1 // SPDX-License-Identifier: GPL-2.0-only
51 	for (i = flash->caps->addr_width; i > 0; i--, addr >>= 8)  in mchp23k256_addr2cmd()
57 	return 1 + flash->caps->addr_width;  in mchp23k256_cmdsz()
64 	struct spi_transfer transfer[2] = {};  in mchp23k256_write()  local
76 	transfer[0].tx_buf = command;  in mchp23k256_write()
77 	transfer[0].len = cmd_len;  in mchp23k256_write()
78 	spi_message_add_tail(&transfer[0], &message);  in mchp23k256_write()
80 	transfer[1].tx_buf = buf;  in mchp23k256_write()
81 	transfer[1].len = len;  in mchp23k256_write()
82 	spi_message_add_tail(&transfer[1], &message);  in mchp23k256_write()
84 	mutex_lock(&flash->lock);  in mchp23k256_write()
86 	ret = spi_sync(flash->spi, &message);  in mchp23k256_write()
88 	mutex_unlock(&flash->lock);  in mchp23k256_write()
94 		*retlen += message.actual_length - cmd_len;  in mchp23k256_write()
103 	struct spi_transfer transfer[2] = {};  in mchp23k256_read()  local
112 	memset(&transfer, 0, sizeof(transfer));  in mchp23k256_read()
116 	transfer[0].tx_buf = command;  in mchp23k256_read()
117 	transfer[0].len = cmd_len;  in mchp23k256_read()
118 	spi_message_add_tail(&transfer[0], &message);  in mchp23k256_read()
120 	transfer[1].rx_buf = buf;  in mchp23k256_read()
121 	transfer[1].len = len;  in mchp23k256_read()
122 	spi_message_add_tail(&transfer[1], &message);  in mchp23k256_read()
124 	mutex_lock(&flash->lock);  in mchp23k256_read()
126 	ret = spi_sync(flash->spi, &message);  in mchp23k256_read()
128 	mutex_unlock(&flash->lock);  in mchp23k256_read()
134 		*retlen += message.actual_length - cmd_len;  in mchp23k256_read()
145 	struct spi_transfer transfer = {};  in mchp23k256_set_mode()  local
154 	transfer.tx_buf = command;  in mchp23k256_set_mode()
155 	transfer.len = sizeof(command);  in mchp23k256_set_mode()
156 	spi_message_add_tail(&transfer, &message);  in mchp23k256_set_mode()
174 	struct flash_platform_data *data;  in mchp23k256_probe()  local
177 	flash = devm_kzalloc(&spi->dev, sizeof(*flash), GFP_KERNEL);  in mchp23k256_probe()
179 		return -ENOMEM;  in mchp23k256_probe()
181 	flash->spi = spi;  in mchp23k256_probe()
182 	mutex_init(&flash->lock);  in mchp23k256_probe()
189 	data = dev_get_platdata(&spi->dev);  in mchp23k256_probe()
191 	flash->caps = of_device_get_match_data(&spi->dev);  in mchp23k256_probe()
192 	if (!flash->caps)  in mchp23k256_probe()
193 		flash->caps = &mchp23k256_caps;  in mchp23k256_probe()
195 	mtd_set_of_node(&flash->mtd, spi->dev.of_node);  in mchp23k256_probe()
196 	flash->mtd.dev.parent	= &spi->dev;  in mchp23k256_probe()
197 	flash->mtd.type		= MTD_RAM;  in mchp23k256_probe()
198 	flash->mtd.flags	= MTD_CAP_RAM;  in mchp23k256_probe()
199 	flash->mtd.writesize	= 1;  in mchp23k256_probe()
200 	flash->mtd.size		= flash->caps->size;  in mchp23k256_probe()
201 	flash->mtd._read	= mchp23k256_read;  in mchp23k256_probe()
202 	flash->mtd._write	= mchp23k256_write;  in mchp23k256_probe()
204 	err = mtd_device_register(&flash->mtd, data ? data->parts : NULL,  in mchp23k256_probe()
205 				  data ? data->nr_parts : 0);  in mchp23k256_probe()
216 	WARN_ON(mtd_device_unregister(&flash->mtd));  in mchp23k256_remove()
222 		.data = &mchp23k256_caps,
226 		.data = &mchp23lcv1024_caps,