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authorHauke Mehrtens <hauke@hauke-m.de>2014-08-21 21:10:29 +0000
committerHauke Mehrtens <hauke@hauke-m.de>2014-08-21 21:10:29 +0000
commitb118879cc39270c623239a9775ad3acdfdbbcc35 (patch)
treed61f624d9e90e9e44cefbb34ecfa8c47c40ae80b /target
parenta81f3568737bfbeb8446c34c087fa6a383932fb4 (diff)
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bcm53xx: backport more spi-nor patches
Signed-off-by: Rafał Miłecki <zajec5@gmail.com> SVN-Revision: 42259
Diffstat (limited to 'target')
-rw-r--r--target/linux/bcm53xx/config-3.141
-rw-r--r--target/linux/bcm53xx/patches-3.14/002-mtd-spi-nor-queued-for-3.18.patch39
-rw-r--r--target/linux/bcm53xx/patches-3.14/400-mtd-move-support-for-struct-flash_platform_data-into.patch52
-rw-r--r--target/linux/bcm53xx/patches-3.14/401-mtd-spi-nor-add-Kconfig-option-to-disable-4K-sectors.patch44
-rw-r--r--target/linux/bcm53xx/patches-3.14/402-mtd-spi-nor-allow-NULL-as-spi_device_id-in-spi_nor_s.patch46
-rw-r--r--target/linux/bcm53xx/patches-3.14/403-mtd-spi-nor-refactor-wait-till-ready.patch374
6 files changed, 556 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/config-3.14 b/target/linux/bcm53xx/config-3.14
index f703522..e0fd0fd 100644
--- a/target/linux/bcm53xx/config-3.14
+++ b/target/linux/bcm53xx/config-3.14
@@ -168,6 +168,7 @@ CONFIG_MODULES_USE_ELF_REL=y
CONFIG_MTD_BCM47XX_PARTS=y
# CONFIG_MTD_PHYSMAP_OF is not set
CONFIG_MTD_SPI_NOR=y
+# CONFIG_MTD_SPI_NOR_USE_4K_SECTORS is not set
CONFIG_MULTI_IRQ_HANDLER=y
CONFIG_MUTEX_SPIN_ON_OWNER=y
CONFIG_NEED_DMA_MAP_STATE=y
diff --git a/target/linux/bcm53xx/patches-3.14/002-mtd-spi-nor-queued-for-3.18.patch b/target/linux/bcm53xx/patches-3.14/002-mtd-spi-nor-queued-for-3.18.patch
new file mode 100644
index 0000000..7505a17
--- /dev/null
+++ b/target/linux/bcm53xx/patches-3.14/002-mtd-spi-nor-queued-for-3.18.patch
@@ -0,0 +1,39 @@
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -611,6 +611,7 @@ const struct spi_device_id spi_nor_ids[]
+ { "m25px32-s0", INFO(0x207316, 0, 64 * 1024, 64, SECT_4K) },
+ { "m25px32-s1", INFO(0x206316, 0, 64 * 1024, 64, SECT_4K) },
+ { "m25px64", INFO(0x207117, 0, 64 * 1024, 128, 0) },
++ { "m25px80", INFO(0x207114, 0, 64 * 1024, 16, 0) },
+
+ /* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
+ { "w25x10", INFO(0xef3011, 0, 64 * 1024, 2, SECT_4K) },
+@@ -623,7 +624,6 @@ const struct spi_device_id spi_nor_ids[]
+ { "w25q32dw", INFO(0xef6016, 0, 64 * 1024, 64, SECT_4K) },
+ { "w25x64", INFO(0xef3017, 0, 64 * 1024, 128, SECT_4K) },
+ { "w25q64", INFO(0xef4017, 0, 64 * 1024, 128, SECT_4K) },
+- { "w25q128", INFO(0xef4018, 0, 64 * 1024, 256, SECT_4K) },
+ { "w25q80", INFO(0xef5014, 0, 64 * 1024, 16, SECT_4K) },
+ { "w25q80bl", INFO(0xef4014, 0, 64 * 1024, 16, SECT_4K) },
+ { "w25q128", INFO(0xef4018, 0, 64 * 1024, 256, SECT_4K) },
+@@ -671,11 +671,6 @@ static const struct spi_device_id *spi_n
+ return ERR_PTR(-ENODEV);
+ }
+
+-static const struct spi_device_id *jedec_probe(struct spi_nor *nor)
