1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Microsemi/Microchip SoCs serial gpio driver
5 * Author: Lars Povlsen <lars.povlsen@microchip.com>
7 * Copyright (c) 2020 Microchip Technology Inc. and its subsidiaries.
10 #include <linux/bitfield.h>
11 #include <linux/bits.h>
12 #include <linux/clk.h>
13 #include <linux/gpio/driver.h>
15 #include <linux/mod_devicetable.h>
16 #include <linux/module.h>
17 #include <linux/pinctrl/pinmux.h>
18 #include <linux/platform_device.h>
19 #include <linux/property.h>
24 #define SGPIO_BITS_PER_WORD 32
25 #define SGPIO_MAX_BITS 4
26 #define SGPIO_SRC_BITS 3 /* 3 bit wide field per pin */
49 SGPIO_FLAGS_HAS_IRQ = BIT(0),
52 struct sgpio_properties {
58 #define SGPIO_LUTON_AUTO_REPEAT BIT(5)
59 #define SGPIO_LUTON_PORT_WIDTH GENMASK(3, 2)
60 #define SGPIO_LUTON_CLK_FREQ GENMASK(11, 0)
61 #define SGPIO_LUTON_BIT_SOURCE GENMASK(11, 0)
63 #define SGPIO_OCELOT_AUTO_REPEAT BIT(10)
64 #define SGPIO_OCELOT_PORT_WIDTH GENMASK(8, 7)
65 #define SGPIO_OCELOT_CLK_FREQ GENMASK(19, 8)
66 #define SGPIO_OCELOT_BIT_SOURCE GENMASK(23, 12)
68 #define SGPIO_SPARX5_AUTO_REPEAT BIT(6)
69 #define SGPIO_SPARX5_PORT_WIDTH GENMASK(4, 3)
70 #define SGPIO_SPARX5_CLK_FREQ GENMASK(19, 8)
71 #define SGPIO_SPARX5_BIT_SOURCE GENMASK(23, 12)
73 #define SGPIO_MASTER_INTR_ENA BIT(0)
75 #define SGPIO_INT_TRG_LEVEL 0
76 #define SGPIO_INT_TRG_EDGE 1
77 #define SGPIO_INT_TRG_EDGE_FALL 2
78 #define SGPIO_INT_TRG_EDGE_RISE 3
80 #define SGPIO_TRG_LEVEL_HIGH 0
81 #define SGPIO_TRG_LEVEL_LOW 1
83 static const struct sgpio_properties properties_luton = {
84 .arch = SGPIO_ARCH_LUTON,
85 .regoff = { 0x00, 0x09, 0x29, 0x2a, 0x2b },
88 static const struct sgpio_properties properties_ocelot = {
89 .arch = SGPIO_ARCH_OCELOT,
90 .regoff = { 0x00, 0x06, 0x26, 0x04, 0x05 },
93 static const struct sgpio_properties properties_sparx5 = {
94 .arch = SGPIO_ARCH_SPARX5,
95 .flags = SGPIO_FLAGS_HAS_IRQ,
96 .regoff = { 0x00, 0x06, 0x26, 0x04, 0x05, 0x2a, 0x32, 0x3a, 0x3e, 0x42 },
99 static const char * const functions[] = { "gpio" };
102 struct sgpio_priv *priv;
104 struct gpio_chip gpio;
105 struct pinctrl_desc pctl_desc;
110 struct sgpio_bank in;
111 struct sgpio_bank out;
116 const struct sgpio_properties *properties;
119 struct sgpio_port_addr {
124 static inline void sgpio_pin_to_addr(struct sgpio_priv *priv, int pin,
125 struct sgpio_port_addr *addr)
127 addr->port = pin / priv->bitcount;
128 addr->bit = pin % priv->bitcount;
131 static inline int sgpio_addr_to_pin(struct sgpio_priv *priv, int port, int bit)
133 return bit + port * priv->bitcount;
136 static inline u32 sgpio_readl(struct sgpio_priv *priv, u32 rno, u32 off)
138 u32 __iomem *reg = &priv->regs[priv->properties->regoff[rno] + off];
