linux-kernel - Re: [PATCH v2 1/1] ARM: dts: sun7i: Enable axp209 driver on olinuxino lime2

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Date:	Thu, 10 Sep 2015 20:13:15 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Olliver Schinagl <o.schinagl@...imaker.com>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/1] ARM: dts: sun7i: Enable axp209 driver on
 olinuxino lime2

Hi Oliver,

On Wed, Sep 09, 2015 at 03:26:44PM +0200, Olliver Schinagl wrote:
> The Olimex OLinuXino Lime2 uses the same AXP209 as was recently
> introduced this driver for its power regulation.
> 
> Signed-off-by: Olliver Schinagl <o.schinagl@...imaker.com>
> ---
>  arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts | 87 +++++++++----------------
>  1 file changed, 31 insertions(+), 56 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts b/arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts
> index d5c796c..dd90a1d 100644
> --- a/arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts
> +++ b/arch/arm/boot/dts/sun7i-a20-olinuxino-lime2.dts
> @@ -71,14 +71,6 @@
>  			default-state = "on";
>  		};
>  	};
> -
> -	reg_axp_ipsout: axp_ipsout {
> -		compatible = "regulator-fixed";
> -		regulator-name = "axp-ipsout";
> -		regulator-min-microvolt = <5000000>;
> -		regulator-max-microvolt = <5000000>;
> -		regulator-always-on;
> -	};

Why are you removing that regulator?

>  };
>  
>  &ahci {
> @@ -86,6 +78,10 @@
>  	status = "okay";
>  };
>  
> +&cpu0 {
> +	cpu-supply = <&reg_dcdc2>;
> +};
> +
>  &ehci0 {
>  	status = "okay";
>  };
> @@ -112,57 +108,9 @@
>  	status = "okay";
>  
>  	axp209: pmic@34 {
> -		compatible = "x-powers,axp209";
>  		reg = <0x34>;
>  		interrupt-parent = <&nmi_intc>;
>  		interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> -
> -		interrupt-controller;
> -		#interrupt-cells = <1>;
> -
> -		acin-supply = <&reg_axp_ipsout>;
> -		vin2-supply = <&reg_axp_ipsout>;
> -		vin3-supply = <&reg_axp_ipsout>;
> -		ldo24in-supply = <&reg_axp_ipsout>;
> -		ldo3in-supply = <&reg_axp_ipsout>;

And these supplies?

> -		regulators {
> -			vdd_rtc: ldo1 {
> -				regulator-min-microvolt = <1300000>;
> -				regulator-max-microvolt = <1300000>;
> -				regulator-always-on;
> -			};
> -
> -			avcc: ldo2 {
> -				regulator-min-microvolt = <1800000>;
> -				regulator-max-microvolt = <3300000>;
> -				regulator-always-on;
> -			};
> -
> -			vcc_csi0: ldo3 {
> -				regulator-min-microvolt = <700000>;
> -				regulator-max-microvolt = <3500000>;
> -				regulator-always-on;
> -			};
> -
> -			vcc_csi1: ldo4 {
> -				regulator-min-microvolt = <1250000>;
> -				regulator-max-microvolt = <3300000>;
> -				regulator-always-on;
> -			};
> -
> -			vdd_cpu: dcdc2 {
> -				regulator-min-microvolt = <700000>;
> -				regulator-max-microvolt = <2275000>;
> -				regulator-always-on;
> -			};
> -
> -			vdd_int: dcdc3 {
> -				regulator-min-microvolt = <700000>;
> -				regulator-max-microvolt = <3500000>;
> -				regulator-always-on;
> -			};
> -		};
>  	};
>  };
>  
> @@ -243,6 +191,33 @@
>  	status = "okay";
>  };
>  
> +#include "axp209.dtsi"
> +
> +&reg_dcdc2 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <1000000>;
> +	regulator-max-microvolt = <1450000>;

This is outside of the operating voltages of the CPU.

> +	regulator-name = "vdd-cpu";
> +};
> +
> +&reg_dcdc3 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <1000000>;
> +	regulator-max-microvolt = <1400000>;
> +	regulator-name = "vdd-int-dll";
> +};
> +
> +&reg_ldo1 {
> +	regulator-name = "vdd-rtc";
> +};
> +
> +&reg_ldo2 {
> +	regulator-always-on;
> +	regulator-min-microvolt = <3000000>;
> +	regulator-max-microvolt = <3000000>;
> +	regulator-name = "avcc";

You're changing the boundaries, why?

> +};
> +
>  &reg_usb0_vbus {
>  	pinctrl-0 = <&usb0_vbus_pin_lime2>;
>  	gpio = <&pio 2 17 GPIO_ACTIVE_HIGH>;
> -- 
> 2.1.4

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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