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Bean Huo 霍斌斌 (beanhuo) 548cd3ab54 mtd: spi-nor: Add quad I/O support for Micron SPI NOR 
This patch adds code which enables Quad I/O mode on Micron SPI NOR flashes.

For Micron SPI NOR flash, enabling or disabling quad I/O protocol can be
done By two methods, which are to use EVCR (Enhanced Volatile
Configuration Register) and the ENTER QUAD I/O MODE command. There is no
difference between these two methods. Unfortunately, for some Micron SPI
NOR flashes, there no ENTER Quad I/O command (35h), such as n25q064. But
for all current Micron SPI NOR, if it support quad I/O mode, using EVCR
definitely be supported. It is a recommended method to enable Quad I/O
mode by EVCR, Quad I/O protocol bit 7. When EVCR bit 7 is reset to 0,
the SPI NOR flash will operate in quad I/O mode.

This patch has been tested on N25Q512A and MT25TL256BAA1ESF. Micron SPI
NOR of spi_nor_ids[] table all support this method.

Signed-off-by: Bean Huo <beanhuo@micron.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
 		2015-01-07 11:33:22 -08:00
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accessibility
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acpi Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-19 14:02:02 -08:00
amba
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android
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ata More ACPI and power management updates for 3.19-rc1 2014-12-18 20:28:33 -08:00
atm
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auxdisplay
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base More ACPI and power management updates for 3.19-rc1 2014-12-18 20:28:33 -08:00
bcma
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block Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2014-12-17 16:03:12 -08:00
bluetooth
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bus
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cdrom
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char
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clk Please consider pulling the clk framework changes toward 3.19. It is 2014-12-20 16:42:36 -08:00
clocksource
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connector
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coresight
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cpufreq Update/Remove soon-to-be-dead email address 2014-12-19 12:56:15 -08:00
cpuidle powerpc updates for 3.19 batch 2 2014-12-19 12:57:45 -08:00
crypto
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dca
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devfreq
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dio
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dma
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dma-buf
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edac
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eisa
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extcon
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firewire
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firmware
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fmc
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gpio
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gpu
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hid
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hsi
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hv
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hwmon Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2014-12-17 10:16:27 -08:00
hwspinlock
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i2c Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2014-12-20 13:52:52 -08:00
ide
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idle
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iio
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infiniband SCSI for-linus on 20141220 2014-12-20 13:42:57 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-12-17 10:06:02 -08:00
iommu Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-19 14:02:02 -08:00
ipack
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irqchip
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isdn
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leds More ACPI and power management updates for 3.19-rc1 2014-12-18 20:28:33 -08:00
lguest
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macintosh macintosh: therm_pm72: delete deprecated driver 2014-12-19 19:32:47 +01:00
mailbox
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mcb
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md
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media More ACPI and power management updates for 3.19-rc1 2014-12-18 20:28:33 -08:00
memory MTD updates for 3.19: 2014-12-17 09:59:26 -08:00
memstick
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message
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mfd
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misc powerpc updates for 3.19 batch 2 2014-12-19 12:57:45 -08:00
mmc More ACPI and power management updates for 3.19-rc1 2014-12-18 20:28:33 -08:00
mtd mtd: spi-nor: Add quad I/O support for Micron SPI NOR 2015-01-07 11:33:22 -08:00
net Main batch of InfiniBand/RDMA changes for 3.19: 2014-12-18 20:10:44 -08:00
nfc More ACPI and power management updates for 3.19-rc1 2014-12-18 20:28:33 -08:00
ntb
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nubus
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of ARM: SoC/iommu configuration for 3.19 2014-12-16 14:53:01 -08:00
oprofile
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parisc
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parport
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pci Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-19 14:02:02 -08:00
pcmcia
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phy More ACPI and power management updates for 3.19-rc1 2014-12-18 20:28:33 -08:00
pinctrl
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platform platform-drivers-x86 for 3.19 2014-12-18 20:24:55 -08:00
pnp
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power More ACPI and power management updates for 3.19-rc1 2014-12-18 20:28:33 -08:00
powercap
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pps
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ps3
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ptp
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pwm pwm: Changes for v3.19-rc1 2014-12-17 10:10:51 -08:00
rapidio
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ras
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regulator
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remoteproc
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reset
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rpmsg
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rtc
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s390
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sbus
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scsi SCSI for-linus on 20141220 2014-12-20 13:42:57 -08:00
sfi
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sh
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sn
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soc
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spi spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM 2014-12-19 15:25:31 +01:00
spmi
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ssb
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staging Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2014-12-19 18:19:19 -08:00
target SCSI for-linus on 20141220 2014-12-20 13:42:57 -08:00
tc
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thermal Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2014-12-19 13:29:20 -08:00
thunderbolt
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tty tty: 8250_omap: Replace CONFIG_PM_RUNTIME with CONFIG_PM 2014-12-19 15:27:58 +01:00
uio
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usb SCSI for-linus on 20141220 2014-12-20 13:42:57 -08:00
uwb
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vfio VFIO updates for v3.19-rc1 2014-12-17 10:44:22 -08:00
vhost vhost/virtio: virtio 1.0 related fixes 2014-12-18 20:50:30 -08:00
video More ACPI and power management updates for 3.19-rc1 2014-12-18 20:28:33 -08:00
virt
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virtio vhost/virtio: virtio 1.0 related fixes 2014-12-18 20:50:30 -08:00
vlynq
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vme
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w1
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watchdog watchdog: imx2_wdt: Fix the argument of watchdog_active() 2014-12-18 16:01:20 +01:00
xen Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus 2014-12-18 05:56:29 -08:00
zorro
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Kconfig
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Makefile
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