143 static inline void sgpio_writel(struct sgpio_priv *priv,
144 u32 val, u32 rno, u32 off)
146 u32 __iomem *reg = &priv->regs[priv->properties->regoff[rno] + off];
151 static inline void sgpio_clrsetbits(struct sgpio_priv *priv,
152 u32 rno, u32 off, u32 clear, u32 set)
154 u32 __iomem *reg = &priv->regs[priv->properties->regoff[rno] + off];
155 u32 val = readl(reg);
163 static inline void sgpio_configure_bitstream(struct sgpio_priv *priv)
165 int width = priv->bitcount - 1;
168 switch (priv->properties->arch) {
169 case SGPIO_ARCH_LUTON:
170 clr = SGPIO_LUTON_PORT_WIDTH;
171 set = SGPIO_LUTON_AUTO_REPEAT |
172 FIELD_PREP(SGPIO_LUTON_PORT_WIDTH, width);
174 case SGPIO_ARCH_OCELOT:
175 clr = SGPIO_OCELOT_PORT_WIDTH;
176 set = SGPIO_OCELOT_AUTO_REPEAT |
177 FIELD_PREP(SGPIO_OCELOT_PORT_WIDTH, width);
179 case SGPIO_ARCH_SPARX5:
180 clr = SGPIO_SPARX5_PORT_WIDTH;
181 set = SGPIO_SPARX5_AUTO_REPEAT |
182 FIELD_PREP(SGPIO_SPARX5_PORT_WIDTH, width);
187 sgpio_clrsetbits(priv, REG_SIO_CONFIG, 0, clr, set);
190 static inline void sgpio_configure_clock(struct sgpio_priv *priv, u32 clkfrq)
194 switch (priv->properties->arch) {
195 case SGPIO_ARCH_LUTON:
196 clr = SGPIO_LUTON_CLK_FREQ;
197 set = FIELD_PREP(SGPIO_LUTON_CLK_FREQ, clkfrq);
199 case SGPIO_ARCH_OCELOT:
200 clr = SGPIO_OCELOT_CLK_FREQ;
201 set = FIELD_PREP(SGPIO_OCELOT_CLK_FREQ, clkfrq);
203 case SGPIO_ARCH_SPARX5:
204 clr = SGPIO_SPARX5_CLK_FREQ;
205 set = FIELD_PREP(SGPIO_SPARX5_CLK_FREQ, clkfrq);
210 sgpio_clrsetbits(priv, REG_SIO_CLOCK, 0, clr, set);
213 static void sgpio_output_set(struct sgpio_priv *priv,
214 struct sgpio_port_addr *addr,
217 unsigned int bit = SGPIO_SRC_BITS * addr->bit;
220 switch (priv->properties->arch) {
221 case SGPIO_ARCH_LUTON:
222 clr = FIELD_PREP(SGPIO_LUTON_BIT_SOURCE, BIT(bit));
223 set = FIELD_PREP(SGPIO_LUTON_BIT_SOURCE, value << bit);
225 case SGPIO_ARCH_OCELOT:
226 clr = FIELD_PREP(SGPIO_OCELOT_BIT_SOURCE, BIT(bit));
227 set = FIELD_PREP(SGPIO_OCELOT_BIT_SOURCE, value << bit);
229 case SGPIO_ARCH_SPARX5:
230 clr = FIELD_PREP(SGPIO_SPARX5_BIT_SOURCE, BIT(bit));
231 set = FIELD_PREP(SGPIO_SPARX5_BIT_SOURCE, value << bit);
236 sgpio_clrsetbits(priv, REG_PORT_CONFIG, addr->port, clr, set);
239 static int sgpio_output_get(struct sgpio_priv *priv,
240 struct sgpio_port_addr *addr)
242 u32 val, portval = sgpio_readl(priv, REG_PORT_CONFIG, addr->port);
243 unsigned int bit = SGPIO_SRC_BITS * addr->bit;
245 switch (priv->properties->arch) {
246 case SGPIO_ARCH_LUTON:
247 val = FIELD_GET(SGPIO_LUTON_BIT_SOURCE, portval);
249 case SGPIO_ARCH_OCELOT:
250 val = FIELD_GET(SGPIO_OCELOT_BIT_SOURCE, portval);
252 case SGPIO_ARCH_SPARX5:
253 val = FIELD_GET(SGPIO_SPARX5_BIT_SOURCE, portval);
259 return !!(val & BIT(bit));
262 static int sgpio_input_get(struct sgpio_priv *priv,
