On Mon, Apr 07, 2014 at 10:54:07PM +0100, tthayer@xxxxxxxxxx wrote:
> From: Thor Thayer <tthayer@xxxxxxxxxx>
>
> Addition of the Altera SDRAM controller bindings and device
> tree changes to the Altera SoC project.
>
> Signed-off-by: Thor Thayer <tthayer@xxxxxxxxxx>
> To: Rob Herring <robherring2@xxxxxxxxx>
> To: Pawel Moll <pawel.moll@xxxxxxx>
> To: Mark Rutland <mark.rutland@xxxxxxx>
> To: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
> To: Kumar Gala <galak@xxxxxxxxxxxxxx>
> To: Rob Landley <rob@xxxxxxxxxxx>
> To: Russell King <linux@xxxxxxxxxxxxxxxx>
> To: Dinh Nguyen <dinguyen@xxxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: linux-doc@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> ---
> .../bindings/arm/altera/socfpga-sdram.txt | 14 ++++++++++++++
> arch/arm/boot/dts/socfpga.dtsi | 5 +++++
> 2 files changed, 19 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/arm/altera/socfpga-sdram.txt
>
> diff --git a/Documentation/devicetree/bindings/arm/altera/socfpga-sdram.txt b/Documentation/devicetree/bindings/arm/altera/socfpga-sdram.txt
> new file mode 100644
> index 0000000..525cb76
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/altera/socfpga-sdram.txt
> @@ -0,0 +1,14 @@
> +Altera SOCFPGA SDRAM Controller
> +
> +Required properties:
> +- compatible : "altr,sdr-ctl", "syscon";
> + Note that syscon is invoked for this device to support the FPGA
> + bridge driver, EDAC driver and other devices that share the
> + registers.
Is the SDRAM controller really a bag of bits that necessitates the use
of syscon? Or are the "other devices" just sub-components of the SDRAM
controller?
If they are, just describe the SDRAM controller and related interrupts
as a single node, and only use the EDAC portion in the Linux driver.
Cheers,
Mark.
> +- reg : Should contain 1 register ranges(address and length)
> +
> +Example:
> + sdrctl@ffc25000 {
> + compatible = "altr,sdr-ctl", "syscon";
> + reg = <0xffc25000 0x1000>;
> + };
> diff --git a/arch/arm/boot/dts/socfpga.dtsi b/arch/arm/boot/dts/socfpga.dtsi
> index df43702..6ce912e 100644
> --- a/arch/arm/boot/dts/socfpga.dtsi
> +++ b/arch/arm/boot/dts/socfpga.dtsi
> @@ -676,6 +676,11 @@
> clocks = <&l4_sp_clk>;
> };
>
> + sdrctl@ffc25000 {
> + compatible = "altr,sdr-ctl", "syscon";
> + reg = <0xffc25000 0x1000>;
> + };
> +
> rstmgr@ffd05000 {
> compatible = "altr,rst-mgr";
> reg = <0xffd05000 0x1000>;
> --
> 1.7.9.5
>
>
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