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authorMiquel Raynal <miquel.raynal@bootlin.com>2021-06-30 13:52:24 +0300
committerMiquel Raynal <miquel.raynal@bootlin.com>2021-06-30 13:52:24 +0300
commit0bcc3939c98d83955397eac1584d5f791fdc88d0 (patch)
tree21e6be9c578916ca86ffe0f88a9d807435318964 /drivers/mtd
parent600d050944e133fde1f54b9113b01ccefbd82820 (diff)
parentc17e5c85b32f8809135f3211ba2525fb98b5c09f (diff)
downloadlinux-0bcc3939c98d83955397eac1584d5f791fdc88d0.tar.xz
Merge tag 'spi-nor/for-5.14' into mtd/next
SPI NOR core changes: - Ability to dump SFDP tables via sysfs - Support for erasing OTP regions on Winbond and similar flashes - Few API doc updates and fixes - Locking support for MX25L12805D SPI NOR controller drivers changes: - Use SPI_MODE_X_MASK in nxp-spifi - Intel Alder Lake-M SPI serial flash support
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/spi-nor/Makefile2
-rw-r--r--drivers/mtd/spi-nor/controllers/intel-spi-pci.c1
-rw-r--r--drivers/mtd/spi-nor/controllers/nxp-spifi.c2
-rw-r--r--drivers/mtd/spi-nor/core.c22
-rw-r--r--drivers/mtd/spi-nor/core.h16
-rw-r--r--drivers/mtd/spi-nor/macronix.c5
-rw-r--r--drivers/mtd/spi-nor/otp.c160
-rw-r--r--drivers/mtd/spi-nor/sfdp.c58
-rw-r--r--drivers/mtd/spi-nor/sysfs.c93
-rw-r--r--drivers/mtd/spi-nor/winbond.c1
10 files changed, 337 insertions, 23 deletions
diff --git a/drivers/mtd/spi-nor/Makefile b/drivers/mtd/spi-nor/Makefile
index 136f245c91dc..6b904e439372 100644
--- a/drivers/mtd/spi-nor/Makefile
+++ b/drivers/mtd/spi-nor/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
-spi-nor-objs := core.o sfdp.o swp.o otp.o
+spi-nor-objs := core.o sfdp.o swp.o otp.o sysfs.o
spi-nor-objs += atmel.o
spi-nor-objs += catalyst.o
spi-nor-objs += eon.o
diff --git a/drivers/mtd/spi-nor/controllers/intel-spi-pci.c b/drivers/mtd/spi-nor/controllers/intel-spi-pci.c
index 825610a2e9dc..1bc53b8bb88a 100644
--- a/drivers/mtd/spi-nor/controllers/intel-spi-pci.c
+++ b/drivers/mtd/spi-nor/controllers/intel-spi-pci.c
@@ -74,6 +74,7 @@ static const struct pci_device_id intel_spi_pci_ids[] = {
{ PCI_VDEVICE(INTEL, 0x4b24), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0x4da4), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0x51a4), (unsigned long)&cnl_info },
+ { PCI_VDEVICE(INTEL, 0x54a4), (unsigned long)&cnl_info },
{ PCI_VDEVICE(INTEL, 0x7aa4), (unsigned long)&cnl_info },
{ PCI_VDEVICE(INTEL, 0xa0a4), (unsigned long)&bxt_info },
{ PCI_VDEVICE(INTEL, 0xa1a4), (unsigned long)&bxt_info },
diff --git a/drivers/mtd/spi-nor/controllers/nxp-spifi.c b/drivers/mtd/spi-nor/controllers/nxp-spifi.c
index 5703e8313980..2635c80231bb 100644
--- a/drivers/mtd/spi-nor/controllers/nxp-spifi.c
+++ b/drivers/mtd/spi-nor/controllers/nxp-spifi.c
@@ -326,7 +326,7 @@ static int nxp_spifi_setup_flash(struct nxp_spifi *spifi,
ctrl |= SPIFI_CTRL_DUAL;
}
- switch (mode & (SPI_CPHA | SPI_CPOL)) {
+ switch (mode & SPI_MODE_X_MASK) {
case SPI_MODE_0:
ctrl &= ~SPIFI_CTRL_MODE3;
break;
diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index bd2c7717eb10..cc08bd707378 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -1318,7 +1318,7 @@ static u32 spi_nor_convert_addr(struct spi_nor *nor, loff_t addr)
/*
* Initiate the erasure of a single sector
*/
-static int spi_nor_erase_sector(struct spi_nor *nor, u32 addr)
+int spi_nor_erase_sector(struct spi_nor *nor, u32 addr)
{
int i;
@@ -1411,9 +1411,7 @@ spi_nor_find_best_erase_type(const struct spi_nor_erase_map *map,
continue;
spi_nor_div_by_erase_size(erase, addr, &rem);
- if (rem)
- continue;
- else
+ if (!rem)
return erase;
}
@@ -2839,6 +2837,21 @@ static int spi_nor_init(struct spi_nor *nor)
return 0;
}
+/**
+ * spi_nor_soft_reset() - Perform a software reset
+ * @nor: pointer to 'struct spi_nor'
+ *
+ * Performs a "Soft Reset and Enter Default Protocol Mode" sequence which resets
+ * the device to its power-on-reset state. This is useful when the software has
+ * made some changes to device (volatile) registers and needs to reset it before
+ * shutting down, for example.
+ *
+ * Not every flash supports this sequence. The same set of opcodes might be used
+ * for some other operation on a flash that does not support this. Support for
+ * this sequence can be discovered via SFDP in the BFPT table.
+ *
+ * Return: 0 on success, -errno otherwise.
+ */
static void spi_nor_soft_reset(struct spi_nor *nor)
{
struct spi_mem_op op;
@@ -3444,6 +3457,7 @@ static struct spi_mem_driver spi_nor_driver = {
.driver = {
.name = "spi-nor",
.of_match_table = spi_nor_of_table,
+ .dev_groups = spi_nor_sysfs_groups,
},
.id_table = spi_nor_dev_ids,
},
diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index 28a2e0be97a3..3348e1dd1445 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -207,6 +207,7 @@ struct spi_nor_otp_organization {
* @read: read from the SPI NOR OTP area.
* @write: write to the SPI NOR OTP area.
* @lock: lock an OTP region.
+ * @erase: erase an OTP region.
* @is_locked: check if an OTP region of the SPI NOR is locked.
*/
struct spi_nor_otp_ops {
@@ -214,6 +215,7 @@ struct spi_nor_otp_ops {
int (*write)(struct spi_nor *nor, loff_t addr, size_t len,
const u8 *buf);
int (*lock)(struct spi_nor *nor, unsigned int region);
+ int (*erase)(struct spi_nor *nor, loff_t addr);
int (*is_locked)(struct spi_nor *nor, unsigned int region);
};
@@ -459,6 +461,16 @@ struct spi_nor_manufacturer {
const struct spi_nor_fixups *fixups;
};
+/**
+ * struct sfdp - SFDP data
+ * @num_dwords: number of entries in the dwords array
+ * @dwords: array of double words of the SFDP data
+ */
+struct sfdp {
+ size_t num_dwords;
+ u32 *dwords;
+};
+
/* Manufacturer drivers. */
extern const struct spi_nor_manufacturer spi_nor_atmel;
extern const struct spi_nor_manufacturer spi_nor_catalyst;
@@ -478,6 +490,8 @@ extern const struct spi_nor_manufacturer spi_nor_winbond;
extern const struct spi_nor_manufacturer spi_nor_xilinx;
extern const struct spi_nor_manufacturer spi_nor_xmc;
+extern const struct attribute_group *spi_nor_sysfs_groups[];
