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Message-ID: <20241002-stingily-condone-576e948e6d67@spud>
Date: Wed, 2 Oct 2024 11:47:59 +0100
From: Conor Dooley <conor@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: conor@...nel.org,
Conor Dooley <conor.dooley@...rochip.com>,
Daire McNamara <daire.mcnamara@...rochip.com>,
pierre-henry.moussay@...rochip.com,
valentina.fernandezalanis@...rochip.com,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Jassi Brar <jassisinghbrar@...il.com>,
Lee Jones <lee@...nel.org>,
Paul Walmsley <paul.walmsley@...ive.com>,
Palmer Dabbelt <palmer@...belt.com>,
Albert Ou <aou@...s.berkeley.edu>,
Neil Armstrong <neil.armstrong@...aro.org>,
Jerome Brunet <jbrunet@...libre.com>,
Kevin Hilman <khilman@...libre.com>,
Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
linux-riscv@...ts.infradead.org,
linux-clk@...r.kernel.org,
devicetree@...r.kernel.org,
linux-amlogic@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v1 01/11] dt-bindings: mailbox: mpfs: fix reg properties
From: Conor Dooley <conor.dooley@...rochip.com>
When the binding for this was originally written, and later modified,
mistakes were made - and the precise nature of the later modification
should have been a giveaway, but alas I was naive at the time.
A more correct modelling of the hardware is to use two syscons and have
a single reg entry for the mailbox, containing the mailbox region. The
two syscons contain the general control/status registers for the mailbox
and the interrupt related registers respectively. The reason for two
syscons is that the same mailbox is present on the non-SoC version of
the FPGA, which has no interrupt controller, and the shared part of the
rtl was unchanged between devices.
This is now coming to a head, because the control/status registers share
a register region with the "tvs" (temperature & voltage sensors)
registers and, as it turns out, people do want to monitor temperatures
and voltages...
Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
---
.../bindings/mailbox/microchip,mpfs-mailbox.yaml | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/mailbox/microchip,mpfs-mailbox.yaml b/Documentation/devicetree/bindings/mailbox/microchip,mpfs-mailbox.yaml
index 404477910f029..1332aab9a888f 100644
--- a/Documentation/devicetree/bindings/mailbox/microchip,mpfs-mailbox.yaml
+++ b/Documentation/devicetree/bindings/mailbox/microchip,mpfs-mailbox.yaml
@@ -15,6 +15,8 @@ properties:
reg:
oneOf:
+ - items:
+ - description: mailbox data registers
- items:
- description: mailbox control & data registers
- description: mailbox interrupt registers
@@ -23,6 +25,7 @@ properties:
- description: mailbox control registers
- description: mailbox interrupt registers
- description: mailbox data registers
+ deprecated: true
interrupts:
maxItems: 1
@@ -41,12 +44,12 @@ additionalProperties: false
examples:
- |
soc {
- #address-cells = <2>;
- #size-cells = <2>;
- mbox: mailbox@...20000 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ mailbox@...20800 {
compatible = "microchip,mpfs-mailbox";
- reg = <0x0 0x37020000 0x0 0x58>, <0x0 0x2000318C 0x0 0x40>,
- <0x0 0x37020800 0x0 0x100>;
+ reg = <0x37020800 0x100>;
interrupt-parent = <&L1>;
interrupts = <96>;
#mbox-cells = <1>;
--
2.45.2
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