4  * 2023 Amrith Venkat Kesavamoorthi <amrith@mr-beam.org>
7  * SPDX-License-Identifier: Apache-2.0
9  * @see https://www.nxp.com/docs/en/data-sheet/PCF8575.pdf
10  * @see https://www.nxp.com/docs/en/data-sheet/PCF8574_PCF8574A.pdf
64 	const struct pcf857x_drv_cfg *drv_cfg = dev->config;  in pcf857x_process_input()
65 	struct pcf857x_drv_data *drv_data = dev->data;  in pcf857x_process_input()
69 	rc = i2c_read_dt(&drv_cfg->i2c, rx_buf, drv_data->num_bytes);  in pcf857x_process_input()
71 		LOG_ERR("%s: failed to read from device: %d", dev->name, rc);  in pcf857x_process_input()
72 		return -EIO;  in pcf857x_process_input()
76 		*value = sys_get_le16(rx_buf); /*format P17-P10..P07-P00 (bit15-bit8..bit7-bit0)*/  in pcf857x_process_input()
79 	drv_data->input_port_last = sys_get_le16(rx_buf);  in pcf857x_process_input()
84 /** Register the read-task as work*/
89 	k_sem_take(&drv_data->lock, K_FOREVER);  in pcf857x_work_handler()
92 	uint16_t input_port_last_temp = drv_data->input_port_last;  in pcf857x_work_handler()
93 	int rc = pcf857x_process_input(drv_data->dev, &changed_pins);  in pcf857x_work_handler()
98 	k_sem_give(&drv_data->lock);  in pcf857x_work_handler()
103 		gpio_fire_callbacks(&drv_data->callbacks, drv_data->dev, changed_pins);  in pcf857x_work_handler()
117 	k_work_submit(&drv_data->work);  in pcf857x_int_gpio_handler()
123  * @param dev Pointer to the device structure of a port.
131 	struct pcf857x_drv_data *drv_data = dev->data;  in pcf857x_port_get_raw()
135 		return -EWOULDBLOCK;  in pcf857x_port_get_raw()
138 	if ((~drv_data->pins_cfg.configured_as_outputs & (uint16_t)*value) != (uint16_t)*value) {  in pcf857x_port_get_raw()
140 		return -EOPNOTSUPP;  in pcf857x_port_get_raw()
143 	k_sem_take(&drv_data->lock, K_FOREVER);  in pcf857x_port_get_raw()
146 	 * Reading of the input port also clears the generated interrupt,  in pcf857x_port_get_raw()
151 	k_sem_give(&drv_data->lock);  in pcf857x_port_get_raw()
160  * @param mask A mask of bits to set some bits to LOW or HIGH
170 	const struct pcf857x_drv_cfg *drv_cfg = dev->config;  in pcf857x_port_set_raw()
171 	struct pcf857x_drv_data *drv_data = dev->data;  in pcf857x_port_set_raw()
177 		return -EWOULDBLOCK;  in pcf857x_port_set_raw()
180 	if ((drv_data->pins_cfg.configured_as_outputs & value) != value) {  in pcf857x_port_set_raw()
182 		return -EOPNOTSUPP;  in pcf857x_port_set_raw()
185 	tx_buf = (drv_data->pins_cfg.outputs_state & ~mask);  in pcf857x_port_set_raw()
190 	rc = i2c_write_dt(&drv_cfg->i2c, tx_buf_p, drv_data->num_bytes);  in pcf857x_port_set_raw()
192 		LOG_ERR("%s: failed to write output port: %d", dev->name, rc);  in pcf857x_port_set_raw()
193 		return -EIO;  in pcf857x_port_set_raw()
195 	k_sem_take(&drv_data->lock, K_FOREVER);  in pcf857x_port_set_raw()
196 	drv_data->pins_cfg.outputs_state = tx_buf;  in pcf857x_port_set_raw()
197 	k_sem_give(&drv_data->lock);  in pcf857x_port_set_raw()
204  * You can use it to set some pins permanent to HIGH or LOW until reset. It uses the port_set_raw