+
void spi_nor_spimem_setup_op(const struct spi_nor *nor,
struct spi_mem_op *op,
const enum spi_nor_protocol proto);
@@ -503,10 +517,12 @@ ssize_t spi_nor_read_data(struct spi_nor *nor, loff_t from, size_t len,
u8 *buf);
ssize_t spi_nor_write_data(struct spi_nor *nor, loff_t to, size_t len,
const u8 *buf);
+int spi_nor_erase_sector(struct spi_nor *nor, u32 addr);
int spi_nor_otp_read_secr(struct spi_nor *nor, loff_t addr, size_t len, u8 *buf);
int spi_nor_otp_write_secr(struct spi_nor *nor, loff_t addr, size_t len,
const u8 *buf);
+int spi_nor_otp_erase_secr(struct spi_nor *nor, loff_t addr);
int spi_nor_otp_lock_sr2(struct spi_nor *nor, unsigned int region);
int spi_nor_otp_is_locked_sr2(struct spi_nor *nor, unsigned int region);
diff --git a/drivers/mtd/spi-nor/macronix.c b/drivers/mtd/spi-nor/macronix.c
index 42c2cf31702e..27498ed0cc0d 100644
--- a/drivers/mtd/spi-nor/macronix.c
+++ b/drivers/mtd/spi-nor/macronix.c
@@ -49,7 +49,8 @@ static const struct flash_info macronix_parts[] = {
{ "mx25u4035", INFO(0xc22533, 0, 64 * 1024, 8, SECT_4K) },
{ "mx25u8035", INFO(0xc22534, 0, 64 * 1024, 16, SECT_4K) },
{ "mx25u6435f", INFO(0xc22537, 0, 64 * 1024, 128, SECT_4K) },
- { "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, SECT_4K) },
+ { "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, SECT_4K |
+ SPI_NOR_HAS_LOCK | SPI_NOR_4BIT_BP) },
{ "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
{ "mx25r1635f", INFO(0xc22815, 0, 64 * 1024, 32,
SECT_4K | SPI_NOR_DUAL_READ |
@@ -72,7 +73,7 @@ static const struct flash_info macronix_parts[] = {
SECT_4K | SPI_NOR_DUAL_READ |
SPI_NOR_QUAD_READ) },
{ "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
- { "mx66l51235l", INFO(0xc2201a, 0, 64 * 1024, 1024,
+ { "mx66l51235f", INFO(0xc2201a, 0, 64 * 1024, 1024,
SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
SPI_NOR_4B_OPCODES) },
{ "mx66u51235f", INFO(0xc2253a, 0, 64 * 1024, 1024,
diff --git a/drivers/mtd/spi-nor/otp.c b/drivers/mtd/spi-nor/otp.c
index fcf38d260345..983e40b19134 100644
--- a/drivers/mtd/spi-nor/otp.c
+++ b/drivers/mtd/spi-nor/otp.c
@@ -15,14 +15,21 @@
#define spi_nor_otp_n_regions(nor) ((nor)->params->otp.org->n_regions)
/**
- * spi_nor_otp_read_secr() - read OTP data
+ * spi_nor_otp_read_secr() - read security register
* @nor: pointer to 'struct spi_nor'
- * @from: offset to read from
+ * @addr: offset to read from
* @len: number of bytes to read
* @buf: pointer to dst buffer
*
- * Read OTP data from one region by using the SPINOR_OP_RSECR commands. This
- * method is used on GigaDevice and Winbond flashes.
+ * Read a security register by using the SPINOR_OP_RSECR commands.
+ *
+ * In Winbond/GigaDevice datasheets the term "security register" stands for
+ * an one-time-programmable memory area, consisting of multiple bytes (usually
+ * 256). Thus one "security register" maps to one OTP region.
+ *
+ * This method is used on GigaDevice and Winbond flashes.
+ *
+ * Please note, the read must not span multiple registers.
