 #include <linux/spinlock.h>
34 #include "pinctrl-samsung.h"
36 /* maximum number of the memory resources */
37 #define SAMSUNG_PINCTRL_NUM_RESOURCES 2
39 /* list of all possible config options supported */
40 static struct pin_config
{
42 enum pincfg_type param
;
44 { "samsung,pin-pud", PINCFG_TYPE_PUD
},
45 { "samsung,pin-drv", PINCFG_TYPE_DRV
},
46 { "samsung,pin-con-pdn", PINCFG_TYPE_CON_PDN
},
47 { "samsung,pin-pud-pdn", PINCFG_TYPE_PUD_PDN
},
48 { "samsung,pin-val", PINCFG_TYPE_DAT
},
51 static unsigned int pin_base
;
53 static int samsung_get_group_count(struct pinctrl_dev
*pctldev
)
55 struct samsung_pinctrl_drv_data
*pmx
= pinctrl_dev_get_drvdata(pctldev
);
57 return pmx
->nr_groups
;
60 static const char *samsung_get_group_name(struct pinctrl_dev
*pctldev
,
63 struct samsung_pinctrl_drv_data
*pmx
= pinctrl_dev_get_drvdata(pctldev
);
65 return pmx
->pin_groups
[group
].name
;
68 static int samsung_get_group_pins(struct pinctrl_dev
*pctldev
,
70 const unsigned **pins
,
73 struct samsung_pinctrl_drv_data
*pmx
= pinctrl_dev_get_drvdata(pctldev
);
75 *pins
= pmx
->pin_groups
[group
].pins
;
76 *num_pins
= pmx
->pin_groups
[group
].num_pins
;
81 static int reserve_map(struct device
*dev
, struct pinctrl_map
**map
,
82 unsigned *reserved_maps
, unsigned *num_maps
,
85 unsigned old_num
= *reserved_maps
;
86 unsigned new_num
= *num_maps
+ reserve
;
87 struct pinctrl_map
*new_map
;
89 if (old_num
>= new_num
)
92 new_map
= krealloc(*map
, sizeof(*new_map
) * new_num
, GFP_KERNEL
);
96 memset(new_map
+ old_num
, 0, (new_num
- old_num
) * sizeof(*new_map
));
99 *reserved_maps
= new_num
;
104 static int add_map_mux(struct pinctrl_map
**map
, unsigned *reserved_maps
,
105 unsigned *num_maps
, const char *group
,
106 const char *function
)
108 if (WARN_ON(*num_maps
== *reserved_maps
))
111 (*map
)[*num_maps
].type
= PIN_MAP_TYPE_MUX_GROUP
;
112 (*map
)[*num_maps
].data
.mux
.group
= group
;
113 (*map
)[*num_maps
].data
.mux
.function
= function
;
119 static int add_map_configs(struct device
*dev
, struct pinctrl_map
**map
,
120 unsigned *reserved_maps
, unsigned *num_maps
,
121 const char *group
, unsigned long *configs
,
122 unsigned num_configs
)
124 unsigned long *dup_configs
;
126 if (WARN_ON(*num_maps
== *reserved_maps
))
129 dup_configs
= kmemdup(configs
, num_configs
* sizeof(*dup_configs
),
134 (*map
)[*num_maps
].type
= PIN_MAP_TYPE_CONFIGS_GROUP
;
135 (*map
)[*num_maps
].data
.configs
.group_or_pin
= group
;
136 (*map
)[*num_maps
].data
.configs
.configs
= dup_configs
;
137 (*map
)[*num_maps
].data
.configs
.num_configs
= num_configs
;
143 static int add_config(struct device
*dev
, unsigned long **configs
,
144 unsigned *num_configs
, unsigned long config
)
146 unsigned old_num
= *num_configs
;
147 unsigned new_num
= old_num
+ 1;
148 unsigned long *new_configs
;
150 new_configs
= krealloc(*configs
, sizeof(*new_configs
) * new_num
,
155 new_configs
[old_num
] = config
;
157 *configs
= new_configs
;
158 *num_configs
= new_num
;
163 static void samsung_dt_free_map(struct pinctrl_dev
*pctldev
,
164 struct pinctrl_map
*map
,
169 for (i
= 0; i
< num_maps
; i
++)
170 if (map
[i
].type
== PIN_MAP_TYPE_CONFIGS_GROUP
)
171 kfree(map
[i
].data
.configs
.configs
);
176 static int samsung_dt_subnode_to_map(struct samsung_pinctrl_drv_data
*drvdata
,
178 struct device_node
*np
,
179 struct pinctrl_map
**map
,
180 unsigned *reserved_maps
,
185 unsigned long config
;
186 unsigned long *configs
= NULL
;
187 unsigned num_configs
= 0;
189 struct property
*prop
;
191 bool has_func
= false;
193 ret
= of_property_read_u32(np
, "samsung,pin-function", &val
);
197 for (i
= 0; i
< ARRAY_SIZE(cfg_params
); i
++) {
198 ret
= of_property_read_u32(np
, cfg_params
[i
].property
, &val
);
200 config
= PINCFG_PACK(cfg_params
[i
].param
, val
);
201 ret
= add_config(dev
, &configs
, &num_configs
, config
);
204 /* EINVAL=missing, which is fine since it's optional */
