2  * SPI flash probing
8  * SPDX-License-Identifier:	GPL-2.0+
16 #include <spi.h>
22  * spi_flash_probe_slave() - Probe for a SPI flash device on a bus
24  * @flashp: Pointer to place to put flash info, which may be NULL if the
27 static int spi_flash_probe_slave(struct spi_flash *flash)  in spi_flash_probe_slave()  argument
29 	struct spi_slave *spi = flash->spi;  in spi_flash_probe_slave()  local
33 	if (!spi) {  in spi_flash_probe_slave()
35 		return -ENODEV;  in spi_flash_probe_slave()
38 	/* Claim spi bus */  in spi_flash_probe_slave()
39 	ret = spi_claim_bus(spi);  in spi_flash_probe_slave()
41 		debug("SF: Failed to claim SPI bus: %d\n", ret);  in spi_flash_probe_slave()
46 	flash->mtd.name = (char *)ofnode_read_string(spi->dev->node, "label");  in spi_flash_probe_slave()
49 	ret = spi_nor_scan(flash);  in spi_flash_probe_slave()
54 	ret = spi_flash_mtd_register(flash);  in spi_flash_probe_slave()
58 	spi_release_bus(spi);  in spi_flash_probe_slave()
67 	struct spi_flash *flash;  in spi_flash_probe()  local
73 	/* Allocate space if needed (not used by sf-uclass */  in spi_flash_probe()
74 	flash = calloc(1, sizeof(*flash));  in spi_flash_probe()
75 	if (!flash) {  in spi_flash_probe()
80 	flash->spi = bus;  in spi_flash_probe()
81 	if (spi_flash_probe_slave(flash)) {  in spi_flash_probe()
83 		free(flash);  in spi_flash_probe()
87 	return flash;  in spi_flash_probe()
90 void spi_flash_free(struct spi_flash *flash)  in spi_flash_free()  argument
95 	spi_free_slave(flash->spi);  in spi_flash_free()
96 	free(flash);  in spi_flash_free()
104 	struct spi_flash *flash = dev_get_uclass_priv(dev);  in spi_flash_std_read()  local
105 	struct mtd_info *mtd = &flash->mtd;  in spi_flash_std_read()
108 	return log_ret(mtd->_read(mtd, offset, len, &retlen, buf));  in spi_flash_std_read()
114 	struct spi_flash *flash = dev_get_uclass_priv(dev);  in spi_flash_std_write()  local
115 	struct mtd_info *mtd = &flash->mtd;  in spi_flash_std_write()
118 	return mtd->_write(mtd, offset, len, &retlen, buf);  in spi_flash_std_write()
123 	struct spi_flash *flash = dev_get_uclass_priv(dev);  in spi_flash_std_erase()  local
124 	struct mtd_info *mtd = &flash->mtd;  in spi_flash_std_erase()
127 	if (offset % mtd->erasesize || len % mtd->erasesize) {  in spi_flash_std_erase()
129 		return -EINVAL;  in spi_flash_std_erase()
136 	return mtd->_erase(mtd, &instr);  in spi_flash_std_erase()
141 	struct spi_flash *flash = dev_get_uclass_priv(dev);  in spi_flash_std_get_sw_write_prot()  local
143 	return spi_flash_cmd_get_sw_write_prot(flash);  in spi_flash_std_get_sw_write_prot()
165 	struct spi_flash *flash;  in spi_flash_std_probe()  local
167 	flash = dev_get_uclass_priv(dev);  in spi_flash_std_probe()
168 	flash->dev = dev;  in spi_flash_std_probe()
169 	flash->spi = slave;  in spi_flash_std_probe()
170 	debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs);  in spi_flash_std_probe()
171 	return spi_flash_probe_slave(flash);  in spi_flash_std_probe()
190 	{ .compatible = "jedec,spi-nor" },