Subject: [PATCH] ARM: dts: exynos4210: Work around lack of cpufreq regulator lookup

From: [email-masked] (Tomasz Figa)
Date: Mon, 26 Aug 2013 19:13:28 +0200

On Tuesday 20 of August 2013 19:35:36 Tomasz Figa wrote:
> Exynos cpufreq drivers does not support device tree based regulator
> lookup, so it can get the VDD ARM regulator only by its name. To get
> cpufreq working for now, this patch works this around by renaming the
> regulator in board dts files to vdd_arm, which is the name expected by
> the driver.
> 
> Signed-off-by: Tomasz Figa <[email-masked]>
> Signed-off-by: Kyungmin Park <[email-masked]>
> ---
>  arch/arm/boot/dts/exynos4210-origen.dts | 7 ++++++-
>  arch/arm/boot/dts/exynos4210-trats.dts  | 7 ++++++-
>  2 files changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/exynos4210-origen.dts
> b/arch/arm/boot/dts/exynos4210-origen.dts index 382d8c7..46378fe 100644
> --- a/arch/arm/boot/dts/exynos4210-origen.dts
> +++ b/arch/arm/boot/dts/exynos4210-origen.dts
> @@ -192,7 +192,12 @@
>  				};
> 
>  				buck1_reg: BUCK1 {
> -					regulator-name = "VDD_ARM_1.2V";
> +					/*
> +					* HACK: The real name is VDD_ARM_1.2V,
> +					* but exynos-cpufreq does not support
> +					* DT-based regulator lookup yet.
> +					*/
> +					regulator-name = "vdd_arm";
>  					regulator-min-microvolt = <950000>;
>  					regulator-max-microvolt	= <1350000>;
>  					regulator-always-on;
> diff --git a/arch/arm/boot/dts/exynos4210-trats.dts
> b/arch/arm/boot/dts/exynos4210-trats.dts index 1c164f2..63cc571 100644
> --- a/arch/arm/boot/dts/exynos4210-trats.dts
> +++ b/arch/arm/boot/dts/exynos4210-trats.dts
> @@ -290,7 +290,12 @@
>  				};
> 
>  				varm_breg: BUCK1 {
> -				     regulator-name = "VARM_1.2V_C210";
> +				     /*
> +				      * HACK: The real name is VARM_1.2V_C210,
> +				      * but exynos-cpufreq does not support
> +				      * DT-based regulator lookup yet.
> +				      */
> +				     regulator-name = "vdd_arm";
>  				     regulator-min-microvolt = <900000>;
>  				     regulator-max-microvolt = <1350000>;
>  				     regulator-always-on;

Ping.

This patch fixes broken cpufreq on above two boards, so it would be nice to 
have it merged for 3.12, even if it's a bit hacky, since it's too late for 
proper solution at the moment. (It's already in development, though.)

Best regards,
Tomasz