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8a09054f3e
linux/drivers
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Ahmad Fatoum 8a09054f3e iio: adc: stm32-adc: enable timestamping for non-DMA usage 
For non-DMA usage, we have an easy way to associate a timestamp with a
sample: iio_pollfunc_store_time stores a timestamp in the primary
trigger IRQ handler and stm32_adc_trigger_handler runs in the IRQ thread
to push out the buffer along with the timestamp.

For this to work, the driver needs to register an IIO_TIMESTAMP channel.
Do this.

For DMA, it's not as easy, because we don't push the buffers out of
stm32_adc_trigger, but out of stm32_adc_dma_buffer_done, which runs in
a tasklet scheduled after a DMA completion.

Preferably, the DMA controller would copy us the timestamp into that buffer
as well. Until this is implemented, restrict timestamping support to
only PIO. For low-frequency sampling, PIO is probably good enough.

Cc: Holger Assmann <has@pengutronix.de>
Acked-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.kernel.org/r/20210125194824.30549-1-a.fatoum@pengutronix.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2021-03-11 20:46:57 +00:00
..
accessibility Char/Misc driver patches for 5.12-rc1 2021-02-24 10:25:37 -08:00
acpi Additional ACPI updates for v5.12-rc1 2021-02-25 12:03:13 -08:00
amba
android
ata
atm atm: idt77252: fix build broken on amd64 2021-02-15 12:36:27 -08:00
auxdisplay treewide: Miguel has moved 2021-02-26 09:41:03 -08:00
base PM: runtime: Update device status before letting suppliers suspend 2021-03-01 17:40:38 +01:00
bcma
block rsxx: Return -EFAULT if copy_to_user() fails 2021-03-03 06:48:44 -07:00
bluetooth TTY/Serial driver changes for 5.12-rc1 2021-02-20 21:28:04 -08:00
bus Char/Misc driver patches for 5.12-rc1 2021-02-24 10:25:37 -08:00
cdrom
char tpmdd updates for Linux v5.12-rc2 2021-03-04 12:51:57 -08:00
clk RISC-V Patches for the 5.12 Merge Window 2021-02-26 10:28:35 -08:00
clocksource A small set of clockevent fixes which fell through the cracks 2021-02-22 14:11:36 -08:00
connector
counter counter: 104-quad-8: Remove IIO counter ABI 2021-03-11 20:46:56 +00:00
cpufreq Simple Firmware Interface (SFI) support removal for v5.12-rc1 2021-02-24 10:35:29 -08:00
cpuidle
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2021-02-21 17:23:56 -08:00
cxl cxl/mem: Fix potential memory leak 2021-02-22 14:44:39 -08:00
dax Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2021-02-27 08:07:12 -08:00
dca
devfreq Merge branches 'pm-devfreq' and 'pm-tools' 2021-02-15 17:02:04 +01:00
dio
dma dmaengine updates for v5.12-rc1 2021-02-23 15:05:10 -08:00
dma-buf dma-fence: allow signaling drivers to set fence timestamp 2021-02-24 21:05:28 +05:30
edac Merge branch 'edac-misc' into edac-updates-for-v5.12 2021-02-15 10:06:58 +01:00
eisa
extcon
firewire
firmware Char/Misc driver patches for 5.12-rc1 2021-02-24 10:25:37 -08:00
fpga
fsi
gnss
gpio Driver core / debugfs update for 5.12-rc1 2021-02-24 10:13:55 -08:00
gpu Merge tag 'amd-drm-fixes-5.12-2021-03-03' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes 2021-03-05 11:13:22 +10:00
greybus
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2021-02-23 14:52:22 -08:00
hsi
hv mm/memory_hotplug: MEMHP_MERGE_RESOURCE -> MHP_MERGE_RESOURCE 2021-02-26 09:41:00 -08:00
hwmon Devicetree updates for v5.12: 2021-02-22 10:05:12 -08:00
hwspinlock
hwtracing ARM updates for 5.12-rc1: 2021-02-22 14:27:07 -08:00
i2c i2c: exynos5: Preserve high speed master code 2021-02-26 11:47:42 +01:00
i3c I3C for 5.12 2021-02-22 09:52:55 -08:00
ide ide-5.11-2021-02-28 2021-02-28 15:48:25 -08:00
idle
iio iio: adc: stm32-adc: enable timestamping for non-DMA usage 2021-03-11 20:46:57 +00:00
infiniband RDMA/rxe: Fix errant WARN_ONCE in rxe_completer() 2021-03-05 14:15:22 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2021-02-23 14:56:23 -08:00
interconnect
iommu IOMMU Fixes for Linux v5.12-rc1 2021-03-05 12:26:24 -08:00
ipack
irqchip irqchip updates for Linux 5.12: 2021-02-15 15:41:56 +01:00
isdn
