diff mbox

[RFC,v2,1/2] dt-bindings: simplefb: Support a list of regulator supply properties

Message ID 1445407141-16459-2-git-send-email-wens@csie.org
State New, archived
Headers show

Commit Message

Chen-Yu Tsai Oct. 21, 2015, 5:59 a.m. UTC
The physical display tied to the framebuffer may have regulators
providing power to it, such as power for LCDs or interface conversion
chips.

The number of regulators in use may vary, but the regulator supply
binding can not be a list. Work around this by adding a "num-supplies"
property to communicate the number of supplies, and a list of 0 ~ N
"vinN-supply" properties for the actual regulator supply.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 .../devicetree/bindings/video/simple-framebuffer.txt        | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

Comments

Hans de Goede Oct. 21, 2015, 7:50 a.m. UTC | #1
Hi,

On 21-10-15 07:59, Chen-Yu Tsai wrote:
> The physical display tied to the framebuffer may have regulators
> providing power to it, such as power for LCDs or interface conversion
> chips.
>
> The number of regulators in use may vary, but the regulator supply
> binding can not be a list. Work around this by adding a "num-supplies"
> property to communicate the number of supplies, and a list of 0 ~ N
> "vinN-supply" properties for the actual regulator supply.

This bit of the commit message is no longer accurate. Other then that
this patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@redhat.com>

Regards,

Hans


>
> Signed-off-by: Chen-Yu Tsai <wens@csie.org>
> ---
>   .../devicetree/bindings/video/simple-framebuffer.txt        | 13 +++++++++----
>   1 file changed, 9 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/video/simple-framebuffer.txt b/Documentation/devicetree/bindings/video/simple-framebuffer.txt
> index 4474ef6e0b95..8c9e9f515c87 100644
> --- a/Documentation/devicetree/bindings/video/simple-framebuffer.txt
> +++ b/Documentation/devicetree/bindings/video/simple-framebuffer.txt
> @@ -47,10 +47,14 @@ Required properties:
>     - a8b8g8r8 (32-bit pixels, d[31:24]=a, d[23:16]=b, d[15:8]=g, d[7:0]=r).
>
>   Optional properties:
> -- clocks : List of clocks used by the framebuffer. Clocks listed here
> -           are expected to already be configured correctly. The OS must
> -           ensure these clocks are not modified or disabled while the
> -           simple framebuffer remains active.
> +- clocks : List of clocks used by the framebuffer.
> +- *-supply : Any number of regulators used by the framebuffer. These should
> +	     be named according to the names in the device's design.
> +
> +  The above resources are expected to already be configured correctly.
> +  The OS must ensure they are not modified or disabled while the simple
> +  framebuffer remains active.
> +
>   - display : phandle pointing to the primary display hardware node
>
>   Example:
> @@ -68,6 +72,7 @@ chosen {
>   		stride = <(1600 * 2)>;
>   		format = "r5g6b5";
>   		clocks = <&ahb_gates 36>, <&ahb_gates 43>, <&ahb_gates 44>;
> +		lcd-supply = <&reg_dc1sw>;
>   		display = <&lcdc0>;
>   	};
>   	stdout-path = "display0";
>
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diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/video/simple-framebuffer.txt b/Documentation/devicetree/bindings/video/simple-framebuffer.txt
index 4474ef6e0b95..8c9e9f515c87 100644
--- a/Documentation/devicetree/bindings/video/simple-framebuffer.txt
+++ b/Documentation/devicetree/bindings/video/simple-framebuffer.txt
@@ -47,10 +47,14 @@  Required properties:
   - a8b8g8r8 (32-bit pixels, d[31:24]=a, d[23:16]=b, d[15:8]=g, d[7:0]=r).
 
 Optional properties:
-- clocks : List of clocks used by the framebuffer. Clocks listed here
-           are expected to already be configured correctly. The OS must
-           ensure these clocks are not modified or disabled while the
-           simple framebuffer remains active.
+- clocks : List of clocks used by the framebuffer.
+- *-supply : Any number of regulators used by the framebuffer. These should
+	     be named according to the names in the device's design.
+
+  The above resources are expected to already be configured correctly.
+  The OS must ensure they are not modified or disabled while the simple
+  framebuffer remains active.
+
 - display : phandle pointing to the primary display hardware node
 
 Example:
@@ -68,6 +72,7 @@  chosen {
 		stride = <(1600 * 2)>;
 		format = "r5g6b5";
 		clocks = <&ahb_gates 36>, <&ahb_gates 43>, <&ahb_gates 44>;
+		lcd-supply = <&reg_dc1sw>;
 		display = <&lcdc0>;
 	};
 	stdout-path = "display0";