mfd/power/phy: Add support for otg vbus detection via axp pmic
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Cover letter [linux-sunxi] [PATCH 0/8] mfd/power/phy: Add support for otg vbus detection via axp pmic
Quoted 8 lines · Hans de Goede
Hi All,
Here is a series which adds the beginning of power-supply support to the axp20x pmic code. My primary reason for working on this is to enable the use of the usb power-supply bits in the pmic to for vbus detection on boards which do not have a vbus-det gpio, and instead rely on the pmic for vbus detection.
Quoted 4 lines
After I had written most of the vbus power-supply driver code I became aware of Bruno Pr?mont's (in the CC) previous work on this our drivers are mostly the same, and I've borrowed some code from his driver to add support for min-volt / max-curr properties.
This is one of the reasons why we try to keep our Mainlining Effort page up-to-date:
http://linux-sunxi.org/Linux_mainlining_effort
Quoted 22 lines
The big difference between our 2 drivers is that mine driver uses a devicetree child node / mfd cell per power-supply, so one for each of the usb-power, ac-power / battery-charger and rtc-backup-bat -charger
bits.Depending on the board each of those must be enabled / disabled separately
in devicetree as most boards do not use all 4. So in dt each one needs its
own child-node of the axp20x node. Another reason for using separate child
nodes for each is so that other devicetree nodes can have a power -supply
property with a phandle referencing a node representing a single power-supply.Regards,
Hans