263 struct sgpio_port_addr *addr)
265 return !!(sgpio_readl(priv, REG_INPUT_DATA, addr->bit) & BIT(addr->port));
268 static int sgpio_pinconf_get(struct pinctrl_dev *pctldev,
269 unsigned int pin, unsigned long *config)
271 struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev);
272 u32 param = pinconf_to_config_param(*config);
273 struct sgpio_priv *priv = bank->priv;
274 struct sgpio_port_addr addr;
277 sgpio_pin_to_addr(priv, pin, &addr);
280 case PIN_CONFIG_INPUT_ENABLE:
281 val = bank->is_input;
284 case PIN_CONFIG_OUTPUT_ENABLE:
285 val = !bank->is_input;
288 case PIN_CONFIG_OUTPUT:
291 val = sgpio_output_get(priv, &addr);
298 *config = pinconf_to_config_packed(param, val);
303 static int sgpio_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
304 unsigned long *configs, unsigned int num_configs)
306 struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev);
307 struct sgpio_priv *priv = bank->priv;
308 struct sgpio_port_addr addr;
312 sgpio_pin_to_addr(priv, pin, &addr);
314 for (cfg = 0; cfg < num_configs; cfg++) {
315 param = pinconf_to_config_param(configs[cfg]);
316 arg = pinconf_to_config_argument(configs[cfg]);
319 case PIN_CONFIG_OUTPUT:
322 sgpio_output_set(priv, &addr, arg);
333 static const struct pinconf_ops sgpio_confops = {
335 .pin_config_get = sgpio_pinconf_get,
336 .pin_config_set = sgpio_pinconf_set,
337 .pin_config_config_dbg_show = pinconf_generic_dump_config,
340 static int sgpio_get_functions_count(struct pinctrl_dev *pctldev)
345 static const char *sgpio_get_function_name(struct pinctrl_dev *pctldev,
346 unsigned int function)
351 static int sgpio_get_function_groups(struct pinctrl_dev *pctldev,
352 unsigned int function,
353 const char *const **groups,
354 unsigned *const num_groups)
357 *num_groups = ARRAY_SIZE(functions);
362 static int sgpio_pinmux_set_mux(struct pinctrl_dev *pctldev,
363 unsigned int selector, unsigned int group)
368 static int sgpio_gpio_set_direction(struct pinctrl_dev *pctldev,
369 struct pinctrl_gpio_range *range,
370 unsigned int pin, bool input)
372 struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev);
374 return (input == bank->is_input) ? 0 : -EINVAL;
377 static int sgpio_gpio_request_enable(struct pinctrl_dev *pctldev,
378 struct pinctrl_gpio_range *range,
381 struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev);
382 struct sgpio_priv *priv = bank->priv;
383 struct sgpio_port_addr addr;
385 sgpio_pin_to_addr(priv, offset, &addr);
387 if ((priv->ports & BIT(addr.port)) == 0) {
388 dev_warn(priv->dev, "Request port %d.%d: Port is not enabled\n",
389 addr.port, addr.bit);
396 static const struct pinmux_ops sgpio_pmx_ops = {
397 .get_functions_count = sgpio_get_functions_count,
