16 #include <linux/spi/flash.h>
41 static void mchp23k256_addr2cmd(struct mchp23k256_flash *flash,  in mchp23k256_addr2cmd()  argument
51 	for (i = flash->caps->addr_width; i > 0; i--, addr >>= 8)  in mchp23k256_addr2cmd()
55 static int mchp23k256_cmdsz(struct mchp23k256_flash *flash)  in mchp23k256_cmdsz()  argument
57 	return 1 + flash->caps->addr_width;  in mchp23k256_cmdsz()
63 	struct mchp23k256_flash *flash = to_mchp23k256_flash(mtd);  in mchp23k256_write()  local
71 	cmd_len = mchp23k256_cmdsz(flash);  in mchp23k256_write()
74 	mchp23k256_addr2cmd(flash, to, command);  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()
102 	struct mchp23k256_flash *flash = to_mchp23k256_flash(mtd);  in mchp23k256_read()  local
110 	cmd_len = mchp23k256_cmdsz(flash);  in mchp23k256_read()
114 	mchp23k256_addr2cmd(flash, from, command);  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()
173 	struct mchp23k256_flash *flash;  in mchp23k256_probe()  local
177 	flash = devm_kzalloc(&spi->dev, sizeof(*flash), GFP_KERNEL);  in mchp23k256_probe()
178 	if (!flash)  in mchp23k256_probe()
181 	flash->spi = spi;  in mchp23k256_probe()
182 	mutex_init(&flash->lock);  in mchp23k256_probe()
183 	spi_set_drvdata(spi, flash);  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()
214 	struct mchp23k256_flash *flash = spi_get_drvdata(spi);  in mchp23k256_remove()  local
216 	return mtd_device_unregister(&flash->mtd);  in mchp23k256_remove()