| 000ee4b7 | 06-Mar-2019 |
Krzysztof Kozlowski <krzk@kernel.org> |
power: regulator: s2mps11: Add enable delay
According to datasheet, the output on LDO regulators will start
appearing after 10-15 us.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by:
power: regulator: s2mps11: Add enable delay
According to datasheet, the output on LDO regulators will start
appearing after 10-15 us.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
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| cc4a224a | 11-Jan-2019 |
Lokesh Vutla <lokeshvutla@ti.com> |
power: regulator: Introduce regulator_set_enable_if_allowed api
regulator_set_enable() api throws an error in the following three cases:
- when requested to disable an always-on regulator
- when set
power: regulator: Introduce regulator_set_enable_if_allowed api
regulator_set_enable() api throws an error in the following three cases:
- when requested to disable an always-on regulator
- when set_enable() ops not provided by regulator driver
- when enabling is actually failed.(Error returned by the regulator driver)
Sometimes consumer drivers doesn't want to track the first two scenarios
and just need to worry about the case where enabling is actually failed.
But it is also a good practice to have an error value returned in the
first two cases.
So introduce an api regulator_set_enable_if_allowed() which ignores the
first two error cases and returns an error as given by regulator driver.
Consumer drivers can use this api need not worry about the first two
error conditions.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
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| ef52605e | 21-Nov-2018 |
Olliver Schinagl <oliver@schinagl.nl> |
power: axp209: Limit inrush current for broken boards
Some boards feature a capacitance on LDO3's output that is too large,
causing inrush currents which as a result, shut down the AXP209. This
has
power: axp209: Limit inrush current for broken boards
Some boards feature a capacitance on LDO3's output that is too large,
causing inrush currents which as a result, shut down the AXP209. This
has been reported before, without knowing the actual cause.
A fix appeared to be done with
commit 0e6e34ac8dbb ("sunxi: Olimex A20 boards: Enable LDO3 and LDO4 regulators").
The description there is a bit misleading, the kernel does not hang
during AXP209 initialization, the PMIC shuts down, causing voltages to
drop and thus the whole system freezes.
While the AXP209 does have the ability to ramp up the voltage slowly, to
reduce these inrush currents, the voltage rate control (VRC) however is
not applicable when switching on the LDO3 output. Only when going from
an enabled lower voltage setting, to a higher voltage setting is the VRC
in effect.
To work around this problem, we set LDO3 to the lowest possible setting
of 0.7 V if it was not yet enabled, and then let the VRC (if enabled) do
its thing. It should be noted, that for some undocumented reason, there
is a short delay needed between setting the LDO3 voltage register and
enabling the power. One would expect that this delay ought to be just
after enabling the output power at 0.7 V, but this did not work.
Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Priit Laes <plaes@plaes.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
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| 61436d50 | 21-Nov-2018 |
Olliver Schinagl <oliver@schinagl.nl> |
power: axp209: Add support for voltage rate control on LDO3
The AXP209 LDO3 regulator supports voltage rate control, or can set a
slew rate.
This allows for the power to gradually rise up to the de
power: axp209: Add support for voltage rate control on LDO3
The AXP209 LDO3 regulator supports voltage rate control, or can set a
slew rate.
This allows for the power to gradually rise up to the desired voltage,
instead of spiking up as fast as possible. Reason to have this can be
to reduce the inrush currents for example.
There are 3 slopes to choose from, the default, 'none' is a voltage rise
of 0.0167 V/uS, a 1.6 mV/uS and a 0.8 mV/uS voltage rise.
In ideal world (where vendors follow the recommended design guidelines)
this setting should not be enabled by default. Unless of course AXP209
crashes instead of reporting overcurrent condition as it normally should
do in this case.
Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Priit Laes <plaes@plaes.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
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| 3f7d76a7 | 21-Nov-2018 |
Olliver Schinagl <oliver@schinagl.nl> |
power: axp209: Reduce magic values by adding defines for LDO[234]
The AXP209 has a few 'magisc-ish' values that are better served with
clear defines.
Signed-off-by: Olliver Schinagl <oliver@schinag
power: axp209: Reduce magic values by adding defines for LDO[234]
The AXP209 has a few 'magisc-ish' values that are better served with
clear defines.
Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Priit Laes <plaes@plaes.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
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| 9dec738a | 14-Nov-2018 |
Ryder Lee <ryder.lee@mediatek.com> |
power domain: MediaTek: add power domain driver for MT7623 SoC
This adds power domain (scpsys) support for MT7623 SoC.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Reviewed-by: Simon Glass <sj
power domain: MediaTek: add power domain driver for MT7623 SoC
This adds power domain (scpsys) support for MT7623 SoC.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
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