Merge tag 'for-linus-20131112' of git://git.infradead.org/linux-mtd

Pull MTD changes from Brian Norris:
 - Unify some compile-time differences so that we have fewer uses of
   #ifdef CONFIG_OF in atmel_nand
 - Other general cleanups (removing unused functions, options,
   variables, fields; use correct interfaces)
 - Fix BUG() for new odd-sized NAND, which report non-power-of-2
   dimensions via ONFI
 - Miscellaneous driver fixes (SPI NOR flash; BCM47xx NAND flash; etc.)
 - Improve differentiation between SLC and MLC NAND -- this clarifies an
   ABI issue regarding the MTD "type" (in sysfs and in the MEMGETINFO
   ioctl), where the MTD_MLCNANDFLASH type was present but
   inconsistently used
 - Extend GPMI NAND to support multi-chip-select NAND for some platforms
 - Many improvements to the OMAP2/3 NAND driver, including an expanded
   DT binding to bring us closer to mainline support for some OMAP
   systems
 - Fix a deadlock in the error path of the Atmel NAND driver probe
 - Correct the error codes from MTD mmap() to conform to POSIX and the
   Linux Programmer's Manual.  This is an acknowledged change in the MTD
   ABI, but I can't imagine somebody relying on the non-standard -ENOSYS
   error code specifically.  Am I just being unimaginative? :)
 - Fix a few important GPMI NAND bugs (one regression from 3.12 and one
   long-standing race condition)
 - More? Read the log!

* tag 'for-linus-20131112' of git://git.infradead.org/linux-mtd: (98 commits)
  mtd: gpmi: fix the NULL pointer
  mtd: gpmi: fix kernel BUG due to racing DMA operations
  mtd: mtdchar: return expected errors on mmap() call
  mtd: gpmi: only scan two chips for imx6
  mtd: gpmi: Use devm_kzalloc()
  mtd: atmel_nand: fix bug driver will in a dead lock if no nand detected
  mtd: nand: use a local variable to simplify the nand_scan_tail
  mtd: nand: remove deprecated IRQF_DISABLED
  mtd: dataflash: Say if we find a device we don't support
  mtd: nand: omap: fix error return code in omap_nand_probe()
  mtd: nand_bbt: kill NAND_BBT_SCANALLPAGES
  mtd: m25p80: fixup device removal failure path
  mtd: mxc_nand: Include linux/of.h header
  mtd: remove duplicated include from mtdcore.c
  mtd: m25p80: add support for Macronix mx25l3255e
  mtd: nand: omap: remove selection of BCH ecc-scheme via KConfig
  mtd: nand: omap: updated devm_xx for all resource allocation and free calls
  mtd: nand: omap: use drivers/mtd/nand/nand_bch.c wrapper for BCH ECC instead of lib/bch.c
  mtd: nand: omap: clean-up ecc layout for BCH ecc schemes
  mtd: nand: omap2: clean-up BCHx_HW and BCHx_SW ECC configurations in device_probe
  ...

1 files changed, 12 insertions, 4 deletions

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index ac8e89d5a79..9e6c8f9f306 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -198,6 +198,7 @@ typedef enum {
 /* Cell info constants */
 #define NAND_CI_CHIPNR_MSK	0x03
 #define NAND_CI_CELLTYPE_MSK	0x0C
+#define NAND_CI_CELLTYPE_SHIFT	2
 
 /* Keep gcc happy */
 struct nand_chip;
@@ -477,7 +478,7 @@ struct nand_buffers {
  * @badblockbits:	[INTERN] minimum number of set bits in a good block's
  *			bad block marker position; i.e., BBM == 11110111b is
  *			not bad when badblockbits == 7
- * @cellinfo:		[INTERN] MLC/multichip data from chip ident
+ * @bits_per_cell:	[INTERN] number of bits per cell. i.e., 1 means SLC.
  * @ecc_strength_ds:	[INTERN] ECC correctability from the datasheet.
  *			Minimum amount of bit errors per @ecc_step_ds guaranteed
  *			to be correctable. If unknown, set to zero.
@@ -498,7 +499,6 @@ struct nand_buffers {
  *			supported, 0 otherwise.
  * @onfi_set_features:	[REPLACEABLE] set the features for ONFI nand
  * @onfi_get_features:	[REPLACEABLE] get the features for ONFI nand
- * @ecclayout:		[REPLACEABLE] the default ECC placement scheme
  * @bbt:		[INTERN] bad block table pointer
  * @bbt_td:		[REPLACEABLE] bad block table descriptor for flash
  *			lookup.
@@ -559,7 +559,7 @@ struct nand_chip {
 	int pagebuf;
 	unsigned int pagebuf_bitflips;
 	int subpagesize;
-	uint8_t cellinfo;
+	uint8_t bits_per_cell;
 	uint16_t ecc_strength_ds;
 	uint16_t ecc_step_ds;
 	int badblockpos;
@@ -572,7 +572,6 @@ struct nand_chip {
 
 	uint8_t *oob_poi;
 	struct nand_hw_control *controller;
-	struct nand_ecclayout *ecclayout;
 
 	struct nand_ecc_ctrl ecc;
 	struct nand_buffers *buffers;
@@ -797,4 +796,13 @@ static inline int onfi_get_sync_timing_mode(struct nand_chip *chip)
 	return le16_to_cpu(chip->onfi_params.src_sync_timing_mode);
 }
 
+/*
+ * Check if it is a SLC nand.
+ * The !nand_is_slc() can be used to check the MLC/TLC nand chips.
+ * We do not distinguish the MLC and TLC now.
+ */
+static inline bool nand_is_slc(struct nand_chip *chip)
+{
+	return chip->bits_per_cell == 1;
+}
 #endif /* __LINUX_MTD_NAND_H */