| a6013680 | 23-Oct-2019 |
Emmanuel Vadot <[email protected]> |
regulator: Add a regnode_set_constraint function
This method check that boot_on or always_on is set to 1 and if it
is it will try to enable the regulator.
The binding docs aren't clear on what to do
regulator: Add a regnode_set_constraint function
This method check that boot_on or always_on is set to 1 and if it
is it will try to enable the regulator.
The binding docs aren't clear on what to do but Linux enable the regulator
if any of those properties is set so we want to do the same.
The function first check the status to see if the regulator is
already enabled it then get the voltage to check if it is in a acceptable
range and then enables it.
This will be either called from the regnode_init method (if it's needed by the platform)
or by a SYSINIT at SI_SUB_LAST
Reviewed by: mmel
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D22106
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| bcc0decd | 16-Jun-2018 |
Michal Meloun <[email protected]> |
Fix handling of enable counter for shared GPIO line in fixed regulator.
For most regulators, the regulator_stop() method can be transformed to
regulator disable. But, in some cases, we needs to main
Fix handling of enable counter for shared GPIO line in fixed regulator.
For most regulators, the regulator_stop() method can be transformed to
regulator disable. But, in some cases, we needs to maintain shared data
across multiple regulators (e.g. single GPIO pin which works as enable
for multiple regulates). In this case, the implementation of regulator
should perform his own enable counting therefore it is necessary to
distinguish between the regulator enable/disable method (which
increments/decrements enable counter for shared resource) and regulator
stop method (which don't affect it).
So:
- add regnode_stop() method to regulator framework and default it to
regnode_enable(..., false, ...)
- implement it in regulator_fixed with proper enable counting.
While I'm in, also fix handling of always_on property. If any of regulators
sharing same GPIO pin have it enabled, then none of them can disable regulator.
Tested by: kevans
MFC after: 3 weeks
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