398 .get_function_name = sgpio_get_function_name,
399 .get_function_groups = sgpio_get_function_groups,
400 .set_mux = sgpio_pinmux_set_mux,
401 .gpio_set_direction = sgpio_gpio_set_direction,
402 .gpio_request_enable = sgpio_gpio_request_enable,
405 static int sgpio_pctl_get_groups_count(struct pinctrl_dev *pctldev)
407 struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev);
409 return bank->pctl_desc.npins;
412 static const char *sgpio_pctl_get_group_name(struct pinctrl_dev *pctldev,
415 struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev);
417 return bank->pctl_desc.pins[group].name;
420 static int sgpio_pctl_get_group_pins(struct pinctrl_dev *pctldev,
422 const unsigned int **pins,
423 unsigned int *num_pins)
425 struct sgpio_bank *bank = pinctrl_dev_get_drvdata(pctldev);
427 *pins = &bank->pctl_desc.pins[group].number;
433 static const struct pinctrl_ops sgpio_pctl_ops = {
434 .get_groups_count = sgpio_pctl_get_groups_count,
435 .get_group_name = sgpio_pctl_get_group_name,
436 .get_group_pins = sgpio_pctl_get_group_pins,
437 .dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
438 .dt_free_map = pinconf_generic_dt_free_map,
441 static int microchip_sgpio_direction_input(struct gpio_chip *gc, unsigned int gpio)
443 struct sgpio_bank *bank = gpiochip_get_data(gc);
445 /* Fixed-position function */
446 return bank->is_input ? 0 : -EINVAL;
449 static int microchip_sgpio_direction_output(struct gpio_chip *gc,
450 unsigned int gpio, int value)
452 struct sgpio_bank *bank = gpiochip_get_data(gc);
453 struct sgpio_priv *priv = bank->priv;
454 struct sgpio_port_addr addr;
456 /* Fixed-position function */
460 sgpio_pin_to_addr(priv, gpio, &addr);
462 sgpio_output_set(priv, &addr, value);
467 static int microchip_sgpio_get_direction(struct gpio_chip *gc, unsigned int gpio)
469 struct sgpio_bank *bank = gpiochip_get_data(gc);
471 return bank->is_input ? GPIO_LINE_DIRECTION_IN : GPIO_LINE_DIRECTION_OUT;
474 static void microchip_sgpio_set_value(struct gpio_chip *gc,
475 unsigned int gpio, int value)
477 microchip_sgpio_direction_output(gc, gpio, value);
480 static int microchip_sgpio_get_value(struct gpio_chip *gc, unsigned int gpio)
482 struct sgpio_bank *bank = gpiochip_get_data(gc);
483 struct sgpio_priv *priv = bank->priv;
484 struct sgpio_port_addr addr;
486 sgpio_pin_to_addr(priv, gpio, &addr);
488 return bank->is_input ? sgpio_input_get(priv, &addr) : sgpio_output_get(priv, &addr);
491 static int microchip_sgpio_of_xlate(struct gpio_chip *gc,
492 const struct of_phandle_args *gpiospec,
495 struct sgpio_bank *bank = gpiochip_get_data(gc);
496 struct sgpio_priv *priv = bank->priv;
500 * Note that the SGIO pin is defined by *2* numbers, a port
501 * number between 0 and 31, and a bit index, 0 to 3.
