[PATCH v2 3/5] mtd: devices: m25p80: add support for mmap read request

[Vignesh R <vigneshr-l0cyMroinI0@public.gmane.org>]

Certain spi controllers may support memory mapped interface to read from
m25p80 type flash devices. This interface provides better read
performance than regular SPI interface.
Call spi_mtd_mmap_read() interface, if supported, to make use of
memory-mapped interface.

Signed-off-by: Vignesh R <vigneshr-l0cyMroinI0@public.gmane.org>
---
 drivers/mtd/devices/m25p80.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 9cd3631170ef..3978bcb513b9 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -133,6 +133,11 @@ static int m25p80_read(struct spi_nor *nor, loff_t from, size_t len,
 	/* convert the dummy cycles to the number of bytes */
 	dummy /= 8;
 
+	if (spi_mmap_read_supported(spi))
+		return spi_mtd_mmap_read(spi, from, len, retlen, buf,
+					 nor->read_opcode,
+					 nor->addr_width, dummy);
+
 	spi_message_init(&m);
 	memset(t, 0, (sizeof t));
 
-- 
2.6.2

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