208  * @param pin The bit in the io register which is set to high
216 	struct pcf857x_drv_data *drv_data = dev->data;  in pcf857x_pin_configure()
218 	uint16_t temp_pins = drv_data->pins_cfg.outputs_state;  in pcf857x_pin_configure()
219 	uint16_t temp_outputs = drv_data->pins_cfg.configured_as_outputs;  in pcf857x_pin_configure()
222 		return -ENOTSUP;  in pcf857x_pin_configure()
228 		drv_data->pins_cfg.configured_as_outputs |= BIT(pin);  in pcf857x_pin_configure()
229 		temp_outputs = drv_data->pins_cfg.configured_as_outputs;  in pcf857x_pin_configure()
238 	ret = pcf857x_port_set_raw(dev, drv_data->pins_cfg.configured_as_outputs, temp_pins, 0);  in pcf857x_pin_configure()
241 		k_sem_take(&drv_data->lock, K_FOREVER);  in pcf857x_pin_configure()
242 		drv_data->pins_cfg.outputs_state = temp_pins;  in pcf857x_pin_configure()
243 		drv_data->pins_cfg.configured_as_outputs = temp_outputs;  in pcf857x_pin_configure()
244 		k_sem_give(&drv_data->lock);  in pcf857x_pin_configure()
270  * @param pins The pin(s) which will be set in a range from P17-P10..P07-P00
312 	const struct pcf857x_drv_cfg *drv_cfg = dev->config;  in pcf857x_pin_interrupt_configure()
314 	if (!drv_cfg->gpio_int.port) {  in pcf857x_pin_interrupt_configure()
315 		return -ENOTSUP;  in pcf857x_pin_interrupt_configure()
318 	/* This device supports only edge-triggered interrupts. */  in pcf857x_pin_interrupt_configure()
320 		return -ENOTSUP;  in pcf857x_pin_interrupt_configure()
330 	struct pcf857x_drv_data *drv_data = dev->data;  in pcf857x_manage_callback()
332 	return gpio_manage_callback(&drv_data->callbacks, callback, set);  in pcf857x_manage_callback()
338 	const struct pcf857x_drv_cfg *drv_cfg = dev->config;  in pcf857x_init()
339 	struct pcf857x_drv_data *drv_data = dev->data;  in pcf857x_init()
342 	if (!device_is_ready(drv_cfg->i2c.bus)) {  in pcf857x_init()
343 		LOG_ERR("%s is not ready", drv_cfg->i2c.bus->name);  in pcf857x_init()
344 		return -ENODEV;  in pcf857x_init()
348 	if (drv_cfg->gpio_int.port) {  in pcf857x_init()
349 		if (!gpio_is_ready_dt(&drv_cfg->gpio_int)) {  in pcf857x_init()
350 			LOG_ERR("Port is not ready");  in pcf857x_init()
351 			return -ENODEV;  in pcf857x_init()
354 		rc = gpio_pin_configure_dt(&drv_cfg->gpio_int, GPIO_INPUT);  in pcf857x_init()
356 			LOG_ERR("%s: failed to configure INT line: %d", dev->name, rc);  in pcf857x_init()
357 			return -EIO;  in pcf857x_init()
360 		rc = gpio_pin_interrupt_configure_dt(&drv_cfg->gpio_int, GPIO_INT_EDGE_TO_ACTIVE);  in pcf857x_init()
362 			LOG_ERR("%s: failed to configure INT interrupt: %d", dev->name, rc);  in pcf857x_init()
363 			return -EIO;  in pcf857x_init()
366 		gpio_init_callback(&drv_data->int_gpio_cb, pcf857x_int_gpio_handler,  in pcf857x_init()
367 				   BIT(drv_cfg->gpio_int.pin));  in pcf857x_init()
368 		rc = gpio_add_callback(drv_cfg->gpio_int.port, &drv_data->int_gpio_cb);  in pcf857x_init()
370 			LOG_ERR("%s: failed to add INT callback: %d", dev->name, rc);  in pcf857x_init()
371 			return -EIO;  in pcf857x_init()