2 * Allwinner A1X SoCs pinctrl driver.
4 * Copyright (C) 2012 Maxime Ripard
6 * Maxime Ripard <maxime.ripard@free-electrons.com>
8 * This file is licensed under the terms of the GNU General Public
9 * License version 2. This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
14 #include <linux/clk.h>
15 #include <linux/gpio.h>
16 #include <linux/irqdomain.h>
17 #include <linux/irqchip/chained_irq.h>
18 #include <linux/module.h>
20 #include <linux/of_address.h>
21 #include <linux/of_device.h>
22 #include <linux/of_irq.h>
23 #include <linux/pinctrl/consumer.h>
24 #include <linux/pinctrl/machine.h>
25 #include <linux/pinctrl/pinctrl.h>
26 #include <linux/pinctrl/pinconf-generic.h>
27 #include <linux/pinctrl/pinmux.h>
28 #include <linux/platform_device.h>
29 #include <linux/slab.h>
32 #include "../../gpio/gpiolib.h"
33 #include "pinctrl-sunxi.h"
35 static struct irq_chip sunxi_pinctrl_edge_irq_chip;
36 static struct irq_chip sunxi_pinctrl_level_irq_chip;
38 static struct sunxi_pinctrl_group *
39 sunxi_pinctrl_find_group_by_name(struct sunxi_pinctrl *pctl, const char *group)
43 for (i = 0; i < pctl->ngroups; i++) {
44 struct sunxi_pinctrl_group *grp = pctl->groups + i;
46 if (!strcmp(grp->name, group))
53 static struct sunxi_pinctrl_function *
54 sunxi_pinctrl_find_function_by_name(struct sunxi_pinctrl *pctl,
57 struct sunxi_pinctrl_function *func = pctl->functions;
60 for (i = 0; i < pctl->nfunctions; i++) {
64 if (!strcmp(func[i].name, name))
71 static struct sunxi_desc_function *
72 sunxi_pinctrl_desc_find_function_by_name(struct sunxi_pinctrl *pctl,
74 const char *func_name)
78 for (i = 0; i < pctl->desc->npins; i++) {
79 const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
81 if (!strcmp(pin->pin.name, pin_name)) {
82 struct sunxi_desc_function *func = pin->functions;
85 if (!strcmp(func->name, func_name))
96 static struct sunxi_desc_function *
97 sunxi_pinctrl_desc_find_function_by_pin(struct sunxi_pinctrl *pctl,
99 const char *func_name)
103 for (i = 0; i < pctl->desc->npins; i++) {
104 const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
106 if (pin->pin.number == pin_num) {
107 struct sunxi_desc_function *func = pin->functions;
110 if (!strcmp(func->name, func_name))
121 static int sunxi_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
123 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
125 return pctl->ngroups;
128 static const char *sunxi_pctrl_get_group_name(struct pinctrl_dev *pctldev,
131 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
133 return pctl->groups[group].name;
136 static int sunxi_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
138 const unsigned **pins,
141 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
143 *pins = (unsigned *)&pctl->groups[group].pin;
149 static int sunxi_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
150 struct device_node *node,
151 struct pinctrl_map **map,
154 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
155 unsigned long *pinconfig;
156 struct property *prop;
157 const char *function;
159 int ret, nmaps, i = 0;
165 ret = of_property_read_string(node, "allwinner,function", &function);
168 "missing allwinner,function property in node %s\n",
173 nmaps = of_property_count_strings(node, "allwinner,pins") * 2;