503 if (gpiospec->args[0] > SGPIO_BITS_PER_WORD ||
504 gpiospec->args[1] > priv->bitcount)
507 pin = sgpio_addr_to_pin(priv, gpiospec->args[0], gpiospec->args[1]);
513 *flags = gpiospec->args[2];
518 static int microchip_sgpio_get_ports(struct sgpio_priv *priv)
520 const char *range_property_name = "microchip,sgpio-port-ranges";
521 struct device *dev = priv->dev;
522 u32 range_params[64];
525 /* Calculate port mask */
526 nranges = device_property_count_u32(dev, range_property_name);
527 if (nranges < 2 || nranges % 2 || nranges > ARRAY_SIZE(range_params)) {
528 dev_err(dev, "%s port range: '%s' property\n",
529 nranges == -EINVAL ? "Missing" : "Invalid",
530 range_property_name);
534 ret = device_property_read_u32_array(dev, range_property_name,
535 range_params, nranges);
537 dev_err(dev, "failed to parse '%s' property: %d\n",
538 range_property_name, ret);
541 for (i = 0; i < nranges; i += 2) {
544 start = range_params[i];
545 end = range_params[i + 1];
546 if (start > end || end >= SGPIO_BITS_PER_WORD) {
547 dev_err(dev, "Ill-formed port-range [%d:%d]\n",
550 priv->ports |= GENMASK(end, start);
556 static void microchip_sgpio_irq_settype(struct irq_data *data,
560 struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
561 struct sgpio_bank *bank = gpiochip_get_data(chip);
562 unsigned int gpio = irqd_to_hwirq(data);
563 struct sgpio_port_addr addr;
566 sgpio_pin_to_addr(bank->priv, gpio, &addr);
568 /* Disable interrupt while changing type */
569 ena = sgpio_readl(bank->priv, REG_INT_ENABLE, addr.bit);
570 sgpio_writel(bank->priv, ena & ~BIT(addr.port), REG_INT_ENABLE, addr.bit);
572 /* Type value spread over 2 registers sets: low, high bit */
573 sgpio_clrsetbits(bank->priv, REG_INT_TRIGGER, addr.bit,
574 BIT(addr.port), (!!(type & 0x1)) << addr.port);
575 sgpio_clrsetbits(bank->priv, REG_INT_TRIGGER, SGPIO_MAX_BITS + addr.bit,
576 BIT(addr.port), (!!(type & 0x2)) << addr.port);
578 if (type == SGPIO_INT_TRG_LEVEL)
579 sgpio_clrsetbits(bank->priv, REG_INT_POLARITY, addr.bit,
580 BIT(addr.port), polarity << addr.port);
582 /* Possibly re-enable interrupts */
583 sgpio_writel(bank->priv, ena, REG_INT_ENABLE, addr.bit);
586 static void microchip_sgpio_irq_setreg(struct irq_data *data,
590 struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
591 struct sgpio_bank *bank = gpiochip_get_data(chip);
592 unsigned int gpio = irqd_to_hwirq(data);
593 struct sgpio_port_addr addr;
595 sgpio_pin_to_addr(bank->priv, gpio, &addr);
598 sgpio_clrsetbits(bank->priv, reg, addr.bit, BIT(addr.port), 0);
600 sgpio_clrsetbits(bank->priv, reg, addr.bit, 0, BIT(addr.port));
603 static void microchip_sgpio_irq_mask(struct irq_data *data)
605 microchip_sgpio_irq_setreg(data, REG_INT_ENABLE, true);
608 static void microchip_sgpio_irq_unmask(struct irq_data *data)
610 microchip_sgpio_irq_setreg(data, REG_INT_ENABLE, false);
613 static void microchip_sgpio_irq_ack(struct irq_data *data)
615 microchip_sgpio_irq_setreg(data, REG_INT_ACK, false);
618 static int microchip_sgpio_irq_set_type(struct irq_data *data, unsigned int type)
620 type &= IRQ_TYPE_SENSE_MASK;
623 case IRQ_TYPE_EDGE_BOTH:
624 irq_set_handler_locked(data, handle_edge_irq);
