On 07/02/2022 20:07, Rob Herring wrote:
On Mon, Feb 07, 2022 at 04:26:28PM +0000, conor.dooley@xxxxxxxxxxxxx wrote:
From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Document mpfs-rng and mpfs-generic-service as subdevices of the system
controller.
Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Acked-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
---
.../microchip,mpfs-sys-controller.yaml | 35 +++++++++++++++++--
1 file changed, 33 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml b/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
index f699772fedf3..b02c8bd72605 100644
--- a/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
+++ b/Documentation/devicetree/bindings/soc/microchip/microchip,mpfs-sys-controller.yaml
@@ -13,7 +13,6 @@ description: |
The PolarFire SoC system controller is communicated with via a mailbox.
This document describes the bindings for the client portion of that mailbox.
-
properties:
mboxes:
maxItems: 1
@@ -21,6 +20,38 @@ properties:
compatible:
const: microchip,mpfs-sys-controller
+ rng:
+ type: object
+
+ description: |
+ The hardware random number generator on the Polarfire SoC is
+ accessed via the mailbox interface provided by the system controller
+
+ properties:
+ compatible:
+ const: microchip,mpfs-rng
+
+ required:
+ - compatible
+
+ sysserv:
+ type: object
+
+ description: |
+ The PolarFire SoC system controller is communicated with via a mailbox.
+ This binding represents several of the functions provided by the system
+ controller which do not belong in a specific subsystem, such as reading
+ the fpga device certificate, all of which follow the same format:
+ - a command + optional payload sent to the sys controller
+ - a status + a payload returned to Linux
+
+ properties:
+ compatible:
+ const: microchip,mpfs-generic-service
+
+ required:
+ - compatible
+
required:
- compatible
- mboxes
@@ -29,7 +60,7 @@ additionalProperties: false
examples:
- |
- syscontroller: syscontroller {
+ syscontroller {
compatible = "microchip,mpfs-sys-controller";
mboxes = <&mbox 0>;
Removing the child nodes in the example doesn't address my comment. You
still have them in the schema. IOW, this patch should be dropped unless
you have reasons for child nodes other than I want to partition the OS
drivers a certain way and creating DT nodes instantiates them for me.
Obviously dropping this patch doesn't prevent me from instantiating the
sub devices since it's not going to be done via DT anymore. Would you
rather I replaced this patch with one adding a link to the online
documentation [0] for them in the main description? I had left them in
as I wasn't sure if you wanted the descriptions dropped entirely or not.
And yes, partition of the services is why I had originally gone for
different drivers for the different aspects. Some of the services, like
the RNG or reprogramming the FPGA from Linux have obvious subsystems to
put them under, if it was just the eclectic mix of Microchip FPGA
specific items I'd have not bothered with the partitioning.
Cheers,
Conor.
[0]
https://onlinedocs.microchip.com/pr/GUID-1409CF11-8EF9-4C24-A94E-70979A688632-en-US-1/index.html
};
--
2.35.1
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