[PATCH RFC 1/2] dt-bindings: simplefb: Support a list of regulator supply properties
From: mark.rutland@arm.com (Mark Rutland)
Date: 2015-10-12 17:10:25
Also in:
linux-devicetree, linux-fbdev, lkml
On Tue, Oct 13, 2015 at 01:04:17AM +0800, 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 is getting more complicated by the minute...
quoted hunk ↗ jump to hunk
Signed-off-by: Chen-Yu Tsai <redacted> --- .../devicetree/bindings/video/simple-framebuffer.txt | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)diff --git a/Documentation/devicetree/bindings/video/simple-framebuffer.txt b/Documentation/devicetree/bindings/video/simple-framebuffer.txt index 4474ef6e0b95..0cc43e1be8b5 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. +- num-supplies : The number of regulators used by the framebuffer. +- vinN-supply : The N-th (from 0) regulator used by the framebuffer.
I don't see why you need num-supplies. Why not just try probing
vin${N}-supply until such a property isn't present in the DT?
Thanks,
Mark.