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Message-ID: <20181204144759.thsvooby6txag2yr@plaes.org>
Date:   Tue, 4 Dec 2018 14:47:59 +0000
From:   Priit Laes <plaes@...es.org>
To:     Maxime Ripard <maxime.ripard@...tlin.com>
Cc:     Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Chen-Yu Tsai <wens@...e.org>,
        Sebastian Reichel <sre@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-pm@...r.kernel.org, Olliver Schinagl <oliver@...inagl.nl>
Subject: Re: [PATCH 09/14] regulator: dts: add full voltage range to LDO4 on
 the Lime2

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@...inagl.nl>
> > > 
> > > 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


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