Re: [PATCH 09/14] regulator: dts: add full voltage range to LDO4 on the Lime2

[Priit Laes]

On Wed, Nov 28, 2018 at 10:56:39AM +0100, Maxime Ripard wrote:
> On Tue, Nov 27, 2018 at 10:38:52AM +0100, Maxime Ripard wrote:
> > On Mon, Nov 26, 2018 at 05:27:50PM +0200, Priit Laes wrote:
> > > From: Olliver Schinagl <oliver@xxxxxxxxxxx>
> > > 
> > > With commit b43776d65a33b46092 ("ARM: dts: sunxi: Use axp209.dtsi for
> > > Olinuxino Lime2") we force them an arbitrary 2.8 volts. Granted, for
> > > LDO3 this may be less arbitrary, but for LDO4 this is just wrong.
> > > 
[ ... ]
> > As we discussed on the U-Boot ML already, this shouldn't be made
> > always-on but tied to the consumer device (the pinctrl one) instead.
> 
> Can you test that patch (not tested):
> http://code.bulix.org/h02vha-514284?raw

Quick test (after applying this: http://code.bulix.org/w01xab-518044?raw )
results in failure:

[snip]
dmesg -t |egrep "(regu|seria)"
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pb not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: Linked as a consumer to regulator.0
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pb not found, using dummy regulator
1c28000.serial: ttyS0 at MMIO 0x1c28000 (irq = 47, base_baud = 1500000) is a U6_16550A
sun4i-pinctrl 1c20800.pinctrl: Couldn't get bank PG regulator
sun4i-pinctrl 1c20800.pinctrl: pin-198 (1c28c00.serial) status -22
dw-apb-uart 1c28c00.serial: Error applying setting, reverse things back
dw-apb-uart: probe of 1c28c00.serial failed with error -22
sun4i-pinctrl 1c20800.pinctrl: Couldn't get bank PG regulator
sun4i-pinctrl 1c20800.pinctrl: pin-202 (1c29000.serial) status -22
dw-apb-uart 1c29000.serial: Error applying setting, reverse things back
dw-apb-uart: probe of 1c29000.serial failed with error -22
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
sun4i-pinctrl 1c20800.pinctrl: 1c20800.pinctrl supply vcc-pa not found, using dummy regulator
...
[/snip]

And I cannot actually see the link between pinctrl and ldo4. There's currently only this link:

sun4i-pinctrl 1c20800.pinctrl: Linked as a consumer to regulator.0

$ cat /sys/class/regulator/regulator.0/name
regulator-dummy


> 
> Thanks!
> Maxime
> 
> -- 
> Maxime Ripard, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com