205 } else if (ret
!= -EINVAL
) {
206 dev_err(dev
, "could not parse property %s\n",
207 cfg_params
[i
].property
);
216 ret
= of_property_count_strings(np
, "samsung,pins");
218 dev_err(dev
, "could not parse property samsung,pins\n");
223 ret
= reserve_map(dev
, map
, reserved_maps
, num_maps
, reserve
);
227 of_property_for_each_string(np
, "samsung,pins", prop
, group
) {
229 ret
= add_map_mux(map
, reserved_maps
,
230 num_maps
, group
, np
->full_name
);
236 ret
= add_map_configs(dev
, map
, reserved_maps
,
237 num_maps
, group
, configs
,
251 static int samsung_dt_node_to_map(struct pinctrl_dev
*pctldev
,
252 struct device_node
*np_config
,
253 struct pinctrl_map
**map
,
256 struct samsung_pinctrl_drv_data
*drvdata
;
257 unsigned reserved_maps
;
258 struct device_node
*np
;
261 drvdata
= pinctrl_dev_get_drvdata(pctldev
);
267 if (!of_get_child_count(np_config
))
268 return samsung_dt_subnode_to_map(drvdata
, pctldev
->dev
,
273 for_each_child_of_node(np_config
, np
) {
274 ret
= samsung_dt_subnode_to_map(drvdata
, pctldev
->dev
, np
, map
,
275 &reserved_maps
, num_maps
);
277 samsung_dt_free_map(pctldev
, *map
, *num_maps
);
285 /* list of pinctrl callbacks for the pinctrl core */
286 static const struct pinctrl_ops samsung_pctrl_ops
= {
287 .get_groups_count
= samsung_get_group_count
,
288 .get_group_name
= samsung_get_group_name
,
289 .get_group_pins
= samsung_get_group_pins
,
290 .dt_node_to_map
= samsung_dt_node_to_map
,
291 .dt_free_map
= samsung_dt_free_map
,
294 /* check if the selector is a valid pin function selector */
295 static int samsung_get_functions_count(struct pinctrl_dev
*pctldev
)
297 struct samsung_pinctrl_drv_data
*drvdata
;
299 drvdata
= pinctrl_dev_get_drvdata(pctldev
);
300 return drvdata
->nr_functions
;
303 /* return the name of the pin function specified */
304 static const char *samsung_pinmux_get_fname(struct pinctrl_dev
*pctldev
,
307 struct samsung_pinctrl_drv_data
*drvdata
;
309 drvdata
= pinctrl_dev_get_drvdata(pctldev
);
310 return drvdata
->pmx_functions
[selector
].name
;
313 /* return the groups associated for the specified function selector */
314 static int samsung_pinmux_get_groups(struct pinctrl_dev
*pctldev
,
315 unsigned selector
, const char * const **groups
,
316 unsigned * const num_groups
)
318 struct samsung_pinctrl_drv_data
*drvdata
;
320 drvdata
= pinctrl_dev_get_drvdata(pctldev
);
321 *groups
= drvdata
->pmx_functions
[selector
].groups
;
322 *num_groups
= drvdata
->pmx_functions
[selector
].num_groups
;
327 * given a pin number that is local to a pin controller, find out the pin bank
328 * and the register base of the pin bank.
330 static void pin_to_reg_bank(struct samsung_pinctrl_drv_data
*drvdata
,
331 unsigned pin
, void __iomem
**reg
, u32
*offset
,
332 struct samsung_pin_bank
**bank
)
334 struct samsung_pin_bank
*b
;
336 b
= drvdata
->pin_banks
;
338 while ((pin
>= b
->pin_base
) &&
339 ((b
->pin_base
+ b
->nr_pins
- 1) < pin
))
342 *reg
= b
->pctl_base
+ b
->pctl_offset
;
343 *offset
= pin
- b
->pin_base
;
348 /* enable or disable a pinmux function */
349 static void samsung_pinmux_setup(struct pinctrl_dev
*pctldev
, unsigned selector
,
352 struct samsung_pinctrl_drv_data
*drvdata
;
353 const struct samsung_pin_bank_type
*type
;
354 struct samsung_pin_bank
*bank
;
356 u32 mask
, shift
, data
, pin_offset
;
358 const struct samsung_pmx_func
*func
;
359 const struct samsung_pin_group
*grp
;
361 drvdata
= pinctrl_dev_get_drvdata(pctldev
);
362 func
= &drvdata
->pmx_functions
[selector
];
363 grp
= &drvdata
->pin_groups
[group
];
365 pin_to_reg_bank(drvdata
, grp
->pins
[0] - drvdata
->pin_base
,
366 ®
, &pin_offset
, &bank
);
368 mask
= (1 << type
->fld_width
[PINCFG_TYPE_FUNC
]) - 1;
369 shift
= pin_offset
* type
->fld_width
[PINCFG_TYPE_FUNC
];
371 /* Some banks have two config registers */
376 spin_lock_irqsave(&bank
->slock