*
* Return: number of bytes read successfully, -errno otherwise
*/
@@ -40,7 +47,6 @@ int spi_nor_otp_read_secr(struct spi_nor *nor, loff_t addr, size_t len, u8 *buf)
rdesc = nor->dirmap.rdesc;
nor->read_opcode = SPINOR_OP_RSECR;
- nor->addr_width = 3;
nor->read_dummy = 8;
nor->read_proto = SNOR_PROTO_1_1_1;
nor->dirmap.rdesc = NULL;
@@ -57,16 +63,20 @@ int spi_nor_otp_read_secr(struct spi_nor *nor, loff_t addr, size_t len, u8 *buf)
}
/**
- * spi_nor_otp_write_secr() - write OTP data
+ * spi_nor_otp_write_secr() - write security register
* @nor: pointer to 'struct spi_nor'
- * @to: offset to write to
+ * @addr: offset to write to
* @len: number of bytes to write
* @buf: pointer to src buffer
*
- * Write OTP data to one region by using the SPINOR_OP_PSECR commands. This
- * method is used on GigaDevice and Winbond flashes.
+ * Write a security register by using the SPINOR_OP_PSECR commands.
+ *
+ * For more information on the term "security register", see the documentation
+ * of spi_nor_otp_read_secr().
*
- * Please note, the write must not span multiple OTP regions.
+ * This method is used on GigaDevice and Winbond flashes.
+ *
+ * Please note, the write must not span multiple registers.
*
* Return: number of bytes written successfully, -errno otherwise
*/
@@ -84,13 +94,12 @@ int spi_nor_otp_write_secr(struct spi_nor *nor, loff_t addr, size_t len,
wdesc = nor->dirmap.wdesc;
nor->program_opcode = SPINOR_OP_PSECR;
- nor->addr_width = 3;
nor->write_proto = SNOR_PROTO_1_1_1;
nor->dirmap.wdesc = NULL;
/*
* We only support a write to one single page. For now all winbond
- * flashes only have one page per OTP region.
+ * flashes only have one page per security register.
*/
ret = spi_nor_write_enable(nor);
if (ret)
@@ -111,6 +120,38 @@ out:
return ret ?: written;
}
+/**
+ * spi_nor_otp_erase_secr() - erase a security register
+ * @nor: pointer to 'struct spi_nor'
+ * @addr: offset of the security register to be erased
+ *
+ * Erase a security register by using the SPINOR_OP_ESECR command.
+ *
+ * For more information on the term "security register", see the documentation
+ * of spi_nor_otp_read_secr().
+ *
+ * This method is used on GigaDevice and Winbond flashes.
+ *
+ * Return: 0 on success, -errno otherwise
+ */
+int spi_nor_otp_erase_secr(struct spi_nor *nor, loff_t addr)
+{
+ u8 erase_opcode = nor->erase_opcode;
+ int ret;
+
+ ret = spi_nor_write_enable(nor);
+ if (ret)
+ return ret;
+
+ nor->erase_opcode = SPINOR_OP_ESECR;
+ ret = spi_nor_erase_sector(nor, addr);
+ nor->erase_opcode = erase_opcode;
+ if (ret)
+ return ret;
+
+ return spi_nor_wait_till_ready(nor);
+}
+
static int spi_nor_otp_lock_bit_cr(unsigned int region)
{
static const int lock_bits[] = { SR2_LB1, SR2_LB2, SR2_LB3 };
@@ -240,6 +281,29 @@ out:
return ret;
}
+static int spi_nor_mtd_otp_range_is_locked(struct spi_nor *nor, loff_t ofs,
+ size_t len)
+{
+ const struct spi_nor_otp_ops *ops = nor->params->otp.ops;
+ unsigned int region;
+ int locked;
+
+ /*
+ * If any of the affected OTP regions are locked the entire range is
+ * considered locked.
