From: Mark Brown <broonie@kernel.org>
To: "Vaittinen, Matti" <Matti.Vaittinen@fi.rohmeurope.com>
Cc: "corbet@lwn.net" <corbet@lwn.net>, "pavel@ucw.cz" <pavel@ucw.cz>,
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Subject: Re: [PATCH v5 01/16] dt-bindings: regulator: Document ROHM BD71282 regulator bindings
Date: Wed, 4 Dec 2019 12:47:17 +0000 [thread overview]
Message-ID: <20191204124717.GR1998@sirena.org.uk> (raw)
In-Reply-To: <72a1f4c5768b8c08c2669ea01e60d1b614095a43.camel@fi.rohmeurope.com>
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On Mon, Dec 02, 2019 at 02:02:41PM +0000, Vaittinen, Matti wrote:
> On Mon, 2019-12-02 at 13:11 +0000, Mark Brown wrote:
> > No, look at the bindings - we support a bunch of different
> > suspend states matching the different suspend states that the
> > kernel as a whole supports. We don't assume that the device will
> > know this but you can always use the current suspend we're going
> > for to decide where to update.
> Hm. So if I understand this correctly, you mean user should set the
> suspend 'target' - and then call the set_suspend_voltage for this
> state. To set voltages for all states one should do loop
The general idea is that we set the suspend state during the
process of suspending rather than in advance - that way when the
hardware doesn't understand different types of suspsend things
work fine.
> get_current_mode()
> for_all_modes() {
> set_mode()
> set_voltage()
> }
> restore_original_mode()
> am I on a right track? I'll try to see if I can find some examples of
> this - thanks.
I don't understand the save and restore of mode? If setting the
suspend configuration affects the runtime state then the hardware
doesn't support suspend configuration.
> > The framework doesn't care how a device is controlled, that's up
> > to the device. Like I said I recommend figuring out what
> > voltages are useful to have quick access to at runtime, for
> > example it's likely that it's good to have quick access to the
> > highest voltage that's been set (and/or the top of the
> > constraints).
> Problem is that the run-level controlled regulator can't be
> individually controlled (unless it is only regulator in the group). I
Regulators that have to be controlled en masse aren't really
supported by the API, it only understands regulators that are
individually controllable.
> But just to confirm, I meant for example assigning bucks 1,2,6 and 7
> into a group which 'state' is changed via GPIO line. Say 'states' are
> RUN0, RUN1. For each of these bucks we can define a voltage and
> enable/disable status which is to be used on RUN0, and another
> voltage/state tuple for RUN1.
So you could also just create a group consisting of a single
regulator? That would be fine for the API.
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next prev parent reply other threads:[~2019-12-04 12:47 UTC|newest]
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
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 [this message]
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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