linux-kernel - Re: [PATCH] ARM: zynq: dt: Add a fixed regulator for CPU voltage

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Date:	Thu, 15 May 2014 07:57:35 -0700
From:	Sören Brinkmann <soren.brinkmann@...inx.com>
To:	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>,
	Michal Simek <michal.simek@...inx.com>
CC:	<devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <git@...inx.com>
Subject: Re: [PATCH] ARM: zynq: dt: Add a fixed regulator for CPU voltage

ping? Any comments?

	Thanks,
	Sören

On Fri, 2014-05-02 at 02:07PM -0700, Soren Brinkmann wrote:
> To silence the warning
> 	cpufreq_cpu0: failed to get cpu0 regulator: -19
> from the cpufreq driver regarding a missing regulator,
> add a fixed regulator to the DT.
> Zynq does not support voltage scaling and the CPU rail should always be
> supplied with 1 V, hence it is added in the SOC-level dtsi.
> 
> Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
> ---
> 
>  arch/arm/boot/dts/zynq-7000.dtsi | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/zynq-7000.dtsi b/arch/arm/boot/dts/zynq-7000.dtsi
> index c1176abc34d9..64779f9d5c38 100644
> --- a/arch/arm/boot/dts/zynq-7000.dtsi
> +++ b/arch/arm/boot/dts/zynq-7000.dtsi
> @@ -25,6 +25,7 @@
>  			reg = <0>;
>  			clocks = <&clkc 3>;
>  			clock-latency = <1000>;
> +			cpu0-supply = <&regulator_vccpint>;
>  			operating-points = <
>  				/* kHz    uV */
>  				666667  1000000
> @@ -48,6 +49,15 @@
>  		reg = < 0xf8891000 0x1000 0xf8893000 0x1000 >;
>  	};
>  
> +	regulator_vccpint: fixedregulator@0 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "VCCPINT";
> +		regulator-min-microvolt = <1000000>;
> +		regulator-max-microvolt = <1000000>;
> +		regulator-boot-on;
> +		regulator-always-on;
> +	};
> +
>  	amba {
>  		compatible = "simple-bus";
>  		#address-cells = <1>;
> -- 
> 1.9.2.1.g06c4abd
> 
> 

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