+ */
+ for (region = spi_nor_otp_offset_to_region(nor, ofs);
+ region <= spi_nor_otp_offset_to_region(nor, ofs + len - 1);
+ region++) {
+ locked = ops->is_locked(nor, region);
+ /* take the branch it is locked or in case of an error */
+ if (locked)
+ return locked;
+ }
+
+ return 0;
+}
+
static int spi_nor_mtd_otp_read_write(struct mtd_info *mtd, loff_t ofs,
size_t total_len, size_t *retlen,
const u8 *buf, bool is_write)
@@ -255,14 +319,26 @@ static int spi_nor_mtd_otp_read_write(struct mtd_info *mtd, loff_t ofs,
if (ofs < 0 || ofs >= spi_nor_otp_size(nor))
return 0;
+ /* don't access beyond the end */
+ total_len = min_t(size_t, total_len, spi_nor_otp_size(nor) - ofs);
+
+ if (!total_len)
+ return 0;
+
ret = spi_nor_lock_and_prep(nor);
if (ret)
return ret;
- /* don't access beyond the end */
- total_len = min_t(size_t, total_len, spi_nor_otp_size(nor) - ofs);
+ if (is_write) {
+ ret = spi_nor_mtd_otp_range_is_locked(nor, ofs, total_len);
+ if (ret < 0) {
+ goto out;
+ } else if (ret) {
+ ret = -EROFS;
+ goto out;
+ }
+ }
- *retlen = 0;
while (total_len) {
/*
* The OTP regions are mapped into a contiguous area starting
@@ -316,6 +392,59 @@ static int spi_nor_mtd_otp_write(struct mtd_info *mtd, loff_t to, size_t len,
return spi_nor_mtd_otp_read_write(mtd, to, len, retlen, buf, true);
}
+static int spi_nor_mtd_otp_erase(struct mtd_info *mtd, loff_t from, size_t len)
+{
+ struct spi_nor *nor = mtd_to_spi_nor(mtd);
+ const struct spi_nor_otp_ops *ops = nor->params->otp.ops;
+ const size_t rlen = spi_nor_otp_region_len(nor);
+ unsigned int region;
+ loff_t rstart;
+ int ret;
+
+ /* OTP erase is optional */
+ if (!ops->erase)
+ return -EOPNOTSUPP;
+
+ if (!len)
+ return 0;
+
+ if (from < 0 || (from + len) > spi_nor_otp_size(nor))
+ return -EINVAL;
+
+ /* the user has to explicitly ask for whole regions */
+ if (!IS_ALIGNED(len, rlen) || !IS_ALIGNED(from, rlen))
+ return -EINVAL;
+
+ ret = spi_nor_lock_and_prep(nor);
+ if (ret)
+ return ret;
+
+ ret = spi_nor_mtd_otp_range_is_locked(nor, from, len);
+ if (ret < 0) {
+ goto out;
+ } else if (ret) {
+ ret = -EROFS;
+ goto out;
+ }
+
+ while (len) {
+ region = spi_nor_otp_offset_to_region(nor, from);
+ rstart = spi_nor_otp_region_start(nor, region);
+
+ ret = ops->erase(nor, rstart);
+ if (ret)
+ goto out;
+
+ len -= rlen;
+ from += rlen;
+ }
+
+out:
+ spi_nor_unlock_and_unprep(nor);
+
+ return ret;
+}
+
static int spi_nor_mtd_otp_lock(struct mtd_info *mtd, loff_t from, size_t len)
{
struct spi_nor *nor = mtd_to_spi_nor(mtd);
@@ -374,4 +503,5 @@ void spi_nor_otp_init(struct spi_nor *nor)
mtd->_read_user_prot_reg = spi_nor_mtd_otp_read;
mtd->_write_user_prot_reg = spi_nor_mtd_otp_write;
mtd->_lock_user_prot_reg = spi_nor_mtd_otp_lock;
