[PATCH 3/5] mtd: devices: m25p80: add support for mmap read request
From: vigneshr@ti.com (Vignesh R)
Date: 2015-09-04 08:31:55
Also in:
linux-devicetree, linux-omap, linux-spi, lkml
Subsystem:
memory technology devices (mtd), the rest · Maintainers:
Miquel Raynal, Richard Weinberger, Vignesh Raghavendra, Linus Torvalds
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() function, if available, to make use of memory-mapped interface. Signed-off-by: Vignesh R <vigneshr@ti.com> --- drivers/mtd/devices/m25p80.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index d313f948b96c..b8b391aab331 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c@@ -133,6 +133,14 @@ 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->master->spi_mtd_mmap_read) { + return spi->master->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));
--
2.5.1