625 microchip_sgpio_irq_settype(data, SGPIO_INT_TRG_EDGE, 0);
627 case IRQ_TYPE_EDGE_RISING:
628 irq_set_handler_locked(data, handle_edge_irq);
629 microchip_sgpio_irq_settype(data, SGPIO_INT_TRG_EDGE_RISE, 0);
631 case IRQ_TYPE_EDGE_FALLING:
632 irq_set_handler_locked(data, handle_edge_irq);
633 microchip_sgpio_irq_settype(data, SGPIO_INT_TRG_EDGE_FALL, 0);
635 case IRQ_TYPE_LEVEL_HIGH:
636 irq_set_handler_locked(data, handle_level_irq);
637 microchip_sgpio_irq_settype(data, SGPIO_INT_TRG_LEVEL, SGPIO_TRG_LEVEL_HIGH);
639 case IRQ_TYPE_LEVEL_LOW:
640 irq_set_handler_locked(data, handle_level_irq);
641 microchip_sgpio_irq_settype(data, SGPIO_INT_TRG_LEVEL, SGPIO_TRG_LEVEL_LOW);
650 static const struct irq_chip microchip_sgpio_irqchip = {
652 .irq_mask = microchip_sgpio_irq_mask,
653 .irq_ack = microchip_sgpio_irq_ack,
654 .irq_unmask = microchip_sgpio_irq_unmask,
655 .irq_set_type = microchip_sgpio_irq_set_type,
658 static void sgpio_irq_handler(struct irq_desc *desc)
660 struct irq_chip *parent_chip = irq_desc_get_chip(desc);
661 struct gpio_chip *chip = irq_desc_get_handler_data(desc);
662 struct sgpio_bank *bank = gpiochip_get_data(chip);
663 struct sgpio_priv *priv = bank->priv;
667 for (bit = 0; bit < priv->bitcount; bit++) {
668 val = sgpio_readl(priv, REG_INT_IDENT, bit);
672 chained_irq_enter(parent_chip, desc);
674 for_each_set_bit(port, &val, SGPIO_BITS_PER_WORD) {
675 gpio = sgpio_addr_to_pin(priv, port, bit);
676 generic_handle_domain_irq(chip->irq.domain, gpio);
679 chained_irq_exit(parent_chip, desc);
683 static int microchip_sgpio_register_bank(struct device *dev,
684 struct sgpio_priv *priv,
685 struct fwnode_handle *fwnode,
688 struct pinctrl_pin_desc *pins;
689 struct pinctrl_desc *pctl_desc;
690 struct pinctrl_dev *pctldev;
691 struct sgpio_bank *bank;
692 struct gpio_chip *gc;
696 /* Get overall bank struct */
697 bank = (bankno == 0) ? &priv->in : &priv->out;
700 if (fwnode_property_read_u32(fwnode, "ngpios", &ngpios)) {
701 dev_info(dev, "failed to get number of gpios for bank%d\n",
706 priv->bitcount = ngpios / SGPIO_BITS_PER_WORD;
707 if (priv->bitcount > SGPIO_MAX_BITS) {
708 dev_err(dev, "Bit width exceeds maximum (%d)\n",
713 pctl_desc = &bank->pctl_desc;
714 pctl_desc->name = devm_kasprintf(dev, GFP_KERNEL, "%s-%sput",
716 bank->is_input ? "in" : "out");
717 pctl_desc->pctlops = &sgpio_pctl_ops;
718 pctl_desc->pmxops = &sgpio_pmx_ops;
719 pctl_desc->confops = &sgpio_confops;
720 pctl_desc->owner = THIS_MODULE;
722 pins = devm_kzalloc(dev, sizeof(*pins)*ngpios, GFP_KERNEL);
726 pctl_desc->npins = ngpios;
727 pctl_desc->pins = pins;
729 for (i = 0; i < ngpios; i++) {
730 struct sgpio_port_addr addr;
732 sgpio_pin_to_addr(priv, i, &addr);
735 pins[i].name = devm_kasprintf(dev, GFP_KERNEL,
737 bank->is_input ? 'I' : 'O',
738 addr.port, addr.bit);
743 pctldev = devm_pinctrl_register(dev, pctl_desc, bank);
745 return dev_err_probe(dev, PTR_ERR(pctldev), "Failed to register pinctrl\n");
748 gc->label = pctl_desc->name;
750 gc->of_node = to_of_node(fwnode);
751 gc->owner = THIS_MODULE;
752 gc->get_direction = microchip_sgpio_get_direction;
753 gc->direction_input = microchip_sgpio_direction_input;
754 gc->direction_output = microchip_sgpio_direction_output;
