Re: [PATCH 1/6] dt-bindings: regulator: pca9450: Document new usage of sd-vsel-gpios

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On 2/15/23 21:02, Rob Herring wrote:
On Mon, Feb 13, 2023 at 04:58:19PM +0100, Frieder Schrempf wrote:
From: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>

The sd-vsel-gpios property is abandoned in its current meaning as an
output. We now use it to specify an optional signal that can be
evaluated by the driver in order to retrieve the current status
of the SD_VSEL signal that is used to select the control register
of LDO5.

Signed-off-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
---
  .../regulator/nxp,pca9450-regulator.yaml      | 23 ++++++++++++++-----
  1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml b/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml
index 835b53302db8..c86534538a4e 100644
--- a/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml
+++ b/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml
@@ -40,8 +40,24 @@ properties:
      description: |
        list of regulators provided by this controller
+ properties:
+      LDO5:
+        type: object
+        $ref: regulator.yaml#
+        description:
+          Properties for single LDO5 regulator.
+
+        properties:
+          sd-vsel-gpios:

It is a pin on the device, right? Then it belongs in the device node as
it was.

Can't the direction of the signal tell you how it is used? Assuming the
pin is bidirectional?

The pin is input to the PMIC, it is unidirection, i.e.

SoC(output)---->(input)PMIC

The binding should support any possible way the device is wired, not
just what's been seen so far on some boards.

The usage is always the above as far as I can tell.



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