Messages in this thread | | | Subject | Re: [linux-sunxi] Re: [PATCH v2] ARM: dts: sunxi: Add regulators for LeMaker BananaPi | From | Hans de Goede <> | Date | Thu, 8 Oct 2015 09:32:40 +0100 |
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Hi,
On 10/07/2015 05:01 PM, Stefan Monnier wrote: >> @Maxime: How should we handle this? In its current form, the patch applies >> only to the BananaPi dts by overriding the inherited opp from the SoC dtsi. >> In an earlier discussion, it was said that this can be done, even though it >> might not be the most elegant approach. But then again, I think it >> shouldn't be necessary to change the opp in the sun7i-a20.dtsi for all A20 >> boards since this is - to my knowledge - the first and only report that an >> A20 board has stability issues at the lower voltages (although not too many >> boards use voltage scaling yet). > > IIUC this setting doesn't affect signals external to the A20, so it > seems like it should be board-agnostic.
This setting configures the voltage at the pmic output pin, not at the SoC power-input pins. And how much of the voltage actually makes it from the pmic to the SoC definitely is board-specific. So we are going to need board-specific opp-s in some cases (like this one for example).
Regards,
Hans
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