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Date:   Fri, 1 May 2020 15:10:18 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Jonathan Bakker <xc-racer2@...e.ca>
Cc:     kgene@...nel.org, robh+dt@...nel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 02/13] arm: dts: s5pv210: fascinate4g: Add sleep GPIO
 configuration

On Tue, Apr 28, 2020 at 04:49:36PM -0700, Jonathan Bakker wrote:
> Hi Krzysztof,
> 
> On 2020-04-28 3:02 a.m., Krzysztof Kozlowski wrote:
> > On Sun, Apr 26, 2020 at 11:35:53AM -0700, Jonathan Bakker wrote:
> >> In order to minimize leakage current during sleep, set a config
> >> for sleep GPIOs.
> >>
> >> Signed-off-by: Jonathan Bakker <xc-racer2@...e.ca>
> >> ---
> >>  arch/arm/boot/dts/s5pv210-fascinate4g.dts | 242 ++++++++++++++++++++++
> >>  1 file changed, 242 insertions(+)
> >>
> >> diff --git a/arch/arm/boot/dts/s5pv210-fascinate4g.dts b/arch/arm/boot/dts/s5pv210-fascinate4g.dts
> >> index 07a8d9bbe5b8..94dcb9b64b9a 100644
> >> --- a/arch/arm/boot/dts/s5pv210-fascinate4g.dts
> >> +++ b/arch/arm/boot/dts/s5pv210-fascinate4g.dts
> >> @@ -36,3 +36,245 @@
> >>  		};
> >>  	};
> >>  };
> >> +
> >> +&pinctrl0 {
> >> +	pinctrl-names = "default";
> >> +	pinctrl-0 = <&sleep_cfg>;
> >> +
> >> +	sleep_cfg: sleep-cfg {
> >> +		PIN_SLP(gpa0-0, PREV, NONE);
> >> +		PIN_SLP(gpa0-1, PREV, NONE);
> >> +		PIN_SLP(gpa0-2, PREV, NONE);
> >> +		PIN_SLP(gpa0-3, OUT1, NONE);
> > 
> > I would be happy to see some reasoning why certain pins have disabled
> > pull down (e.g. they are not connected or you use the same configuration
> > as running one) and why you set them as output.
> > 
> 
> Mostly it's copied from the vendor kernel configuration.  Without schematics, I can
> only guess what's actually there.  I can go through and note what each pin appears
> to be used for if you'd like.

Then please mention that it is based on vendor kernel vx.y for product
ABC.  In such case it will be enough.

