linux-kernel - Re: [PATCH v2 01/11] soc: qcom: Add device tree binding for SMEM

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Message-ID: <559DB8B2.2090202@codeaurora.org>
Date:	Wed, 08 Jul 2015 16:56:34 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	bjorn@...o.se, Andy Gross <agross@...eaurora.org>,
	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>
CC:	Jeffrey Hugo <jhugo@...eaurora.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v2 01/11] soc: qcom: Add device tree binding for SMEM

On 06/26/2015 02:50 PM, bjorn@...o.se wrote:
> += EXAMPLE
> +The following example shows the SMEM setup for MSM8974, with a main SMEM region
> +at 0xfa00000 and an auxiliary region at 0xfc428000:
> +
> +	reserved-memory {
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges;
> +
> +		smem_region: smem@...0000 {
> +			reg = <0xfa00000 0x200000>;
> +			no-map;
> +		};
> +	};
> +
> +	smem@...0000 {

This should be smem@...28000 matching the first reg property. It's weird
though, because if smem is using a secondary region it will be under the
SoC node and have a reg property. Otherwise it would be directly under
the root node and only have a memory-region. It would be nice if we
could somehow move the rpm message ram (0xfc428000) into the
reserved-memory node so that we could use memory-region for both regions.

> +		compatible = "qcom,smem";
> +
> +		memory-region = <&smem_region>;
> +		reg = <0xfc428000 0x4000>;
> +
> +		hwlocks = <&tcsr_mutex 3>;
> +	};


-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

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