4  * SPDX-License-Identifier: Apache-2.0
19  * Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX7219-MAX7221.pdf
22  *  1. This driver only implements no-decode mode.
38 /* clang-format off */
59 /* clang-format on */
76 	const struct max7219_config *dev_config = dev->config;  in max7219_transmit_all()
77 	struct max7219_data *dev_data = dev->data;  in max7219_transmit_all()
80 		.buf = dev_data->tx_buf,  in max7219_transmit_all()
81 		.len = dev_config->num_cascading * 2,  in max7219_transmit_all()
85 		.count = 1U,  in max7219_transmit_all()
88 	for (int i = 0; i < dev_config->num_cascading; i++) {  in max7219_transmit_all()
89 		dev_data->tx_buf[i * 2] = addr;  in max7219_transmit_all()
90 		dev_data->tx_buf[i * 2 + 1] = value;  in max7219_transmit_all()
93 	return spi_write_dt(&dev_config->spi, &tx_bufs);  in max7219_transmit_all()
99 	const struct max7219_config *dev_config = dev->config;  in max7219_transmit_one()
100 	struct max7219_data *dev_data = dev->data;  in max7219_transmit_one()
103 		.buf = dev_data->tx_buf,  in max7219_transmit_one()
104 		.len = dev_config->num_cascading * 2,  in max7219_transmit_one()
108 		.count = 1U,  in max7219_transmit_one()
111 	for (int i = 0; i < dev_config->num_cascading; i++) {  in max7219_transmit_one()
112 		if (i != (dev_config->num_cascading - 1 - max7219_idx)) {  in max7219_transmit_one()
113 			dev_data->tx_buf[i * 2] = MAX7219_REG_NOOP;  in max7219_transmit_one()
114 			dev_data->tx_buf[i * 2 + 1] = MAX7219_NOOP;  in max7219_transmit_one()
118 		dev_data->tx_buf[i * 2] = addr;  in max7219_transmit_one()
119 		dev_data->tx_buf[i * 2 + 1] = value;  in max7219_transmit_one()
122 	return spi_write_dt(&dev_config->spi, &tx_bufs);  in max7219_transmit_one()
135 static inline void skip_pixel(uint8_t *mask, uint8_t *data, const uint8_t **buf, uint16_t count)  in skip_pixel()  argument
137 	while (count--) {  in skip_pixel()
145 	const struct max7219_config *dev_config = dev->config;  in max7219_write()
146 	struct max7219_data *dev_data = dev->data;  in max7219_write()
149 	const uint16_t max_height = dev_config->num_cascading * MAX7219_DIGITS_PER_DEVICE;  in max7219_write()
154 	__ASSERT((desc->pitch * desc->height) <= (desc->buf_size * 8U), "Input buffer to small");  in max7219_write()
155 	__ASSERT(desc->width <= desc->pitch, "Pitch is smaller then width");  in max7219_write()
156 	__ASSERT(desc->pitch <= max_width, "Pitch in descriptor is larger than screen size");  in max7219_write()
157 	__ASSERT(desc->height <= max_height, "Height in descriptor is larger than screen size");  in max7219_write()
158 	__ASSERT(x + desc->pitch <= max_width,  in max7219_write()
160 	__ASSERT(y + desc->height <= max_height,  in max7219_write()
163 	if (desc->width > desc->pitch || (desc->pitch * desc->height) > (desc->buf_size * 8U)) {  in max7219_write()
164 		return -EINVAL;  in max7219_write()
167 	if ((x + desc->pitch) > max_width || (y + desc->height) > max_height) {  in max7219_write()
168 		return -EINVAL;  in max7219_write()
171 	const uint16_t end_x = x + desc->width;  in max7219_write()
172 	const uint16_t end_y = y + desc->height;  in max7219_write()
174 	const uint16_t to_skip = desc->pitch - desc->width;  in max7219_write()
181 		uint8_t segment = dev_data->digit_buf[py];  in max7219_write()
196 		dev_data->digit_buf[y] = segment;  in max7219_write()
228 		return -ENOTSUP;  in max7219_set_pixel_format()
241 		return -ENOTSUP;  in max7219_set_orientation()
247 	const struct max7219_config *dev_config = dev->config;  in max7219_get_capabilities()
249 	caps->x_resolution = MAX7219_SEGMENTS_PER_DIGIT;  in max7219_get_capabilities()
250 	caps->y_resolution = MAX7219_DIGITS_PER_DEVICE * dev_config->num_cascading;  in max7219_get_capabilities()
251 	caps->supported_pixel_formats = PIXEL_FORMAT_MONO01;  in max7219_get_capabilities()
252 	caps->screen_info = 0;  in max7219_get_capabilities()
253 	caps->current_pixel_format = PIXEL_FORMAT_MONO01;  in max7219_get_capabilities()
254 	caps->current_orientation = DISPLAY_ORIENTATION_NORMAL;  in max7219_get_capabilities()
267 	const struct max7219_config *dev_config = dev->config;  in max7219_init()
268 	struct max7219_data *dev_data = dev->data;  in max7219_init()
271 	if (!spi_is_ready_dt(&dev_config->spi)) {  in max7219_init()
273 		return -ENODEV;  in max7219_init()
277 	memset(dev_data->digit_buf, 0,  in max7219_init()
278 	       dev_config->num_cascading * MAX7219_DIGITS_PER_DEVICE * sizeof(uint8_t));  in max7219_init()
292 	ret = max7219_transmit_all(dev, MAX7219_REG_INTENSITY, dev_config->intensity);  in max7219_init()
298 	ret = max7219_transmit_all(dev, MAX7219_REG_SCAN_LIMIT, dev_config->scan_limit);  in max7219_init()
311 		.buf_size = dev_config->num_cascading * MAX7219_DIGITS_PER_DEVICE,  in max7219_init()
312 		.height = dev_config->num_cascading * MAX7219_DIGITS_PER_DEVICE,  in max7219_init()
313 		.width = MAX7219_DIGITS_PER_DEVICE,  in max7219_init()
317 	ret = max7219_write(dev, 0, 0, &desc, dev_data->digit_buf);  in max7219_init()