176 "missing allwinner,pins property in node %s\n",
181 *map = kmalloc(nmaps * sizeof(struct pinctrl_map), GFP_KERNEL);
185 of_property_for_each_string(node, "allwinner,pins", prop, group) {
186 struct sunxi_pinctrl_group *grp =
187 sunxi_pinctrl_find_group_by_name(pctl, group);
188 int j = 0, configlen = 0;
191 dev_err(pctl->dev, "unknown pin %s", group);
195 if (!sunxi_pinctrl_desc_find_function_by_name(pctl,
198 dev_err(pctl->dev, "unsupported function %s on pin %s",
203 (*map)[i].type = PIN_MAP_TYPE_MUX_GROUP;
204 (*map)[i].data.mux.group = group;
205 (*map)[i].data.mux.function = function;
209 (*map)[i].type = PIN_MAP_TYPE_CONFIGS_GROUP;
210 (*map)[i].data.configs.group_or_pin = group;
212 if (of_find_property(node, "allwinner,drive", NULL))
214 if (of_find_property(node, "allwinner,pull", NULL))
217 pinconfig = kzalloc(configlen * sizeof(*pinconfig), GFP_KERNEL);
223 if (!of_property_read_u32(node, "allwinner,drive", &val)) {
224 u16 strength = (val + 1) * 10;
226 pinconf_to_config_packed(PIN_CONFIG_DRIVE_STRENGTH,
230 if (!of_property_read_u32(node, "allwinner,pull", &val)) {
231 enum pin_config_param pull = PIN_CONFIG_END;
233 pull = PIN_CONFIG_BIAS_PULL_UP;
235 pull = PIN_CONFIG_BIAS_PULL_DOWN;
236 pinconfig[j++] = pinconf_to_config_packed(pull, 0);
239 (*map)[i].data.configs.configs = pinconfig;
240 (*map)[i].data.configs.num_configs = configlen;
250 static void sunxi_pctrl_dt_free_map(struct pinctrl_dev *pctldev,
251 struct pinctrl_map *map,
256 for (i = 0; i < num_maps; i++) {
257 if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
258 kfree(map[i].data.configs.configs);
264 static const struct pinctrl_ops sunxi_pctrl_ops = {
265 .dt_node_to_map = sunxi_pctrl_dt_node_to_map,
266 .dt_free_map = sunxi_pctrl_dt_free_map,
267 .get_groups_count = sunxi_pctrl_get_groups_count,
268 .get_group_name = sunxi_pctrl_get_group_name,
269 .get_group_pins = sunxi_pctrl_get_group_pins,
272 static int sunxi_pconf_group_get(struct pinctrl_dev *pctldev,
274 unsigned long *config)
276 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
278 *config = pctl->groups[group].config;
283 static int sunxi_pconf_group_set(struct pinctrl_dev *pctldev,
285 unsigned long *configs,
286 unsigned num_configs)
288 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
289 struct sunxi_pinctrl_group *g = &pctl->groups[group];
291 unsigned pin = g->pin - pctl->desc->pin_base;
297 spin_lock_irqsave(&pctl->lock, flags);
299 for (i = 0; i < num_configs; i++) {
300 switch (pinconf_to_config_param(configs[i])) {
301 case PIN_CONFIG_DRIVE_STRENGTH:
302 strength = pinconf_to_config_argument(configs[i]);
304 spin_unlock_irqrestore(&pctl->lock, flags);
308 * We convert from mA to what the register expects:
314 dlevel = strength / 10 - 1;
315 val = readl(pctl->membase + sunxi_dlevel_reg(pin));
316 mask = DLEVEL_PINS_MASK << sunxi_dlevel_offset(pin);
318 | dlevel << sunxi_dlevel_offset(pin),
319 pctl->membase + sunxi_dlevel_reg(pin));
321 case PIN_CONFIG_BIAS_PULL_UP:
322 val = readl(pctl->membase + sunxi_pull_reg(pin));
323 mask = PULL_PINS_MASK << sunxi_pull_offset(pin);
324 writel((val & ~mask) | 1 << sunxi_pull_offset(pin),
325 pctl->membase + sunxi_pull_reg(pin));
327 case PIN_CONFIG_BIAS_PULL_DOWN:
