From 74d00a8c3849c1340efd713eb94b786e304c201f Mon Sep 17 00:00:00 2001
From: John Crispin <john@phrozen.org>
Date: Sun, 25 Dec 2016 20:11:34 +0100
Subject: kernel: split patches folder up into backport, pending and hack
folders
* properly format/comment all patches
* merge debloat patches
* merge Kconfig patches
* merge swconfig patches
* merge hotplug patches
* drop 200-fix_localversion.patch - upstream
* drop 222-arm_zimage_none.patch - unused
* drop 252-mv_cesa_depends.patch - no longer required
* drop 410-mtd-move-forward-declaration-of-struct-mtd_info.patch - unused
* drop 661-fq_codel_keep_dropped_stats.patch - outdated
* drop 702-phy_add_aneg_done_function.patch - upstream
* drop 840-rtc7301.patch - unused
* drop 841-rtc_pt7c4338.patch - upstream
* drop 921-use_preinit_as_init.patch - unused
* drop spio-gpio-old and gpio-mmc - unused
Signed-off-by: John Crispin <john@phrozen.org>
---
...-m25p80-add-support-for-mmap-read-request.patch | 46 ++++++++++++++++++++++
1 file changed, 46 insertions(+)
create mode 100644 target/linux/generic/pending-4.4/045-mtd-devices-m25p80-add-support-for-mmap-read-request.patch
(limited to 'target/linux/generic/pending-4.4/045-mtd-devices-m25p80-add-support-for-mmap-read-request.patch')
diff --git a/target/linux/generic/pending-4.4/045-mtd-devices-m25p80-add-support-for-mmap-read-request.patch b/target/linux/generic/pending-4.4/045-mtd-devices-m25p80-add-support-for-mmap-read-request.patch
new file mode 100644
index 0000000..c4c7e6e
--- /dev/null
+++ b/target/linux/generic/pending-4.4/045-mtd-devices-m25p80-add-support-for-mmap-read-request.patch
@@ -0,0 +1,46 @@
+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));
+
--
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