[MTD] Add platform support for NAND

Add the data structures necessary to provide platform device support
for NAND

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 47 insertions, 0 deletions

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index b8792be3c4e..05c6ecc0703 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -510,4 +510,51 @@ extern int nand_do_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
 #define NAND_SMALL_BADBLOCK_POS         5
 #define NAND_LARGE_BADBLOCK_POS         0
 
+/**
+ * struct platform_nand_chip - chip level device structure
+ *
+ * @nr_chips:           max. number of chips to scan for
+ * @chip_offs:          chip number offset
+ * @nr_partitions:      number of partitions pointed to be partitoons (or zero)
+ * @partitions:         mtd partition list
+ * @chip_delay:         R/B delay value in us
+ * @options:            Option flags, e.g. 16bit buswidth
+ * @priv:               hardware controller specific settings
+ */
+struct platform_nand_chip {
+        int                     nr_chips;
+        int                     chip_offset;
+        int                     nr_partitions;
+        struct mtd_partition    *partitions;
+        int                     chip_delay;
+        unsigned int            options;
+        void                    *priv;
+};
+
+/**
+ * struct platform_nand_ctrl - controller level device structure
+ *
+ * @hwcontrol:          platform specific hardware control structure
+ * @dev_ready:          platform specific function to read ready/busy pin
+ * @select_chip:        platform specific chip select function
+ * @priv_data:          private data to transport driver specific settings
+ *
+ * All fields are optional and depend on the hardware driver requirements
+ */
+struct platform_nand_ctrl {
+        void            (*hwcontrol)(struct mtd_info *mtd, int cmd);
+        int             (*dev_ready)(struct mtd_info *mtd);
+        void            (*select_chip)(struct mtd_info *mtd, int chip);
+        void            *priv;
+};
+
+/* Some helpers to access the data structures */
+static inline
+struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)
+{
+        struct nand_chip *chip = mtd->priv;
+
+        return chip->priv;
+}
+
 #endif /* __LINUX_MTD_NAND_H */