328 val = readl(pctl->membase + sunxi_pull_reg(pin));
329 mask = PULL_PINS_MASK << sunxi_pull_offset(pin);
330 writel((val & ~mask) | 2 << sunxi_pull_offset(pin),
331 pctl->membase + sunxi_pull_reg(pin));
336 /* cache the config value */
337 g->config = configs[i];
338 } /* for each config */
340 spin_unlock_irqrestore(&pctl->lock, flags);
345 static const struct pinconf_ops sunxi_pconf_ops = {
346 .pin_config_group_get = sunxi_pconf_group_get,
347 .pin_config_group_set = sunxi_pconf_group_set,
350 static int sunxi_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
352 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
354 return pctl->nfunctions;
357 static const char *sunxi_pmx_get_func_name(struct pinctrl_dev *pctldev,
360 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
362 return pctl->functions[function].name;
365 static int sunxi_pmx_get_func_groups(struct pinctrl_dev *pctldev,
367 const char * const **groups,
368 unsigned * const num_groups)
370 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
372 *groups = pctl->functions[function].groups;
373 *num_groups = pctl->functions[function].ngroups;
378 static void sunxi_pmx_set(struct pinctrl_dev *pctldev,
382 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
386 spin_lock_irqsave(&pctl->lock, flags);
388 pin -= pctl->desc->pin_base;
389 val = readl(pctl->membase + sunxi_mux_reg(pin));
390 mask = MUX_PINS_MASK << sunxi_mux_offset(pin);
391 writel((val & ~mask) | config << sunxi_mux_offset(pin),
392 pctl->membase + sunxi_mux_reg(pin));
394 spin_unlock_irqrestore(&pctl->lock, flags);
397 static int sunxi_pmx_set_mux(struct pinctrl_dev *pctldev,
401 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
402 struct sunxi_pinctrl_group *g = pctl->groups + group;
403 struct sunxi_pinctrl_function *func = pctl->functions + function;
404 struct sunxi_desc_function *desc =
405 sunxi_pinctrl_desc_find_function_by_name(pctl,
412 sunxi_pmx_set(pctldev, g->pin, desc->muxval);
418 sunxi_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
419 struct pinctrl_gpio_range *range,
423 struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
424 struct sunxi_desc_function *desc;
432 desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, offset, func);
436 sunxi_pmx_set(pctldev, offset, desc->muxval);
441 static const struct pinmux_ops sunxi_pmx_ops = {
442 .get_functions_count = sunxi_pmx_get_funcs_cnt,
443 .get_function_name = sunxi_pmx_get_func_name,
444 .get_function_groups = sunxi_pmx_get_func_groups,
445 .set_mux = sunxi_pmx_set_mux,
446 .gpio_set_direction = sunxi_pmx_gpio_set_direction,
449 static int sunxi_pinctrl_gpio_request(struct gpio_chip *chip, unsigned offset)
451 return pinctrl_request_gpio(chip->base + offset);
454 static void sunxi_pinctrl_gpio_free(struct gpio_chip *chip, unsigned offset)
456 pinctrl_free_gpio(chip->base + offset);
459 static int sunxi_pinctrl_gpio_direction_input(struct gpio_chip *chip,
462 return pinctrl_gpio_direction_input(chip->base + offset);
465 static int sunxi_pinctrl_gpio_get(struct gpio_chip *chip, unsigned offset)
467 struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev);
468 u32 reg = sunxi_data_reg(offset);
469 u8 index = sunxi_data_offset(offset);
470 u32 set_mux = pctl->desc->irq_read_needs_mux &&
