Hello Rob, Jesse, All,

Il giorno 3 nov 2021, alle ore 01:49, Rob Herring [off-list ref] ha scritto:

On Mon, Nov 1, 2021 at 6:34 PM Jesse Taube [off-list ref] wrote:

quoted

quoted

On 11/1/21 16:13, Rob Herring wrote:
On Sun, Oct 24, 2021 at 11:40:22AM -0400, Jesse Taube wrote:

quoted

Add i.MXRT documentation for compatible string.

Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Jesse Taube <redacted>
---
Documentation/devicetree/bindings/serial/fsl-lpuart.yaml | 1 +
1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml b/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml
index a90c971b4f1f..4b4340def2aa 100644
--- a/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml
+++ b/Documentation/devicetree/bindings/serial/fsl-lpuart.yaml

@@ -21,6 +21,7 @@ properties:
          - fsl,ls1028a-lpuart
          - fsl,imx7ulp-lpuart
          - fsl,imx8qm-lpuart
+          - fsl,imxrt-lpuart

Actually, 'rt' is not a single part is it? If the variations are same
die, but fused off then no need to distinguish. Otherwise, these should
be SoC specific.

I don't exactly know what "but fused off" means I would assume
disconnected but on-die?

Right. Or not pinned out is another possibility.

quoted

The imxrtxxx is a series that has the same UART
controller across them. Should I add ACK?

Looking at the errata docs briefly, there's at least 2 die as some of
the errata docs give the mask id. So they aren't necessarily 'the
same'.

Thank you for pointing, we’ve missed this particular.

You want the compatible strings to be specific enough to handle
any differences or errata. If you only care about the imxrt1050, then
I'd just use that and move on.

We plan to add from imxrt1020 to imxrt1170 and eventual new SoC, so we definitely need separate
.compatible strings.

@Jesse, can you please update with ‘fsl,imxrt1050”?

Otherwise, maybe someone from NXP wants
to comment?

Any NXP comment is welcome!

Best regards
Giulio Benetti
Benetti engineering sas

Rob

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