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755113d767
linux-next/drivers
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Daniel Lezcano 755113d767 thermal/debugfs: Add thermal cooling device debugfs information 
The thermal framework does not have any debug information except a
sysfs stat which is a bit controversial. This one allocates big chunks
of memory for every cooling devices with a high number of states and
could represent on some systems in production several megabytes of
memory for just a portion of it. As the sysfs is limited to a page
size, the output is not exploitable with large data array and gets
truncated.

The patch provides the same information than sysfs except the
transitions are dynamically allocated, thus they won't show more
events than the ones which actually occurred. There is no longer a
size limitation and it opens the field for more debugging information
where the debugfs is designed for, not sysfs.

The thermal debugfs directory structure tries to stay consistent with
the sysfs one but in a very simplified way:

thermal/
 -- cooling_devices
    |-- 0
    |   |-- clear
    |   |-- time_in_state_ms
    |   |-- total_trans
    |   `-- trans_table
    |-- 1
    |   |-- clear
    |   |-- time_in_state_ms
    |   |-- total_trans
    |   `-- trans_table
    |-- 2
    |   |-- clear
    |   |-- time_in_state_ms
    |   |-- total_trans
    |   `-- trans_table
    |-- 3
    |   |-- clear
    |   |-- time_in_state_ms
    |   |-- total_trans
    |   `-- trans_table
    `-- 4
        |-- clear
        |-- time_in_state_ms
        |-- total_trans
        `-- trans_table

The content of the files in the cooling devices directory is the same
as the sysfs one except for the trans_table which has the following
format:

Transition	Hits
1->0      	246
0->1      	246
2->1      	632
1->2      	632
3->2      	98
2->3      	98

