From mboxrd@z Thu Jan  1 00:00:00 1970
From: s.nawrocki@samsung.com (Sylwester Nawrocki)
Date: Tue, 11 Jun 2013 10:49:33 +0200
Subject: [PATCH] ARM: dts: Removing pdma for SSDK5440
In-Reply-To: <109601ce6679$fef2e410$fcd8ac30$%kim@samsung.com>
References: <109601ce6679$fef2e410$fcd8ac30$%kim@samsung.com>
Message-ID: <51B6E49D.7000408@samsung.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On 06/11/2013 10:02 AM, Kukjin Kim wrote:
> From: Giridhar Maruthy <giridhar.m@samsung.com>
> 
> Since the pdma works only in secure mode, accessing the same
> in hypervisor mode gives an abort. As we are not using pdma
> anywhere (including spi), removing the same.
> 
> Signed-off-by: Giridhar Maruthy <giridhar.m@samsung.com>
> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

I was wondering, wouldn't it be sufficient to add status = "disabled";
in those pdma nodes, to avoid re-adding them in future ?
As for the DMA properties in the spi device nodes, they should indeed
be removed, as generic DMA bindings would be used instead.

Regards,
Sylwester
> ---
>  arch/arm/boot/dts/exynos5440.dtsi |   24 ------------------------
>  1 file changed, 24 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/exynos5440.dtsi b/arch/arm/boot/dts/exynos5440.dtsi
> index 871ebad..b08449e 100644
> --- a/arch/arm/boot/dts/exynos5440.dtsi
> +++ b/arch/arm/boot/dts/exynos5440.dtsi
> @@ -105,8 +105,6 @@
>  		compatible = "samsung,exynos4210-spi";Hmm, is there really no way to use PDMA in non-secure mode at all ?
>  		reg = <0xD0000 0x1000>;
>  		interrupts = <0 4 0>;
> -		tx-dma-channel = <&pdma0 5>; /* preliminary */
> -		rx-dma-channel = <&pdma0 4>; /* preliminary */
>  		#address-cells = <1>;
>  		#size-cells = <0>;
>  		clocks = <&clock 21>, <&clock 16>;
> @@ -184,28 +182,6 @@
>  		compatible = "arm,amba-bus";
>  		interrupt-parent = <&gic>;
>  		ranges;
> -
> -		pdma0: pdma at 00121000 {
> -			compatible = "arm,pl330", "arm,primecell";
> -			reg = <0x121000 0x1000>;
> -			interrupts = <0 46 0>;
> -			clocks = <&clock 8>;
> -			clock-names = "apb_pclk";
> -			#dma-cells = <1>;
> -			#dma-channels = <8>;
> -			#dma-requests = <32>;
> -		};
> -
> -		pdma1: pdma at 00120000 {
> -			compatible = "arm,pl330", "arm,primecell";
> -			reg = <0x120000 0x1000>;
> -			interrupts = <0 47 0>;
> -			clocks = <&clock 8>;
> -			clock-names = "apb_pclk";
> -			#dma-cells = <1>;
> -			#dma-channels = <8>;
> -			#dma-requests = <32>;
> -		};
>  	};