> 
> >> +		PIN_SLP(gpa0-4, PREV, NONE);
> >> +		PIN_SLP(gpa0-5, PREV, NONE);
> >> +		PIN_SLP(gpa0-6, PREV, NONE);
> >> +		PIN_SLP(gpa0-7, PREV, NONE);
> >> +
> >> +		PIN_SLP(gpa1-0, INPUT, DOWN);
> >> +		PIN_SLP(gpa1-1, OUT0, NONE);
> >> +		PIN_SLP(gpa1-2, INPUT, DOWN);
> >> +		PIN_SLP(gpa1-3, OUT0, NONE);
> >> +
> >> +		PIN_SLP(gpb-0, OUT0, NONE);
> >> +		PIN_SLP(gpb-1, OUT1, NONE);
> >> +		PIN_SLP(gpb-2, OUT0, NONE);
> >> +		PIN_SLP(gpb-3, PREV, NONE);
> >> +		PIN_SLP(gpb-4, INPUT, NONE);
> >> +		PIN_SLP(gpb-5, PREV, NONE);
> >> +		PIN_SLP(gpb-6, INPUT, DOWN);
> >> +		PIN_SLP(gpb-7, OUT0, NONE);
> >> +
> >> +		PIN_SLP(gpc0-0, OUT0, NONE);
> >> +		PIN_SLP(gpc0-1, INPUT, DOWN);
> >> +		PIN_SLP(gpc0-2, OUT0, NONE);
> >> +		PIN_SLP(gpc0-3, INPUT, DOWN);
> >> +		PIN_SLP(gpc0-4, OUT0, NONE);
> >> +
> >> +		PIN_SLP(gpc1-0, INPUT, DOWN);
> >> +		PIN_SLP(gpc1-1, INPUT, DOWN);
> >> +		PIN_SLP(gpc1-2, INPUT, DOWN);
> >> +		PIN_SLP(gpc1-3, INPUT, DOWN);
> >> +		PIN_SLP(gpc1-4, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(gpd0-0, INPUT, DOWN);
> >> +		PIN_SLP(gpd0-1, OUT0, NONE);
> >> +		PIN_SLP(gpd0-2, INPUT, DOWN);
> >> +		PIN_SLP(gpd0-3, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(gpd1-0, INPUT, NONE);
> >> +		PIN_SLP(gpd1-1, INPUT, NONE);
> >> +		PIN_SLP(gpd1-2, INPUT, DOWN);
> >> +		PIN_SLP(gpd1-3, INPUT, DOWN);
> >> +		PIN_SLP(gpd1-4, INPUT, DOWN);
> >> +		PIN_SLP(gpd1-5, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(gpe0-0, INPUT, DOWN);
> >> +		PIN_SLP(gpe0-1, INPUT, DOWN);
> >> +		PIN_SLP(gpe0-2, INPUT, DOWN);
> >> +		PIN_SLP(gpe0-3, INPUT, DOWN);
> >> +		PIN_SLP(gpe0-4, INPUT, DOWN);
> >> +		PIN_SLP(gpe0-5, INPUT, DOWN);
> >> +		PIN_SLP(gpe0-6, INPUT, DOWN);
> >> +		PIN_SLP(gpe0-7, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(gpe1-0, INPUT, DOWN);
> >> +		PIN_SLP(gpe1-1, INPUT, DOWN);
> >> +		PIN_SLP(gpe1-2, INPUT, DOWN);
> >> +		PIN_SLP(gpe1-3, OUT0, NONE);
> >> +		PIN_SLP(gpe1-4, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(gpf0-0, OUT0, NONE);
> >> +		PIN_SLP(gpf0-1, OUT0, NONE);
> >> +		PIN_SLP(gpf0-2, OUT0, NONE);
> >> +		PIN_SLP(gpf0-3, OUT0, NONE);
> >> +		PIN_SLP(gpf0-4, OUT0, NONE);
> >> +		PIN_SLP(gpf0-5, OUT0, NONE);
> >> +		PIN_SLP(gpf0-6, OUT0, NONE);
> >> +		PIN_SLP(gpf0-7, OUT0, NONE);
> >> +