, flags
);
378 data
= readl(reg
+ type
->reg_offset
[PINCFG_TYPE_FUNC
]);
379 data
&= ~(mask
<< shift
);
380 data
|= func
->val
<< shift
;
381 writel(data
, reg
+ type
->reg_offset
[PINCFG_TYPE_FUNC
]);
383 spin_unlock_irqrestore(&bank
->slock
, flags
);
386 /* enable a specified pinmux by writing to registers */
387 static int samsung_pinmux_set_mux(struct pinctrl_dev
*pctldev
,
391 samsung_pinmux_setup(pctldev
, selector
, group
);
395 /* list of pinmux callbacks for the pinmux vertical in pinctrl core */
396 static const struct pinmux_ops samsung_pinmux_ops
= {
397 .get_functions_count
= samsung_get_functions_count
,
398 .get_function_name
= samsung_pinmux_get_fname
,
399 .get_function_groups
= samsung_pinmux_get_groups
,
400 .set_mux
= samsung_pinmux_set_mux
,
403 /* set or get the pin config settings for a specified pin */
404 static int samsung_pinconf_rw(struct pinctrl_dev
*pctldev
, unsigned int pin
,
405 unsigned long *config
, bool set
)
407 struct samsung_pinctrl_drv_data
*drvdata
;
408 const struct samsung_pin_bank_type
*type
;
409 struct samsung_pin_bank
*bank
;
410 void __iomem
*reg_base
;
411 enum pincfg_type cfg_type
= PINCFG_UNPACK_TYPE(*config
);
412 u32 data
, width
, pin_offset
, mask
, shift
;
413 u32 cfg_value
, cfg_reg
;
416 drvdata
= pinctrl_dev_get_drvdata(pctldev
);
417 pin_to_reg_bank(drvdata
, pin
- drvdata
->pin_base
, ®_base
,
421 if (cfg_type
>= PINCFG_TYPE_NUM
|| !type
->fld_width
[cfg_type
])
424 width
= type
->fld_width
[cfg_type
];
425 cfg_reg
= type
->reg_offset
[cfg_type
];
427 spin_lock_irqsave(&bank
->slock
, flags
);
429 mask
= (1 << width
) - 1;
430 shift
= pin_offset
* width
;
431 data
= readl(reg_base
+ cfg_reg
);
434 cfg_value
= PINCFG_UNPACK_VALUE(*config
);
435 data
&= ~(mask
<< shift
);
436 data
|= (cfg_value
<< shift
);
437 writel(data
, reg_base
+ cfg_reg
);
441 *config
= PINCFG_PACK(cfg_type
, data
);
444 spin_unlock_irqrestore(&bank
->slock
, flags
);
449 /* set the pin config settings for a specified pin */
450 static int samsung_pinconf_set(struct pinctrl_dev
*pctldev
, unsigned int pin
,
451 unsigned long *configs
, unsigned num_configs
)
455 for (i
= 0; i
< num_configs
; i
++) {
456 ret
= samsung_pinconf_rw(pctldev
, pin
, &configs
[i
], true);
459 } /* for each config */
464 /* get the pin config settings for a specified pin */
465 static int samsung_pinconf_get(struct pinctrl_dev
*pctldev
, unsigned int pin
,
466 unsigned long *config
)
468 return samsung_pinconf_rw(pctldev
, pin
, config
, false);
471 /* set the pin config settings for a specified pin group */
472 static int samsung_pinconf_group_set(struct pinctrl_dev
*pctldev
,
473 unsigned group
, unsigned long *configs
,
474 unsigned num_configs
)
476 struct samsung_pinctrl_drv_data
*drvdata
;
477 const unsigned int *pins
;
480 drvdata
= pinctrl_dev_get_drvdata(pctldev
);
481 pins
= drvdata
->pin_groups
[group
].pins
;
483 for (cnt
= 0; cnt
< drvdata
->pin_groups
[group
].num_pins
; cnt
++)
484 samsung_pinconf_set(pctldev
, pins
[cnt
], configs
, num_configs
);
489 /* get the pin config settings for a specified pin group */
490 static int samsung_pinconf_group_get(struct pinctrl_dev
*pctldev
,
491 unsigned int group
, unsigned long *config
)
493 struct samsung_pinctrl_drv_data
*drvdata
;
494 const unsigned int *pins
;
496 drvdata
= pinctrl_dev_get_drvdata(pctldev
);
497 pins
= drvdata
->pin_groups
[group
].pins
;
498 samsung_pinconf_get(pctldev
, pins
[0], config
);
502 /* list of pinconfig callbacks for pinconfig vertical in the pinctrl code */
503 static const struct pinconf_ops samsung_pinconf_ops
= {
504 .pin_config_get
= samsung_pinconf_get
,
505 .pin_config_set
= samsung_pinconf_set
,
506 .pin_config_group_get
= samsung_pinconf_group_get
,
507 .pin_config_group_set
= samsung_pinconf_group_set
,
511 * The samsung_gpio_set_vlaue() should be called with "bank->slock" held
512 * to avoid race condition.
