linux-kernel - Re: [PATCH v10 11/13] gpio: bd71828: Initial support for ROHM BD71828 PMIC GPIOs

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Date:   Mon, 20 Jan 2020 08:02:20 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     "Vaittinen, Matti" <Matti.Vaittinen@...rohmeurope.com>
Cc:     "linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
        "dmurphy@...com" <dmurphy@...com>,
        "linux-rtc@...r.kernel.org" <linux-rtc@...r.kernel.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "mazziesaccount@...il.com" <mazziesaccount@...il.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "jacek.anaszewski@...il.com" <jacek.anaszewski@...il.com>,
        "a.zummo@...ertech.it" <a.zummo@...ertech.it>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "bgolaszewski@...libre.com" <bgolaszewski@...libre.com>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "pavel@....cz" <pavel@....cz>,
        "broonie@...nel.org" <broonie@...nel.org>
Subject: Re: [PATCH v10 11/13] gpio: bd71828: Initial support for ROHM
 BD71828 PMIC GPIOs

On Mon, 20 Jan 2020, Vaittinen, Matti wrote:

> Hello,
> 
> On Fri, 2020-01-17 at 10:21 +0000, Lee Jones wrote:
> > On Fri, 17 Jan 2020, Matti Vaittinen wrote:
> > 
> > > ROHM BD71828 PMIC contains 4 pins which can be configured by OTP
> > > to be used for general purposes. First 3 can be used as outputs
> > > and 4.th pin can be used as input. Allow them to be controlled
> > > via GPIO framework.
> > > 
> > > The driver assumes all of the pins are configured as GPIOs and
> > > trusts that the reserved pins in other OTP configurations are
> > > excluded from control using "gpio-reserved-ranges" device tree
> > > property (or left untouched by GPIO users).
> > > 
> > > Typical use for 4.th pin (input) is to use it as HALL sensor
> > > input so that this pin state is toggled when HALL sensor detects
> > > LID position change (from close to open or open to close). PMIC
> > > HW implements some extra logic which allows PMIC to power-up the
> > > system when this pin is toggled. Please see the data sheet for
> > > details of GPIO options which can be selected by OTP settings.
> > > 
> > > Signed-off-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
> > > Reviewed-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> > > Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> > 
> > Linus, Is that an Ack?
> I have always thought that reviewed-by implies that reviewer is Ok with
> the patch (imples Ack). Maybe I have mistaken?

I would rather not assume.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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