+-{
+- return nor->read_id(nor);
+-}
+-
+ static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+ {
+@@ -958,7 +953,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ if (info->jedec_id) {
+ const struct spi_device_id *jid;
+
+- jid = jedec_probe(nor);
++ jid = nor->read_id(nor);
+ if (IS_ERR(jid)) {
+ return PTR_ERR(jid);
+ } else if (jid != id) {
diff --git a/target/linux/bcm53xx/patches-3.14/400-mtd-move-support-for-struct-flash_platform_data-into.patch b/target/linux/bcm53xx/patches-3.14/400-mtd-move-support-for-struct-flash_platform_data-into.patch
new file mode 100644
index 0000000..8076f55
--- /dev/null
+++ b/target/linux/bcm53xx/patches-3.14/400-mtd-move-support-for-struct-flash_platform_data-into.patch
@@ -0,0 +1,52 @@
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -915,7 +915,6 @@ int spi_nor_scan(struct spi_nor *nor, co
+ enum read_mode mode)
+ {
+ struct flash_info *info;
+- struct flash_platform_data *data;
+ struct device *dev = nor->dev;
+ struct mtd_info *mtd = nor->mtd;
+ struct device_node *np = dev->of_node;
+@@ -926,28 +925,6 @@ int spi_nor_scan(struct spi_nor *nor, co
+ if (ret)
+ return ret;
+
+- /* Platform data helps sort out which chip type we have, as
+- * well as how this board partitions it. If we don't have
+- * a chip ID, try the JEDEC id commands; they'll work for most
+- * newer chips, even if we don't recognize the particular chip.
+- */
+- data = dev_get_platdata(dev);
+- if (data && data->type) {
+- const struct spi_device_id *plat_id;
+-
+- for (i = 0; i < ARRAY_SIZE(spi_nor_ids) - 1; i++) {
+- plat_id = &spi_nor_ids[i];
+- if (strcmp(data->type, plat_id->name))
+- continue;
+- break;
+- }
+-
+- if (i < ARRAY_SIZE(spi_nor_ids) - 1)
+- id = plat_id;
+- else
+- dev_warn(dev, "unrecognized id %s\n", data->type);
+- }
+-
+ info = (void *)id->driver_data;
+
+ if (info->jedec_id) {
+@@ -985,11 +962,8 @@ int spi_nor_scan(struct spi_nor *nor, co
+ write_sr(nor, 0);
+ }
+
+- if (data && data->name)
+- mtd->name = data->name;
+- else
++ if (!mtd->name)
+ mtd->name = dev_name(dev);
+-
+ mtd->type = MTD_NORFLASH;
+ mtd->writesize = 1;
+ mtd->flags = MTD_CAP_NORFLASH;
diff --git a/target/linux/bcm53xx/patches-3.14/401-mtd-spi-nor-add-Kconfig-option-to-disable-4K-sectors.patch b/target/linux/bcm53xx/patches-3.14/401-mtd-spi-nor-add-Kconfig-option-to-disable-4K-sectors.patch
new file mode 100644
index 0000000..395b0af
--- /dev/null
+++ b/target/linux/bcm53xx/patches-3.14/401-mtd-spi-nor-add-Kconfig-option-to-disable-4K-sectors.patch
@@ -0,0 +1,44 @@
+--- a/drivers/mtd/spi-nor/Kconfig
++++ b/drivers/mtd/spi-nor/Kconfig
+@@ -7,6 +7,20 @@ menuconfig MTD_SPI_NOR
+
+ if MTD_SPI_NOR
+
++config MTD_SPI_NOR_USE_4K_SECTORS
++ bool "Use small 4096 B erase sectors"
++ default y
++ help
++ Many flash memories support erasing small (4096 B) sectors. Depending
++ on the usage this feature may provide performance gain in comparison
++ to erasing whole blocks (32/64 KiB).