514 static void samsung_gpio_set_value(struct gpio_chip
*gc
,
515 unsigned offset
, int value
)
517 struct samsung_pin_bank
*bank
= gpiochip_get_data(gc
);
518 const struct samsung_pin_bank_type
*type
= bank
->type
;
522 reg
= bank
->pctl_base
+ bank
->pctl_offset
;
524 data
= readl(reg
+ type
->reg_offset
[PINCFG_TYPE_DAT
]);
525 data
&= ~(1 << offset
);
528 writel(data
, reg
+ type
->reg_offset
[PINCFG_TYPE_DAT
]);
531 /* gpiolib gpio_set callback function */
532 static void samsung_gpio_set(struct gpio_chip
*gc
, unsigned offset
, int value
)
534 struct samsung_pin_bank
*bank
= gpiochip_get_data(gc
);
537 spin_lock_irqsave(&bank
->slock
, flags
);
538 samsung_gpio_set_value(gc
, offset
, value
);
539 spin_unlock_irqrestore(&bank
->slock
, flags
);
542 /* gpiolib gpio_get callback function */
543 static int samsung_gpio_get(struct gpio_chip
*gc
, unsigned offset
)
547 struct samsung_pin_bank
*bank
= gpiochip_get_data(gc
);
548 const struct samsung_pin_bank_type
*type
= bank
->type
;
550 reg
= bank
->pctl_base
+ bank
->pctl_offset
;
552 data
= readl(reg
+ type
->reg_offset
[PINCFG_TYPE_DAT
]);
559 * The samsung_gpio_set_direction() should be called with "bank->slock" held
560 * to avoid race condition.
561 * The calls to gpio_direction_output() and gpio_direction_input()
562 * leads to this function call.
564 static int samsung_gpio_set_direction(struct gpio_chip
*gc
,
565 unsigned offset
, bool input
)
567 const struct samsung_pin_bank_type
*type
;
568 struct samsung_pin_bank
*bank
;
569 struct samsung_pinctrl_drv_data
*drvdata
;
571 u32 data
, mask
, shift
;
573 bank
= gpiochip_get_data(gc
);
575 drvdata
= bank
->drvdata
;
577 reg
= bank
->pctl_base
+ bank
->pctl_offset
578 + type
->reg_offset
[PINCFG_TYPE_FUNC
];
580 mask
= (1 << type
->fld_width
[PINCFG_TYPE_FUNC
]) - 1;
581 shift
= offset
* type
->fld_width
[PINCFG_TYPE_FUNC
];
583 /* Some banks have two config registers */
589 data
&= ~(mask
<< shift
);
591 data
|= FUNC_OUTPUT
<< shift
;
597 /* gpiolib gpio_direction_input callback function. */
598 static int samsung_gpio_direction_input(struct gpio_chip
*gc
, unsigned offset
)
600 struct samsung_pin_bank
*bank
= gpiochip_get_data(gc
);
604 spin_lock_irqsave(&bank
->slock
, flags
);
605 ret
= samsung_gpio_set_direction(gc
, offset
, true);
606 spin_unlock_irqrestore(&bank
->slock
, flags
);
610 /* gpiolib gpio_direction_output callback function. */
611 static int samsung_gpio_direction_output(struct gpio_chip
*gc
, unsigned offset
,
614 struct samsung_pin_bank
*bank
= gpiochip_get_data(gc
);
618 spin_lock_irqsave(&bank
->slock
, flags
);
619 samsung_gpio_set_value(gc
, offset
, value
);
620 ret
= samsung_gpio_set_direction(gc
, offset
, false);
621 spin_unlock_irqrestore(&bank
->slock
, flags
);
627 * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
628 * and a virtual IRQ, if not already present.
630 static int samsung_gpio_to_irq(struct gpio_chip
*gc
, unsigned offset
)
632 struct samsung_pin_bank
*bank
= gpiochip_get_data(gc
);
635 if (!bank
->irq_domain
)
638 virq
= irq_create_mapping(bank
->irq_domain
, offset
);
640 return (virq
) ? : -ENXIO
;
643 static struct samsung_pin_group
*samsung_pinctrl_create_groups(
645 struct samsung_pinctrl_drv_data
*drvdata
,
648 struct pinctrl_desc
*ctrldesc
= &drvdata
->pctl
;
649 struct samsung_pin_group
*groups
, *grp
;
650 const struct pinctrl_pin_desc
*pdesc
;
653 groups
= devm_kzalloc(dev
, ctrldesc
->npins
* sizeof(*groups
),
656 return ERR_PTR(-EINVAL
);
659 pdesc
= ctrldesc
->pins
;
660 for (i
= 0; i
< ctrldesc
->npins
; ++i
, ++pdesc
, ++grp
) {
661 grp
->name
= pdesc
->name
;
662 grp
->pins
= &pdesc
->number
;
666 *cnt
= ctrldesc
->npins
;
670 static int samsung_pinctrl_create_function(struct device
*dev
,
671 struct samsung_pinctrl_drv_data
*drvdata
,
672 struct device_node
*func_np
,
673 struct samsung_pmx_func
*func
)
679 if (of_property_read_u32(func_np
, "samsung,pin-function", &func
->val
))
682 npins
= of_property_count_strings(func_np
, "samsung,pins");
684 dev_err(dev
, "invalid pin list in %s node", func_np
->name
);
688 func
->name
= func_np
->full_name
;
690 func
->groups
= devm_kzalloc(dev
, npins
* sizeof(char *), GFP_KERNEL
);
694 for (i
= 0; i
< npins
; ++i
) {
697 ret
= of_property_read_string_index(func_np
, "samsung,pins",
701 "failed to read pin name %d from %s node\n",
706 func
->groups
[i
] = gname
;
709 func
->num_groups
= npins
;
713 static struct samsung_pmx_func
*samsung_pinctrl_create_functions(
715 struct samsung_pinctrl_drv_data
*drvdata
,
718 struct samsung_pmx_func
*functions
, *func
;
719 struct device_node
*dev_np
= dev
->of_node
;
720 struct device_node
*cfg_np
;
721 unsigned int func_cnt
= 0;
725 * Iterate over all the child nodes of the pin controller node
726 * and create pin groups and pin function lists.