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
[ rjw: White space fixups, rebase ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2024-01-12 15:34:56 +01:00
..
accel accel/ivpu: avoid build failure with CONFIG_PM=n 2023-11-15 11:03:49 +01:00
accessibility
acpi thermal: trip: Send trip change notifications on all trip updates 2023-12-13 12:37:01 +01:00
amba
android Char/Misc and other driver changes for 6.7-rc1 2023-11-03 14:51:08 -10:00
ata ata: pata_gayle: Convert to platform remove callback returning void 2023-11-08 09:00:49 +09:00
atm pci-v6.7-changes 2023-11-02 14:05:18 -10:00
auxdisplay
base regmap: Fix for v6.7 2023-11-07 16:56:10 -08:00
bcma
block nbd: fix uaf in nbd_open 2023-11-07 08:14:57 -07:00
bluetooth Bluetooth: btmtksdio: enable bluetooth wakeup in system suspend 2023-10-23 11:04:51 -07:00
bus SoC driver updates for 6.7 2023-11-01 14:46:51 -10:00
cache riscv: RISCV_NONSTANDARD_CACHE_OPS shouldn't depend on RISCV_DMA_NONCOHERENT 2023-10-26 09:42:37 +02:00
cdrom
cdx Char/Misc and other driver changes for 6.7-rc1 2023-11-03 14:51:08 -10:00
char Char/Misc and other driver changes for 6.7-rc1 2023-11-03 14:51:08 -10:00
clk SoC driver updates for 6.7 2023-11-01 14:46:51 -10:00
clocksource RISC-V Patches for the 6.7 Merge Window, Part 2 2023-11-10 09:23:17 -08:00
comedi
connector Fix NULL pointer dereference in cn_filter() 2023-10-24 10:53:45 +02:00
counter
cpufreq Merge branch 'pm-cpufreq' 2023-11-07 20:45:12 +01:00
cpuidle
crypto crypto: talitos - stop using crypto_ahash::init 2023-10-27 18:04:29 +08:00
cxl cxl/pci: Change CXL AER support check to use native AER 2023-11-02 14:09:01 -07:00
dax Many singleton patches against the MM code. The patch series which are 2023-11-02 19:38:47 -10:00
dca
devfreq
dio
dma dmaengine updates for v6.7 2023-11-03 18:56:51 -10:00
dma-buf As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
dpll
edac hardening updates for v6.7-rc1 2023-10-30 19:09:55 -10:00
eisa
extcon
firewire firewire: Annotate struct fw_node with __counted_by 2023-11-05 21:15:17 +09:00
firmware vhost,virtio,vdpa,firmware: bugfixes 2023-11-16 07:39:37 -05:00
fpga Char/Misc and other driver changes for 6.7-rc1 2023-11-03 14:51:08 -10:00
fsi
gnss
gpio pwm: Changes for v6.7-rc1 2023-11-09 13:47:52 -08:00
gpu drm-fixes for -rc2 2023-11-17 13:58:26 -08:00
greybus greybus: Add BeaglePlay Linux Driver 2023-10-27 13:19:04 +02:00
hid Char/Misc and other driver changes for 6.7-rc1 2023-11-03 14:51:08 -10:00
hsi
hte hte: Changes for v6.7-rc1 2023-10-31 18:32:51 -10:00
hv TTY/Serial changes for 6.7-rc1 2023-11-03 15:44:25 -10:00
hwmon hwmon updates for v6.7-rc1 2023-10-31 17:44:17 -10:00
hwspinlock
hwtracing
i2c i2c: ocores: Move system PM hooks to the NOIRQ phase 2023-11-13 12:43:42 -05:00
i3c I3C for 6.7 2023-11-04 16:25:36 -10:00
idle
iio Char/Misc and other driver changes for 6.7-rc1 2023-11-03 14:51:08 -10:00
infiniband RDMA for v6.7 2023-11-02 15:20:30 -10:00
input Input updates for 6.7 merge window: 2023-11-09 14:18:42 -08:00
interconnect
iommu IOMMU Updates for Linux v6.7 2023-11-09 13:37:28 -08:00
ipack
irqchip - Flush the translation service tables to prevent unpredictable behavior 2023-11-19 13:49:32 -08:00
isdn hardening updates for v6.7-rc1 2023-10-30 19:09:55 -10:00
leds pwm: Changes for v6.7-rc1 2023-11-09 13:47:52 -08:00
macintosh powerpc updates for 6.7 2023-11-03 10:07:39 -10:00
mailbox Moving repo 2023-11-05 18:45:32 -08:00
mcb mcb: fix error handling for different scenarios when parsing 2023-10-21 23:04:02 +02:00
md dm-crypt: start allocating with MAX_ORDER 2023-11-17 14:41:15 -05:00
media media updates for v6.7-rc1 2023-11-06 15:06:06 -08:00
memory IOMMU Updates for Linux v6.7 2023-11-09 13:37:28 -08:00
memstick
message scsi: message: fusion: Initialize return value in mptfc_bus_reset() 2023-10-24 22:36:39 -04:00