471 test_bit(FLAG_USED_AS_IRQ, &chip->desc[offset].flags);
475 sunxi_pmx_set(pctl->pctl_dev, offset, SUN4I_FUNC_INPUT);
477 val = (readl(pctl->membase + reg) >> index) & DATA_PINS_MASK;
480 sunxi_pmx_set(pctl->pctl_dev, offset, SUN4I_FUNC_IRQ);
485 static void sunxi_pinctrl_gpio_set(struct gpio_chip *chip,
486 unsigned offset, int value)
488 struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev);
489 u32 reg = sunxi_data_reg(offset);
490 u8 index = sunxi_data_offset(offset);
494 spin_lock_irqsave(&pctl->lock, flags);
496 regval = readl(pctl->membase + reg);
499 regval |= BIT(index);
501 regval &= ~(BIT(index));
503 writel(regval, pctl->membase + reg);
505 spin_unlock_irqrestore(&pctl->lock, flags);
508 static int sunxi_pinctrl_gpio_direction_output(struct gpio_chip *chip,
509 unsigned offset, int value)
511 sunxi_pinctrl_gpio_set(chip, offset, value);
512 return pinctrl_gpio_direction_output(chip->base + offset);
515 static int sunxi_pinctrl_gpio_of_xlate(struct gpio_chip *gc,
516 const struct of_phandle_args *gpiospec,
521 base = PINS_PER_BANK * gpiospec->args[0];
522 pin = base + gpiospec->args[1];
528 *flags = gpiospec->args[2];
533 static int sunxi_pinctrl_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
535 struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev);
536 struct sunxi_desc_function *desc;
537 unsigned pinnum = pctl->desc->pin_base + offset;
540 if (offset >= chip->ngpio)
543 desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, pinnum, "irq");
547 irqnum = desc->irqbank * IRQ_PER_BANK + desc->irqnum;
549 dev_dbg(chip->dev, "%s: request IRQ for GPIO %d, return %d\n",
550 chip->label, offset + chip->base, irqnum);
552 return irq_find_mapping(pctl->domain, irqnum);
555 static int sunxi_pinctrl_irq_request_resources(struct irq_data *d)
557 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
558 struct sunxi_desc_function *func;
561 func = sunxi_pinctrl_desc_find_function_by_pin(pctl,
562 pctl->irq_array[d->hwirq], "irq");
566 ret = gpiochip_lock_as_irq(pctl->chip,
567 pctl->irq_array[d->hwirq] - pctl->desc->pin_base);
569 dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n",
574 /* Change muxing to INT mode */
575 sunxi_pmx_set(pctl->pctl_dev, pctl->irq_array[d->hwirq], func->muxval);
580 static void sunxi_pinctrl_irq_release_resources(struct irq_data *d)
582 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
584 gpiochip_unlock_as_irq(pctl->chip,
585 pctl->irq_array[d->hwirq] - pctl->desc->pin_base);
588 static int sunxi_pinctrl_irq_set_type(struct irq_data *d, unsigned int type)
590 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
591 u32 reg = sunxi_irq_cfg_reg(d->hwirq);
592 u8 index = sunxi_irq_cfg_offset(d->hwirq);
598 case IRQ_TYPE_EDGE_RISING:
599 mode = IRQ_EDGE_RISING;
601 case IRQ_TYPE_EDGE_FALLING:
602 mode = IRQ_EDGE_FALLING;
604 case IRQ_TYPE_EDGE_BOTH:
605 mode = IRQ_EDGE_BOTH;
607 case IRQ_TYPE_LEVEL_HIGH:
608 mode = IRQ_LEVEL_HIGH;
610 case IRQ_TYPE_LEVEL_LOW:
611 mode = IRQ_LEVEL_LOW;
617 spin_lock_irqsave(&pctl->lock, flags);
619 if (type & IRQ_TYPE_LEVEL_MASK)
620 __irq_set_chip_handler_name_locked(d->irq,
621 &sunxi_pinctrl_level_irq_chip,
622 handle_fasteoi_irq, NULL);
624 __irq_set_chip_handler_name_locked(d->irq,
625 &sunxi_pinctrl_edge_irq_chip,
