diff mbox series

[v2,01/10] dt-bindings: display: bridge: tc358775: make stby gpio and vdd supplies optional

Message ID 20231202075514.44474-2-tony@atomide.com
State Changes Requested
Headers show
Series Improvments for tc358775 with support for tc358765 | expand

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Commit Message

Tony Lindgren Dec. 2, 2023, 7:54 a.m. UTC 
From: Michael Walle <mwalle@kernel.org>

For a normal operation, the vdd supplies nor the stby GPIO is needed.
There are boards, where these voltages are statically enabled during
board power-up.

The reset pin is required because once the PPI (PHY protocol interface)
is started, it can only be stopped by asserting the reset pin.

Signed-off-by: Michael Walle <mwalle@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 .../devicetree/bindings/display/bridge/toshiba,tc358775.yaml   | 3 ---
 1 file changed, 3 deletions(-)

Comments

Krzysztof Kozlowski Dec. 3, 2023, 4:49 p.m. UTC | #1 
On 02/12/2023 08:54, Tony Lindgren wrote:
> From: Michael Walle <mwalle@kernel.org>
> 
> For a normal operation, the vdd supplies nor the stby GPIO is needed.
> There are boards, where these voltages are statically enabled during
> board power-up.

This means supply is still required.

> 
> The reset pin is required because once the PPI (PHY protocol interface)
> is started, it can only be stopped by asserting the reset pin.
> 
> Signed-off-by: Michael Walle <mwalle@kernel.org>
> Signed-off-by: Tony Lindgren <tony@atomide.com>
> ---


Best regards,
Krzysztof
Michael Walle Dec. 4, 2023, 9:33 a.m. UTC | #2 
>> For a normal operation, the vdd supplies nor the stby GPIO is needed.
>> There are boards, where these voltages are statically enabled during
>> board power-up.
> 
> This means supply is still required.

You mean using fixed-regulator? I didn't consider that. But yes, you're
right.

-michael
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/display/bridge/toshiba,tc358775.yaml b/Documentation/devicetree/bindings/display/bridge/toshiba,tc358775.yaml
--- a/Documentation/devicetree/bindings/display/bridge/toshiba,tc358775.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/toshiba,tc358775.yaml
@@ -68,9 +68,6 @@  properties:
 required:
   - compatible
   - reg
-  - vdd-supply
-  - vddio-supply
-  - stby-gpios
   - reset-gpios
   - ports