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linux/Documentation/devicetree/bindings/mfd
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Olliver Schinagl eb51c6eb97
dt-bindings: mfd: axp20x: Add software based soft_start for AXP209 LDO3 
In the past, there have been words on various lists that if LDO3 is
disabled in u-boot, but enabled in the DTS, the axp209 driver would
fail to continue/hang. Several enable/disable patches have been
issues to devicetree's in both the kernel and u-boot to address
this issue.

What really happened however, was that the AXP209 shuts down without
a notice and without setting an interrupt. This is caused when LDO3
gets overloaded, for example with large capacitors on the LDO3 output.

Normally, we would expect that AXP209 would source 200 mA as per
datasheet and set and trigger an interrupt when being overloaded.
For some reason however, this does not happen.

As a work-around, implement software-based 'regulator-soft-start'
property for AXP209 LDO3 regulator, which is used to first bring up
the LDO3 to the lowest possible voltage and then enable the LDO.

After that, we can set the requested voltage as usual.

Combining this setting with the regulator-ramp-delay allows LDO3 to
come up slowly and staggered, potentially reducing overall inrush current.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-12-13 16:39:56 +00:00
..
88pm860x.txt
ab8500.txt
ac100.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
act8945a.txt dt-bindings: Remove "status" from examples 2017-09-05 10:03:06 -05:00
altera-a10sr.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
arizona.txt mfd: arizona: Correct link for sound binding document 2018-09-26 18:02:41 -05:00
as3711.txt
as3722.txt mfd: as3722: Disable auto-power-on when AC OK 2018-07-27 08:16:01 +01:00
aspeed-gfx.txt
aspeed-lpc.txt ARM: SoC driver updates for 4.17 2018-04-05 21:29:35 -07:00
aspeed-scu.txt dt-bindings: aspeed-scu: Add clock and reset properties 2017-10-13 10:42:58 +01:00
atmel-flexcom.txt
atmel-gpbr.txt
atmel-hlcdc.txt dt-bindings: Remove "status" from examples 2017-09-05 10:03:06 -05:00
atmel-matrix.txt
atmel-smc.txt mfd: syscon: Update Atmel SMC binding doc 2017-09-05 08:46:00 +01:00
atmel-tcb.txt ARM: at91: Document new TCB bindings 2017-12-31 15:50:00 +01:00
atmel-usart.txt dt-bindings: mfd: atmel-usart: Correct interrupts property to include IRQ number 2018-09-11 11:40:55 +01:00
axp20x.txt dt-bindings: mfd: axp20x: Add software based soft_start for AXP209 LDO3 2018-12-13 16:39:56 +00:00
bd9571mwv.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
bfticu.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
brcm,bcm59056.txt
brcm,iproc-cdru.txt syscon: dt-bindings: Add binding doc for Broadcom iProc CDRU 2017-10-13 10:42:58 +01:00
brcm,iproc-mhb.txt syscon: dt-bindings: Add binding document for iProc MHB block 2017-10-13 10:42:58 +01:00
cros-ec.txt dt-bindings: Use lower case hex in unit-addresses 2017-12-26 10:37:05 -06:00
da9052-i2c.txt DeviceTree updates for 4.14: 2017-09-07 14:43:33 -07:00
da9055.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
da9062.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
da9063.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
da9150.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
fsl-imx25-tsadc.txt
hi6421.txt
hisilicon,hi655x.txt
lp873x.txt
lp3943.txt
lp87565.txt mfd: Add LP87565 PMIC support 2017-07-06 08:29:13 +01:00
madera.txt mfd: madera: Add DT bindings for Cirrus Logic Madera codecs 2018-06-05 11:14:45 +01:00
max8925.txt
max8998.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
max14577.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
max77620.txt
max77686.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
max77693.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
max77802.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
mc13xxx.txt dt-bindings: mfd: mc13xxx: Add the unit address to sysled 2018-01-08 11:03:35 +00:00
mfd.txt dt-bindings: Remove leading zeros from bindings notation 2017-11-09 17:05:05 -06:00
motorola-cpcap.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
mt6397.txt docs: Fix more broken references 2018-06-15 18:11:26 -03:00
mxs-lradc.txt dt-bindings: Remove "status" from examples 2017-09-05 10:03:06 -05:00
omap-usb-host.txt
omap-usb-tll.txt
palmas.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
qcom-pm8xxx.txt
qcom-rpm.txt
qcom,spmi-pmic.txt mfd: qcom-spmi-pmic: Add support for pm8005, pm8998 and pmi8998 2018-06-04 06:47:52 +01:00
qcom,tcsr.txt
qriox.txt
retu.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
rk808.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
rn5t618.txt
rohm,bd71837-pmic.txt mfd: dt bindings: add BD71847 device-tree binding documentation 2018-09-28 14:56:56 +01:00
samsung,exynos5433-lpass.txt dt-bindings: Remove "status" from examples 2017-09-05 10:03:06 -05:00
samsung,sec-core.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
sky81452.txt
sprd,sc27xx-pmic.txt dt-bindings: mfd: Add Spreadtrum SC27xx PMIC documentation 2017-11-01 09:32:42 +00:00
stm32-lptimer.txt dt-bindings: mfd: Add STM32 LPTimer binding 2017-09-04 14:48:57 +01:00
stm32-timers.txt dt-bindings: mfd: stm32-timers: Add support for dmas 2018-05-16 11:13:13 +01:00
stmpe.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
sun4i-gpadc.txt dt-bindings: Remove leading zeros from bindings notation 2017-11-09 17:05:05 -06:00
sun6i-prcm.txt devicetree: fix a series of wrong file references 2018-06-15 18:10:01 -03:00
syscon.txt mfd: syscon: Add hardware spinlock support 2018-01-12 18:32:55 +00:00
tc3589x.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
ti-keystone-devctrl.txt dt-bindings: Remove leading 0x from bindings notation 2017-12-06 14:56:33 -06:00
ti-lmu.txt
tps6105x.txt dt-bindings: mfd: Add TI tps6105x chip bindings 2017-07-18 08:27:32 +01:00
tps6507x.txt
tps65086.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
tps65910.txt dt-bindings: mfd: Fix documentation of tps65911 2018-07-27 08:13:25 +01:00
tps65912.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
twl4030-audio.txt
twl4030-power.txt
twl6040.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
twl-familly.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
wm831x.txt dt-bindings: remove 'interrupt-parent' from bindings 2018-07-25 14:09:39 -06:00
zii,rave-sp.txt dt-bindings: mfd: Add bindings for ZII RAVE devices 2017-09-05 08:46:02 +01:00