755 gc->get = microchip_sgpio_get_value;
756 gc->set = microchip_sgpio_set_value;
757 gc->request = gpiochip_generic_request;
758 gc->free = gpiochip_generic_free;
759 gc->of_xlate = microchip_sgpio_of_xlate;
760 gc->of_gpio_n_cells = 3;
764 if (bank->is_input && priv->properties->flags & SGPIO_FLAGS_HAS_IRQ) {
765 int irq = fwnode_irq_get(fwnode, 0);
768 struct gpio_irq_chip *girq = &gc->irq;
770 girq->chip = devm_kmemdup(dev, µchip_sgpio_irqchip,
771 sizeof(microchip_sgpio_irqchip),
775 girq->parent_handler = sgpio_irq_handler;
776 girq->num_parents = 1;
777 girq->parents = devm_kcalloc(dev, 1,
778 sizeof(*girq->parents),
782 girq->parents[0] = irq;
783 girq->default_type = IRQ_TYPE_NONE;
784 girq->handler = handle_bad_irq;
786 /* Disable all individual pins */
787 for (i = 0; i < SGPIO_MAX_BITS; i++)
788 sgpio_writel(priv, 0, REG_INT_ENABLE, i);
790 sgpio_clrsetbits(priv, REG_SIO_CONFIG, 0, 0, SGPIO_MASTER_INTR_ENA);
794 ret = devm_gpiochip_add_data(dev, gc, bank);
796 dev_err(dev, "Failed to register: ret %d\n", ret);
801 static int microchip_sgpio_probe(struct platform_device *pdev)
803 int div_clock = 0, ret, port, i, nbanks;
804 struct device *dev = &pdev->dev;
805 struct fwnode_handle *fwnode;
806 struct sgpio_priv *priv;
810 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
816 clk = devm_clk_get(dev, NULL);
818 return dev_err_probe(dev, PTR_ERR(clk), "Failed to get clock\n");
820 div_clock = clk_get_rate(clk);
821 if (device_property_read_u32(dev, "bus-frequency", &priv->clock))
822 priv->clock = 12500000;
823 if (priv->clock == 0 || priv->clock > (div_clock / 2)) {
824 dev_err(dev, "Invalid frequency %d\n", priv->clock);
828 priv->regs = devm_platform_ioremap_resource(pdev, 0);
829 if (IS_ERR(priv->regs))
830 return PTR_ERR(priv->regs);
831 priv->properties = device_get_match_data(dev);
832 priv->in.is_input = true;
834 /* Get rest of device properties */
835 ret = microchip_sgpio_get_ports(priv);
839 nbanks = device_get_child_node_count(dev);
841 dev_err(dev, "Must have 2 banks (have %d)\n", nbanks);
846 device_for_each_child_node(dev, fwnode) {
847 ret = microchip_sgpio_register_bank(dev, priv, fwnode, i++);
849 fwnode_handle_put(fwnode);
854 if (priv->in.gpio.ngpio != priv->out.gpio.ngpio) {
855 dev_err(dev, "Banks must have same GPIO count\n");
859 sgpio_configure_bitstream(priv);
861 val = max(2U, div_clock / priv->clock);
862 sgpio_configure_clock(priv, val);
864 for (port = 0; port < SGPIO_BITS_PER_WORD; port++)
865 sgpio_writel(priv, 0, REG_PORT_CONFIG, port);
866 sgpio_writel(priv, priv->ports, REG_PORT_ENABLE, 0);
871 static const struct of_device_id microchip_sgpio_gpio_of_match[] = {
873 .compatible = "microchip,sparx5-sgpio",
874 .data = &properties_sparx5,
876 .compatible = "mscc,luton-sgpio",
877 .data = &properties_luton,
879 .compatible = "mscc,ocelot-sgpio",
880 .data = &properties_ocelot,
886 static struct platform_driver microchip_sgpio_pinctrl_driver = {
888 .name = "pinctrl-microchip-sgpio",
889 .of_match_table = microchip_sgpio_gpio_of_match,
890 .suppress_bind_attrs = true,
892 .probe = microchip_sgpio_probe,
894 builtin_platform_driver(microchip_sgpio_pinctrl_driver);