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mtd: spi-nor: stop (ab)using struct spi_device_id
Using struct spi_device_id for storing list of flash devices comes from
early SPI NOR framework days. Thanks to the commit 70f3ce0510 ("mtd:
spi-nor: make spi_nor_scan() take a chip type name, not spi_device_id")
we can stop using spi_device_id and just switch to our own struct.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Rafał Miłecki
Brian Norris
parent
0cb8504860
commit
06bb6f5a69
@ -29,6 +29,8 @@
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#define SPI_NOR_MAX_ID_LEN 6
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struct flash_info {
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char *name;
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/*
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* This array stores the ID bytes.
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* The first three bytes are the JEDIC ID.
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@ -59,7 +61,7 @@ struct flash_info {
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#define JEDEC_MFR(info) ((info)->id[0])
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static const struct spi_device_id *spi_nor_match_id(const char *name);
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static const struct flash_info *spi_nor_match_id(const char *name);
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/*
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* Read the status register, returning its value in the location
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@ -169,7 +171,7 @@ static inline struct spi_nor *mtd_to_spi_nor(struct mtd_info *mtd)
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}
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/* Enable/disable 4-byte addressing mode. */
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static inline int set_4byte(struct spi_nor *nor, struct flash_info *info,
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static inline int set_4byte(struct spi_nor *nor, const struct flash_info *info,
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int enable)
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{
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int status;
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@ -469,7 +471,6 @@ static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
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/* Used when the "_ext_id" is two bytes at most */
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#define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
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((kernel_ulong_t)&(struct flash_info) { \
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.id = { \
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((_jedec_id) >> 16) & 0xff, \
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((_jedec_id) >> 8) & 0xff, \
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@ -481,11 +482,9 @@ static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
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.sector_size = (_sector_size), \
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.n_sectors = (_n_sectors), \
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.page_size = 256, \
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.flags = (_flags), \
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})
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.flags = (_flags),
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#define INFO6(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
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((kernel_ulong_t)&(struct flash_info) { \
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.id = { \
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((_jedec_id) >> 16) & 0xff, \
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((_jedec_id) >> 8) & 0xff, \
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@ -498,17 +497,14 @@ static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
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.sector_size = (_sector_size), \
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.n_sectors = (_n_sectors), \
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.page_size = 256, \
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.flags = (_flags), \
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})
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.flags = (_flags),
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#define CAT25_INFO(_sector_size, _n_sectors, _page_size, _addr_width, _flags) \
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((kernel_ulong_t)&(struct flash_info) { \
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.sector_size = (_sector_size), \
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.n_sectors = (_n_sectors), \
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.page_size = (_page_size), \
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.addr_width = (_addr_width), \
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.flags = (_flags), \
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})
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.flags = (_flags),
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/* NOTE: double check command sets and memory organization when you add
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* more nor chips. This current list focusses on newer chips, which
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@ -521,7 +517,7 @@ static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
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* For historical (and compatibility) reasons (before we got above config) some
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* old entries may be missing 4K flag.
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*/
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static const struct spi_device_id spi_nor_ids[] = {
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static const struct flash_info spi_nor_ids[] = {
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/* Atmel -- some are (confusingly) marketed as "DataFlash" */
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{ "at25fs010", INFO(0x1f6601, 0, 32 * 1024, 4, SECT_4K) },
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{ "at25fs040", INFO(0x1f6604, 0, 64 * 1024, 8, SECT_4K) },
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@ -703,11 +699,11 @@ static const struct spi_device_id spi_nor_ids[] = {
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{ },
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};
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static const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor)
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static const struct flash_info *spi_nor_read_id(struct spi_nor *nor)
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{
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int tmp;
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u8 id[SPI_NOR_MAX_ID_LEN];
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struct flash_info *info;
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const struct flash_info *info;
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tmp = nor->read_reg(nor, SPINOR_OP_RDID, id, SPI_NOR_MAX_ID_LEN);
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if (tmp < 0) {
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@ -716,7 +712,7 @@ static const struct spi_device_id *spi_nor_read_id(struct spi_nor *nor)
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}
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for (tmp = 0; tmp < ARRAY_SIZE(spi_nor_ids) - 1; tmp++) {
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info = (void *)spi_nor_ids[tmp].driver_data;
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info = &spi_nor_ids[tmp];
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if (info->id_len) {
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if (!memcmp(info->id, id, info->id_len))
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return &spi_nor_ids[tmp];
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@ -962,7 +958,7 @@ static int micron_quad_enable(struct spi_nor *nor)
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return 0;
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}
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static int set_quad_mode(struct spi_nor *nor, struct flash_info *info)
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static int set_quad_mode(struct spi_nor *nor, const struct flash_info *info)
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{
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int status;
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@ -1004,8 +1000,7 @@ static int spi_nor_check(struct spi_nor *nor)
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int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
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{
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const struct spi_device_id *id = NULL;
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struct flash_info *info;
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const struct flash_info *info = NULL;
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struct device *dev = nor->dev;
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struct mtd_info *mtd = nor->mtd;
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struct device_node *np = dev->of_node;
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@ -1017,26 +1012,24 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
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return ret;
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if (name)
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id = spi_nor_match_id(name);
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info = spi_nor_match_id(name);
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/* Try to auto-detect if chip name wasn't specified or not found */
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if (!id)
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id = spi_nor_read_id(nor);
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if (IS_ERR_OR_NULL(id))
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if (!info)
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info = spi_nor_read_id(nor);
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if (IS_ERR_OR_NULL(info))
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return -ENOENT;
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info = (void *)id->driver_data;
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/*
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* If caller has specified name of flash model that can normally be
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* detected using JEDEC, let's verify it.
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*/
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if (name && info->id_len) {
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const struct spi_device_id *jid;
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const struct flash_info *jinfo;
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jid = spi_nor_read_id(nor);
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if (IS_ERR(jid)) {
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return PTR_ERR(jid);
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} else if (jid != id) {
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jinfo = spi_nor_read_id(nor);
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if (IS_ERR(jinfo)) {
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return PTR_ERR(jinfo);
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} else if (jinfo != info) {
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/*
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* JEDEC knows better, so overwrite platform ID. We
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* can't trust partitions any longer, but we'll let
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@ -1045,9 +1038,8 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
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* information, even if it's not 100% accurate.
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*/
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dev_warn(dev, "found %s, expected %s\n",
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jid->name, id->name);
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id = jid;
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info = (void *)jid->driver_data;
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jinfo->name, info->name);
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info = jinfo;
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}
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}
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@ -1197,7 +1189,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
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nor->read_dummy = spi_nor_read_dummy_cycles(nor);
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dev_info(dev, "%s (%lld Kbytes)\n", id->name,
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dev_info(dev, "%s (%lld Kbytes)\n", info->name,
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(long long)mtd->size >> 10);
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dev_dbg(dev,
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@ -1220,9 +1212,9 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
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}
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EXPORT_SYMBOL_GPL(spi_nor_scan);
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static const struct spi_device_id *spi_nor_match_id(const char *name)
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static const struct flash_info *spi_nor_match_id(const char *name)
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{
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const struct spi_device_id *id = spi_nor_ids;
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const struct flash_info *id = spi_nor_ids;
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while (id->name[0]) {
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if (!strcmp(name, id->name))
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