728 for_each_child_of_node(dev_np
, cfg_np
) {
729 struct device_node
*func_np
;
731 if (!of_get_child_count(cfg_np
)) {
732 if (!of_find_property(cfg_np
,
733 "samsung,pin-function", NULL
))
739 for_each_child_of_node(cfg_np
, func_np
) {
740 if (!of_find_property(func_np
,
741 "samsung,pin-function", NULL
))
747 functions
= devm_kzalloc(dev
, func_cnt
* sizeof(*functions
),
750 return ERR_PTR(-ENOMEM
);
754 * Iterate over all the child nodes of the pin controller node
755 * and create pin groups and pin function lists.
758 for_each_child_of_node(dev_np
, cfg_np
) {
759 struct device_node
*func_np
;
761 if (!of_get_child_count(cfg_np
)) {
762 ret
= samsung_pinctrl_create_function(dev
, drvdata
,
773 for_each_child_of_node(cfg_np
, func_np
) {
774 ret
= samsung_pinctrl_create_function(dev
, drvdata
,
790 * Parse the information about all the available pin groups and pin functions
791 * from device node of the pin-controller. A pin group is formed with all
792 * the pins listed in the "samsung,pins" property.
795 static int samsung_pinctrl_parse_dt(struct platform_device
*pdev
,
796 struct samsung_pinctrl_drv_data
*drvdata
)
798 struct device
*dev
= &pdev
->dev
;
799 struct samsung_pin_group
*groups
;
800 struct samsung_pmx_func
*functions
;
801 unsigned int grp_cnt
= 0, func_cnt
= 0;
803 groups
= samsung_pinctrl_create_groups(dev
, drvdata
, &grp_cnt
);
804 if (IS_ERR(groups
)) {
805 dev_err(dev
, "failed to parse pin groups\n");
806 return PTR_ERR(groups
);
809 functions
= samsung_pinctrl_create_functions(dev
, drvdata
, &func_cnt
);
810 if (IS_ERR(functions
)) {
811 dev_err(dev
, "failed to parse pin functions\n");
812 return PTR_ERR(functions
);
815 drvdata
->pin_groups
= groups
;
816 drvdata
->nr_groups
= grp_cnt
;
817 drvdata
->pmx_functions
= functions
;
818 drvdata
->nr_functions
= func_cnt
;
823 /* register the pinctrl interface with the pinctrl subsystem */
824 static int samsung_pinctrl_register(struct platform_device
*pdev
,
825 struct samsung_pinctrl_drv_data
*drvdata
)
827 struct pinctrl_desc
*ctrldesc
= &drvdata
->pctl
;
828 struct pinctrl_pin_desc
*pindesc
, *pdesc
;
829 struct samsung_pin_bank
*pin_bank
;
833 ctrldesc
->name
= "samsung-pinctrl";
834 ctrldesc
->owner
= THIS_MODULE
;
835 ctrldesc
->pctlops
= &samsung_pctrl_ops
;
836 ctrldesc
->pmxops
= &samsung_pinmux_ops
;
837 ctrldesc
->confops
= &samsung_pinconf_ops
;
839 pindesc
= devm_kzalloc(&pdev
->dev
, sizeof(*pindesc
) *
840 drvdata
->nr_pins
, GFP_KERNEL
);
843 ctrldesc
->pins
= pindesc
;
844 ctrldesc
->npins
= drvdata
->nr_pins
;
846 /* dynamically populate the pin number and pin name for pindesc */
847 for (pin
= 0, pdesc
= pindesc
; pin
< ctrldesc
->npins
; pin
++, pdesc
++)
848 pdesc
->number
= pin
+ drvdata
->pin_base
;
851 * allocate space for storing the dynamically generated names for all
852 * the pins which belong to this pin-controller.
