mtd: nand: Expose data interface for ONFI mode 0

The nand layer will need ONFI mode 0 to use it as timing mode
before and right after reset.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

diff --git a/drivers/mtd/nand/nand_timings.c b/drivers/mtd/nand/nand_timings.c
index 7441d68..13a5874 100644 (file)
--- a/drivers/mtd/nand/nand_timings.c
+++ b/drivers/mtd/nand/nand_timings.c
@@ -298,3 +298,14 @@ int onfi_init_data_interface(struct nand_chip *chip,
        return 0;
 }
 EXPORT_SYMBOL(onfi_init_data_interface);
+
+/**
+ * nand_get_default_data_interface - [NAND Interface] Retrieve NAND
+ * data interface for mode 0. This is used as default timing after
+ * reset.
+ */
+const struct nand_data_interface *nand_get_default_data_interface(void)
+{
+       return &onfi_sdr_timings[0];
+}
+EXPORT_SYMBOL(nand_get_default_data_interface);

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 1f34c04..0c9412c 100644 (file)
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -1154,6 +1154,8 @@ static inline int jedec_feature(struct nand_chip *chip)
 
 /* get timing characteristics from ONFI timing mode. */
 const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode);
+/* get data interface from ONFI timing mode 0, used after reset. */
+const struct nand_data_interface *nand_get_default_data_interface(void);
 
 int nand_check_erased_ecc_chunk(void *data, int datalen,
                                void *ecc, int ecclen,