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Linus Walleij 9d3b5086f6 mtd: physmap_of_gemini: Handle pin control 
This enables the complex mapping for the Gemini and kicks in
custom read/write functions that will wrap the existing
simple functions in calls to enable/disable the parallel
flash pins using pin controls.

This is necessary on some hardware such as the D-Link
DIR-685 where all flash pins are patched in/out at the same
time, but some of the flash pins are in practice unused by
the flash and have anyway been reused as GPIO.

This concerns specifically CE1 on the Gemini. There is only
one flash chip, so only CE0 is used, and the line for CE1
has been reused as chip select for the emulated SPI port
connected to the display. If we try to use the same lines
for flash and GPIO at the same time, one of them will loose:
the GPIO line will disappear because it gets disconnected
from the pin when the flash group is muxed out.

Fix this by introducing two pin control states named simply
"enabled" and "disabled" and only enable the flash lines
when absolutely necessary (during read/write/copy). This
way, they are available for GPIO at all other times and
the display works.

Collect all the state variables in a struct named
struct gemini_flash and allocate this struct at probe
time.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
 		2018-12-06 16:57:13 +01:00
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accessibility
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acpi pwm: Changes for v4.20-rc1 2018-11-02 11:22:45 -07:00
amba
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android
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ata libata: Apply NOLPM quirk for SAMSUNG MZ7TD256HAFV-000L9 2018-10-26 08:21:04 -06:00
atm atm: zatm: Fix empty body Clang warnings 2018-10-18 15:39:10 -07:00
auxdisplay The Compiler Attributes series 2018-11-01 18:34:46 -07:00
base mm/memory_hotplug: fix online/offline_pages called w.o. mem_hotplug_lock 2018-10-31 08:54:17 -07:00
bcma
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block for-linus-20181102 2018-11-02 11:25:48 -07:00
bluetooth Merge branch 'work.tty-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-10-24 14:43:41 +01:00
bus ARM: SoC driver updates for 4.17 2018-10-29 15:16:01 -07:00
cdrom gdrom: fix mistake in assignment of error 2018-10-25 11:17:40 -06:00
char RTC for 4.20 2018-10-27 09:24:24 -07:00
clk This time it looks like a quieter release cycle in the clk tree. I guess that's 2018-10-31 11:08:30 -07:00
clocksource Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-11-04 08:15:15 -08:00
connector
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cpufreq cpufreq: remove unused arm_big_little_dt driver 2018-10-25 18:39:02 +02:00
cpuidle More power management updates for 4.20-rc1 2018-10-30 09:08:07 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-10-25 16:43:35 -07:00
dax
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dca
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devfreq
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dio
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dma pci-v4.20-changes 2018-10-25 06:50:48 -07:00
dma-buf
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edac * skx_edac: Address translation for NVDIMMs (Tony Luck and Qiuxu Zhuo) 2018-11-02 11:17:22 -07:00
eisa
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extcon
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firewire
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firmware Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-11-03 18:25:17 -07:00
fmc
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fpga fpga: add devm_fpga_region_create 2018-10-16 11:13:50 +02:00
fsi iov_iter: Separate type from direction and use accessor functions 2018-10-24 00:41:07 +01:00
gnss
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gpio pci-v4.20-changes 2018-10-25 06:50:48 -07:00
gpu drm, i915, amdgpu, bridge + core quirk 2018-11-02 10:58:20 -07:00
hid platform-drivers-x86 for v4.20-1 2018-11-01 08:42:21 -07:00
hsi
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hv hv_balloon: Replace spin_is_locked() with lockdep 2018-10-15 20:54:17 +02:00
hwmon Lots of small changes to the IPMI driver. Most of the changes 2018-10-23 09:42:05 +01:00
hwspinlock
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hwtracing
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i2c i2c: Clear client->irq in i2c_device_remove 2018-10-31 23:33:34 +00:00
ide
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idle Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-10-23 13:32:18 +01:00
iio Staging/IIO patches for 4.20-rc1 2018-10-29 10:38:10 -07:00
infiniband Revert "mm, mmu_notifier: annotate mmu notifiers with blockable invalidate callbacks" 2018-10-26 16:25:19 -07:00
input Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax 2018-10-28 11:35:40 -07:00
iommu mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
ipack
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irqchip irqchip/irq-mvebu-sei: Fix a NULL vs IS_ERR() bug in probe function 2018-11-01 12:38:48 +01:00
isdn Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-11-01 19:58:52 -07:00
leds leds: gpio: set led_dat->gpiod pointer for OF defined GPIO leds 2018-10-26 20:51:36 +02:00
lightnvm
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macintosh memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