+ mtd->_erase_user_prot_reg = spi_nor_mtd_otp_erase;
}
diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c
index 23c28e91f698..c500c2118a5d 100644
--- a/drivers/mtd/spi-nor/sfdp.c
+++ b/drivers/mtd/spi-nor/sfdp.c
@@ -16,6 +16,7 @@
(((p)->parameter_table_pointer[2] << 16) | \
((p)->parameter_table_pointer[1] << 8) | \
((p)->parameter_table_pointer[0] << 0))
+#define SFDP_PARAM_HEADER_PARAM_LEN(p) ((p)->length * 4)
#define SFDP_BFPT_ID 0xff00 /* Basic Flash Parameter Table */
#define SFDP_SECTOR_MAP_ID 0xff81 /* Sector Map Table */
@@ -1245,6 +1246,8 @@ int spi_nor_parse_sfdp(struct spi_nor *nor)
struct sfdp_parameter_header *param_headers = NULL;
struct sfdp_header header;
struct device *dev = nor->dev;
+ struct sfdp *sfdp;
+ size_t sfdp_size;
size_t psize;
int i, err;
@@ -1267,6 +1270,9 @@ int spi_nor_parse_sfdp(struct spi_nor *nor)
bfpt_header->major != SFDP_JESD216_MAJOR)
return -EINVAL;
+ sfdp_size = SFDP_PARAM_HEADER_PTP(bfpt_header) +
+ SFDP_PARAM_HEADER_PARAM_LEN(bfpt_header);
+
/*
* Allocate memory then read all parameter headers with a single
* Read SFDP command. These parameter headers will actually be parsed
@@ -1294,6 +1300,58 @@ int spi_nor_parse_sfdp(struct spi_nor *nor)
}
/*
+ * Cache the complete SFDP data. It is not (easily) possible to fetch
+ * SFDP after probe time and we need it for the sysfs access.
+ */
+ for (i = 0; i < header.nph; i++) {
+ param_header = &param_headers[i];
+ sfdp_size = max_t(size_t, sfdp_size,
+ SFDP_PARAM_HEADER_PTP(param_header) +
+ SFDP_PARAM_HEADER_PARAM_LEN(param_header));
+ }
+
+ /*
+ * Limit the total size to a reasonable value to avoid allocating too
+ * much memory just of because the flash returned some insane values.
+ */
+ if (sfdp_size > PAGE_SIZE) {
+ dev_dbg(dev, "SFDP data (%zu) too big, truncating\n",
+ sfdp_size);
+ sfdp_size = PAGE_SIZE;
+ }
+
+ sfdp = devm_kzalloc(dev, sizeof(*sfdp), GFP_KERNEL);
+ if (!sfdp) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ /*
+ * The SFDP is organized in chunks of DWORDs. Thus, in theory, the
+ * sfdp_size should be a multiple of DWORDs. But in case a flash
+ * is not spec compliant, make sure that we have enough space to store
+ * the complete SFDP data.
+ */
+ sfdp->num_dwords = DIV_ROUND_UP(sfdp_size, sizeof(*sfdp->dwords));
+ sfdp->dwords = devm_kcalloc(dev, sfdp->num_dwords,
+ sizeof(*sfdp->dwords), GFP_KERNEL);
+ if (!sfdp->dwords) {
+ err = -ENOMEM;
+ devm_kfree(dev, sfdp);
+ goto exit;
+ }
+
+ err = spi_nor_read_sfdp(nor, 0, sfdp_size, sfdp->dwords);
+ if (err < 0) {
+ dev_dbg(dev, "failed to read SFDP data\n");
+ devm_kfree(dev, sfdp->dwords);
+ devm_kfree(dev, sfdp);
+ goto exit;
+ }
+
+ nor->sfdp = sfdp;
+
+ /*
* Check other parameter headers to get the latest revision of
* the basic flash parameter table.