++ Changing small part of flash content is usually faster with small
++ sectors. On the other hand erasing should be faster when using 64 KiB
++ block instead of 16 × 4 KiB sectors.
++
++ Please note that some tools/drivers/filesystems may not work with
++ 4096 B erase size (e.g. UBIFS requires 15 KiB as a minimum).
++
+ config SPI_FSL_QUADSPI
+ tristate "Freescale Quad SPI controller"
+ depends on ARCH_MXC
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -987,6 +987,7 @@ int spi_nor_scan(struct spi_nor *nor, co
+ nor->wait_till_ready == spi_nor_wait_till_ready)
+ nor->wait_till_ready = spi_nor_wait_till_fsr_ready;
+
++#ifdef CONFIG_MTD_SPI_NOR_USE_4K_SECTORS
+ /* prefer "small sector" erase if possible */
+ if (info->flags & SECT_4K) {
+ nor->erase_opcode = SPINOR_OP_BE_4K;
+@@ -994,7 +995,9 @@ int spi_nor_scan(struct spi_nor *nor, co
+ } else if (info->flags & SECT_4K_PMC) {
+ nor->erase_opcode = SPINOR_OP_BE_4K_PMC;
+ mtd->erasesize = 4096;
+- } else {
++ } else
++#endif
++ {
+ nor->erase_opcode = SPINOR_OP_SE;
+ mtd->erasesize = info->sector_size;
+ }
diff --git a/target/linux/bcm53xx/patches-3.14/402-mtd-spi-nor-allow-NULL-as-spi_device_id-in-spi_nor_s.patch b/target/linux/bcm53xx/patches-3.14/402-mtd-spi-nor-allow-NULL-as-spi_device_id-in-spi_nor_s.patch
new file mode 100644
index 0000000..6cc7752
--- /dev/null
+++ b/target/linux/bcm53xx/patches-3.14/402-mtd-spi-nor-allow-NULL-as-spi_device_id-in-spi_nor_s.patch
@@ -0,0 +1,46 @@
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -925,29 +925,23 @@ int spi_nor_scan(struct spi_nor *nor, co
+ if (ret)
+ return ret;
+
+- info = (void *)id->driver_data;
+-
+- if (info->jedec_id) {
+- const struct spi_device_id *jid;
+-
+- jid = nor->read_id(nor);
+- if (IS_ERR(jid)) {
+- return PTR_ERR(jid);
+- } else if (jid != id) {
+- /*
+- * JEDEC knows better, so overwrite platform ID. We
+- * can't trust partitions any longer, but we'll let
+- * mtd apply them anyway, since some partitions may be
+- * marked read-only, and we don't want to lose that
+- * information, even if it's not 100% accurate.
+- */
+- dev_warn(dev, "found %s, expected %s\n",
+- jid->name, id->name);
+- id = jid;
+- info = (void *)jid->driver_data;
++ if (id) {
++ info = (void *)id->driver_data;
++ if (info->jedec_id) {
++ dev_warn(dev,
++ "passed SPI device ID (%s) contains JEDEC, ignoring it, driver should be fixed!\n",
++ id->name);
++ id = NULL;
+ }
+ }
+
++ if (!id) {
++ id = nor->read_id(nor);
++ if (IS_ERR(id))
++ return PTR_ERR(id);
++ }
++ info = (void *)id->driver_data;
++
+ mutex_init(&nor->lock);
+
+ /*
diff --git a/target/linux/bcm53xx/patches-3.14/403-mtd-spi-nor-refactor-wait-till-ready.patch b/target/linux/bcm53xx/patches-3.14/403-mtd-spi-nor-refactor-wait-till-ready.patch
new file mode 100644
index 0000000..79a5131
--- /dev/null
+++ b/target/linux/bcm53xx/patches-3.14/403-mtd-spi-nor-refactor-wait-till-ready.patch
@@ -0,0 +1,374 @@
+--- a/drivers/mtd/spi-nor/fsl-quadspi.c
++++ b/drivers/mtd/spi-nor/fsl-quadspi.c
