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Marcelo Schmitt f58872f45c
 spi: Enable controllers to extend the SPI protocol with MOSI idle configuration 
The behavior of an SPI controller data output line (SDO or MOSI or COPI
(Controller Output Peripheral Input) for disambiguation) is usually not
specified when the controller is not clocking out data on SCLK edges.
However, there do exist SPI peripherals that require specific MOSI line
state when data is not being clocked out of the controller.

Conventional SPI controllers may set the MOSI line on SCLK edges then bring
it low when no data is going out or leave the line the state of the last
transfer bit. More elaborated controllers are capable to set the MOSI idle
state according to different configurable levels and thus are more suitable
for interfacing with demanding peripherals.

Add SPI mode bits to allow peripherals to request explicit MOSI idle state
when needed.

When supporting a particular MOSI idle configuration, the data output line
state is expected to remain at the configured level when the controller is
not clocking out data. When a device that needs a specific MOSI idle state
is identified, its driver should request the MOSI idle configuration by
setting the proper SPI mode bit.

Acked-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Tested-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Link: https://patch.msgid.link/9802160b5e5baed7f83ee43ac819cb757a19be55.1720810545.git.marcelo.schmitt@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
History 2024-07-29 01:19:51 +01:00
..
accel Merge tag 'drm-habanalabs-next-2024-06-23' of https://github.com/HabanaAI/drivers.accel.habanalabs.kernel into drm-next 2024-06-28 09:41:04 +10:00
accessibility Char/Misc bugfix for 6.10-rc1 2024-05-24 08:43:25 -07:00
acpi RISC-V Patches for the 6.11 Merge Window, Part 2 2024-07-27 10:14:34 -07:00
amba driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
android binder: fix hang of unregistered readers 2024-07-12 11:31:37 +02:00
ata Char/Misc and other driver changes for 6.11-rc1 2024-07-19 15:55:08 -07:00
atm atm/fore200e: Delete unused 'fore200e_boards' 2024-05-06 18:26:47 -07:00
auxdisplay auxdisplay updates for v6.11 2024-07-26 11:04:28 -07:00
base regmap: Fix for v6.11 2024-07-27 12:26:09 -07:00
bcma driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
block block-6.11-20240726 2024-07-27 15:28:53 -07:00
bluetooth virtio: features, fixes, cleanups 2024-07-19 11:57:55 -07:00
bus Devicetree fixes for 6.11, part 1 2024-07-27 12:46:16 -07:00
cache cache: Add StarFive StarLink cache management 2024-05-28 12:34:11 +01:00
cdrom sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-24 20:59:29 +02:00
cdx driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
char sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-24 20:59:29 +02:00
clk Devicetree fixes for 6.11, part 1 2024-07-27 12:46:16 -07:00
clocksource of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
comedi Merge 6.9-rc5 into char-misc-next 2024-04-23 13:16:03 +02:00
connector connector/cn_proc: revert "connector: Fix proc_event_num_listeners count not cleared" 2024-02-13 11:15:44 +01:00
counter Char/Misc and other driver changes for 6.11-rc1 2024-07-19 15:55:08 -07:00
cpufreq Power management updates for 6.11-rc1 2024-07-16 15:54:03 -07:00
cpuidle cpuidle: teo: Don't count non-existent intercepts 2024-07-01 18:58:55 +02:00
crypto ARM: 2024-07-20 12:41:03 -07:00
cxl CXL for v6.11 merge window 2024-07-28 09:33:28 -07:00
dax Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
dca Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
devfreq PM / devfreq: exynos: Use DEFINE_SIMPLE_DEV_PM_OPS for PM functions 2024-05-09 00:30:37 +09:00
dio dio: Have dio_bus_match() callback take a const * 2024-07-10 15:38:14 +02:00
dma Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
dma-buf - 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
dpll dpll: fix return value check for kmemdup 2024-05-13 16:53:53 -07:00
edac minmax: add a few more MIN_T/MAX_T users 2024-07-28 13:41:14 -07:00
eisa driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
extcon extcon: adc-jack: Document missing struct members 2024-05-09 01:03:39 +09:00
firewire Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
firmware RISC-V Patches for the 6.11 Merge Window, Part 2 2024-07-27 10:14:34 -07:00
fpga Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
fsi Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
gnss treewide, serdev: change receive_buf() return type to size_t 2024-01-27 18:13:53 -08:00
gpio gpio fixes for v6.11-rc1 2024-07-27 12:54:06 -07:00
gpu minmax: add a few more MIN_T/MAX_T users 2024-07-28 13:41:14 -07:00
greybus Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
hid Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
hsi Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
hte hte: tegra-194: add missing MODULE_DESCRIPTION() macro 2024-06-19 12:24:03 -07:00
hv Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
hwmon Char/Misc and other driver changes for 6.11-rc1 2024-07-19 15:55:08 -07:00
hwspinlock hwspinlock: qcom: implement bust operation 2024-05-29 12:52:26 -07:00
hwtracing Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
i2c Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
i3c I3C for 6.11 2024-07-27 10:53:06 -07:00
idle intel_idle: Switch to new Intel CPU model defines 2024-06-07 20:35:54 +02:00
iio of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
infiniband IOMMU Updates for Linux v6.11 2024-07-19 09:59:58 -07:00
input Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
interconnect Char/Misc and other driver changes for 6.11-rc1 2024-07-19 15:55:08 -07:00
iommu IOMMU Fixes for Linux v6.11-rc1 2024-07-27 12:39:55 -07:00
ipack driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