*/
diff --git a/drivers/mtd/spi-nor/sysfs.c b/drivers/mtd/spi-nor/sysfs.c
new file mode 100644
index 000000000000..9aec9d8a98ad
--- /dev/null
+++ b/drivers/mtd/spi-nor/sysfs.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/mtd/spi-nor.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/spi-mem.h>
+#include <linux/sysfs.h>
+
+#include "core.h"
+
+static ssize_t manufacturer_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct spi_mem *spimem = spi_get_drvdata(spi);
+ struct spi_nor *nor = spi_mem_get_drvdata(spimem);
+
+ return sysfs_emit(buf, "%s\n", nor->manufacturer->name);
+}
+static DEVICE_ATTR_RO(manufacturer);
+
+static ssize_t partname_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct spi_mem *spimem = spi_get_drvdata(spi);
+ struct spi_nor *nor = spi_mem_get_drvdata(spimem);
+
+ return sysfs_emit(buf, "%s\n", nor->info->name);
+}
+static DEVICE_ATTR_RO(partname);
+
+static ssize_t jedec_id_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ struct spi_mem *spimem = spi_get_drvdata(spi);
+ struct spi_nor *nor = spi_mem_get_drvdata(spimem);
+
+ return sysfs_emit(buf, "%*phN\n", nor->info->id_len, nor->info->id);
+}
+static DEVICE_ATTR_RO(jedec_id);
+
+static struct attribute *spi_nor_sysfs_entries[] = {
+ &dev_attr_manufacturer.attr,
+ &dev_attr_partname.attr,
+ &dev_attr_jedec_id.attr,
+ NULL
+};
+
+static ssize_t sfdp_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf,
+ loff_t off, size_t count)
+{
+ struct spi_device *spi = to_spi_device(kobj_to_dev(kobj));
+ struct spi_mem *spimem = spi_get_drvdata(spi);
+ struct spi_nor *nor = spi_mem_get_drvdata(spimem);
+ struct sfdp *sfdp = nor->sfdp;
+ size_t sfdp_size = sfdp->num_dwords * sizeof(*sfdp->dwords);
+
+ return memory_read_from_buffer(buf, count, &off, nor->sfdp->dwords,
+ sfdp_size);
+}
+static BIN_ATTR_RO(sfdp, 0);
+
+static struct bin_attribute *spi_nor_sysfs_bin_entries[] = {
+ &bin_attr_sfdp,
+ NULL
+};
+
+static umode_t spi_nor_sysfs_is_bin_visible(struct kobject *kobj,
+ struct bin_attribute *attr, int n)
+{
+ struct spi_device *spi = to_spi_device(kobj_to_dev(kobj));
+ struct spi_mem *spimem = spi_get_drvdata(spi);
+ struct spi_nor *nor = spi_mem_get_drvdata(spimem);
+
+ if (attr == &bin_attr_sfdp && nor->sfdp)
+ return 0444;
+
+ return 0;
+}
+
+static const struct attribute_group spi_nor_sysfs_group = {
+ .name = "spi-nor",
+ .is_bin_visible = spi_nor_sysfs_is_bin_visible,
+ .attrs = spi_nor_sysfs_entries,
+ .bin_attrs = spi_nor_sysfs_bin_entries,
+};
+
+const struct attribute_group *spi_nor_sysfs_groups[] = {
+ &spi_nor_sysfs_group,
+ NULL
+};
diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index 9a81c67a60c6..96573f61caf5 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -139,6 +139,7 @@ static int winbond_set_4byte_addr_mode(struct spi_nor *nor, bool enable)
static const struct spi_nor_otp_ops winbond_otp_ops = {
.read = spi_nor_otp_read_secr,
.write = spi_nor_otp_write_secr,
+ .erase = spi_nor_otp_erase_secr,
.lock = spi_nor_otp_lock_sr2,
.is_locked = spi_nor_otp_is_locked_sr2,
};