leds Updates for 5.12-rc1. Besides usual fixes and new drivers, we are 2021-02-26 13:56:40 -08:00
lightnvm lightnvm: pblk: Replace guid_copy() with export_guid()/import_guid() 2021-02-14 21:27:24 -07:00
macintosh
mailbox mailbox: arm_mhuv2: Skip calling kfree() with invalid pointer 2021-02-22 13:34:27 -06:00
mcb
md Fix DM verity target's optional Forward Error Correction (FEC) for 2021-03-05 13:25:23 -08:00
media Fixes around VM_FPNMAP and follow_pfn 2021-02-22 17:45:02 -08:00
memory Char/Misc driver patches for 5.12-rc1 2021-02-24 10:25:37 -08:00
memstick
message
mfd Simple Firmware Interface (SFI) support removal for v5.12-rc1 2021-02-24 10:35:29 -08:00
misc pci-v5.12-changes 2021-02-25 09:56:08 -08:00
mmc Merge branch 'stable/for-linus-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb 2021-02-26 13:59:32 -08:00
most
mtd This pull request contains changes (actually just fixes) for UBIFS 2021-02-21 13:57:08 -08:00
mux
net xen: branch for v5.12-rc2 2021-03-04 11:24:47 -08:00
nfc Char/Misc driver patches for 5.12-rc1 2021-02-24 10:25:37 -08:00
ntb NTB: Add support for EPF PCI Non-Transparent Bridge 2021-02-23 14:12:53 -06:00
nubus
nvdimm libnvdimm + device-dax for 5.12 2021-02-24 09:35:54 -08:00
nvme nvmet: model_number must be immutable once set 2021-03-05 13:41:03 +01:00
nvmem
of Char/Misc driver patches for 5.12-rc1 2021-02-24 10:25:37 -08:00
opp opp: Don't skip freq update for different frequency 2021-02-18 12:31:08 +05:30
parisc
parport
pci pci-v5.12-changes 2021-02-25 09:56:08 -08:00
pcmcia Merge branch 'pcmcia-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux 2021-02-26 13:54:43 -08:00
perf IOMMU Updates for Linux v5.12 2021-02-22 10:31:29 -08:00
phy
pinctrl RISC-V Patches for the 5.12 Merge Window 2021-02-26 10:28:35 -08:00
platform Additional ACPI updates for v5.12-rc1 2021-02-25 12:03:13 -08:00
pnp
power
powercap powercap/drivers/dtpm: Add the experimental label to the option description 2021-03-01 17:43:29 +01:00
pps
ps3
ptp ptp: ptp_clockmatrix: clean-up - parenthesis around a == b are unnecessary 2021-02-17 13:49:26 -08:00
pwm pwm: Changes for v5.12-rc1 2021-02-25 12:23:49 -08:00
rapidio
ras
regulator - Core Frameworks 2021-02-22 09:29:42 -08:00
remoteproc remoteproc: qcom: pas: Add SM8350 PAS remoteprocs 2021-02-11 12:52:18 -06:00
reset RISC-V Patches for the 5.12 Merge Window 2021-02-26 10:28:35 -08:00
rpmsg
rtc Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2021-02-27 08:07:12 -08:00
s390 Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2021-02-27 08:07:12 -08:00
sbus
scsi scsi: iscsi: Verify lengths on passthrough PDUs 2021-03-04 20:09:51 -05:00
sh
siox
slimbus
soc OpenRISC updates for 5.12 2021-02-26 14:16:06 -08:00
soundwire ALSA: hda: move Intel SoundWire ACPI scan to dedicated module 2021-03-02 15:33:00 +01:00
spi powerpc updates for 5.12 2021-02-22 14:34:00 -08:00
spmi spmi: spmi-pmic-arb: Fix hw_irq overflow 2021-02-12 12:26:46 +01:00
ssb
staging staging: unisys: visornic: Fix repeated words in comments 2021-03-10 09:25:33 +01:00
target SCSI misc on 20210228 2021-02-28 11:51:20 -08:00
tc
tee
thermal - Use the newly introduced 'hot' and 'critical' ops for the acpi 2021-02-22 09:39:11 -08:00
thunderbolt
tty Char/Misc driver patches for 5.12-rc1 2021-02-24 10:25:37 -08:00
uio
usb Kbuild updates for v5.12 2021-02-25 10:17:31 -08:00
vdpa vdpa/mlx5: fix param validation in mlx5_vdpa_get_config() 2021-02-23 07:52:59 -05:00
vfio VFIO updates for v5.12-rc1 2021-02-24 10:43:40 -08:00
vhost virtio: features, fixes 2021-02-25 12:21:08 -08:00
video drm fixes for 5.12-rc1 + msm-next 2021-02-25 12:10:22 -08:00
virt
virtio Merge branch 'akpm' (patches from Andrew) 2021-02-26 09:50:09 -08:00
visorbus
vlynq
vme
w1
watchdog Char/Misc driver patches for 5.12-rc1 2021-02-24 10:25:37 -08:00
xen xen: branch for v5.12-rc1 2021-02-26 10:04:45 -08:00
zorro
Kconfig cxl/mem: Introduce a driver for CXL-2.0-Type-3 endpoints 2021-02-16 20:36:38 -08:00
Makefile Simple Firmware Interface (SFI) support removal for v5.12-rc1 2021-02-24 10:35:29 -08:00