#linux-sunxi on 2023-01-19 — irc logs at oftc.irclog.whitequark.org

2022-12-21 00:44 ChanServ changed the topic of #linux-sunxi to: Allwinner/sunxi development - Did you try looking at our wiki? https://linux-sunxi.org - Don't ask to ask. Just ask and wait for an answer! - This channel is logged at https://oftc.irclog.whitequark.org/linux-sunxi

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00:42 <apritzel> smaeul: do you know what's the story with "enable-active-high;" vs. "gpio = <&pio 3 25 GPIO_ACTIVE_HIGH>;", in a "regulator-fixed" DT node?

00:43 <apritzel> do I need both, or must not have both, or is one version deprecated? Or is the latter only available with some GPIO controller bindings (ours being one of them)?

00:47 <apritzel> the regulator-fixed binding mentions the explicit property

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01:17 <DarkNeutrino> apritzel: https://github.com/bigtreetech/CB1-Kernel/tree/master/docs Looks like Biqu finally released the scheme :)

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01:43 <smaeul> apritzel: you want both enable-active-high and GPIO_ACTIVE_HIGH if a positive voltage turns on the regulator

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01:49 <smaeul> it is like the MMC CD and SPI CS bindings where the default interpretation is "low == active", and you can invert that both with a property (cd-inverted/spi-cs-high) and GPIO_ACTIVE_LOW

01:50 <smaeul> that is, the property and the GPIO flag XOR each other

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14:27 <apritzel> DasChaos: I guess nobody knows anything for certain (same with the A523), but Yuzuki is typically close to the source. And the V851/V853 also seems to ship with both RISC-V and ARM cores activated.

14:28 <apritzel> smaeul: thanks, though I am still confused: "XOR" hints at that specifying both the property and the GPIO flag would cancel each other out? So that's then active_low again? I need to test this tonight ...

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14:36 <gamiee> from what I've seen, Yuzuki is employee of company, which is sub-company of Allwinner

14:38 <gamiee> https://www.crowdsupply.com/whycan-technology/v853-dev-board#team

14:39 <gamiee> AWOL's outsourcing company, providing services for AWOL.

14:39 <gamiee> (so I was not fully right, but yeah, very close to allwinner)

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14:44 <MoeIcenowy> gamiee: I remember he left

14:44 <MoeIcenowy> originally he worked for Allwinner for a few months (seems to be as intern)

14:44 <MoeIcenowy> btw I had some internship in 2021 @ Sipeed ;-)

14:46 <gamiee> MoeIcenowy: oh, interesting

14:46 <MoeIcenowy> (My work back then is trying to mainline R329

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15:13 <DasChaos> <apritzel> "DasChaos: I guess nobody knows..." <- apritzel: Thank you for your answer :)

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