3  * regmap based generic GPIO driver
17 #include <linux/gpio/driver.h>
18 #include <linux/gpio/regmap.h>
35 	int (*reg_mask_xlate)(struct gpio_regmap *gpio, unsigned int base,
50 static int gpio_regmap_simple_xlate(struct gpio_regmap *gpio,  in gpio_regmap_simple_xlate()  argument
54 	unsigned int line = offset % gpio->ngpio_per_reg;  in gpio_regmap_simple_xlate()
55 	unsigned int stride = offset / gpio->ngpio_per_reg;  in gpio_regmap_simple_xlate()
57 	*reg = base + stride * gpio->reg_stride;  in gpio_regmap_simple_xlate()
65 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_get()  local
70 	if (gpio->reg_dat_base)  in gpio_regmap_get()
71 		base = gpio_regmap_addr(gpio->reg_dat_base);  in gpio_regmap_get()
73 		base = gpio_regmap_addr(gpio->reg_set_base);  in gpio_regmap_get()
75 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_get()
79 	ret = regmap_read(gpio->regmap, reg, &val);  in gpio_regmap_get()
89 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_set()  local
90 	unsigned int base = gpio_regmap_addr(gpio->reg_set_base);  in gpio_regmap_set()
94 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_set()
99 		ret = regmap_update_bits(gpio->regmap, reg, mask, mask);  in gpio_regmap_set()
101 		ret = regmap_update_bits(gpio->regmap, reg, mask, 0);  in gpio_regmap_set()
109 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_set_with_clear()  local
114 		base = gpio_regmap_addr(gpio->reg_set_base);  in gpio_regmap_set_with_clear()
116 		base = gpio_regmap_addr(gpio->reg_clr_base);  in gpio_regmap_set_with_clear()
118 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_set_with_clear()
122 	return regmap_write(gpio->regmap, reg, mask);  in gpio_regmap_set_with_clear()
128 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_get_direction()  local
132 	if (gpio->reg_dat_base && !gpio->reg_set_base)  in gpio_regmap_get_direction()
134 	if (gpio->reg_set_base && !gpio->reg_dat_base)  in gpio_regmap_get_direction()
137 	if (gpio->reg_dir_out_base) {  in gpio_regmap_get_direction()
138 		base = gpio_regmap_addr(gpio->reg_dir_out_base);  in gpio_regmap_get_direction()
140 	} else if (gpio->reg_dir_in_base) {  in gpio_regmap_get_direction()
141 		base = gpio_regmap_addr(gpio->reg_dir_in_base);  in gpio_regmap_get_direction()
147 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_get_direction()
151 	ret = regmap_read(gpio->regmap, reg, &val);  in gpio_regmap_get_direction()
164 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_set_direction()  local
168 	if (gpio->reg_dir_out_base) {  in gpio_regmap_set_direction()
169 		base = gpio_regmap_addr(gpio->reg_dir_out_base);  in gpio_regmap_set_direction()
171 	} else if (gpio->reg_dir_in_base) {  in gpio_regmap_set_direction()
172 		base = gpio_regmap_addr(gpio->reg_dir_in_base);  in gpio_regmap_set_direction()
178 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_set_direction()
187 	return regmap_update_bits(gpio->regmap, reg, mask, val);  in gpio_regmap_set_direction()
204 void *gpio_regmap_get_drvdata(struct gpio_regmap *gpio)  in gpio_regmap_get_drvdata()  argument
206 	return gpio->driver_data;  in gpio_regmap_get_drvdata()
211  * gpio_regmap_register() - Register a generic regmap GPIO controller
218 	struct gpio_regmap *gpio;  in gpio_regmap_register()  local
238 	gpio = kzalloc(sizeof(*gpio), GFP_KERNEL);  in gpio_regmap_register()
239 	if (!gpio)  in gpio_regmap_register()
242 	gpio->parent = config->parent;  in gpio_regmap_register()
243 	gpio->driver_data = config->drvdata;  in gpio_regmap_register()
244 	gpio->regmap = config->regmap;  in gpio_regmap_register()
245 	gpio->reg_dat_base = config->reg_dat_base;  in gpio_regmap_register()
246 	gpio->reg_set_base = config->reg_set_base;  in gpio_regmap_register()
247 	gpio->reg_clr_base = config->reg_clr_base;  in gpio_regmap_register()
248 	gpio->reg_dir_in_base = config->reg_dir_in_base;  in gpio_regmap_register()
249 	gpio->reg_dir_out_base = config->reg_dir_out_base;  in gpio_regmap_register()
251 	chip = &gpio->gpio_chip;  in gpio_regmap_register()
262 	if (gpio->reg_set_base && gpio->reg_clr_base)  in gpio_regmap_register()
264 	else if (gpio->reg_set_base)  in gpio_regmap_register()
268 	if (gpio->reg_dir_in_base || gpio->reg_dir_out_base) {  in gpio_regmap_register()
281 	gpio->ngpio_per_reg = config->ngpio_per_reg;  in gpio_regmap_register()
282 	if (!gpio->ngpio_per_reg)  in gpio_regmap_register()
283 		gpio->ngpio_per_reg = config->ngpio;  in gpio_regmap_register()
286 	gpio->reg_stride = config->reg_stride;  in gpio_regmap_register()
287 	if (!gpio->reg_stride)  in gpio_regmap_register()
288 		gpio->reg_stride = 1;  in gpio_regmap_register()
290 	gpio->reg_mask_xlate = config->reg_mask_xlate;  in gpio_regmap_register()
291 	if (!gpio->reg_mask_xlate)  in gpio_regmap_register()
292 		gpio->reg_mask_xlate = gpio_regmap_simple_xlate;  in gpio_regmap_register()
294 	ret = gpiochip_add_data(chip, gpio);  in gpio_regmap_register()
304 	return gpio;  in gpio_regmap_register()
309 	kfree(gpio);  in gpio_regmap_register()
315  * gpio_regmap_unregister() - Unregister a generic regmap GPIO controller
316  * @gpio: gpio_regmap device to unregister
318 void gpio_regmap_unregister(struct gpio_regmap *gpio)  in gpio_regmap_unregister()  argument
320 	gpiochip_remove(&gpio->gpio_chip);  in gpio_regmap_unregister()
321 	kfree(gpio);  in gpio_regmap_unregister()
332  * @dev: device that is registering this GPIO device
335  * Managed gpio_regmap_register(). For generic regmap GPIO device registered by
344 	struct gpio_regmap *gpio;  in devm_gpio_regmap_register()  local
347 	gpio = gpio_regmap_register(config);  in devm_gpio_regmap_register()
349 	if (IS_ERR(gpio))  in devm_gpio_regmap_register()
350 		return gpio;  in devm_gpio_regmap_register()
352 	ret = devm_add_action_or_reset(dev, devm_gpio_regmap_unregister, gpio);  in devm_gpio_regmap_register()
356 	return gpio;  in devm_gpio_regmap_register()
361 MODULE_DESCRIPTION("GPIO generic regmap driver core");