mailbox - Convert print users to use the %pOFn format specifier 2018-10-29 10:30:44 -07:00
mcb
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md for-linus-20181102 2018-11-02 11:25:48 -07:00
media media updates for v4.20-rc1 2018-10-31 10:53:29 -07:00
memory
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memstick
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message
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mfd chrome-platform for v4.20 2018-10-31 16:47:55 -07:00
misc Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-11-01 19:58:52 -07:00
mmc Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-10-23 13:32:18 +01:00
mtd mtd: physmap_of_gemini: Handle pin control 2018-12-06 16:57:13 +01:00
mux This is the bulk of GPIO changes for the v4.20 series: 2018-10-23 08:45:05 +01:00
net NTB IDT thermal changes and hook into hwmon, ntb_netdev clean-up of 2018-11-04 08:12:44 -08:00
nfc NFC: nfcmrvl_uart: fix OF child-node lookup 2018-10-23 13:28:53 -05:00
ntb ntb: idt: Alter the driver info comments 2018-11-01 10:33:12 -04:00
nubus
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nvdimm libnvdimm for 4.20 2018-10-25 06:31:56 -07:00
nvme for-linus-20181102 2018-11-02 11:25:48 -07:00
nvmem nvmem: hide unused nvmem_find_cell_by_index function 2018-10-15 15:56:15 +02:00
of Devicetree fixes for v4.20-rc1: 2018-11-01 14:45:38 -07:00
opp
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oprofile
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parisc parisc: Add alternative coding infrastructure 2018-10-17 17:22:26 +02:00
parport
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pci Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax 2018-10-28 11:35:40 -07:00
pcmcia powerpc updates for 4.20 2018-10-26 14:36:21 -07:00
perf arm64 updates for 4.20: 2018-10-22 17:30:06 +01:00
phy USB/PHY patches for 4.20-rc1 2018-10-26 08:14:13 -07:00
pinctrl This is the bulk of GPIO changes for the v4.20 series: 2018-10-23 08:45:05 +01:00
platform platform-drivers-x86 for v4.20-1 2018-11-01 08:42:21 -07:00
pnp
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power Devicetree updates for 4.20: 2018-10-26 12:09:58 -07:00
powercap Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-10-23 13:32:18 +01:00
pps
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ps3
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ptp ptp: drop redundant kasprintf() to create worker name 2018-10-28 19:20:06 -07:00
pwm pwm: lpss: Only set update bit if we are actually changing the settings 2018-10-16 13:16:15 +02:00
rapidio
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ras
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regulator regulator: Regulator updates for next release 2018-10-23 01:54:44 +01:00
remoteproc remoteproc: qcom: q6v5-mss: Register segments/dumpfn for coredump 2018-10-19 12:54:03 -07:00
reset ARM: SoC driver updates for 4.17 2018-10-29 15:16:01 -07:00
rpmsg
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rtc rtc: sc27xx: Always read normal alarm when registering RTC device 2018-10-25 02:35:42 +02:00
s390 mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
sbus
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scsi Kbuild updates for v4.20 (2nd) 2018-11-03 10:47:33 -07:00
sfi mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
sh
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siox
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slimbus
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sn
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soc soc: ti: QMSS: Fix usage of irq_set_affinity_hint 2018-11-02 11:22:09 -07:00
soundwire
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spi - New Drivers 2018-10-25 06:19:15 -07:00
spmi
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ssb
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staging media updates for v4.20-rc1 2018-10-31 10:53:29 -07:00
target SCSI misc on 20181102 2018-11-03 10:34:03 -07:00
tc
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tee
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thermal Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2018-10-31 11:28:12 -07:00
thunderbolt
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tty mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
uio
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usb Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-11-01 19:58:52 -07:00
uwb
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vfio VFIO updates for v4.20 2018-10-31 11:01:38 -07:00
vhost virtio, vhost: fixes, tweaks 2018-11-01 14:42:49 -07:00
video fbdev changes for v4.20: 2018-10-31 11:41:37 -07:00
virt
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virtio virtio-balloon: VIRTIO_BALLOON_F_PAGE_POISON 2018-10-24 20:57:55 -04:00
visorbus
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vlynq
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vme
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w1 w1: IAD Register is yet readable trough iad sys file. Fix snprintf (%u for unsigned, count for max size). 2018-10-15 20:50:32 +02:00
watchdog watchdog: ts4800: release syscon device node in ts4800_wdt_probe() 2018-10-22 10:16:28 +02:00
xen Merge branch 'work.afs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-11-01 19:58:52 -07:00
zorro
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Kconfig
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Makefile
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