bcm53xx: backport more spi-nor patches

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42259 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/bcm53xx/config-3.14 b/target/linux/bcm53xx/config-3.14
index f703522..e0fd0fd 100644 (file)
--- 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 (file)
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 (file)
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 (file)
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 (file)
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 (file)
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);