> >> +		PIN_SLP(gpf1-0, OUT0, NONE);
> >> +		PIN_SLP(gpf1-1, OUT0, NONE);
> >> +		PIN_SLP(gpf1-2, OUT0, NONE);
> >> +		PIN_SLP(gpf1-3, OUT0, NONE);
> >> +		PIN_SLP(gpf1-4, OUT0, NONE);
> >> +		PIN_SLP(gpf1-5, OUT0, NONE);
> >> +		PIN_SLP(gpf1-6, OUT0, NONE);
> >> +		PIN_SLP(gpf1-7, OUT0, NONE);
> >> +
> >> +		PIN_SLP(gpf2-0, OUT0, NONE);
> >> +		PIN_SLP(gpf2-1, OUT0, NONE);
> >> +		PIN_SLP(gpf2-2, OUT0, NONE);
> >> +		PIN_SLP(gpf2-3, OUT0, NONE);
> >> +		PIN_SLP(gpf2-4, OUT0, NONE);
> >> +		PIN_SLP(gpf2-5, OUT0, NONE);
> >> +		PIN_SLP(gpf2-6, OUT0, NONE);
> >> +		PIN_SLP(gpf2-7, OUT0, NONE);
> >> +
> >> +		PIN_SLP(gpf3-0, OUT0, NONE);
> >> +		PIN_SLP(gpf3-1, OUT0, NONE);
> >> +		PIN_SLP(gpf3-2, OUT0, NONE);
> >> +		PIN_SLP(gpf3-3, OUT0, NONE);
> >> +		PIN_SLP(gpf3-4, PREV, NONE);
> >> +		PIN_SLP(gpf3-5, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(gpg0-0, INPUT, DOWN);
> >> +		PIN_SLP(gpg0-1, INPUT, DOWN);
> >> +		PIN_SLP(gpg0-2, INPUT, NONE);
> >> +		PIN_SLP(gpg0-3, INPUT, DOWN);
> >> +		PIN_SLP(gpg0-4, INPUT, DOWN);
> >> +		PIN_SLP(gpg0-5, INPUT, DOWN);
> >> +		PIN_SLP(gpg0-6, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(gpg1-0, OUT0, NONE);
> >> +		PIN_SLP(gpg1-1, OUT1, NONE);
> >> +		PIN_SLP(gpg1-2, PREV, NONE);
> >> +		PIN_SLP(gpg1-3, OUT1, NONE);
> >> +		PIN_SLP(gpg1-4, OUT1, NONE);
> >> +		PIN_SLP(gpg1-5, OUT1, NONE);
> >> +		PIN_SLP(gpg1-6, OUT1, NONE);
> >> +
> >> +		PIN_SLP(gpg2-0, OUT0, NONE);
> >> +		PIN_SLP(gpg2-1, OUT0, NONE);
> >> +		PIN_SLP(gpg2-2, INPUT, NONE);
> >> +		PIN_SLP(gpg2-3, OUT0, NONE);
> >> +		PIN_SLP(gpg2-4, OUT0, NONE);
> >> +		PIN_SLP(gpg2-5, OUT0, NONE);
> >> +		PIN_SLP(gpg2-6, OUT0, NONE);
> >> +
> >> +		PIN_SLP(gpg3-0, PREV, UP);
> >> +		PIN_SLP(gpg3-1, PREV, UP);
> >> +		PIN_SLP(gpg3-2, INPUT, NONE);
> >> +		PIN_SLP(gpg3-3, INPUT, DOWN);
> >> +		PIN_SLP(gpg3-4, OUT0, NONE);
> >> +		PIN_SLP(gpg3-5, OUT0, NONE);
> >> +		PIN_SLP(gpg3-6, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(gpi-0, PREV, NONE);
> > 
> > No such name. Did you mean gpgi?
> > 
> > 
> 
> The node in s5pv210-pinctrl.dtsi is called "gpgi", but the i2s0_bus config
> in that file uses just "gpi".  drivers/pinctrl/samsung/pinctrl-exynos-arm.c also
> notes it just as "gpi".  I think the node should probably be renamed.
> 

