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From: "Vaittinen, Matti" <Matti.Vaittinen@fi.rohmeurope.com>
To: "linus.walleij@linaro.org" <linus.walleij@linaro.org>
Cc: "linux-leds@vger.kernel.org" <linux-leds@vger.kernel.org>,
	"dmurphy@ti.com" <dmurphy@ti.com>,
	"linux-rtc@vger.kernel.org" <linux-rtc@vger.kernel.org>,
	"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
	"alexandre.belloni@bootlin.com" <alexandre.belloni@bootlin.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"mturquette@baylibre.com" <mturquette@baylibre.com>,
	"lgirdwood@gmail.com" <lgirdwood@gmail.com>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
	"mazziesaccount@gmail.com" <mazziesaccount@gmail.com>,
	"a.zummo@towertech.it" <a.zummo@towertech.it>,
	"jacek.anaszewski@gmail.com" <jacek.anaszewski@gmail.com>,
	"mark.rutland@arm.com" <mark.rutland@arm.com>,
	"robh+dt@kernel.org" <robh+dt@kernel.org>,
	"bgolaszewski@baylibre.com" <bgolaszewski@baylibre.com>,
	"linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>,
	"sboyd@kernel.org" <sboyd@kernel.org>,
	"lee.jones@linaro.org" <lee.jones@linaro.org>,
	"broonie@kernel.org" <broonie@kernel.org>,
	"pavel@ucw.cz" <pavel@ucw.cz>
Subject: Re: [RFC PATCH v3 10/15] regulator: bd71828: Add GPIO based run-level control for regulators
Date: Mon, 4 Nov 2019 07:05:06 +0000
Message-ID: <1550472ac1e105bd38da25803358cfbc0404bf38.camel@fi.rohmeurope.com> (raw)
In-Reply-To: <CACRpkdZYw3QQcQ4h5y_C0UD6+4Wz9AdmQ0qSrrjfUweuJj8hyQ@mail.gmail.com>

Hello Linus,

On Sun, 2019-11-03 at 23:27 +0100, Linus Walleij wrote:
> On Fri, Nov 1, 2019 at 12:43 PM Matti Vaittinen
> <matti.vaittinen@fi.rohmeurope.com> wrote:
> 
> > Bucks 1,2,6 and 7 on ROHM BD71828 can be either controlled as
> > individual regulartors - or they can be grouped to a group of
> > regulators that are controlled by 'run levels'. This can be
> > done via I2C. Each regulator can be assigned a voltage and
> > enable/disable status for each run-level. These statuses are
> > also changeable via I2C.
> > 
> > Run-levels can then be changed either by I2C or GPIO. This
> > control mechanism is selected by data in one time programmable
> > area (during production) and can't be changed later.
> > 
> > Allow regulators to be controlled via run-levels and allow
> > getting/setting the current run-level also via GPIO.
> > 
> > Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
> 
> I like the way you use the gpio API so FWIW:
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Thanks. And I like the GPIO set multiple - that's required in order to
do some of the run-level changes without intermediate states. (Eg. both
DVS GPIOs need to be toggled via single register write).

> I do not understand the regulator parts of the patch.

I'm sorry. The patch is not clearest one what comes to the regulator
stuff. I can try splitting it to smaller and more logical changes if
you, Mark or other interested people hope to get it splitted. Or
perhaps it would be simplest to review if it was all in one patch? 

Rationale for splitting it in first place was that I hoped the basic
support (first two regulator patches) to be acceptable without huge
changes - whereas the follow up patches are more like question that how
the heck should I implement this :] I've not hit similar 'change bunch
of regulator states at one go' drivers/hardware before.

Br,
	Matti Vaittinen

  reply index

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-01 11:28 [RFC PATCH v3 00/15] Support ROHM BD71828 PMIC Matti Vaittinen
2019-11-01 11:29 ` [RFC PATCH v3 01/15] mfd: bd71828: Support ROHM BD71828 PMIC - core Matti Vaittinen
2019-11-11 10:57   ` Lee Jones
2019-11-11 11:20     ` Vaittinen, Matti
2019-11-01 11:31 ` [RFC PATCH v3 02/15] dt-bindings: mfd: Document ROHM BD71828 bindings Matti Vaittinen
2019-11-05 20:43   ` Rob Herring
2019-11-06 12:55     ` SPAM (R/EU IT) // " Vaittinen, Matti
2019-11-01 11:31 ` [RFC PATCH v3 03/15] dt-bindings: regulator: Document ROHM BD71282 regulator bindings Matti Vaittinen
2019-11-05 20:52   ` Rob Herring
2019-11-07  6:50     ` SPAM (R/EU IT) // " Vaittinen, Matti
2019-11-01 11:32 ` [RFC PATCH v3 04/15] dt-bindings: leds: ROHM BD71282 PMIC LED driver Matti Vaittinen
2019-11-05 19:14   ` Dan Murphy
2019-11-05 20:59     ` Rob Herring
2019-11-06 13:05     ` Vaittinen, Matti
2019-11-05 20:57   ` Rob Herring
2019-11-01 11:33 ` [RFC PATCH v3 05/15] mfd: input: bd71828: Add power-key support Matti Vaittinen
2019-11-11 10:59   ` Lee Jones
2019-11-11 11:07     ` Vaittinen, Matti
2019-11-01 11:38 ` [RFC PATCH v3 06/15] clk: bd718x7: Support ROHM BD71828 clk block Matti Vaittinen
2019-11-01 11:39 ` [RFC PATCH v3 07/15] clk: bd718x7: simplify header dependencies Matti Vaittinen
2019-11-01 11:41 ` [RFC PATCH v3 08/15] regulator: bd718x7: Split driver to common and bd718x7 specific parts Matti Vaittinen
2019-11-01 11:42 ` [RFC PATCH v3 09/15] regulator: bd71828: Basic support for ROHM bd71828 PMIC regulators Matti Vaittinen
2019-11-01 11:43 ` [RFC PATCH v3 10/15] regulator: bd71828: Add GPIO based run-level control for regulators Matti Vaittinen
2019-11-03 22:27   ` Linus Walleij
2019-11-04  7:05     ` Vaittinen, Matti [this message]
2019-11-05 13:24       ` Linus Walleij
2019-11-05 14:07         ` Vaittinen, Matti
2019-11-01 11:44 ` [RFC PATCH v3 11/15] regulator: bd71828: enhanced run-level support Matti Vaittinen
2019-11-01 11:45 ` [RFC PATCH v3 12/15] regulator: bd71828: Support in-kernel APIs to change run-level Matti Vaittinen
2019-11-01 11:49 ` [RFC PATCH v3 13/15] rtc: bd70528 add BD71828 support Matti Vaittinen
2019-11-01 11:49 ` [RFC PATCH v3 14/15] gpio: Add definition for GPIO direction Matti Vaittinen
2019-11-03 22:30   ` Linus Walleij
2019-11-04  6:57     ` Vaittinen, Matti
2019-11-04 15:48     ` Vaittinen, Matti
2019-11-05 15:05       ` Linus Walleij
2019-11-06  6:51         ` Vaittinen, Matti
2019-11-01 11:51 ` [RFC PATCH v3 15/15] gpio: bd71828: Initial support for ROHM BD71828 PMIC GPIOs Matti Vaittinen
2019-11-01 11:53 ` [RFC PATCH v3 00/15] Support ROHM BD71828 PMIC Vaittinen, Matti

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