On Thu, Jun 30, 2022 at 12:33 PM Krzysztof Kozlowski
[off-list ref] wrote:

On 30/06/2022 14:37, Viorel Suman (OSS) wrote:

quoted

On 22-06-29 19:53:51, Krzysztof Kozlowski wrote:

quoted

On 29/06/2022 18:44, Viorel Suman (OSS) wrote:

quoted

From: Abel Vesa <redacted>

In order to replace the fsl,scu txt file from bindings/arm/freescale,
we need to split it between the right subsystems. This patch documents
separately the 'iomux/pinctrl' child node of the SCU main node.

Signed-off-by: Abel Vesa <redacted>
Signed-off-by: Viorel Suman <redacted>
---
 .../bindings/pinctrl/fsl,scu-pinctrl.yaml     | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/fsl,scu-pinctrl.yaml

diff --git a/Documentation/devicetree/bindings/pinctrl/fsl,scu-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/fsl,scu-pinctrl.yaml
new file mode 100644
index 000000000000..76a2e7b28172
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/fsl,scu-pinctrl.yaml

[...]

quoted

quoted

+      fsl,pins:
+        description:
+          each entry consists of 3 integers and represents the pin ID, the mux value
+          and config setting for the pin. The first 2 integers - pin_id and mux_val - are
+          specified using a PIN_FUNC_ID macro, which can be found in
+          <include/dt-bindings/pinctrl/pads-imx8qxp.h>. The last integer CONFIG is
+          the pad setting value like pull-up on this pin. Please refer to the
+          appropriate i.MX8 Reference Manual for detailed CONFIG settings.
+        $ref: /schemas/types.yaml#/definitions/uint32-matrix

Look at fsl,imx8mq-pinctrl.yaml. Each item is described (items under items).

Added them initially, but later dropped because of some logs like
"pinctrl@xxxxxxx: usdhc1grp:fsl,pins:0: [...] is too long" shown by
"make dt_binding_check dtbs_check DT_SCHEMA_FILES=[...]/fsl,scu-pinctrl.yaml"

Same logs are shown for "fsl,imx8mq-pinctrl.yaml". Will add the items description in the next
version.

The fsl,imx8mq-pinctrl.yaml should be correct and I don't see the reason
why dtschema complains in some of the entries. It's like one define was
not correct... I'll take a look at this later, but anyway keep the same
as fsl,imx8mq-pinctrl.yaml even if it complains.

The issue is that 'fsl,pins' is problematic for the new dtb decoding
because it has a variable definition in terms of matrix bounds as each
i.MX platform has its own length (typ 5 or 6). The tools try to work
around it by figuring out which size fits. That works until there are
multiple answers which seems to be what's happening here.

The easiest solution I think is to just strip the constraints in
occurances of this property. I'll look into that.

Rob