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

From: Vignesh R
Date: Tue Nov 03 2015 - 05:07:12 EST

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@xxxxxx>
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);
memset(t, 0, (sizeof t));


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