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v6.6.99
linux-yocto/drivers/regulator
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Heiko Stuebner 7b9203afeb regulator: fan53555: add enable_time support and soft-start times 
[ Upstream commit 8acfb165a4 ]

The datasheets for all the fan53555 variants (and clones using the same
interface) define so called soft start times, from enabling the regulator
until at least some percentage of the output (i.e. 92% for the rk860x
types) are available.

The regulator framework supports this with the enable_time property
but currently the fan53555 driver does not define enable_times for any
variant.

I ran into a problem with this while testing the new driver for the
Rockchip NPUs (rocket), which does runtime-pm including disabling and
enabling a rk8602 as needed. When reenabling the regulator while running
a load, fatal hangs could be observed while enabling the associated
power-domain, which the regulator supplies.

Experimentally setting the regulator to always-on, made the issue
disappear, leading to the missing delay to let power stabilize.
And as expected, setting the enable-time to a non-zero value
according to the datasheet also resolved the regulator-issue.

The datasheets in nearly all cases only specify "typical" values,
except for the fan53555 type 08. There both a typical and maximum
value are listed - 40uS apart.

For all typical values I've added 100uS to be on the safe side.
Individual details for the relevant regulators below:

- fan53526:
  The datasheet for all variants lists a typical value of 150uS, so
  make that 250uS with safety margin.
- fan53555:
  types 08 and 18 (unsupported) are given a typical enable time of 135uS
  but also a maximum of 175uS so use that value. All the other types only
  have a typical time in the datasheet of 300uS, so give a bit margin by
  setting it to 400uS.
- rk8600 + rk8602:
  Datasheet reports a typical value of 260us, so use 360uS to be safe.
- syr82x + syr83x:
  All datasheets report typical soft-start values of 300uS for these
  regulators, so use 400uS.
- tcs452x:
  Datasheet sadly does not report a soft-start time, so I've not set
  an enable-time

