3  * regmap based generic GPIO driver
17 #include <linux/gpio/driver.h>
18 #include <linux/gpio/regmap.h>
41 	int (*reg_mask_xlate)(struct gpio_regmap *gpio, unsigned int base,
56 static int gpio_regmap_simple_xlate(struct gpio_regmap *gpio,  in gpio_regmap_simple_xlate()  argument
60 	unsigned int line = offset % gpio->ngpio_per_reg;  in gpio_regmap_simple_xlate()
61 	unsigned int stride = offset / gpio->ngpio_per_reg;  in gpio_regmap_simple_xlate()
63 	*reg = base + stride * gpio->reg_stride;  in gpio_regmap_simple_xlate()
71 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_get()  local
76 	if (gpio->reg_dat_base)  in gpio_regmap_get()
77 		base = gpio_regmap_addr(gpio->reg_dat_base);  in gpio_regmap_get()
79 		base = gpio_regmap_addr(gpio->reg_set_base);  in gpio_regmap_get()
81 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_get()
86 	if (gpio->reg_dat_base == gpio->reg_set_base)  in gpio_regmap_get()
87 		ret = regmap_read_bypassed(gpio->regmap, reg, &val);  in gpio_regmap_get()
89 		ret = regmap_read(gpio->regmap, reg, &val);  in gpio_regmap_get()
99 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_set()  local
100 	unsigned int base = gpio_regmap_addr(gpio->reg_set_base);  in gpio_regmap_set()
104 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_set()
114 	if (gpio->reg_dat_base == gpio->reg_set_base)  in gpio_regmap_set()
115 		ret = regmap_write_bits(gpio->regmap, reg, mask, mask_val);  in gpio_regmap_set()
117 		ret = regmap_update_bits(gpio->regmap, reg, mask, mask_val);  in gpio_regmap_set()
125 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_set_with_clear()  local
130 		base = gpio_regmap_addr(gpio->reg_set_base);  in gpio_regmap_set_with_clear()
132 		base = gpio_regmap_addr(gpio->reg_clr_base);  in gpio_regmap_set_with_clear()
134 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_set_with_clear()
138 	return regmap_write(gpio->regmap, reg, mask);  in gpio_regmap_set_with_clear()
144 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_get_direction()  local
148 	if (gpio->fixed_direction_output) {  in gpio_regmap_get_direction()
149 		if (test_bit(offset, gpio->fixed_direction_output))  in gpio_regmap_get_direction()
155 	if (gpio->reg_dat_base && !gpio->reg_set_base)  in gpio_regmap_get_direction()
157 	if (gpio->reg_set_base && !gpio->reg_dat_base)  in gpio_regmap_get_direction()
160 	if (gpio->reg_dir_out_base) {  in gpio_regmap_get_direction()
161 		base = gpio_regmap_addr(gpio->reg_dir_out_base);  in gpio_regmap_get_direction()
163 	} else if (gpio->reg_dir_in_base) {  in gpio_regmap_get_direction()
164 		base = gpio_regmap_addr(gpio->reg_dir_in_base);  in gpio_regmap_get_direction()
170 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_get_direction()
174 	ret = regmap_read(gpio->regmap, reg, &val);  in gpio_regmap_get_direction()
187 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_set_direction()  local
191 	if (gpio->reg_dir_out_base) {  in gpio_regmap_set_direction()
192 		base = gpio_regmap_addr(gpio->reg_dir_out_base);  in gpio_regmap_set_direction()
194 	} else if (gpio->reg_dir_in_base) {  in gpio_regmap_set_direction()
195 		base = gpio_regmap_addr(gpio->reg_dir_in_base);  in gpio_regmap_set_direction()
201 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_set_direction()
210 	return regmap_update_bits(gpio->regmap, reg, mask, val);  in gpio_regmap_set_direction()
227 void *gpio_regmap_get_drvdata(struct gpio_regmap *gpio)  in gpio_regmap_get_drvdata()  argument
229 	return gpio->driver_data;  in gpio_regmap_get_drvdata()