854 pin_names
= devm_kzalloc(&pdev
->dev
, sizeof(char) * PIN_NAME_LENGTH
*
855 drvdata
->nr_pins
, GFP_KERNEL
);
859 /* for each pin, the name of the pin is pin-bank name + pin number */
860 for (bank
= 0; bank
< drvdata
->nr_banks
; bank
++) {
861 pin_bank
= &drvdata
->pin_banks
[bank
];
862 for (pin
= 0; pin
< pin_bank
->nr_pins
; pin
++) {
863 sprintf(pin_names
, "%s-%d", pin_bank
->name
, pin
);
864 pdesc
= pindesc
+ pin_bank
->pin_base
+ pin
;
865 pdesc
->name
= pin_names
;
866 pin_names
+= PIN_NAME_LENGTH
;
870 ret
= samsung_pinctrl_parse_dt(pdev
, drvdata
);
874 drvdata
->pctl_dev
= devm_pinctrl_register(&pdev
->dev
, ctrldesc
,
876 if (IS_ERR(drvdata
->pctl_dev
)) {
877 dev_err(&pdev
->dev
, "could not register pinctrl driver\n");
878 return PTR_ERR(drvdata
->pctl_dev
);
881 for (bank
= 0; bank
< drvdata
->nr_banks
; ++bank
) {
882 pin_bank
= &drvdata
->pin_banks
[bank
];
883 pin_bank
->grange
.name
= pin_bank
->name
;
884 pin_bank
->grange
.id
= bank
;
885 pin_bank
->grange
.pin_base
= drvdata
->pin_base
886 + pin_bank
->pin_base
;
887 pin_bank
->grange
.base
= pin_bank
->gpio_chip
.base
;
888 pin_bank
->grange
.npins
= pin_bank
->gpio_chip
.ngpio
;
889 pin_bank
->grange
.gc
= &pin_bank
->gpio_chip
;
890 pinctrl_add_gpio_range(drvdata
->pctl_dev
, &pin_bank
->grange
);
896 static const struct gpio_chip samsung_gpiolib_chip
= {
897 .request
= gpiochip_generic_request
,
898 .free
= gpiochip_generic_free
,
899 .set
= samsung_gpio_set
,
900 .get
= samsung_gpio_get
,
901 .direction_input
= samsung_gpio_direction_input
,
902 .direction_output
= samsung_gpio_direction_output
,
903 .to_irq
= samsung_gpio_to_irq
,
904 .owner
= THIS_MODULE
,
907 /* register the gpiolib interface with the gpiolib subsystem */
908 static int samsung_gpiolib_register(struct platform_device
*pdev
,
909 struct samsung_pinctrl_drv_data
*drvdata
)
911 struct samsung_pin_bank
*bank
= drvdata
->pin_banks
;
912 struct gpio_chip
*gc
;
916 for (i
= 0; i
< drvdata
->nr_banks
; ++i
, ++bank
) {
917 bank
->gpio_chip
= samsung_gpiolib_chip
;
919 gc
= &bank
->gpio_chip
;
920 gc
->base
= drvdata
->pin_base
+ bank
->pin_base
;
921 gc
->ngpio
= bank
->nr_pins
;
922 gc
->parent
= &pdev
->dev
;
923 gc
->of_node
= bank
->of_node
;
924 gc
->label
= bank
->name
;
926 ret
= gpiochip_add_data(gc
, bank
);
928 dev_err(&pdev
->dev
, "failed to register gpio_chip %s, error code: %d\n",
937 for (--i
, --bank
; i
>= 0; --i
, --bank
)
938 gpiochip_remove(&bank
->gpio_chip
);
942 /* unregister the gpiolib interface with the gpiolib subsystem */
943 static int samsung_gpiolib_unregister(struct platform_device
*pdev
,
944 struct samsung_pinctrl_drv_data
*drvdata
)
946 struct samsung_pin_bank
*bank
= drvdata
->pin_banks
;
949 for (i
= 0; i
< drvdata
->nr_banks
; ++i
, ++bank
)
950 gpiochip_remove(&bank
->gpio_chip
);
955 /* retrieve the soc specific data */
956 static const struct samsung_pin_ctrl
*
957 samsung_pinctrl_get_soc_data(struct samsung_pinctrl_drv_data
*d
,
958 struct platform_device
*pdev
)
961 struct device_node
*node
= pdev
->dev
.of_node
;
962 struct device_node
*np
;
963 const struct samsung_pin_bank_data
*bdata
;
964 const struct samsung_pin_ctrl
*ctrl
;
965 struct samsung_pin_bank
*bank
;
966 struct resource
*res
;
967 void __iomem
*virt_base
[SAMSUNG_PINCTRL_NUM_RESOURCES
];
970 id
= of_alias_get_id(node
, "pinctrl");
972 dev_err(&pdev
->dev
, "failed to get alias id\n");
973 return ERR_PTR(-ENOENT
);
975 ctrl
= of_device_get_match_data(&pdev
->dev
);
978 d
->suspend
= ctrl
->suspend
;
979 d
->resume
= ctrl
->resume
;
980 d
->nr_banks
= ctrl
->nr_banks
;
981 d
->pin_banks
= devm_kcalloc(&pdev
->dev
, d
->nr_banks
,
982 sizeof(*d
->pin_banks
), GFP_KERNEL
);
984 return ERR_PTR(-ENOMEM
);
986 if (ctrl
->nr_ext_resources
+ 1 > SAMSUNG_PINCTRL_NUM_RESOURCES
)
987 return ERR_PTR(-EINVAL
);
989 for (i
= 0; i
< ctrl
->nr_ext_resources
+ 1; i
++) {
990 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, i
);
992 dev_err(&pdev
->dev
