diff mbox series

[08/22] mtd: nand: Expose data interface for ONFI mode 0

Message ID 1511285912-12452-9-git-send-email-yamada.masahiro@socionext.com
State Accepted
Commit b893e83330662393ff40d4dc8cb2733599beb26a
Headers show
Series mtd: nand: imports NAND core updates from Linux 4.15-rc1 and sync Denali driver | expand

Commit Message

Masahiro Yamada Nov. 21, 2017, 5:38 p.m. UTC 
From: Sascha Hauer <s.hauer@pengutronix.de>

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>
[Linux commit: 6e1f9708dbf3c50a8da93c1952a01a7a2acb5e66]
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

---

 drivers/mtd/nand/nand_timings.c | 11 +++++++++++
 include/linux/mtd/nand.h        |  2 ++
 2 files changed, 13 insertions(+)
diff mbox series

Patch

diff --git a/drivers/mtd/nand/nand_timings.c b/drivers/mtd/nand/nand_timings.c
index b055d27..ba4f22f 100644
--- a/drivers/mtd/nand/nand_timings.c
+++ b/drivers/mtd/nand/nand_timings.c
@@ -297,3 +297,14 @@  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 a633fd0..0b9fe3f 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -1183,6 +1183,8 @@  uint8_t nand_read_byte(struct mtd_info *mtd);
 
 /* 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,