mfd - Core Frameworks 2023-11-02 14:40:51 -10:00
misc RISC-V Patches for the 6.7 Merge Window, Part 1 2023-11-08 09:21:18 -08:00
mmc mmc: sdhci-pci-gli: GL9750: Mask the replay timer timeout of AER 2023-11-07 13:08:12 +01:00
most
mtd - removed AR7 platform support 2023-11-10 09:19:46 -08:00
mux
net Including fixes from BPF and netfilter. 2023-11-16 07:51:26 -05:00
nfc
ntb
nubus
nvdimm
nvme nvme: keyring: fix conditional compilation 2023-11-08 08:07:08 -08:00
nvmem Char/Misc and other driver changes for 6.7-rc1 2023-11-03 14:51:08 -10:00
of RISC-V Patches for the 6.7 Merge Window, Part 2 2023-11-10 09:23:17 -08:00
opp
parisc parisc/power: Fix power soft-off when running on qemu 2023-11-18 18:59:30 +01:00
parport parport: gsc: mark init function static 2023-11-10 08:41:23 +01:00
pci cxl for v6.7 2023-11-04 16:20:36 -10:00
pcmcia PCMCIA odd cleanups and fixes for v6.7-rc1 2023-11-07 16:40:42 -08:00
peci
perf arm64 fixes: 2023-11-10 12:22:14 -08:00
phy phy-for-6.6 2023-11-03 19:06:12 -10:00
pinctrl pinctrl: nuvoton: npcm8xx: drop wrappers around pinctrl_gpio_request/free() 2023-11-04 10:23:23 +01:00
platform Major microcode loader restructuring, cleanup and improvements by Thomas 2023-11-04 08:46:37 -10:00
pmdomain SoC driver updates for 6.7 2023-11-01 14:46:51 -10:00
pnp
power USB/Thunderbolt changes for 6.7-rc1 2023-11-03 16:00:42 -10:00
powercap powercap: intel_rapl: Downgrade BIOS locked limits pr_warn() to pr_debug() 2023-10-24 22:07:07 +02:00
pps
ps3
ptp ptp: annotate data-race around q->head and q->tail 2023-11-13 20:51:37 -08:00
pwm pwm: samsung: Fix a bit test in pwm_samsung_resume() 2023-11-10 09:20:48 +01:00
rapidio
ras
regulator regulator: Merge up pending fix 2023-10-30 13:14:27 +00:00
remoteproc
reset reset: Annotate struct reset_control_array with __counted_by 2023-10-24 14:10:04 -07:00
rpmsg rpmsg: virtio: Replace deprecated strncpy with strscpy/_pad 2023-10-23 13:11:07 -06:00
rtc RTC for 6.7 2023-11-05 18:49:40 -08:00
s390 Including fixes from netfilter and bpf. 2023-11-09 17:09:35 -08:00
sbus
scsi Merge branch '6.7/scsi-staging' into 6.7/scsi-fixes 2023-11-14 11:40:40 -05:00
sh sh: Remove superhyway bus support 2023-10-25 16:50:11 +02:00
siox
slimbus
soc powerpc updates for 6.7 2023-11-03 10:07:39 -10:00
soundwire soundwire updates for 6.7 2023-11-03 19:10:41 -10:00
spi spi: Fixes for v6.7 2023-11-10 11:44:38 -08:00
spmi spmi: rename spmi device lookup helper 2023-11-01 10:02:18 +00:00
ssb
staging pwm: Changes for v6.7-rc1 2023-11-09 13:47:52 -08:00
target SCSI misc on 20231102 2023-11-02 15:13:50 -10:00
tc
tee
thermal thermal/debugfs: Add thermal cooling device debugfs information 2024-01-12 15:34:56 +01:00
thunderbolt USB/Thunderbolt changes for 6.7-rc1 2023-11-03 16:00:42 -10:00
tty - removed AR7 platform support 2023-11-10 09:19:46 -08:00
ufs Merge branch '6.7/scsi-staging' into 6.7/scsi-fixes 2023-11-14 11:40:40 -05:00
uio
usb USB/Thunderbolt changes for 6.7-rc1 2023-11-03 16:00:42 -10:00
vdpa vdpa_sim_blk: allocate the buffer zeroed 2023-11-01 09:31:16 -04:00
vfio Char/Misc and other driver changes for 6.7-rc1 2023-11-03 14:51:08 -10:00
vhost vhost,virtio,vdpa,firmware: bugfixes 2023-11-16 07:39:37 -05:00
video fbdev: fsl-diu-fb: mark wr_reg_wa() static 2023-11-10 09:16:02 +01:00
virt configfs-tsm for v6.7 2023-11-04 15:58:13 -10:00
virtio vhost,virtio,vdpa,firmware: bugfixes 2023-11-16 07:39:37 -05:00
w1 nvmem: add explicit config option to read old syntax fixed OF cells 2023-10-21 19:19:06 +02:00
watchdog - removed AR7 platform support 2023-11-10 09:19:46 -08:00
xen xen/events: remove some info_for_irq() calls in pirq handling 2023-11-15 09:51:51 +01:00
zorro
Kconfig - removed AR7 platform support 2023-11-10 09:19:46 -08:00
Makefile - removed AR7 platform support 2023-11-10 09:19:46 -08:00