, "failed to get mem%d resource\n", i
);
993 return ERR_PTR(-EINVAL
);
995 virt_base
[i
] = devm_ioremap(&pdev
->dev
, res
->start
,
998 dev_err(&pdev
->dev
, "failed to ioremap %pR\n", res
);
999 return ERR_PTR(-EIO
);
1003 bank
= d
->pin_banks
;
1004 bdata
= ctrl
->pin_banks
;
1005 for (i
= 0; i
< ctrl
->nr_banks
; ++i
, ++bdata
, ++bank
) {
1006 bank
->type
= bdata
->type
;
1007 bank
->pctl_offset
= bdata
->pctl_offset
;
1008 bank
->nr_pins
= bdata
->nr_pins
;
1009 bank
->eint_func
= bdata
->eint_func
;
1010 bank
->eint_type
= bdata
->eint_type
;
1011 bank
->eint_mask
= bdata
->eint_mask
;
1012 bank
->eint_offset
= bdata
->eint_offset
;
1013 bank
->name
= bdata
->name
;
1015 spin_lock_init(&bank
->slock
);
1017 bank
->pin_base
= d
->nr_pins
;
1018 d
->nr_pins
+= bank
->nr_pins
;
1020 bank
->eint_base
= virt_base
[0];
1021 bank
->pctl_base
= virt_base
[bdata
->pctl_res_idx
];
1024 for_each_child_of_node(node
, np
) {
1025 if (!of_find_property(np
, "gpio-controller", NULL
))
1027 bank
= d
->pin_banks
;
1028 for (i
= 0; i
< d
->nr_banks
; ++i
, ++bank
) {
1029 if (!strcmp(bank
->name
, np
->name
)) {
1036 d
->pin_base
= pin_base
;
1037 pin_base
+= d
->nr_pins
;
1042 static int samsung_pinctrl_probe(struct platform_device
*pdev
)
1044 struct samsung_pinctrl_drv_data
*drvdata
;
1045 const struct samsung_pin_ctrl
*ctrl
;
1046 struct device
*dev
= &pdev
->dev
;
1047 struct resource
*res
;
1050 drvdata
= devm_kzalloc(dev
, sizeof(*drvdata
), GFP_KERNEL
);
1054 ctrl
= samsung_pinctrl_get_soc_data(drvdata
, pdev
);
1056 dev_err(&pdev
->dev
, "driver data not available\n");
1057 return PTR_ERR(ctrl
);
1061 res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
1063 drvdata
->irq
= res
->start
;
1065 if (ctrl
->retention_data
) {
1066 drvdata
->retention_ctrl
= ctrl
->retention_data
->init(drvdata
,
1067 ctrl
->retention_data
);
1068 if (IS_ERR(drvdata
->retention_ctrl
))
1069 return PTR_ERR(drvdata
->retention_ctrl
);
1072 ret
= samsung_gpiolib_register(pdev
, drvdata
);
1076 ret
= samsung_pinctrl_register(pdev
, drvdata
);
1078 samsung_gpiolib_unregister(pdev
, drvdata
);
1082 if (ctrl
->eint_gpio_init
)
1083 ctrl
->eint_gpio_init(drvdata
);
1084 if (ctrl
->eint_wkup_init
)
1085 ctrl
->eint_wkup_init(drvdata
);
1087 platform_set_drvdata(pdev
, drvdata
);
1093 * samsung_pinctrl_suspend - save pinctrl state for suspend
1095 * Save data for all banks handled by this device.
1097 static int __maybe_unused
samsung_pinctrl_suspend(struct device
*dev
)
1099 struct samsung_pinctrl_drv_data
*drvdata
= dev_get_drvdata(dev
);
1102 for (i
= 0; i
< drvdata
->nr_banks
; i
++) {
1103 struct samsung_pin_bank
*bank
= &drvdata
->pin_banks
[i
];
1104 void __iomem
*reg
= bank
->pctl_base
+ bank
->pctl_offset
;
1105 const u8
*offs
= bank
->type
->reg_offset
;
1106 const u8
*widths
= bank
->type
->fld_width
;
1107 enum pincfg_type type
;
1109 /* Registers without a powerdown config aren't lost */
1110 if (!widths
[PINCFG_TYPE_CON_PDN
])
1113 for (type
= 0; type
< PINCFG_TYPE_NUM
; type
++)
1115 bank
->pm_save
[type
] = readl(reg
+ offs
[type
]);
1117 if (widths
[PINCFG_TYPE_FUNC
] * bank
->nr_pins
> 32) {
1118 /* Some banks have two config registers */
1119 bank
->pm_save
[PINCFG_TYPE_NUM
] =
1120 readl(reg
+ offs
[PINCFG_TYPE_FUNC
] + 4);
1121 pr_debug("Save %s @ %p (con %#010x %08x)\n",
1123 bank
->pm_save
[PINCFG_TYPE_FUNC
],
1124 bank
->pm_save
[PINCFG_TYPE_NUM
]);
1126 pr_debug("Save %s @ %p (con %#010x)\n", bank
->name
,
1127 reg
, bank
->pm_save
[PINCFG_TYPE_FUNC
]);
1131 if (drvdata
->suspend
)
1132 drvdata
->suspend(drvdata
);
1133 if (drvdata
->retention_ctrl
&& drvdata
->retention_ctrl
->enable
)
1134 drvdata
->retention_ctrl
->enable(drvdata
);
1140 * samsung_pinctrl_resume - restore pinctrl state from suspend
1142 * Restore one of the banks that was saved during suspend.
1144 * We don't bother doing anything complicated to avoid glitching lines since
1145 * we're called before pad retention is turned off.