Good point. Will you send a fix for gpgi->gpi?

> >> +		PIN_SLP(gpi-1, INPUT, DOWN);
> >> +		PIN_SLP(gpi-2, PREV, NONE);
> >> +		PIN_SLP(gpi-3, PREV, NONE);
> >> +		PIN_SLP(gpi-4, PREV, NONE);
> >> +		PIN_SLP(gpi-5, INPUT, DOWN);
> >> +		PIN_SLP(gpi-6, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(gpj0-0, INPUT, NONE);
> >> +		PIN_SLP(gpj0-1, INPUT, NONE);
> >> +		PIN_SLP(gpj0-2, INPUT, NONE);
> >> +		PIN_SLP(gpj0-3, INPUT, NONE);
> >> +		PIN_SLP(gpj0-4, INPUT, NONE);
> >> +		PIN_SLP(gpj0-5, INPUT, DOWN);
> >> +		PIN_SLP(gpj0-6, OUT0, NONE);
> >> +		PIN_SLP(gpj0-7, INPUT, NONE);
> >> +
> >> +		PIN_SLP(gpj1-0, OUT1, NONE);
> >> +		PIN_SLP(gpj1-1, OUT0, NONE);
> >> +		PIN_SLP(gpj1-2, INPUT, DOWN);
> >> +		PIN_SLP(gpj1-3, PREV, NONE);
> >> +		PIN_SLP(gpj1-4, PREV, NONE);
> >> +		PIN_SLP(gpj1-5, OUT0, NONE);
> >> +
> >> +		PIN_SLP(gpj2-0, INPUT, DOWN);
> >> +		PIN_SLP(gpj2-1, INPUT, DOWN);
> >> +		PIN_SLP(gpj2-2, OUT0, NONE);
> >> +		PIN_SLP(gpj2-3, INPUT, DOWN);
> >> +		PIN_SLP(gpj2-4, INPUT, DOWN);
> >> +		PIN_SLP(gpj2-5, PREV, NONE);
> >> +		PIN_SLP(gpj2-6, PREV, NONE);
> >> +		PIN_SLP(gpj2-7, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(gpj3-0, INPUT, NONE);
> >> +		PIN_SLP(gpj3-1, INPUT, NONE);
> >> +		PIN_SLP(gpj3-2, OUT0, NONE);
> >> +		PIN_SLP(gpj3-3, INPUT, DOWN);
> >> +		PIN_SLP(gpj3-4, INPUT, NONE);
> >> +		PIN_SLP(gpj3-5, INPUT, NONE);
> >> +		PIN_SLP(gpj3-6, INPUT, NONE);
> >> +		PIN_SLP(gpj3-7, INPUT, NONE);
> >> +
> >> +		PIN_SLP(gpj4-0, INPUT, NONE);
> >> +		PIN_SLP(gpj4-1, INPUT, DOWN);
> >> +		PIN_SLP(gpj4-2, PREV, NONE);
> >> +		PIN_SLP(gpj4-3, INPUT, NONE);
> >> +		PIN_SLP(gpj4-4, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(mp01-0, OUT1, NONE);
> >> +		PIN_SLP(mp01-1, OUT0, NONE);
> >> +		PIN_SLP(mp01-2, INPUT, DOWN);
> >> +		PIN_SLP(mp01-3, INPUT, DOWN);
> >> +		PIN_SLP(mp01-4, OUT1, NONE);
> >> +		PIN_SLP(mp01-5, INPUT, DOWN);
> >> +		PIN_SLP(mp01-6, INPUT, DOWN);
> >> +		PIN_SLP(mp01-7, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(mp02-0, INPUT, DOWN);
> >> +		PIN_SLP(mp02-1, INPUT, DOWN);
> >> +		PIN_SLP(mp02-2, INPUT, NONE);
> >> +		PIN_SLP(mp02-3, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(mp03-0, INPUT, DOWN);
> >> +		PIN_SLP(mp03-1, INPUT, DOWN);
> >> +		PIN_SLP(mp03-2, OUT1, NONE);
> >> +		PIN_SLP(mp03-3, OUT0, NONE);
> >> +		PIN_SLP(mp03-4, INPUT, NONE);
> >> +		PIN_SLP(mp03-5, OUT0, NONE);
> >> +		PIN_SLP(mp03-6, INPUT, DOWN);
> >> +		PIN_SLP(mp03-7, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(mp04-0, INPUT, DOWN);
> >> +		PIN_SLP(mp04-1, OUT0, NONE);
> >> +		PIN_SLP(mp04-2, INPUT, DOWN);
> >> +		PIN_SLP(mp04-3, OUT0, NONE);
> >> +		PIN_SLP(mp04-4, INPUT, DOWN);
> >> +		PIN_SLP(mp04-5, INPUT, DOWN);
> >> +		PIN_SLP(mp04-6, OUT0, NONE);
> >> +		PIN_SLP(mp04-7, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(mp05-0, INPUT, NONE);
> >> +		PIN_SLP(mp05-1, INPUT, NONE);
> >> +		PIN_SLP(mp05-2, INPUT, NONE);
> >> +		PIN_SLP(mp05-3, INPUT, NONE);
> >> +		PIN_SLP(mp05-4, INPUT, DOWN);
> >> +		PIN_SLP(mp05-5, OUT0, NONE);
> >> +		PIN_SLP(mp05-6, INPUT, DOWN);
> >> +		PIN_SLP(mp05-7, PREV, NONE);
> >> +
> >> +		PIN_SLP(mp06-0, INPUT, DOWN);
> >> +		PIN_SLP(mp06-1, INPUT, DOWN);
> >> +		PIN_SLP(mp06-2, INPUT, DOWN);
> >> +		PIN_SLP(mp06-3, INPUT, DOWN);
> >> +		PIN_SLP(mp06-4, INPUT, DOWN);
> >> +		PIN_SLP(mp06-5, INPUT, DOWN);
> >> +		PIN_SLP(mp06-6, INPUT, DOWN);
> >> +		PIN_SLP(mp06-7, INPUT, DOWN);
> >> +
> >> +		PIN_SLP(mp07-0, INPUT, DOWN);
> >> +		PIN_SLP(mp07-1, INPUT, DOWN);
> >> +		PIN_SLP(mp07-2, INPUT, DOWN);
> >> +		PIN_SLP(mp07-3, INPUT, DOWN);
> >> +		PIN_SLP(mp07-4, INPUT, DOWN);
> >> +		PIN_SLP(mp07-5, INPUT, DOWN);
> >> +		PIN_SLP(mp07-6, INPUT, DOWN);
> >> +		PIN_SLP(mp07-7, INPUT, DOWN);
> >> +	};
> > 
> > What about gphX?
> 
> The gphX pins are in the alive area and don't have power down configs, they retain their
> state over suspend.  Therefore the samsung,pin-con-pdn and samsung,pin-pud-pdn properties
> have no effect (they're analogous to the gpxX pins in later Samsung SoCs).

Ah, good, thanks.

Best regards,
Krzysztof

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