626 handle_edge_irq, NULL);
628 regval = readl(pctl->membase + reg);
629 regval &= ~(IRQ_CFG_IRQ_MASK << index);
630 writel(regval | (mode << index), pctl->membase + reg);
632 spin_unlock_irqrestore(&pctl->lock, flags);
637 static void sunxi_pinctrl_irq_ack(struct irq_data *d)
639 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
640 u32 status_reg = sunxi_irq_status_reg(d->hwirq);
641 u8 status_idx = sunxi_irq_status_offset(d->hwirq);
644 writel(1 << status_idx, pctl->membase + status_reg);
647 static void sunxi_pinctrl_irq_mask(struct irq_data *d)
649 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
650 u32 reg = sunxi_irq_ctrl_reg(d->hwirq);
651 u8 idx = sunxi_irq_ctrl_offset(d->hwirq);
655 spin_lock_irqsave(&pctl->lock, flags);
658 val = readl(pctl->membase + reg);
659 writel(val & ~(1 << idx), pctl->membase + reg);
661 spin_unlock_irqrestore(&pctl->lock, flags);
664 static void sunxi_pinctrl_irq_unmask(struct irq_data *d)
666 struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d);
667 u32 reg = sunxi_irq_ctrl_reg(d->hwirq);
668 u8 idx = sunxi_irq_ctrl_offset(d->hwirq);
672 spin_lock_irqsave(&pctl->lock, flags);
675 val = readl(pctl->membase + reg);
676 writel(val | (1 << idx), pctl->membase + reg);
678 spin_unlock_irqrestore(&pctl->lock, flags);
681 static void sunxi_pinctrl_irq_ack_unmask(struct irq_data *d)
683 sunxi_pinctrl_irq_ack(d);
684 sunxi_pinctrl_irq_unmask(d);
687 static struct irq_chip sunxi_pinctrl_edge_irq_chip = {
688 .name = "sunxi_pio_edge",
689 .irq_ack = sunxi_pinctrl_irq_ack,
690 .irq_mask = sunxi_pinctrl_irq_mask,
691 .irq_unmask = sunxi_pinctrl_irq_unmask,
692 .irq_request_resources = sunxi_pinctrl_irq_request_resources,
693 .irq_release_resources = sunxi_pinctrl_irq_release_resources,
694 .irq_set_type = sunxi_pinctrl_irq_set_type,
695 .flags = IRQCHIP_SKIP_SET_WAKE,
698 static struct irq_chip sunxi_pinctrl_level_irq_chip = {
699 .name = "sunxi_pio_level",
700 .irq_eoi = sunxi_pinctrl_irq_ack,
701 .irq_mask = sunxi_pinctrl_irq_mask,
702 .irq_unmask = sunxi_pinctrl_irq_unmask,
703 /* Define irq_enable / disable to avoid spurious irqs for drivers
704 * using these to suppress irqs while they clear the irq source */
705 .irq_enable = sunxi_pinctrl_irq_ack_unmask,
706 .irq_disable = sunxi_pinctrl_irq_mask,
707 .irq_request_resources = sunxi_pinctrl_irq_request_resources,
708 .irq_release_resources = sunxi_pinctrl_irq_release_resources,
709 .irq_set_type = sunxi_pinctrl_irq_set_type,
710 .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_EOI_THREADED |
711 IRQCHIP_EOI_IF_HANDLED,
714 static int sunxi_pinctrl_irq_of_xlate(struct irq_domain *d,
715 struct device_node *node,
717 unsigned int intsize,
718 unsigned long *out_hwirq,
719 unsigned int *out_type)
721 struct sunxi_desc_function *desc;
727 base = PINS_PER_BANK * intspec[0];
728 pin = base + intspec[1];
730 desc = sunxi_pinctrl_desc_find_function_by_pin(d->host_data,
735 *out_hwirq = desc->irqbank * PINS_PER_BANK + desc->irqnum;
736 *out_type = intspec[2];
741 static struct irq_domain_ops sunxi_pinctrl_irq_domain_ops = {
742 .xlate = sunxi_pinctrl_irq_of_xlate,
745 static void sunxi_pinctrl_irq_handler(unsigned __irq, struct irq_desc *desc)
747 unsigned int irq = irq_desc_get_irq(desc);
