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From: "Vaittinen, Matti" <Matti.Vaittinen@fi.rohmeurope.com>
To: "broonie@kernel.org" <broonie@kernel.org>
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Subject: Re: [PATCH v5 01/16] dt-bindings: regulator: Document ROHM BD71282 regulator bindings
Date: Tue, 19 Nov 2019 18:51:37 +0000
Message-ID: <fa69d01504817e3260d2b023ae2637aa2f1b2862.camel@fi.rohmeurope.com> (raw)
In-Reply-To: <20191119181325.GD3634@sirena.org.uk>


On Tue, 2019-11-19 at 18:13 +0000, Mark Brown wrote:
> On Mon, Nov 18, 2019 at 06:03:42PM +0000, Vaittinen, Matti wrote:
> > On Mon, 2019-11-18 at 16:25 +0000, Mark Brown wrote:
> > > On Mon, Nov 18, 2019 at 08:53:57AM +0200, Matti Vaittinen wrote:
> > > I don't think I saw this having the effect on set_voltage() that
> > > I'd
> > > have expected in the driver?  
> > The support for this is added in patch 12. I should've ordered the
> > patch series so that all regulator patches were one after another.
> > Sorry for that.
> > The patch 12 adds the run-level support. Please see the functions
> > get_runcontrolled_bucks_dt(),
> > mark_regulator_runlvl_controlled() (sets the g->runlvl)
> > and set_buck_runlvl_controlled() (called based on g->runlvl)
> > which changes the ops to disallow setters and to get voltage based
> > on
> > current runlevel - and different ops depending on if runlevels are
> > controlled by GPIO or I2C. Additionally
> > set_buck_runlvl_controlled()
> > adds DT parsing call-back for setting the initial voltages.
> 
> Ah, OK.  I didn't even notice that patch when I scanned the series.
> I'll look out for this next time around but that sounds like it's
> generally going in the right direction, especially if it's integrated
> with the suspend mode regulator bindings that Chunyan did.

Probably it is not as I am not familiar with Chunyan's work. I'll try
looking what has been done on that front :) And I am pretty sure you
might not be happy with that patch - but perhaps you can give me a
nudge to better direction...

> > > > +        minimum: 0
> > > > +        maximum: 2000000
> > > > +        maxItems: 4
> > > > +        description:
> > > > +          Array of voltages for run-levels. First value is for
> > > > run-level 0,
> > > > +          second for run-level 1 etc. Microvolts.
> > > What's the mapping from array indexes to the names used elsewhere
> > > to
> > > support runlevels?
> > Hmm. Sorry Mark, I don't think I follow your question. Do you mean
> > names like LPSR, SUSPEND, IDLE, RUN? If so, then I might need to
> > rephrase this. The runlevels referred here are different from LPSR,
> > SUSPEND, IDLE etc. They are actually 'sub-levels' for PMIC's RUN
> > state.
> > Eg, kind of a 'fast way' to change voltages for multiple power
> > rails
> > when SoC is at RUN state. The names I have seen are RUN0, RUN1,
> > RUN2
> > and RUN3. That mapping is described in description above.
> 
> Yes, I think this needs clarification as I completely failed to pick
> up
> on this and did indeed read this as referring to the
> modes.  "Voltages
> that can be set in RUN mode" or something?  I take it these voltages
> are
> fixed and the OS can't change them?

Unfortunately they are not. Voltages and enable/disable statuses for
each run-level (and individually for each run-level capable buck) can
be changed at runtime via I2C. And a customer requested me also to
support this - hence the in-kernel API - but I am sure you have some
nice words when you check the patch 12. :]