234  * gpio_regmap_register() - Register a generic regmap GPIO controller
242 	struct gpio_regmap *gpio;  in gpio_regmap_register()  local
262 	gpio = kzalloc_obj(*gpio);  in gpio_regmap_register()
263 	if (!gpio)  in gpio_regmap_register()
266 	gpio->parent = config->parent;  in gpio_regmap_register()
267 	gpio->driver_data = config->drvdata;  in gpio_regmap_register()
268 	gpio->regmap = config->regmap;  in gpio_regmap_register()
269 	gpio->reg_dat_base = config->reg_dat_base;  in gpio_regmap_register()
270 	gpio->reg_set_base = config->reg_set_base;  in gpio_regmap_register()
271 	gpio->reg_clr_base = config->reg_clr_base;  in gpio_regmap_register()
272 	gpio->reg_dir_in_base = config->reg_dir_in_base;  in gpio_regmap_register()
273 	gpio->reg_dir_out_base = config->reg_dir_out_base;  in gpio_regmap_register()
275 	chip = &gpio->gpio_chip;  in gpio_regmap_register()
287 	if (gpio->reg_set_base && gpio->reg_clr_base)  in gpio_regmap_register()
289 	else if (gpio->reg_set_base)  in gpio_regmap_register()
293 	if (gpio->reg_dir_in_base || gpio->reg_dir_out_base) {  in gpio_regmap_register()
306 		gpio->fixed_direction_output = bitmap_alloc(chip->ngpio,  in gpio_regmap_register()
308 		if (!gpio->fixed_direction_output) {  in gpio_regmap_register()
312 		bitmap_copy(gpio->fixed_direction_output,  in gpio_regmap_register()
317 	gpio->ngpio_per_reg = config->ngpio_per_reg;  in gpio_regmap_register()
318 	if (!gpio->ngpio_per_reg)  in gpio_regmap_register()
319 		gpio->ngpio_per_reg = config->ngpio;  in gpio_regmap_register()
322 	gpio->reg_stride = config->reg_stride;  in gpio_regmap_register()
323 	if (!gpio->reg_stride)  in gpio_regmap_register()
324 		gpio->reg_stride = 1;  in gpio_regmap_register()
326 	gpio->reg_mask_xlate = config->reg_mask_xlate;  in gpio_regmap_register()
327 	if (!gpio->reg_mask_xlate)  in gpio_regmap_register()
328 		gpio->reg_mask_xlate = gpio_regmap_simple_xlate;  in gpio_regmap_register()
330 	ret = gpiochip_add_data(chip, gpio);  in gpio_regmap_register()
336 		gpio->regmap_irq_line = config->regmap_irq_line;  in gpio_regmap_register()
339 						 0, config->regmap_irq_chip, &gpio->irq_chip_data);  in gpio_regmap_register()
343 		irq_domain = regmap_irq_get_domain(gpio->irq_chip_data);  in gpio_regmap_register()
354 	return gpio;  in gpio_regmap_register()
359 	bitmap_free(gpio->fixed_direction_output);  in gpio_regmap_register()
361 	kfree(gpio);  in gpio_regmap_register()
367  * gpio_regmap_unregister() - Unregister a generic regmap GPIO controller
368  * @gpio: gpio_regmap device to unregister
370 void gpio_regmap_unregister(struct gpio_regmap *gpio)  in gpio_regmap_unregister()  argument
373 	if (gpio->irq_chip_data)  in gpio_regmap_unregister()
374 		regmap_del_irq_chip(gpio->regmap_irq_line, gpio->irq_chip_data);  in gpio_regmap_unregister()
377 	gpiochip_remove(&gpio->gpio_chip);  in gpio_regmap_unregister()
378 	bitmap_free(gpio->fixed_direction_output);  in gpio_regmap_unregister()
379 	kfree(gpio);  in gpio_regmap_unregister()
390  * @dev: device that is registering this GPIO device
393  * Managed gpio_regmap_register(). For generic regmap GPIO device registered by
402 	struct gpio_regmap *gpio;  in devm_gpio_regmap_register()  local
405 	gpio = gpio_regmap_register(config);  in devm_gpio_regmap_register()
407 	if (IS_ERR(gpio))  in devm_gpio_regmap_register()
408 		return gpio;  in devm_gpio_regmap_register()
410 	ret = devm_add_action_or_reset(dev, devm_gpio_regmap_unregister, gpio);  in devm_gpio_regmap_register()
414 	return gpio;  in devm_gpio_regmap_register()
419 MODULE_DESCRIPTION("GPIO generic regmap driver core");