1 // SPDX-License-Identifier: GPL-2.0-or-later
10  * - GPIO interrupt support
11  * - Pin pad configuration (pull up/down, strength)
23 #include <linux/pinctrl/pinconf-generic.h>
27 #include "pinctrl-utils.h"
29 #define DRIVER_NAME	"pinctrl-digicolor"
36 #define PIN_COLLECTIONS		('R' - 'A' + 1)
63 	return pmap->desc->pins[selector].name;  in dc_get_group_name()
72 	*pins = &pmap->desc->pins[selector].number;  in dc_get_group_pins()
109 	*groups = pmap->pin_names;  in dc_get_groups()
121 		*bit -= PINS_PER_COLLECTION;  in dc_client_sel()
135 	reg = readb_relaxed(pmap->regs + reg_off);  in dc_set_mux()
138 	writeb_relaxed(reg, pmap->regs + reg_off);  in dc_set_mux()
153 	reg = readb_relaxed(pmap->regs + reg_off);  in dc_pmx_request_gpio()
155 		return -EBUSY;  in dc_pmx_request_gpio()
173 	u8 drive;  in dc_gpio_direction_input()  local
176 	spin_lock_irqsave(&pmap->lock, flags);  in dc_gpio_direction_input()
177 	drive = readb_relaxed(pmap->regs + reg_off);  in dc_gpio_direction_input()
178 	drive &= ~BIT(bit_off);  in dc_gpio_direction_input()
179 	writeb_relaxed(drive, pmap->regs + reg_off);  in dc_gpio_direction_input()
180 	spin_unlock_irqrestore(&pmap->lock, flags);  in dc_gpio_direction_input()
193 	u8 drive;  in dc_gpio_direction_output()  local
198 	spin_lock_irqsave(&pmap->lock, flags);  in dc_gpio_direction_output()
199 	drive = readb_relaxed(pmap->regs + reg_off);  in dc_gpio_direction_output()
200 	drive |= BIT(bit_off);  in dc_gpio_direction_output()
201 	writeb_relaxed(drive, pmap->regs + reg_off);  in dc_gpio_direction_output()
202 	spin_unlock_irqrestore(&pmap->lock, flags);  in dc_gpio_direction_output()
214 	input = readb_relaxed(pmap->regs + reg_off);  in dc_gpio_get()
227 	spin_lock_irqsave(&pmap->lock, flags);  in dc_gpio_set()
228 	output = readb_relaxed(pmap->regs + reg_off);  in dc_gpio_set()
233 	writeb_relaxed(output, pmap->regs + reg_off);  in dc_gpio_set()
234 	spin_unlock_irqrestore(&pmap->lock, flags);  in dc_gpio_set()
239 	struct gpio_chip *chip = &pmap->chip;  in dc_gpiochip_add()
242 	chip->label		= DRIVER_NAME;  in dc_gpiochip_add()
243 	chip->parent		= pmap->dev;  in dc_gpiochip_add()
244 	chip->request		= gpiochip_generic_request;  in dc_gpiochip_add()
245 	chip->free		= gpiochip_generic_free;  in dc_gpiochip_add()
246 	chip->direction_input	= dc_gpio_direction_input;  in dc_gpiochip_add()
247 	chip->direction_output	= dc_gpio_direction_output;  in dc_gpiochip_add()
248 	chip->get		= dc_gpio_get;  in dc_gpiochip_add()
249 	chip->set		= dc_gpio_set;  in dc_gpiochip_add()
250 	chip->base		= -1;  in dc_gpiochip_add()
251 	chip->ngpio		= PINS_COUNT;  in dc_gpiochip_add()
253 	spin_lock_init(&pmap->lock);  in dc_gpiochip_add()
259 	ret = gpiochip_add_pin_range(chip, dev_name(pmap->dev), 0, 0,  in dc_gpiochip_add()
276 	int i, j;  in dc_pinctrl_probe()  local
278 	pmap = devm_kzalloc(&pdev->dev, sizeof(*pmap), GFP_KERNEL);  in dc_pinctrl_probe()
280 		return -ENOMEM;  in dc_pinctrl_probe()
282 	pmap->regs = devm_platform_ioremap_resource(pdev, 0);  in dc_pinctrl_probe()
283 	if (IS_ERR(pmap->regs))  in dc_pinctrl_probe()
284 		return PTR_ERR(pmap->regs);  in dc_pinctrl_probe()
286 	pins = devm_kcalloc(&pdev->dev, PINS_COUNT, sizeof(*pins),  in dc_pinctrl_probe()
289 		return -ENOMEM;  in dc_pinctrl_probe()
290 	pin_names = devm_kcalloc(&pdev->dev, PINS_COUNT, name_len,  in dc_pinctrl_probe()
293 		return -ENOMEM;  in dc_pinctrl_probe()
295 	for (i = 0; i < PIN_COLLECTIONS; i++) {  in dc_pinctrl_probe()
297 			int pin_id = i*PINS_PER_COLLECTION + j;  in dc_pinctrl_probe()
300 			snprintf(name, name_len, "GP_%c%c", 'A'+i, '0'+j);  in dc_pinctrl_probe()
304 			pmap->pin_names[pin_id] = name;  in dc_pinctrl_probe()
308 	pctl_desc = devm_kzalloc(&pdev->dev, sizeof(*pctl_desc), GFP_KERNEL);  in dc_pinctrl_probe()
310 		return -ENOMEM;  in dc_pinctrl_probe()
312 	pctl_desc->name	= DRIVER_NAME,  in dc_pinctrl_probe()
313 	pctl_desc->owner = THIS_MODULE,  in dc_pinctrl_probe()
314 	pctl_desc->pctlops = &dc_pinctrl_ops,  in dc_pinctrl_probe()
315 	pctl_desc->pmxops = &dc_pmxops,  in dc_pinctrl_probe()
316 	pctl_desc->npins = PINS_COUNT;  in dc_pinctrl_probe()
317 	pctl_desc->pins = pins;  in dc_pinctrl_probe()
318 	pmap->desc = pctl_desc;  in dc_pinctrl_probe()
320 	pmap->dev = &pdev->dev;  in dc_pinctrl_probe()
322 	pmap->pctl = devm_pinctrl_register(&pdev->dev, pctl_desc, pmap);  in dc_pinctrl_probe()
323 	if (IS_ERR(pmap->pctl)) {  in dc_pinctrl_probe()
324 		dev_err(&pdev->dev, "pinctrl driver registration failed\n");  in dc_pinctrl_probe()
325 		return PTR_ERR(pmap->pctl);  in dc_pinctrl_probe()
332 	{ .compatible = "cnxt,cx92755-pinctrl" },