1147 static int __maybe_unused
samsung_pinctrl_resume(struct device
*dev
)
1149 struct samsung_pinctrl_drv_data
*drvdata
= dev_get_drvdata(dev
);
1152 if (drvdata
->resume
)
1153 drvdata
->resume(drvdata
);
1155 for (i
= 0; i
< drvdata
->nr_banks
; i
++) {
1156 struct samsung_pin_bank
*bank
= &drvdata
->pin_banks
[i
];
1157 void __iomem
*reg
= bank
->pctl_base
+ bank
->pctl_offset
;
1158 const u8
*offs
= bank
->type
->reg_offset
;
1159 const u8
*widths
= bank
->type
->fld_width
;
1160 enum pincfg_type type
;
1162 /* Registers without a powerdown config aren't lost */
1163 if (!widths
[PINCFG_TYPE_CON_PDN
])
1166 if (widths
[PINCFG_TYPE_FUNC
] * bank
->nr_pins
> 32) {
1167 /* Some banks have two config registers */
1168 pr_debug("%s @ %p (con %#010x %08x => %#010x %08x)\n",
1170 readl(reg
+ offs
[PINCFG_TYPE_FUNC
]),
1171 readl(reg
+ offs
[PINCFG_TYPE_FUNC
] + 4),
1172 bank
->pm_save
[PINCFG_TYPE_FUNC
],
1173 bank
->pm_save
[PINCFG_TYPE_NUM
]);
1174 writel(bank
->pm_save
[PINCFG_TYPE_NUM
],
1175 reg
+ offs
[PINCFG_TYPE_FUNC
] + 4);
1177 pr_debug("%s @ %p (con %#010x => %#010x)\n", bank
->name
,
1178 reg
, readl(reg
+ offs
[PINCFG_TYPE_FUNC
]),
1179 bank
->pm_save
[PINCFG_TYPE_FUNC
]);
1181 for (type
= 0; type
< PINCFG_TYPE_NUM
; type
++)
1183 writel(bank
->pm_save
[type
], reg
+ offs
[type
]);
1186 if (drvdata
->retention_ctrl
&& drvdata
->retention_ctrl
->disable
)
1187 drvdata
->retention_ctrl
->disable(drvdata
);
1192 static const struct of_device_id samsung_pinctrl_dt_match
[] = {
1193 #ifdef CONFIG_PINCTRL_EXYNOS
1194 { .compatible
= "samsung,exynos3250-pinctrl",
1195 .data
= (void *)exynos3250_pin_ctrl
},
1196 { .compatible
= "samsung,exynos4210-pinctrl",
1197 .data
= (void *)exynos4210_pin_ctrl
},
1198 { .compatible
= "samsung,exynos4x12-pinctrl",
1199 .data
= (void *)exynos4x12_pin_ctrl
},
1200 { .compatible
= "samsung,exynos5250-pinctrl",
1201 .data
= (void *)exynos5250_pin_ctrl
},
1202 { .compatible
= "samsung,exynos5260-pinctrl",
1203 .data
= (void *)exynos5260_pin_ctrl
},
1204 { .compatible
= "samsung,exynos5410-pinctrl",
1205 .data
= (void *)exynos5410_pin_ctrl
},
1206 { .compatible
= "samsung,exynos5420-pinctrl",
1207 .data
= (void *)exynos5420_pin_ctrl
},
1208 { .compatible
= "samsung,exynos5433-pinctrl",
1209 .data
= (void *)exynos5433_pin_ctrl
},
1210 { .compatible
= "samsung,s5pv210-pinctrl",
1211 .data
= (void *)s5pv210_pin_ctrl
},
1212 { .compatible
= "samsung,exynos7-pinctrl",
1213 .data
= (void *)exynos7_pin_ctrl
},
1215 #ifdef CONFIG_PINCTRL_S3C64XX
1216 { .compatible
= "samsung,s3c64xx-pinctrl",
1217 .data
= s3c64xx_pin_ctrl
},
1219 #ifdef CONFIG_PINCTRL_S3C24XX
1220 { .compatible
= "samsung,s3c2412-pinctrl",
1221 .data
= s3c2412_pin_ctrl
},
1222 { .compatible
= "samsung,s3c2416-pinctrl",
1223 .data
= s3c2416_pin_ctrl
},
1224 { .compatible
= "samsung,s3c2440-pinctrl",
1225 .data
= s3c2440_pin_ctrl
},
1226 { .compatible
= "samsung,s3c2450-pinctrl",
1227 .data
= s3c2450_pin_ctrl
},
1231 MODULE_DEVICE_TABLE(of
, samsung_pinctrl_dt_match
);
1233 static const struct dev_pm_ops samsung_pinctrl_pm_ops
= {
1234 SET_LATE_SYSTEM_SLEEP_PM_OPS(samsung_pinctrl_suspend
,
1235 samsung_pinctrl_resume
)
1238 static struct platform_driver samsung_pinctrl_driver
= {
1239 .probe
= samsung_pinctrl_probe
,
1241 .name
= "samsung-pinctrl",
1242 .of_match_table
= samsung_pinctrl_dt_match
,
1243 .suppress_bind_attrs
= true,
1244 .pm
= &samsung_pinctrl_pm_ops
,
1248 static int __init
samsung_pinctrl_drv_register(void)
1250 return platform_driver_register(&samsung_pinctrl_driver
);
1252 postcore_initcall(samsung_pinctrl_drv_register
);
1254 static void __exit
samsung_pinctrl_drv_unregister(void)
1256 platform_driver_unregister(&samsung_pinctrl_driver
);
1258 module_exit(samsung_pinctrl_drv_unregister
);
1260 MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>");
1261 MODULE_DESCRIPTION("Samsung pinctrl driver");
1262 MODULE_LICENSE("GPL v2");