+@@ -719,16 +719,10 @@ static int fsl_qspi_read(struct spi_nor
+ {
+ struct fsl_qspi *q = nor->priv;
+ u8 cmd = nor->read_opcode;
+- int ret;
+
+ dev_dbg(q->dev, "cmd [%x],read from (0x%p, 0x%.8x, 0x%.8x),len:%d\n",
+ cmd, q->ahb_base, q->chip_base_addr, (unsigned int)from, len);
+
+- /* Wait until the previous command is finished. */
+- ret = nor->wait_till_ready(nor);
+- if (ret)
+- return ret;
+-
+ /* Read out the data directly from the AHB buffer.*/
+ memcpy(buf, q->ahb_base + q->chip_base_addr + from, len);
+
+@@ -744,16 +738,6 @@ static int fsl_qspi_erase(struct spi_nor
+ dev_dbg(nor->dev, "%dKiB at 0x%08x:0x%08x\n",
+ nor->mtd->erasesize / 1024, q->chip_base_addr, (u32)offs);
+
+- /* Wait until finished previous write command. */
+- ret = nor->wait_till_ready(nor);
+- if (ret)
+- return ret;
+-
+- /* Send write enable, then erase commands. */
+- ret = nor->write_reg(nor, SPINOR_OP_WREN, NULL, 0, 0);
+- if (ret)
+- return ret;
+-
+ ret = fsl_qspi_runcmd(q, nor->erase_opcode, offs, 0);
+ if (ret)
+ return ret;
+--- a/drivers/mtd/spi-nor/spi-nor.c
++++ b/drivers/mtd/spi-nor/spi-nor.c
+@@ -163,81 +163,69 @@ static inline int set_4byte(struct spi_n
+ return nor->write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1, 0);
+ }
+ }
+-
+-static int spi_nor_wait_till_ready(struct spi_nor *nor)
++static inline int spi_nor_sr_ready(struct spi_nor *nor)
+ {
+- unsigned long deadline;
+- int sr;
+-
+- deadline = jiffies + MAX_READY_WAIT_JIFFIES;
+-
+- do {
+- cond_resched();
++ int sr = read_sr(nor);
++ if (sr < 0)
++ return sr;
++ else
++ return !(sr & SR_WIP);
++}
+
+- sr = read_sr(nor);
+- if (sr < 0)
+- break;
+- else if (!(sr & SR_WIP))
+- return 0;
+- } while (!time_after_eq(jiffies, deadline));
++static inline int spi_nor_fsr_ready(struct spi_nor *nor)
++{
++ int fsr = read_fsr(nor);
++ if (fsr < 0)
++ return fsr;
++ else
++ return fsr & FSR_READY;
++}
+
+- return -ETIMEDOUT;
++static int spi_nor_ready(struct spi_nor *nor)
++{
++ int sr, fsr;
++ sr = spi_nor_sr_ready(nor);
++ if (sr < 0)
++ return sr;
++ fsr = nor->flags & SNOR_F_USE_FSR ? spi_nor_fsr_ready(nor) : 1;
++ if (fsr < 0)
++ return sr;
++ return sr && fsr;
+ }
+
+-static int spi_nor_wait_till_fsr_ready(struct spi_nor *nor)
++/*
++ * Service routine to read status register until ready, or timeout occurs.
++ * Returns non-zero if error.
++ */
++static int spi_nor_wait_till_ready(struct spi_nor *nor)
+ {
+ unsigned long deadline;
+- int sr;
+- int fsr;
++ int ret;
+
+ deadline = jiffies + MAX_READY_WAIT_JIFFIES;
+
+ do {
+ cond_resched();
+
+- sr = read_sr(nor);
+- if (sr < 0) {
+- break;
+- } else if (!(sr & SR_WIP)) {
+- fsr = read_fsr(nor);
+- if (fsr < 0)
+- break;
+- if (fsr & FSR_READY)
+- return 0;
+- }
++ ret = spi_nor_ready(nor);
++ if (ret < 0)
++ return ret;
++ if (ret)
++ return 0;
+ } while (!time_after_eq(jiffies, deadline));
+
+ return -ETIMEDOUT;
+ }
+
+ /*
+- * Service routine to read status register until ready, or timeout occurs.
