3  * regmap based generic GPIO driver
8 #include <linux/gpio/driver.h>
9 #include <linux/gpio/regmap.h>
27 	int (*reg_mask_xlate)(struct gpio_regmap *gpio, unsigned int base,
42 static int gpio_regmap_simple_xlate(struct gpio_regmap *gpio,  in gpio_regmap_simple_xlate()  argument
46 	unsigned int line = offset % gpio->ngpio_per_reg;  in gpio_regmap_simple_xlate()
47 	unsigned int stride = offset / gpio->ngpio_per_reg;  in gpio_regmap_simple_xlate()
49 	*reg = base + stride * gpio->reg_stride;  in gpio_regmap_simple_xlate()
57 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_get()  local
62 	if (gpio->reg_dat_base)  in gpio_regmap_get()
63 		base = gpio_regmap_addr(gpio->reg_dat_base);  in gpio_regmap_get()
65 		base = gpio_regmap_addr(gpio->reg_set_base);  in gpio_regmap_get()
67 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_get()
71 	ret = regmap_read(gpio->regmap, reg, &val);  in gpio_regmap_get()
81 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_set()  local
82 	unsigned int base = gpio_regmap_addr(gpio->reg_set_base);  in gpio_regmap_set()
85 	gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_set()
87 		regmap_update_bits(gpio->regmap, reg, mask, mask);  in gpio_regmap_set()
89 		regmap_update_bits(gpio->regmap, reg, mask, 0);  in gpio_regmap_set()
95 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_set_with_clear()  local
99 		base = gpio_regmap_addr(gpio->reg_set_base);  in gpio_regmap_set_with_clear()
101 		base = gpio_regmap_addr(gpio->reg_clr_base);  in gpio_regmap_set_with_clear()
103 	gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_set_with_clear()
104 	regmap_write(gpio->regmap, reg, mask);  in gpio_regmap_set_with_clear()
110 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_get_direction()  local
114 	if (gpio->reg_dir_out_base) {  in gpio_regmap_get_direction()
115 		base = gpio_regmap_addr(gpio->reg_dir_out_base);  in gpio_regmap_get_direction()
117 	} else if (gpio->reg_dir_in_base) {  in gpio_regmap_get_direction()
118 		base = gpio_regmap_addr(gpio->reg_dir_in_base);  in gpio_regmap_get_direction()
124 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_get_direction()
128 	ret = regmap_read(gpio->regmap, reg, &val);  in gpio_regmap_get_direction()
141 	struct gpio_regmap *gpio = gpiochip_get_data(chip);  in gpio_regmap_set_direction()  local
145 	if (gpio->reg_dir_out_base) {  in gpio_regmap_set_direction()
146 		base = gpio_regmap_addr(gpio->reg_dir_out_base);  in gpio_regmap_set_direction()
148 	} else if (gpio->reg_dir_in_base) {  in gpio_regmap_set_direction()
149 		base = gpio_regmap_addr(gpio->reg_dir_in_base);  in gpio_regmap_set_direction()
155 	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);  in gpio_regmap_set_direction()
164 	return regmap_update_bits(gpio->regmap, reg, mask, val);  in gpio_regmap_set_direction()
181 void *gpio_regmap_get_drvdata(struct gpio_regmap *gpio)  in gpio_regmap_get_drvdata()  argument
183 	return gpio->driver_data;  in gpio_regmap_get_drvdata()
188  * gpio_regmap_register() - Register a generic regmap GPIO controller
195 	struct gpio_regmap *gpio;  in gpio_regmap_register()  local
218 	gpio = kzalloc(sizeof(*gpio), GFP_KERNEL);  in gpio_regmap_register()
219 	if (!gpio)  in gpio_regmap_register()
222 	gpio->parent = config->parent;  in gpio_regmap_register()
223 	gpio->driver_data = config->drvdata;  in gpio_regmap_register()
224 	gpio->regmap = config->regmap;  in gpio_regmap_register()
225 	gpio->ngpio_per_reg = config->ngpio_per_reg;  in gpio_regmap_register()
226 	gpio->reg_stride = config->reg_stride;  in gpio_regmap_register()
227 	gpio->reg_mask_xlate = config->reg_mask_xlate;  in gpio_regmap_register()
228 	gpio->reg_dat_base = config->reg_dat_base;  in gpio_regmap_register()
229 	gpio->reg_set_base = config->reg_set_base;  in gpio_regmap_register()
230 	gpio->reg_clr_base = config->reg_clr_base;  in gpio_regmap_register()
231 	gpio->reg_dir_in_base = config->reg_dir_in_base;  in gpio_regmap_register()
232 	gpio->reg_dir_out_base = config->reg_dir_out_base;  in gpio_regmap_register()
235 	if (!gpio->ngpio_per_reg)  in gpio_regmap_register()
236 		gpio->ngpio_per_reg = config->ngpio;  in gpio_regmap_register()
239 	if (!gpio->reg_stride)  in gpio_regmap_register()
240 		gpio->reg_stride = 1;  in gpio_regmap_register()
242 	if (!gpio->reg_mask_xlate)  in gpio_regmap_register()
243 		gpio->reg_mask_xlate = gpio_regmap_simple_xlate;  in gpio_regmap_register()
245 	chip = &gpio->gpio_chip;  in gpio_regmap_register()
263 	if (gpio->reg_set_base && gpio->reg_clr_base)  in gpio_regmap_register()
265 	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()
274 	ret = gpiochip_add_data(chip, gpio);  in gpio_regmap_register()
284 	return gpio;  in gpio_regmap_register()
289 	kfree(gpio);  in gpio_regmap_register()
295  * gpio_regmap_unregister() - Unregister a generic regmap GPIO controller
296  * @gpio: gpio_regmap device to unregister
298 void gpio_regmap_unregister(struct gpio_regmap *gpio)  in gpio_regmap_unregister()  argument
300 	gpiochip_remove(&gpio->gpio_chip);  in gpio_regmap_unregister()
301 	kfree(gpio);  in gpio_regmap_unregister()
312  * @dev: device that is registering this GPIO device
315  * Managed gpio_regmap_register(). For generic regmap GPIO device registered by
324 	struct gpio_regmap *gpio;  in devm_gpio_regmap_register()  local
327 	gpio = gpio_regmap_register(config);  in devm_gpio_regmap_register()
329 	if (IS_ERR(gpio))  in devm_gpio_regmap_register()
330 		return gpio;  in devm_gpio_regmap_register()
332 	ret = devm_add_action_or_reset(dev, devm_gpio_regmap_unregister, gpio);  in devm_gpio_regmap_register()
336 	return gpio;  in devm_gpio_regmap_register()
341 MODULE_DESCRIPTION("GPIO generic regmap driver core");