748 struct irq_chip *chip = irq_desc_get_chip(desc);
749 struct sunxi_pinctrl *pctl = irq_desc_get_handler_data(desc);
750 unsigned long bank, reg, val;
752 for (bank = 0; bank < pctl->desc->irq_banks; bank++)
753 if (irq == pctl->irq[bank])
756 if (bank == pctl->desc->irq_banks)
759 reg = sunxi_irq_status_reg_from_bank(bank);
760 val = readl(pctl->membase + reg);
765 chained_irq_enter(chip, desc);
766 for_each_set_bit(irqoffset, &val, IRQ_PER_BANK) {
767 int pin_irq = irq_find_mapping(pctl->domain,
768 bank * IRQ_PER_BANK + irqoffset);
769 generic_handle_irq(pin_irq);
771 chained_irq_exit(chip, desc);
775 static int sunxi_pinctrl_add_function(struct sunxi_pinctrl *pctl,
778 struct sunxi_pinctrl_function *func = pctl->functions;
781 /* function already there */
782 if (strcmp(func->name, name) == 0) {
797 static int sunxi_pinctrl_build_state(struct platform_device *pdev)
799 struct sunxi_pinctrl *pctl = platform_get_drvdata(pdev);
802 pctl->ngroups = pctl->desc->npins;
804 /* Allocate groups */
805 pctl->groups = devm_kzalloc(&pdev->dev,
806 pctl->ngroups * sizeof(*pctl->groups),
811 for (i = 0; i < pctl->desc->npins; i++) {
812 const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
813 struct sunxi_pinctrl_group *group = pctl->groups + i;
815 group->name = pin->pin.name;
816 group->pin = pin->pin.number;
820 * We suppose that we won't have any more functions than pins,
821 * we'll reallocate that later anyway
823 pctl->functions = devm_kzalloc(&pdev->dev,
824 pctl->desc->npins * sizeof(*pctl->functions),
826 if (!pctl->functions)
829 /* Count functions and their associated groups */
830 for (i = 0; i < pctl->desc->npins; i++) {
831 const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
832 struct sunxi_desc_function *func = pin->functions;
835 /* Create interrupt mapping while we're at it */
836 if (!strcmp(func->name, "irq")) {
837 int irqnum = func->irqnum + func->irqbank * IRQ_PER_BANK;
838 pctl->irq_array[irqnum] = pin->pin.number;
841 sunxi_pinctrl_add_function(pctl, func->name);
846 pctl->functions = krealloc(pctl->functions,
847 pctl->nfunctions * sizeof(*pctl->functions),
850 for (i = 0; i < pctl->desc->npins; i++) {
851 const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
852 struct sunxi_desc_function *func = pin->functions;
855 struct sunxi_pinctrl_function *func_item;
856 const char **func_grp;
858 func_item = sunxi_pinctrl_find_function_by_name(pctl,
863 if (!func_item->groups) {
865 devm_kzalloc(&pdev->dev,
866 func_item->ngroups * sizeof(*func_item->groups),
868 if (!func_item->groups)
872 func_grp = func_item->groups;
876 *func_grp = pin->pin.name;
884 int sunxi_pinctrl_init(struct platform_device *pdev,
885 const struct sunxi_pinctrl_desc *desc)
887 struct device_node *node = pdev->dev.of_node;
888 struct pinctrl_desc *pctrl_desc;
889 struct pinctrl_pin_desc *pins;
890 struct sunxi_pinctrl *pctl;
891 struct resource *res;
892 int i, ret, last_pin;
895 pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
898 platform_set_drvdata(pdev, pctl);
900 spin_lock_init(&pctl->lock);
902 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
903 pctl->membase = devm_ioremap_resource(&pdev->dev, res);
904 if (IS_ERR(pctl->membase))
905 return PTR_ERR(pctl->membase);
907 pctl->dev = &pdev->dev;