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patch.msgid.link/20250606190418.478633-1-heiko@sntech.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-07-10 16:03:16 +02:00
..
88pg86x.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
88pm800-regulator.c
88pm8607.c
aat2870-regulator.c
ab8500-ext.c
ab8500.c
act8865-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
act8945a-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
ad5398.c regulator: ad5398: Add device tree support 2025-06-04 14:42:15 +02:00
anatop-regulator.c
arizona-ldo1.c
arizona-micsupp.c
as3711-regulator.c
as3722-regulator.c
atc260x-regulator.c regulator: Use bitfield values for range selectors 2023-07-25 12:14:27 +01:00
aw37503-regulator.c regulator: aw37503: Switch back to use struct i2c_driver's .probe() 2023-08-24 21:43:28 +01:00
axp20x-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
bcm590xx-regulator.c
bd718x7-regulator.c regulator: Use bitfield values for range selectors 2023-07-25 12:14:27 +01:00
bd9571mwv-regulator.c
bd9576-regulator.c
bd71815-regulator.c regulator: bd71815: fix ramp values 2024-06-27 13:49:09 +02:00
bd71828-regulator.c regulator: bd71828: Don't overwrite runtime voltages 2024-06-12 11:12:46 +02:00
core.c regulator: check that dummy regulator has been probed before using it 2025-03-28 21:59:54 +01:00
cpcap-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
cros-ec-regulator.c
da903x-regulator.c
da9052-regulator.c
da9055-regulator.c
da9062-regulator.c regulator: da9062: Make the use of IRQ optional 2023-07-13 17:35:06 +01:00
da9063-regulator.c regulator: da9063: better fix null deref with partial DT 2023-08-04 13:26:53 +01:00
da9121-regulator.c regulator: da9121-regulator: Remove redundant of_match_ptr() macros 2023-08-09 12:52:41 +01:00
da9121-regulator.h
da9210-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
da9210-regulator.h
da9211-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
da9211-regulator.h
db8500-prcmu.c
dbx500-prcmu.c
dbx500-prcmu.h
devres.c
dummy.c regulator: dummy: force synchronous probing 2025-03-28 21:59:54 +01:00
dummy.h
fan53555.c regulator: fan53555: add enable_time support and soft-start times 2025-07-10 16:03:16 +02:00
fan53880.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
fixed-helper.c
fixed.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
gpio-regulator.c regulator: gpio: Fix the out-of-bounds access to drvdata::gpiods 2025-07-10 16:03:05 +02:00
helpers.c regulator: pickable ranges: don't always cache vsel 2024-06-12 11:12:48 +02:00
hi655x-regulator.c
hi6421-regulator.c regulator: hi6421: Remove redundant of_match_ptr() macros 2023-08-09 12:52:42 +01:00
hi6421v530-regulator.c
hi6421v600-regulator.c
internal.h
irq_helpers.c regulator: irq_helpers: duplicate IRQ name 2024-06-12 11:11:25 +02:00
isl6271a-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
isl9305.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
Kconfig regulator: aw37503: add regulator driver for Awinic AW37503 2023-08-21 13:10:21 +01:00
lm363x-regulator.c
lochnagar-regulator.c
lp872x.c regulator: lp872x: Fix Wvoid-pointer-to-enum-cast warning 2023-08-10 15:44:46 +01:00
lp873x-regulator.c
lp3971.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
lp3972.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
lp8755.c regulator: lp8755: Drop useless header 2023-08-08 15:23:16 +01:00
lp8788-buck.c
lp8788-ldo.c
lp87565-regulator.c regulator: lp87565: Remove redundant of_match_ptr() macros 2023-08-09 12:52:41 +01:00
ltc3589.c regulator: ltc3589: Fix Wvoid-pointer-to-enum-cast warning 2023-08-10 15:44:44 +01:00
ltc3676.c regulator: ltc3676: Use maple tree register cache 2023-06-19 12:59:45 +01:00
Makefile regulator: aw37503: add regulator driver for Awinic AW37503 2023-08-21 13:10:21 +01:00
max1586.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
max5970-regulator.c regulator: max5970: Fix regulator child node name 2024-03-26 18:19:13 -04:00
max8649.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
max8660.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
max8893.c regulator: max8893: Drop "_new" from probe callback 2023-07-21 11:55:42 +01:00
max8907-regulator.c
max8925-regulator.c
max8952.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
max8973-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
max8997-regulator.c
max8998.c
max14577-regulator.c regulator: max14577: Add error check for max14577_read_reg() 2025-06-27 11:08:50 +01:00
max20086-regulator.c regulator: max20086: Change enable gpio to optional 2025-06-27 11:08:43 +01:00
max20411-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
max77541-regulator.c regulator: Use bitfield values for range selectors 2023-07-25 12:14:27 +01:00
max77620-regulator.c
max77650-regulator.c regulator: Use bitfield values for range selectors 2023-07-25 12:14:27 +01:00
max77686-regulator.c
max77693-regulator.c
max77802-regulator.c
max77826-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
max77857-regulator.c regulator: max77857: Fix Wvoid-pointer-to-enum-cast warning 2023-08-10 15:44:45 +01:00
mc13xxx-regulator-core.c
mc13xxx.h
mc13783-regulator.c
mc13892-regulator.c
mcp16502.c regulator: mcp16502: Remove redundant of_match_ptr() macros 2023-08-09 12:52:43 +01:00
mp886x.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
mp5416.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
mp8859.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
mpq7920.c regulator: mpq7920: Remove redundant of_match_ptr() macro 2023-08-09 12:52:44 +01:00
mpq7920.h
mt6311-regulator.c regulator: mt6311: Drop useless header 2023-08-08 15:23:13 +01:00
mt6311-regulator.h
mt6315-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
mt6323-regulator.c
mt6331-regulator.c
mt6332-regulator.c
