diff mbox series

[V3,08/13] dt-bindings: imx: gpcv2: add support for optional resets

Message ID 20210510040045.13225-9-peng.fan@oss.nxp.com (mailing list archive)
State New, archived
Headers show
Series soc: imx: gpcv2: support i.MX8MM | expand

Commit Message

Peng Fan (OSS) May 10, 2021, 4 a.m. UTC 
From: Lucas Stach <l.stach@pengutronix.de>

For some domains the resets of the devices in the domain are not
automatically triggered. Add an optional resets property to allow
the GPC driver to trigger those resets explicitly.

The resets belong to devices located inside the power domain,
which need to be held in reset across the power-up sequence. So we
have no means to specify what each reset is in a generic power-domain
binding. Same situation as with the clocks in this binding actually.

Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 .../devicetree/bindings/power/fsl,imx-gpcv2.yaml       | 10 ++++++++++
 1 file changed, 10 insertions(+)

Comments

Rob Herring May 10, 2021, 4:19 p.m. UTC | #1 
On Mon, 10 May 2021 12:00:40 +0800, Peng Fan (OSS) wrote:
> From: Lucas Stach <l.stach@pengutronix.de>
> 
> For some domains the resets of the devices in the domain are not
> automatically triggered. Add an optional resets property to allow
> the GPC driver to trigger those resets explicitly.
> 
> The resets belong to devices located inside the power domain,
> which need to be held in reset across the power-up sequence. So we
> have no means to specify what each reset is in a generic power-domain
> binding. Same situation as with the clocks in this binding actually.
> 
> Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de>
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  .../devicetree/bindings/power/fsl,imx-gpcv2.yaml       | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml
index a96e6dbf1858..eb248f24dce6 100644
--- a/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml
+++ b/Documentation/devicetree/bindings/power/fsl,imx-gpcv2.yaml
@@ -66,6 +66,16 @@  properties:
 
           power-supply: true
 
+          resets:
+            description: |
+              A number of phandles to resets that need to be asserted during
+              power-up sequencing of the domain. The resets belong to devices
+              located inside the power domain, which need to be held in reset
+              across the power-up sequence. So no means to specify what each
+              reset is in a generic power-domain binding.
+            minItems: 1
+            maxItems: 4
+
         required:
           - '#power-domain-cells'
           - reg