Christophe Leroy fc96ec826b spi: fsl-cpm: Use 16 bit mode for large transfers with even size ... On CPM, the RISC core is a lot more efficiant when doing transfers in 16-bits chunks than in 8-bits chunks, but unfortunately the words need to be byte swapped as seen in a previous commit. So, for large tranfers with an even size, allocate a temporary tx buffer and byte-swap data before and after transfer. This change allows setting higher speed for transfer. For instance on an MPC 8xx (CPM1 comms RISC processor), the documentation tells that transfer in byte mode at 1 kbit/s uses 0.200% of CPM load at 25 MHz while a word transfer at the same speed uses 0.032% of CPM load. This means the speed can be 6 times higher in word mode for the same CPM load. For the time being, only do it on CPM1 as there must be a trade-off between the CPM load reduction and the CPU load required to byte swap the data. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Link: https://lore.kernel.org/r/f2e981f20f92dd28983c3949702a09248c23845c.1680371809.git.christophe.leroy@csgroup.eu Signed-off-by: Mark Brown <broonie@kernel.org>		2023-04-05 12:33:34 +01:00
..
accel	- Daniel Verkamp has contributed a memfd series ("mm/memfd: add	2023-02-23 17:09:35 -08:00
accessibility
acpi	More ACPI updates for 6.3-rc1	2023-03-03 10:36:01 -08:00
amba
android	Char/Misc and other driver subsystem changes for 6.3-rc1	2023-02-24 12:47:33 -08:00
ata	ata: ahci: Revert "ata: ahci: Add Tiger Lake UP{3,4} AHCI controller"	2023-03-03 18:43:02 +09:00
atm
auxdisplay
base	A set of updates for the interrupt susbsystem:	2023-03-05 11:19:16 -08:00
bcma
block	block-6.3-2023-03-03	2023-03-03 10:21:39 -08:00
bluetooth
bus	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
cdrom
char	tpm: disable hwrng for fTPM on some AMD designs	2023-03-12 23:28:10 +02:00
clk	We have one small patch to the clk core this time around. It fixes a corner	2023-02-25 15:16:23 -08:00
clocksource	Updates for timekeeping, timers and clockevent/source drivers:	2023-02-21 09:45:13 -08:00
comedi
connector
counter
cpufreq	More power management updates for 6.3-rc1	2023-03-03 10:30:58 -08:00
cpuidle	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
crypto	This push fixes a regression in the caam driver.	2023-03-05 11:32:30 -08:00
cxl	cxl for v6.3	2023-02-25 09:19:23 -08:00
dax	cxl for v6.3	2023-02-25 09:19:23 -08:00
dca
devfreq
dio
dma	dmaengine updates for v6.3	2023-02-24 17:18:54 -08:00
dma-buf	dma-buf: make kobj_type structure constant	2023-02-17 09:16:34 +01:00
edac	- Add a driver for the RAS functionality on Xilinx's on chip memory	2023-02-21 08:10:03 -08:00
eisa
extcon
firewire	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
firmware	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
fpga	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
fsi
gnss
gpio	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
gpu	Merge tag 'amd-drm-fixes-6.3-2023-03-09' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes	2023-03-10 14:17:35 +10:00
greybus
hid	for-linus-2023030901	2023-03-09 10:17:23 -08:00
hsi	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
hte
hv	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
hwmon	- Core Frameworks	2023-02-23 15:03:05 -08:00
hwspinlock
hwtracing	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
i2c	i2c: dev: Fix bus callback return values	2023-03-09 22:07:52 +01:00
i3c	I3C for 6.3	2023-02-28 16:05:01 -08:00
idle	Power management updates for 6.3-rc1	2023-02-21 12:13:58 -08:00
iio	iio: imu: Replace all spi->chip_select and spi->cs_gpiod references with function call	2023-03-11 12:34:03 +00:00
infiniband	v6.3 RDMA pull request	2023-02-24 15:11:03 -08:00
input	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
interconnect	SoC: DT changes for 6.3	2023-02-20 15:49:56 -08:00
iommu	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
ipack	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
irqchip	ARM:	2023-02-25 11:30:21 -08:00
isdn
leds	- Remove Drivers	2023-02-23 15:09:31 -08:00