irqchip of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
isdn mISDN: Fix a use after free in hfcmulti_tx() 2024-07-25 08:05:05 -07:00
leds - Core Frameworks 2024-07-17 17:51:30 -07:00
macintosh sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-25 12:58:36 -07:00
mailbox mailbox: mtk-cmdq: Move devm_mbox_controller_register() after devm_pm_runtime_enable() 2024-07-19 21:25:23 -05:00
mcb Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
md minmax: add a few more MIN_T/MAX_T users 2024-07-28 13:41:14 -07:00
media a couple of leaks on failure exits missing fdput() 2024-07-26 10:26:33 -07:00
memory memory: fsl_ifc: Make FSL_IFC config visible and selectable 2024-06-12 10:17:37 +02:00
memstick Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
message SCSI misc on 20240514 2024-05-14 18:25:53 -07:00
mfd Devicetree fixes for 6.11, part 1 2024-07-27 12:46:16 -07:00
misc Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
mmc Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
most Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
mtd This pull request contains updates (actually, just fixes) for UBI and UBIFS: 2024-07-28 11:51:51 -07:00
mux mux: remove usage of the deprecated ida_simple_xx() API 2024-04-29 08:20:07 -07:00
net minmax: add a few more MIN_T/MAX_T users 2024-07-28 13:41:14 -07:00
nfc nfc: Drop explicit initialization of struct i2c_device_id::driver_data to 0 2024-06-20 19:28:31 -07:00
ntb Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
nubus nubus: Make nubus_bus_type static and constant 2024-01-03 13:33:59 +01:00
nvdimm Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
nvme nvme fixes for Linux 6.11 2024-07-26 08:06:15 -06:00
nvmem Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
of IOMMU Updates for Linux v6.11 2024-07-19 09:59:58 -07:00
opp Merge branches 'pm-opp' and 'pm-tools' 2024-07-15 18:55:14 +02:00
parisc change alloc_pages name in dma_map_ops to avoid name conflicts 2024-04-25 20:55:53 -07:00
parport sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-25 12:58:36 -07:00
pci Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
pcmcia Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
peci Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
perf RISC-V Patches for the 6.11 Merge Window, Part 2 2024-07-27 10:14:34 -07:00
phy phy-for-6.11 2024-07-24 13:11:28 -07:00
pinctrl of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
platform Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
pmdomain mdomain: Merge branch fixes into next 2024-07-09 13:12:41 +02:00
pnp driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
power power supply and reset changes for the 6.11 series 2024-07-23 09:38:27 -07:00
powercap powercap: idle_inject: Simplify if condition 2024-06-07 20:57:20 +02:00
pps Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
ps3 driver/ps3: Include <video/cmdline.h> for mode parsing 2023-02-20 14:56:51 +01:00
ptp Networking changes for 6.11. Not much excitement - a handful of large 2024-07-16 19:28:34 -07:00
pwm of: remove internal arguments from of_property_for_each_u32() 2024-07-25 06:53:47 -05:00
rapidio driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
ras - The AMD memory controllers data fabric version 4.5 supports 2024-07-15 18:20:24 -07:00
regulator regulator: Fixes for v6.11 2024-07-27 12:27:52 -07:00
remoteproc rpmsg updates for v6.11 2024-07-23 13:41:59 -07:00
reset Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
rpmsg Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
rtc rtc: stm32: add new st,stm32mp25-rtc compatible and check RIF configuration 2024-07-10 17:15:33 +02:00
s390 more s390 updates for 6.11 merge window 2024-07-26 10:47:53 -07:00
sbus sbus: add missing MODULE_DESCRIPTION() macros 2024-07-11 15:42:03 +02:00
scsi Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
sh driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
siox Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
slimbus Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
soc Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
soundwire Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
spi spi: Enable controllers to extend the SPI protocol with MOSI idle configuration 2024-07-29 01:19:51 +01:00
spmi Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
ssb driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
staging Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
target block: remove the blk_integrity_profile structure 2024-06-14 10:20:06 -06:00
tc driver core: have match() callback in struct bus_type take a const * 2024-07-03 15:16:54 +02:00
tee Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
thermal thermal: core: Back off when polling thermal zones on errors 2024-07-24 12:40:23 +02:00
thunderbolt Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
tty Devicetree fixes for 6.11, part 1 2024-07-27 12:46:16 -07:00
ufs SCSI misc on 20240718 2024-07-19 10:56:58 -07:00
uio uio: add missing MODULE_DESCRIPTION() macros 2024-06-04 17:39:12 +02:00
usb Devicetree fixes for 6.11, part 1 2024-07-27 12:46:16 -07:00
vdpa Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
vfio Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
vhost virtio: features, fixes, cleanups 2024-07-19 11:57:55 -07:00
video - 875fa64577da ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
virt ARM: 2024-07-20 12:41:03 -07:00
virtio Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
w1 w1: Drop allocation error message 2024-05-28 17:45:02 +02:00
watchdog linux-watchdog 6.11-rc1 tag 2024-07-25 10:18:35 -07:00
xen Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
zorro Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
Kconfig - removed AR7 platform support 2023-11-10 09:19:46 -08:00
Makefile kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00