mt6357-regulator.c
mt6358-regulator.c regulator: mt6358: Fail probe on unknown chip ID 2023-11-20 11:59:04 +01:00
mt6359-regulator.c regulator: Remove duplicated include in mt6359-regulator.c 2023-07-18 15:11:31 +01:00
mt6360-regulator.c regulator: mt6360: De-capitalize devicetree regulator subnodes 2024-05-17 12:01:58 +02:00
mt6370-regulator.c
mt6380-regulator.c
mt6397-regulator.c
mtk-dvfsrc-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
of_regulator.c regulator: of: Implement the unwind path of of_regulator_match() 2025-02-08 09:51:55 +01:00
palmas-regulator.c
pbias-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
pca9450-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
pcap-regulator.c
pcf50633-regulator.c
pf8x00-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
pfuze100-regulator.c regulator: pfuze100-regulator: Remove redundant of_match_ptr() macro 2023-08-09 12:52:45 +01:00
pv88060-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
pv88060-regulator.h
pv88080-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
pv88080-regulator.h
pv88090-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
pv88090-regulator.h
pwm-regulator.c pwm: Rename pwm_apply_state() to pwm_apply_might_sleep() 2024-06-12 11:12:24 +02:00
qcom_rpm-regulator.c regulator: qcom_rpm-regulator: Use devm_kmemdup to replace devm_kmalloc + memcpy 2023-08-10 15:44:43 +01:00
qcom_smd-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
qcom_spmi-regulator.c
qcom_usb_vbus-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
qcom-labibb-regulator.c
qcom-refgen-regulator.c regulator: qcom-refgen: fix module autoloading 2024-06-12 11:11:26 +02:00
qcom-rpmh-regulator.c regulator: qcom-rpmh: Fix smps4 regulator for pm8550ve 2023-11-20 11:59:07 +01:00
raa215300.c regulator: raa215300: Add missing blank space 2023-08-18 16:21:44 +01:00
rc5t583-regulator.c regulator: rc5t583: Drop useless header 2023-08-08 15:23:12 +01:00
rk808-regulator.c objtool, regulator: rk808: Remove potential undefined behavior in rk806_set_mode_dcdc() 2025-05-02 07:50:56 +02:00
rn5t618-regulator.c
rohm-regulator.c regulator: Use bitfield values for range selectors 2023-07-25 12:14:27 +01:00
rpi-panel-attiny-regulator.c regulator: rpi-panel-attiny: Drop useless header 2023-08-08 15:23:12 +01:00
rt4801-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
rt4803.c
rt4831-regulator.c
rt5033-regulator.c
rt5120-regulator.c
rt5190a-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
rt5739.c regulator: rt5739: Add DID check and compatible for rt5733 2023-07-09 22:48:53 +01:00
rt5759-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
rt6160-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
rt6190-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
rt6245-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
rtmv20-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
rtq2134-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
rtq2208-regulator.c regulator: rtq2208: Fix uninitialized use of regulator_config 2024-11-14 13:19:30 +01:00
rtq6752-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
s2mpa01.c regulator: s2mpa01: Drop useless header 2023-08-08 15:23:11 +01:00
s2mps11.c
s5m8767.c
sc2731-regulator.c
scmi-regulator.c
sky81452-regulator.c
slg51000-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
slg51000-regulator.h
sm5703-regulator.c regulator: Updates for v6.4 2023-04-25 17:13:47 -07:00
stm32-booster.c
stm32-pwr.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
stm32-vrefbuf.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
stpmic1_regulator.c
stw481x-vmmc.c
sy7636a-regulator.c
sy8106a-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
sy8824x.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
sy8827n.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
ti-abb-regulator.c regulator: ti-abb: don't use devm_platform_ioremap_resource_byname for shared interrupt register 2024-02-05 20:14:34 +00:00
tps6105x-regulator.c
tps6286x-regulator.c regulator: tps6286x-regulator: Remove redundant of_match_ptr() macros 2023-08-09 12:52:46 +01:00
tps6287x-regulator.c regulator: tps6287x: Force writing VSEL bit 2024-06-12 11:12:48 +02:00
tps6507x-regulator.c
tps6524x-regulator.c
tps6586x-regulator.c
tps6594-regulator.c regulator: tps6594-regulator: Correct multi-phase configuration 2024-06-12 11:12:48 +02:00
tps51632-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
tps62360-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
tps65023-regulator.c regulator: Switch i2c drivers back to use .probe() 2023-05-08 08:50:11 +09:00
tps65086-regulator.c regulator: tps65086: Select dedicated regulator config for chip variant 2023-08-18 22:06:52 +01:00
tps65090-regulator.c
tps65132-regulator.c regulator: tps65132: Add of_match table 2024-05-17 12:02:12 +02:00
tps65217-regulator.c
tps65218-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
tps65219-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
tps65910-regulator.c regulator: tps65910: Drop useless header 2023-08-08 15:23:10 +01:00
tps65912-regulator.c
tps68470-regulator.c
twl-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
twl6030-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
uniphier-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
userspace-consumer.c regulator: userspace-consumer: add module device table 2024-03-26 18:19:34 -04:00
vctrl-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
vexpress-regulator.c regulator: Explicitly include correct DT includes 2023-07-14 20:52:54 +01:00
virtual.c
vqmmc-ipq4019-regulator.c regulator: vqmmc-ipq4019: fix module autoloading 2024-06-12 11:11:26 +02:00
wm831x-dcdc.c
wm831x-isink.c
wm831x-ldo.c
wm8350-regulator.c
wm8400-regulator.c
wm8994-regulator.c