1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 $id: http://devicetree.org/schemas/pinctrl/renesas,rza1-ports.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Renesas RZ/A1 combined Pin and GPIO controller
10 - Jacopo Mondi <jacopo+renesas@jmondi.org>
11 - Geert Uytterhoeven <geert+renesas@glider.be>
14 The Renesas SoCs of the RZ/A1 family feature a combined Pin and GPIO
15 controller, named "Ports" in the hardware reference manual.
16 Pin multiplexing and GPIO configuration is performed on a per-pin basis
17 writing configuration values to per-port register sets.
18 Each "port" features up to 16 pins, each of them configurable for GPIO
19 function (port mode) or in alternate function mode.
20 Up to 8 different alternate function modes exist for each single pin.
25 - const: renesas,r7s72100-ports # RZ/A1H
27 - const: renesas,r7s72101-ports # RZ/A1M
28 - const: renesas,r7s72100-ports # fallback
29 - const: renesas,r7s72102-ports # RZ/A1L
43 Each port of the r7s72100 pin controller hardware is itself a GPIO
45 Different SoCs have different numbers of available pins per port, but
46 generally speaking, each of them can be configured in GPIO ("port") mode
48 Describe GPIO controllers using sub-nodes with the following properties.
69 - $ref: pincfg-node.yaml#
70 - $ref: pinmux-node.yaml#
73 A pin multiplexing sub-node describes how to configure a set of (or a
74 single) pin in some desired alternate function mode.
75 A single sub-node may define several pin configurations.
76 A few alternate function require special pin configuration flags to be
77 supplied along with the alternate function configuration number.
78 The hardware reference manual specifies when a pin function requires
79 "software IO driven" mode to be specified. To do so use the generic
80 properties from the <include/linux/pinctrl/pinconf_generic.h> header
81 file to instruct the pin controller to perform the desired pin
82 configuration operation.
83 The hardware reference manual specifies when a pin has to be configured
84 to work in bi-directional mode and when the IO direction has to be
85 specified by software. Bi-directional pins must be managed by the pin
86 controller driver internally, while software driven IO direction has to
87 be explicitly selected when multiple options are available.
92 Integer array representing pin number and pin multiplexing
94 When a pin has to be configured in alternate function mode, use
95 this property to identify the pin by its global index, and provide
96 its alternate function configuration number along with it.
97 When multiple pins are required to be configured as part of the
98 same alternate function they shall be specified as members of the
99 same argument list of a single "pinmux" property.
100 Helper macros to ease assembling the pin index from its position
101 (port where it sits on and pin number) and alternate function
102 identifier are provided by the pin controller header file at:
103 <include/dt-bindings/pinctrl/r7s72100-pinctrl.h>
104 Integers values in "pinmux" argument list are assembled as:
105 ((PORT * 16 + PIN) | MUX_FUNC << 16)
114 additionalProperties: false
120 additionalProperties:
121 $ref: "#/additionalProperties/anyOf/0"
125 #include <dt-bindings/pinctrl/r7s72100-pinctrl.h>
126 pinctrl: pinctrl@fcfe3000 {
127 compatible = "renesas,r7s72100-ports";
129 reg = <0xfcfe3000 0x4230>;
132 * A GPIO controller node, controlling 16 pins indexed from 0.
133 * The GPIO controller base in the global pin indexing space is pin
134 * 48, thus pins [0 - 15] on this controller map to pins [48 - 63]
135 * in the global pin indexing space.
140 gpio-ranges = <&pinctrl 0 48 16>;
144 * A serial communication interface with a TX output pin and an RX
146 * Pin #0 on port #3 is configured as alternate function #6.
147 * Pin #2 on port #3 is configured as alternate function #4.
149 scif2_pins: serial2 {
150 pinmux = <RZA1_PINMUX(3, 0, 6)>, <RZA1_PINMUX(3, 2, 4)>;
155 * I2c master: both SDA and SCL pins need bi-directional operations
156 * Pin #4 on port #1 is configured as alternate function #1.
157 * Pin #5 on port #1 is configured as alternate function #1.
158 * Both need to work in bi-directional mode, the driver must manage
162 pinmux = <RZA1_PINMUX(1, 4, 1)>, <RZA1_PINMUX(1, 5, 1)>;
167 * Multi-function timer input and output compare pins.
171 * Configure TIOC0A as software driven input
172 * Pin #0 on port #4 is configured as alternate function #2
173 * with IO direction specified by software as input.
176 pinmux = <RZA1_PINMUX(4, 0, 2)>;
181 * Configure TIOC0B as software driven output
182 * Pin #1 on port #4 is configured as alternate function #1
183 * with IO direction specified by software as output.
186 pinmux = <RZA1_PINMUX(4, 1, 1)>;