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Subject[PATCH v2 1/3] dt-bindings: pinctrl: Add bindings for pinctrl-mchp-sgpio driver
Date
This adds DT bindings for the Microsemi/Microchip SGPIO controller,
bindings microchip,sparx5-sgpio, mscc,ocelot-sgpio and
mscc,luton-sgpio.

Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com>
---
.../pinctrl/microchip,sparx5-sgpio.yaml | 88 +++++++++++++++++++
include/dt-bindings/gpio/mchp-sgpio.h | 19 ++++
2 files changed, 107 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pinctrl/microchip,sparx5-sgpio.yaml
create mode 100644 include/dt-bindings/gpio/mchp-sgpio.h

diff --git a/Documentation/devicetree/bindings/pinctrl/microchip,sparx5-sgpio.yaml b/Documentation/devicetree/bindings/pinctrl/microchip,sparx5-sgpio.yaml
new file mode 100644
index 000000000000..25a50ba9e893
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/microchip,sparx5-sgpio.yaml
@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/microchip,sparx5-sgpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microsemi/Microchip Serial GPIO controller
+
+maintainers:
+ - Lars Povlsen <lars.povlsen@microchip.com>
+
+description: |
+ By using a serial interface, the SIO controller significantly extend
+ the number of available GPIOs with a minimum number of additional
+ pins on the device. The primary purpose of the SIO controllers is to
+ connect control signals from SFP modules and to act as an LED
+ controller.
+
+properties:
+ $nodename:
+ pattern: "gpio"
+
+ compatible:
+ enum:
+ - microchip,sparx5-sgpio
+ - mscc,ocelot-sgpio
+ - mscc,luton-sgpio
+
+ clocks:
+ maxItems: 1
+
+ gpio-controller: true
+
+ '#gpio-cells':
+ description: GPIO consumers must specify four arguments, first the
+ port number, then the bit number, then a input/output flag and
+ finally the GPIO flags (from include/dt-bindings/gpio/gpio.h).
+ The dt-bindings/gpio/mchp-sgpio.h file define manifest constants
+ PIN_INPUT and PIN_OUTPUT.
+ const: 4
+
+ gpio-ranges:
+ maxItems: 1
+
+ microchip,sgpio-port-ranges:
+ description: This is a sequence of tuples, defining intervals of
+ enabled ports in the serial input stream. The enabled ports must
+ match the hardware configuration in order for signals to be
+ properly written/read to/from the controller holding
+ registers. Being tuples, then number of arguments must be
+ even. The tuples mast be ordered (low, high) and are
+ inclusive. Arguments must be between 0 and 31.
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ minItems: 2
+ maxItems: 64
+
+ microchip,sgpio-frequency:
+ description: The sgpio controller frequency (Hz). This dictates
+ the serial bitstream speed, which again affects the latency in
+ getting control signals back and forth between external shift
+ registers. The speed must be no larger than half the system
+ clock, and larger than zero.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 1
+ default: 12500000
+
+required:
+ - compatible
+ - clocks
+ - gpio-controller
+ - '#gpio-cells'
+ - gpio-ranges
+ - microchip,sgpio-port-ranges
+
+examples:
+ - |
+ sgpio2: gpio@1101036c {
+ compatible = "microchip,sparx5-sgpio";
+ pinctrl-0 = <&sgpio0_pins>;
+ pinctrl-names = "default";
+ reg = <0x1101036c 0x100>;
+ clocks = <&sys_clk>;
+ gpio-controller;
+ gpio-ranges = <&sgpio0 0 0 192>;
+ #gpio-cells = <4>;
+ microchip,sgpio-port-ranges = <0 0 16 18 28 31>;
+ microchip,sgpio-frequency = <25000000>;
+ };
diff --git a/include/dt-bindings/gpio/mchp-sgpio.h b/include/dt-bindings/gpio/mchp-sgpio.h
new file mode 100644
index 000000000000..61b8aa75d870
--- /dev/null
+++ b/include/dt-bindings/gpio/mchp-sgpio.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * This header provides constants for binding the Microchip SGPIO
+ * driver.
+ *
+ */
+
+#ifndef _DT_BINDINGS_GPIO_MCHP_SGPIO_H
+#define _DT_BINDINGS_GPIO_MCHP_SGPIO_H
+
+#include <dt-bindings/gpio/gpio.h>
+
+/* mchp-sgpio specific pin type defines */
+#undef PIN_OUTPUT
+#undef PIN_INPUT
+#define PIN_OUTPUT 0
+#define PIN_INPUT 1
+
+#endif
--
2.27.0
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