linux-kernel - Re: [PATCH] ARM: dts: bcm28155-ap: leave camldo1 on to fix reboot

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Date:	Wed, 12 Mar 2014 08:16:19 -0500
From:	Alex Elder <elder@...e.org>
To:	Matt Porter <mporter@...aro.org>, Alex Elder <elder@...aro.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>
CC:	Mark Brown <broonie@...nel.org>,
	Christian Daudt <bcm@...thebug.org>,
	Devicetree List <devicetree@...r.kernel.org>,
	bcm-kernel-feedback-list@...adcom.com,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ARM: dts: bcm28155-ap: leave camldo1 on to fix reboot

On 03/12/2014 08:14 AM, Matt Porter wrote:
> The BCM28155-AP board has a bootloader that expects the camldo1
> regulator to be enabled on entry. Currently, the camldo1 regulator
> is disabled when no longer in use as is the case during a reboot /
> warm reset. This causes the early bootloader to hang upon entry. Add
> regulator-always-on to the camldo1 constraint to fix reboot.
> 
> Reported-by: Alex Elder <elder@...aro.org>
> Signed-off-by: Matt Porter <mporter@...aro.org>

Tested-by: Alex Elder <elder@...aro.org>

> ---
> [Depends on BCM59056 regulator series dts support:
>  http://www.gossamer-threads.com/lists/linux/kernel/1885489]
> 
>  arch/arm/boot/dts/bcm28155-ap.dts | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/boot/dts/bcm28155-ap.dts b/arch/arm/boot/dts/bcm28155-ap.dts
> index 99ff0c1..cc1303c 100644
> --- a/arch/arm/boot/dts/bcm28155-ap.dts
> +++ b/arch/arm/boot/dts/bcm28155-ap.dts
> @@ -94,6 +94,7 @@
>  		camldo1_reg: camldo1 {
>  			regulator-min-microvolt = <3300000>;
>  			regulator-max-microvolt = <3300000>;
> +			regulator-always-on;
>  		};
>  
>  		sdldo_reg: sdldo {
> 

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