Br,
	Matti Vaittinen


  reply index

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-18  6:53 [PATCH v5 00/16] Support ROHM BD71828 PMIC Matti Vaittinen
2019-11-18  6:53 ` [PATCH v5 01/16] dt-bindings: regulator: Document ROHM BD71282 regulator bindings Matti Vaittinen
2019-11-18 16:25   ` Mark Brown
2019-11-18 18:03     ` Vaittinen, Matti
2019-11-19 18:13       ` Mark Brown
2019-11-19 18:51         ` Vaittinen, Matti [this message]
2019-11-19 19:36           ` Mark Brown
2019-11-29  7:48             ` Vaittinen, Matti
2019-11-29 12:09               ` Mark Brown
2019-12-02  7:57                 ` Vaittinen, Matti
2019-12-02 13:11                   ` Mark Brown
2019-12-02 14:02                     ` Vaittinen, Matti
2019-12-04 12:47                       ` Mark Brown
2019-12-04 13:13                         ` Vaittinen, Matti
2019-12-04 14:14                           ` Mark Brown
2019-12-10 10:39                             ` Vaittinen, Matti
2019-12-10 11:14                 ` Vaittinen, Matti
2019-12-10 12:11                   ` Mark Brown
2019-12-10 12:41                     ` Vaittinen, Matti
2019-12-10 12:45                       ` Mark Brown
2019-12-10 13:07                         ` Vaittinen, Matti
2019-11-22 22:48   ` Rob Herring
2019-11-18  6:54 ` [PATCH v5 02/16] dt-bindings: leds: ROHM BD71282 PMIC LED driver Matti Vaittinen
2019-11-22 23:00   ` Rob Herring
2019-11-18  6:54 ` [PATCH v5 03/16] dt-bindings: mfd: Document ROHM BD71828 bindings Matti Vaittinen
2019-11-22 23:05   ` Rob Herring
2019-11-18  6:55 ` [PATCH v5 04/16] mfd: rohm PMICs - use platform_device_id to match MFD sub-devices Matti Vaittinen
2019-11-18  6:55 ` [PATCH v5 05/16] mfd: bd71828: Support ROHM BD71828 PMIC - core Matti Vaittinen
2019-11-18  6:56 ` [PATCH v5 06/16] mfd: input: bd71828: Add power-key support Matti Vaittinen
2019-11-18  6:56 ` [PATCH v5 07/16] clk: bd718x7: Support ROHM BD71828 clk block Matti Vaittinen
2019-11-18  6:57 ` [PATCH v5 08/16] regulator: bd718x7: Split driver to common and bd718x7 specific parts Matti Vaittinen
2019-11-18  6:57 ` [PATCH v5 09/16] regulator: bd71828: Basic support for ROHM bd71828 PMIC regulators Matti Vaittinen
2019-11-18 16:20   ` Mark Brown
2019-11-19  9:12     ` Vaittinen, Matti
2019-11-18  6:58 ` [PATCH v5 10/16] gpio: devres: Add devm_gpiod_get_parent_array Matti Vaittinen
2019-11-19 14:43   ` Linus Walleij
2019-11-19 17:54     ` Vaittinen, Matti
2019-11-21 14:13       ` Linus Walleij
2019-11-18  6:59 ` [PATCH v5 11/16] docs: driver-model: Add missing managed GPIO array get functions Matti Vaittinen
2019-11-18  6:59 ` [PATCH v5 12/16] regulator: bd71828: Add GPIO based run-level control for regulators Matti Vaittinen
2019-11-18  7:00 ` [PATCH v5 13/16] rtc: bd70528 add BD71828 support Matti Vaittinen
2019-12-10 13:24   ` Alexandre Belloni
2019-11-18  7:01 ` [PATCH v5 14/16] gpio: bd71828: Initial support for ROHM BD71828 PMIC GPIOs Matti Vaittinen
2019-11-18  9:22   ` Bartosz Golaszewski
2019-11-18  7:03 ` [PATCH v5 15/16] leds: Add common LED binding parsing support to LED class/core Matti Vaittinen
2019-11-18 21:55   ` Jacek Anaszewski
2019-11-19  7:21     ` Vaittinen, Matti
2019-11-19 19:30       ` Jacek Anaszewski
2019-11-20  7:31         ` Vaittinen, Matti
2019-11-19 14:23   ` Vaittinen, Matti
2019-11-18  7:03 ` [PATCH v5 16/16] led: bd71828: Support LED outputs on ROHM BD71828 PMIC Matti Vaittinen

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