macintosh	powerpc updates for 6.3	2023-02-25 11:00:06 -08:00
mailbox	mailbox: qcom-apcs-ipc: add IPQ5332 APSS clock support	2023-02-23 14:47:13 -06:00
mcb
md	flexible-array transformations for 6.3-rc1	2023-02-25 12:53:42 -08:00
media	media: i2c: ov2685: convert to i2c's .probe_new()	2023-03-09 21:59:04 +01:00
memory	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
memstick	MMC core:	2023-02-27 09:47:26 -08:00
message
mfd	Including fixes from wireless and netfilter.	2023-02-27 14:05:08 -08:00
misc	misc: ad525x_dpot-i2c: Convert to i2c's .probe_new()	2023-03-09 21:58:45 +01:00
mmc	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
most
mtd	Linux 6.3-rc2	2023-03-13 13:21:01 +00:00
mux
net	Linux 6.3-rc2	2023-03-13 13:21:01 +00:00
nfc	nfc: fdp: add null check of devm_kmalloc_array in fdp_nci_i2c_read_device_properties	2023-02-28 11:48:28 +01:00
ntb
nubus
nvdimm	virtio,vhost,vdpa: features, fixes	2023-02-25 11:48:02 -08:00
nvme	block-6.3-2023-03-03	2023-03-03 10:21:39 -08:00
nvmem
of	IOMMU Updates for Linux v6.3:	2023-02-24 13:40:13 -08:00
opp	OPP: fix error checking in opp_migrate_dentry()	2023-02-16 13:48:53 +01:00
parisc
parport	Char/Misc and other driver subsystem changes for 6.3-rc1	2023-02-24 12:47:33 -08:00
pci	A set of updates for the interrupt susbsystem:	2023-03-05 11:19:16 -08:00
pcmcia	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
peci
perf	RISC-V Patches for the 6.3 Merge Window, Part 2	2023-03-03 09:32:51 -08:00
phy	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
pinctrl	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
platform	Linux 6.3-rc2	2023-03-13 13:21:01 +00:00
pnp
power	power supply changes for the v6.3 series (part 2)	2023-03-03 16:33:28 -08:00
powercap	More power management updates for 6.3-rc1	2023-03-03 10:30:58 -08:00
pps
ps3
ptp	ptp: vclock: use mutex to fix "sleep on atomic" bug	2023-02-22 21:23:48 -08:00
pwm	pwm: dwc: Use devm_pwmchip_add()	2023-02-20 12:26:35 +01:00
rapidio
ras
regulator	regulator: Fixes for v6.3	2023-03-02 09:21:25 -08:00
remoteproc	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
reset
rpmsg	rpmsg updates for v6.3	2023-02-26 12:10:28 -08:00
rtc	RTC for 6.3	2023-03-03 09:15:50 -08:00
s390	SCSI misc on 20230303	2023-03-03 14:41:50 -08:00
sbus
scsi	SCSI fixes on 20230310	2023-03-10 20:45:53 -08:00
sh	sh updates for v6.3	2023-03-01 09:44:22 -08:00
siox
slimbus
soc	ARM: SoC drivers for 6.3	2023-02-27 10:04:49 -08:00
soundwire	soundwire updates for 6.3	2023-02-24 17:29:52 -08:00
spi	spi: fsl-cpm: Use 16 bit mode for large transfers with even size	2023-04-05 12:33:34 +01:00
spmi
ssb
staging	Linux 6.3-rc2	2023-03-13 13:21:01 +00:00
target	scsi: target: iscsi: Fix an error message in iscsi_check_key()	2023-03-06 16:50:42 -05:00
tc
tee	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
thermal	thermal: intel: int340x: processor_thermal: Fix deadlock	2023-03-03 20:34:49 +01:00
thunderbolt	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
tty	serial: sc16is7xx: Convert to i2c's .probe_new()	2023-03-09 21:58:53 +01:00
ufs	scsi: ufs: mcq: qcom: Clean the return path of ufs_qcom_mcq_config_resource()	2023-03-06 18:33:12 -05:00
uio	- Daniel Verkamp has contributed a memfd series ("mm/memfd: add	2023-02-23 17:09:35 -08:00
usb	phy-for-6.3	2023-02-24 17:22:11 -08:00
vdpa	virtio,vhost,vdpa: features, fixes	2023-02-25 11:48:02 -08:00
vfio	VFIO updates for v6.3-rc1	2023-02-25 11:52:57 -08:00
vhost	virtio,vhost,vdpa: features, fixes	2023-02-25 11:48:02 -08:00
video	TTY/Serial driver updates for 6.3-rc1	2023-02-24 12:17:14 -08:00
virt	virt/sev-guest: Return -EIO if certificate buffer is not large enough	2023-03-01 10:17:46 +01:00
virtio	virtio,vhost,vdpa: features, fixes	2023-02-25 11:48:02 -08:00
vlynq
w1	w1: ds2482: Convert to i2c's .probe_new()	2023-03-09 21:58:57 +01:00
watchdog	linux-watchdog 6.3-rc1 tag	2023-03-02 11:12:01 -08:00
xen	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
zorro
Kconfig
Makefile	Kbuild updates for v6.3	2023-02-26 11:53:25 -08:00