#linux-amlogic on 2021-07-15 — irc logs at libera.irclog.whitequark.org

2021-06-01 12:24 narmstrong changed the topic of #linux-amlogic to: Amlogic mainline kernel development discussion - our wiki http://linux-meson.com/ - ml linux-amlogic@lists.infradead.org - official channel moved from Freenode - publicly logged on https://libera.irclog.whitequark.org/linux-amlogic

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14:44 <armoon> xdarklight I have a question on USB GPIO Polarity on Odroid C1+

14:44 <armoon> As per the https://dn.odroid.com/S805/Schematics/odroid-c1+_rev0.4_20160226.pdf

14:46 <armoon> MP62551DGT-LF IC controls the power for the USB PORTS

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14:47 <armoon> https://www.mouser.com/datasheet/2/277/MP62550-1384050.pdf is MP62551DGT datasheet

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14:49 <armoon> As per the data sheet in section ORDERING INFORMATION Active enable signal is set below MP62551DGT Active High

14:51 <armoon> what is the correct way to set this in DTS GPIO_ACTIVE_LOW or GPIO_ACTIVE_HIGH

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15:17 <xdarklight> armoon: (just FYI, I am short on time and will be back later in case there are any additional questions)

15:17 <xdarklight> armoon: my understanding is that for active high you need to use: GPIO_ACTIVE_HIGH as well as the enable-active-high property as documented in https://www.kernel.org/doc/Documentation/devicetree/bindings/regulator/fixed-regulator.yaml

15:18 <xdarklight> armoon: for active low you need: GPIO_ACTIVE_LOW and do not add the enable-active-high property (the documentation from the link above states for the enable-active-high property: If this property is missing, the default assumed is Active low.)

15:18 <xdarklight> armoon: that's how I came up with the examples in one of my email

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16:36 <armoon> ok thanks

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