diff options
Diffstat (limited to 'target/linux/generic/patches-4.4/045-mtd-devices-m25p80-add-support-for-mmap-read-request.patch')
| -rw-r--r-- | target/linux/generic/patches-4.4/045-mtd-devices-m25p80-add-support-for-mmap-read-request.patch | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/target/linux/generic/patches-4.4/045-mtd-devices-m25p80-add-support-for-mmap-read-request.patch b/target/linux/generic/patches-4.4/045-mtd-devices-m25p80-add-support-for-mmap-read-request.patch deleted file mode 100644 index c4c7e6e..0000000 --- a/target/linux/generic/patches-4.4/045-mtd-devices-m25p80-add-support-for-mmap-read-request.patch +++ /dev/null @@ -1,46 +0,0 @@ -From 08922f644878c9163ada8df3ef9def89be1d5e90 Mon Sep 17 00:00:00 2001 -From: Vignesh R <vigneshr@ti.com> -Date: Tue, 29 Mar 2016 11:16:17 +0530 -Subject: [PATCH] mtd: devices: m25p80: add support for mmap read request - -Certain SPI controllers may provide accelerated hardware interface to -read from m25p80 type flash devices in order to provide better read -performance. SPI core supports such devices with spi_flash_read() API. -Call spi_flash_read(), if supported, to make use of such interface. - -Signed-off-by: Vignesh R <vigneshr@ti.com> -[Brian: add memset()] -Signed-off-by: Brian Norris <computersforpeace@gmail.com> ---- - ---- a/drivers/mtd/devices/m25p80.c -+++ b/drivers/mtd/devices/m25p80.c -@@ -131,6 +131,28 @@ static int m25p80_read(struct spi_nor *n - /* convert the dummy cycles to the number of bytes */ - dummy /= 8; - -+ if (spi_flash_read_supported(spi)) { -+ struct spi_flash_read_message msg; -+ int ret; -+ -+ memset(&msg, 0, sizeof(msg)); -+ -+ msg.buf = buf; -+ msg.from = from; -+ msg.len = len; -+ msg.read_opcode = nor->read_opcode; -+ msg.addr_width = nor->addr_width; -+ msg.dummy_bytes = dummy; -+ /* TODO: Support other combinations */ -+ msg.opcode_nbits = SPI_NBITS_SINGLE; -+ msg.addr_nbits = SPI_NBITS_SINGLE; -+ msg.data_nbits = m25p80_rx_nbits(nor); -+ -+ ret = spi_flash_read(spi, &msg); -+ *retlen = msg.retlen; -+ return ret; -+ } -+ - spi_message_init(&m); - memset(t, 0, (sizeof t)); - |