linux-kernel - Re: [PATCH v2 17/18] arm: dts: owl-s500-roseapplepi: Add I2C pinctrl configuration

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Message-ID: <20201129193541.GB748744@BV030612LT>
Date:   Sun, 29 Nov 2020 21:35:41 +0200
From:   Cristian Ciocaltea <cristian.ciocaltea@...il.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Andreas Färber <afaerber@...e.de>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-actions@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 17/18] arm: dts: owl-s500-roseapplepi: Add I2C pinctrl
 configuration

On Sat, Nov 28, 2020 at 01:11:08PM +0530, Manivannan Sadhasivam wrote:
> On Fri, Nov 20, 2020 at 01:56:11AM +0200, Cristian Ciocaltea wrote:
> > Add pinctrl definitions for the I2C controllers used in RoseapplePi SBC.
> > For the moment enable only I2C0, which is used by the ATC2603C PMIC.
> > 
> > Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...il.com>
> 
> Earlier we used to add "_default" suffix for the pin groups to
> differentiate between active and sleep states. But I guess we can just
> keep the suffix away until we hit usecase.

I had actually used this suffix when I submitted the first revision of
the S500 pinctrl driver, but I dropped it later in the review process
since it was considered an uncommon approach:
https://lore.kernel.org/lkml/CAL_Jsq+8bX5duv=116e=hve1L-h8a=5quqCHVtSAs4PjK6xc1w@mail.gmail.com/

Thanks,
Cristi

> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> 
> Thanks,
> Mani
> 
> > ---
> >  arch/arm/boot/dts/owl-s500-roseapplepi.dts | 44 ++++++++++++++++++++++
> >  1 file changed, 44 insertions(+)
> > 
> > diff --git a/arch/arm/boot/dts/owl-s500-roseapplepi.dts b/arch/arm/boot/dts/owl-s500-roseapplepi.dts
> > index fe9ae3619422..ff91561ca99c 100644
> > --- a/arch/arm/boot/dts/owl-s500-roseapplepi.dts
> > +++ b/arch/arm/boot/dts/owl-s500-roseapplepi.dts
> > @@ -37,7 +37,51 @@ sd_vcc: sd-vcc {
> >  	};
> >  };
> >  
> > +&i2c0 {
> > +	status = "okay";
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&i2c0_pins>;
> > +};
> > +
> > +&i2c1 {
> > +	status = "disabled";
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&i2c1_pins>;
> > +};
> > +
> > +&i2c2 {
> > +	status = "disabled";
> > +	pinctrl-names = "default";
> > +	pinctrl-0 = <&i2c2_pins>;
> > +};
> > +
> >  &pinctrl {
> > +	i2c0_pins: i2c0-pins {
> > +		pinmux {
> > +			groups = "i2c0_mfp";
> > +			function = "i2c0";
> > +		};
> > +
> > +		pinconf {
> > +			pins = "i2c0_sclk", "i2c0_sdata";
> > +			bias-pull-up;
> > +		};
> > +	};
> > +
> > +	i2c1_pins: i2c1-pins {
> > +		pinconf {
> > +			pins = "i2c1_sclk", "i2c1_sdata";
> > +			bias-pull-up;
> > +		};
> > +	};
> > +
> > +	i2c2_pins: i2c2-pins {
> > +		pinconf {
> > +			pins = "i2c2_sclk", "i2c2_sdata";
> > +			bias-pull-up;
> > +		};
> > +	};
> > +
> >  	mmc0_pins: mmc0-pins {
> >  		pinmux {
> >  			groups = "sd0_d0_mfp", "sd0_d1_mfp", "sd0_d2_d3_mfp",
> > -- 
> > 2.29.2
> >