+- * Returns non-zero if error.
+- */
+-static int wait_till_ready(struct spi_nor *nor)
+-{
+- return nor->wait_till_ready(nor);
+-}
+-
+-/*
+ * Erase the whole flash memory
+ *
+ * Returns 0 if successful, non-zero otherwise.
+ */
+ static int erase_chip(struct spi_nor *nor)
+ {
+- int ret;
+-
+ dev_dbg(nor->dev, " %lldKiB\n", (long long)(nor->mtd->size >> 10));
+
+- /* Wait until finished previous write command. */
+- ret = wait_till_ready(nor);
+- if (ret)
+- return ret;
+-
+- /* Send write enable, then erase commands. */
+- write_enable(nor);
+-
+ return nor->write_reg(nor, SPINOR_OP_CHIP_ERASE, NULL, 0, 0);
+ }
+
+@@ -290,6 +278,8 @@ static int spi_nor_erase(struct mtd_info
+ if (ret)
+ return ret;
+
++ write_enable(nor);
++
+ /* whole-chip erase? */
+ if (len == mtd->size) {
+ if (erase_chip(nor)) {
+@@ -297,6 +287,10 @@ static int spi_nor_erase(struct mtd_info
+ goto erase_err;
+ }
+
++ ret = spi_nor_wait_till_ready(nor);
++ if (ret)
++ goto erase_err;
++
+ /* REVISIT in some cases we could speed up erasing large regions
+ * by using SPINOR_OP_SE instead of SPINOR_OP_BE_4K. We may have set up
+ * to use "small sector erase", but that's not always optimal.
+@@ -312,9 +306,15 @@ static int spi_nor_erase(struct mtd_info
+
+ addr += mtd->erasesize;
+ len -= mtd->erasesize;
++
++ ret = spi_nor_wait_till_ready(nor);
++ if (ret)
++ goto erase_err;
+ }
+ }
+
++ write_disable(nor);
++
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_ERASE);
+
+ instr->state = MTD_ERASE_DONE;
+@@ -339,11 +339,6 @@ static int spi_nor_lock(struct mtd_info
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous command */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto err;
+-
+ status_old = read_sr(nor);
+
+ if (offset < mtd->size - (mtd->size / 2))
+@@ -386,11 +381,6 @@ static int spi_nor_unlock(struct mtd_inf
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous command */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto err;
+-
+ status_old = read_sr(nor);
+
+ if (offset+len > mtd->size - (mtd->size / 64))
+@@ -702,11 +692,6 @@ static int sst_write(struct mtd_info *mt
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous write command. */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto time_out;
+-
+ write_enable(nor);
+
+ nor->sst_write_second = false;
+@@ -718,7 +703,7 @@ static int sst_write(struct mtd_info *mt
+
+ /* write one byte. */
+ nor->write(nor, to, 1, retlen, buf);
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+ }
+@@ -730,7 +715,7 @@ static int sst_write(struct mtd_info *mt
+
+ /* write two bytes. */
+ nor->write(nor, to, 2, retlen, buf + actual);
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+ to += 2;
+@@ -739,7 +724,7 @@ static int sst_write(struct mtd_info *mt
+ nor->sst_write_second = false;
+
+ write_disable(nor);
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+
+@@ -750,7 +735,7 @@ static int sst_write(struct mtd_info *mt
+ nor->program_opcode = SPINOR_OP_BP;
+ nor->write(nor, to, 1, retlen, buf + actual);
+
+- ret = wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
+ if (ret)
+ goto time_out;
+ write_disable(nor);
+@@ -778,11 +763,6 @@ static int spi_nor_write(struct mtd_info
+ if (ret)
+ return ret;
+
