Synopsys DesignWare Ethernet controllers can be synthesized with
General-Purpose IOs support. GPIOs can work either as inputs or as outputs
thus belong to the gpi_i and gpo_o ports respectively. The ports width
(number of possible inputs/outputs) and the configuration registers layout
depend on the IP-core version. For instance, DW GMAC can have from 0 to 4
GPIs and from 0 to 4 GPOs, while DW xGMAC have a wider ports width up to
16 pins of each one.
So the DW MAC DT-node can be equipped with "ngpios" property, which can't
have a value greater than 32, standard GPIO-related properties like
"gpio-controller" and "#gpio-cells", and, if GPIs are supposed to be
detected, IRQ-controller related properties.
Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>
---
.../devicetree/bindings/net/snps,dwmac.yaml | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index bdc437b14878..fcca23d3727e 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -110,6 +110,23 @@ properties:
reset-names:
const: stmmaceth
+ ngpios:
+ description:
+ Total number of GPIOs the MAC supports. The property shall include both
+ the GPI and GPO ports width.
+ minimum: 1
+ maximum: 32
+
+ gpio-controller: true
+
+ "#gpio-cells":
+ const: 2
+
+ interrupt-controller: true
+
+ "#interrupt-cells":
+ const: 2
+
mac-mode:
$ref: ethernet-controller.yaml#/properties/phy-connection-type
description:
--
2.29.2
