[PATCH v9 1/5] Documentation: Add device tree bindings for Freescale i.MX GPC

[Shawn Guo]

On Mon, Feb 23, 2015 at 06:40:11PM +0100, Philipp Zabel wrote:
> The i.MX6 contains a power controller that controls power gating and
> sequencing for the SoC's power domains.
> 
> Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>

The patch (series) looks fine to me.  Can we get DT maintainer's ACK on
this, so that I can apply the series for 4.1?

Shawn

> ---
> Changes since v8:
>  - Updated example with IRQ_TYPE_... and IMX6QDL_CLK_... defines
> ---
>  .../devicetree/bindings/power/fsl,imx-gpc.txt      | 59 ++++++++++++++++++++++
>  1 file changed, 59 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/fsl,imx-gpc.txt
> 
> diff --git a/Documentation/devicetree/bindings/power/fsl,imx-gpc.txt b/Documentation/devicetree/bindings/power/fsl,imx-gpc.txt
> new file mode 100644
> index 0000000..65cc034
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/fsl,imx-gpc.txt
> @@ -0,0 +1,59 @@
> +Freescale i.MX General Power Controller
> +=======================================
> +
> +The i.MX6Q General Power Control (GPC) block contains DVFS load tracking
> +counters and Power Gating Control (PGC) for the CPU and PU (GPU/VPU) power
> +domains.
> +
> +Required properties:
> +- compatible: Should be "fsl,imx6q-gpc" or "fsl,imx6sl-gpc"
> +- reg: should be register base and length as documented in the
> +  datasheet
> +- interrupts: Should contain GPC interrupt request 1
> +- pu-supply: Link to the LDO regulator powering the PU power domain
> +- clocks: Clock phandles to devices in the PU power domain that need
> +	  to be enabled during domain power-up for reset propagation.
> +- #power-domain-cells: Should be 1, see below:
> +
> +The gpc node is a power-controller as documented by the generic power domain
> +bindings in Documentation/devicetree/bindings/power/power_domain.txt.
> +
> +Example:
> +
> +	gpc: gpc at 020dc000 {
> +		compatible = "fsl,imx6q-gpc";
> +		reg = <0x020dc000 0x4000>;
> +		interrupts = <0 89 IRQ_TYPE_LEVEL_HIGH>,
> +			     <0 90 IRQ_TYPE_LEVEL_HIGH>;
> +		pu-supply = <&reg_pu>;
> +		clocks = <&clks IMX6QDL_CLK_GPU3D_CORE>,
> +			 <&clks IMX6QDL_CLK_GPU3D_SHADER>,
> +			 <&clks IMX6QDL_CLK_GPU2D_CORE>,
> +			 <&clks IMX6QDL_CLK_GPU2D_AXI>,
> +			 <&clks IMX6QDL_CLK_OPENVG_AXI>,
> +			 <&clks IMX6QDL_CLK_VPU_AXI>;
> +		#power-domain-cells = <1>;
> +	};
> +
> +
> +Specifying power domain for IP modules
> +======================================
> +
> +IP cores belonging to a power domain should contain a 'power-domains' property
> +that is a phandle pointing to the gpc device node and a DOMAIN_INDEX specifying
> +the power domain the device belongs to.
> +
> +Example of a device that is part of the PU power domain:
> +
> +	vpu: vpu at 02040000 {
> +		reg = <0x02040000 0x3c000>;
> +		/* ... */
> +		power-domains = <&gpc 1>;
> +		/* ... */
> +	};
> +
> +The following DOMAIN_INDEX values are valid for i.MX6Q:
> +ARM_DOMAIN     0
> +PU_DOMAIN      1
> +The following additional DOMAIN_INDEX value is valid for i.MX6SL:
> +DISPLAY_DOMAIN 2
> -- 
> 2.1.4
>