+- /* Wait until finished previous write command. */
+- ret = wait_till_ready(nor);
+- if (ret)
+- goto write_err;
+-
+ write_enable(nor);
+
+ page_offset = to & (nor->page_size - 1);
+@@ -801,16 +781,20 @@ static int spi_nor_write(struct mtd_info
+ if (page_size > nor->page_size)
+ page_size = nor->page_size;
+
+- wait_till_ready(nor);
++ ret = spi_nor_wait_till_ready(nor);
++ if (ret)
++ goto write_err;
++
+ write_enable(nor);
+
+ nor->write(nor, to + i, page_size, retlen, buf + i);
+ }
+ }
+
++ ret = spi_nor_wait_till_ready(nor);
+ write_err:
+ spi_nor_unlock_and_unprep(nor, SPI_NOR_OPS_WRITE);
+- return 0;
++ return ret;
+ }
+
+ static int macronix_quad_enable(struct spi_nor *nor)
+@@ -823,7 +807,7 @@ static int macronix_quad_enable(struct s
+ nor->cmd_buf[0] = val | SR_QUAD_EN_MX;
+ nor->write_reg(nor, SPINOR_OP_WRSR, nor->cmd_buf, 1, 0);
+
+- if (wait_till_ready(nor))
++ if (spi_nor_wait_till_ready(nor))
+ return 1;
+
+ ret = read_sr(nor);
+@@ -905,8 +889,6 @@ static int spi_nor_check(struct spi_nor
+
+ if (!nor->read_id)
+ nor->read_id = spi_nor_read_id;
+- if (!nor->wait_till_ready)
+- nor->wait_till_ready = spi_nor_wait_till_ready;
+
+ return 0;
+ }
+@@ -977,9 +959,8 @@ int spi_nor_scan(struct spi_nor *nor, co
+ else
+ mtd->_write = spi_nor_write;
+
+- if ((info->flags & USE_FSR) &&
+- nor->wait_till_ready == spi_nor_wait_till_ready)
+- nor->wait_till_ready = spi_nor_wait_till_fsr_ready;
++ if (info->flags & USE_FSR)
++ nor->flags |= SNOR_F_USE_FSR;
+
+ #ifdef CONFIG_MTD_SPI_NOR_USE_4K_SECTORS
+ /* prefer "small sector" erase if possible */
+--- a/include/linux/mtd/spi-nor.h
++++ b/include/linux/mtd/spi-nor.h
+@@ -116,6 +116,10 @@ enum spi_nor_ops {
+ SPI_NOR_OPS_UNLOCK,
+ };
+
++enum spi_nor_option_flags {
++ SNOR_F_USE_FSR = BIT(0),
++};
++
+ /**
+ * struct spi_nor - Structure for defining a the SPI NOR layer
+ * @mtd: point to a mtd_info structure
+@@ -129,6 +133,7 @@ enum spi_nor_ops {
+ * @program_opcode: the program opcode
+ * @flash_read: the mode of the read
+ * @sst_write_second: used by the SST write operation
++ * @flags: flag options for the current SPI-NOR (SNOR_F_*)
+ * @cfg: used by the read_xfer/write_xfer
+ * @cmd_buf: used by the write_reg
+ * @prepare: [OPTIONAL] do some preparations for the
+@@ -141,7 +146,6 @@ enum spi_nor_ops {
+ * @write_reg: [DRIVER-SPECIFIC] write data to the register
+ * @read_id: [REPLACEABLE] read out the ID data, and find
+ * the proper spi_device_id
+- * @wait_till_ready: [REPLACEABLE] wait till the NOR becomes ready
+ * @read: [DRIVER-SPECIFIC] read data from the SPI NOR
+ * @write: [DRIVER-SPECIFIC] write data to the SPI NOR
+ * @erase: [DRIVER-SPECIFIC] erase a sector of the SPI NOR
+@@ -160,6 +164,7 @@ struct spi_nor {
+ u8 program_opcode;
+ enum read_mode flash_read;
+ bool sst_write_second;
++ u32 flags;
+ struct spi_nor_xfer_cfg cfg;
+ u8 cmd_buf[SPI_NOR_MAX_CMD_SIZE];
+
+@@ -173,7 +178,6 @@ struct spi_nor {
+ int (*write_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len,
+ int write_enable);
+ const struct spi_device_id *(*read_id)(struct spi_nor *nor);
+- int (*wait_till_ready)(struct spi_nor *nor);
+
+ int (*read)(struct spi_nor *nor, loff_t from,
+ size_t len, size_t *retlen, u_char *read_buf);