910 pctl->irq_array = devm_kcalloc(&pdev->dev,
911 IRQ_PER_BANK * pctl->desc->irq_banks,
912 sizeof(*pctl->irq_array),
914 if (!pctl->irq_array)
917 ret = sunxi_pinctrl_build_state(pdev);
919 dev_err(&pdev->dev, "dt probe failed: %d\n", ret);
923 pins = devm_kzalloc(&pdev->dev,
924 pctl->desc->npins * sizeof(*pins),
929 for (i = 0; i < pctl->desc->npins; i++)
930 pins[i] = pctl->desc->pins[i].pin;
932 pctrl_desc = devm_kzalloc(&pdev->dev,
938 pctrl_desc->name = dev_name(&pdev->dev);
939 pctrl_desc->owner = THIS_MODULE;
940 pctrl_desc->pins = pins;
941 pctrl_desc->npins = pctl->desc->npins;
942 pctrl_desc->confops = &sunxi_pconf_ops;
943 pctrl_desc->pctlops = &sunxi_pctrl_ops;
944 pctrl_desc->pmxops = &sunxi_pmx_ops;
946 pctl->pctl_dev = pinctrl_register(pctrl_desc,
948 if (IS_ERR(pctl->pctl_dev)) {
949 dev_err(&pdev->dev, "couldn't register pinctrl driver\n");
950 return PTR_ERR(pctl->pctl_dev);
953 pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL);
959 last_pin = pctl->desc->pins[pctl->desc->npins - 1].pin.number;
960 pctl->chip->owner = THIS_MODULE;
961 pctl->chip->request = sunxi_pinctrl_gpio_request,
962 pctl->chip->free = sunxi_pinctrl_gpio_free,
963 pctl->chip->direction_input = sunxi_pinctrl_gpio_direction_input,
964 pctl->chip->direction_output = sunxi_pinctrl_gpio_direction_output,
965 pctl->chip->get = sunxi_pinctrl_gpio_get,
966 pctl->chip->set = sunxi_pinctrl_gpio_set,
967 pctl->chip->of_xlate = sunxi_pinctrl_gpio_of_xlate,
968 pctl->chip->to_irq = sunxi_pinctrl_gpio_to_irq,
969 pctl->chip->of_gpio_n_cells = 3,
970 pctl->chip->can_sleep = false,
971 pctl->chip->ngpio = round_up(last_pin, PINS_PER_BANK) -
972 pctl->desc->pin_base;
973 pctl->chip->label = dev_name(&pdev->dev);
974 pctl->chip->dev = &pdev->dev;
975 pctl->chip->base = pctl->desc->pin_base;
977 ret = gpiochip_add(pctl->chip);
981 for (i = 0; i < pctl->desc->npins; i++) {
982 const struct sunxi_desc_pin *pin = pctl->desc->pins + i;
984 ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev),
985 pin->pin.number - pctl->desc->pin_base,
991 clk = devm_clk_get(&pdev->dev, NULL);
997 ret = clk_prepare_enable(clk);
1001 pctl->irq = devm_kcalloc(&pdev->dev,
1002 pctl->desc->irq_banks,
1010 for (i = 0; i < pctl->desc->irq_banks; i++) {
1011 pctl->irq[i] = platform_get_irq(pdev, i);
1012 if (pctl->irq[i] < 0) {
1018 pctl->domain = irq_domain_add_linear(node,
1019 pctl->desc->irq_banks * IRQ_PER_BANK,
1020 &sunxi_pinctrl_irq_domain_ops,
1022 if (!pctl->domain) {
1023 dev_err(&pdev->dev, "Couldn't register IRQ domain\n");
1028 for (i = 0; i < (pctl->desc->irq_banks * IRQ_PER_BANK); i++) {
1029 int irqno = irq_create_mapping(pctl->domain, i);
1031 irq_set_chip_and_handler(irqno, &sunxi_pinctrl_edge_irq_chip,
1033 irq_set_chip_data(irqno, pctl);
1036 for (i = 0; i < pctl->desc->irq_banks; i++) {
1037 /* Mask and clear all IRQs before registering a handler */
1038 writel(0, pctl->membase + sunxi_irq_ctrl_reg_from_bank(i));
1040 pctl->membase + sunxi_irq_status_reg_from_bank(i));
1042 irq_set_chained_handler_and_data(pctl->irq[i],
1043 sunxi_pinctrl_irq_handler,
1047 dev_info(&pdev->dev, "initialized sunXi PIO driver\n");
1052 clk_disable_unprepare(clk);
1054 gpiochip_remove(pctl->chip);
1056 pinctrl_unregister(pctl->pctl_dev);