1 * Renesas Pin Function Controller (GPIO and Pin Mux/Config)
3 The Pin Function Controller (PFC) is a Pin Mux/Config controller. On SH73A0,
4 R8A73A4 and R8A7740 it also acts as a GPIO controller.
12 - compatible: should be one of the following.
13 - "renesas,pfc-emev2": for EMEV2 (EMMA Mobile EV2) compatible pin-controller.
14 - "renesas,pfc-r8a73a4": for R8A73A4 (R-Mobile APE6) compatible pin-controller.
15 - "renesas,pfc-r8a7740": for R8A7740 (R-Mobile A1) compatible pin-controller.
16 - "renesas,pfc-r8a7778": for R8A7778 (R-Mobile M1) compatible pin-controller.
17 - "renesas,pfc-r8a7779": for R8A7779 (R-Car H1) compatible pin-controller.
18 - "renesas,pfc-r8a7790": for R8A7790 (R-Car H2) compatible pin-controller.
19 - "renesas,pfc-r8a7791": for R8A7791 (R-Car M2-W) compatible pin-controller.
20 - "renesas,pfc-r8a7793": for R8A7793 (R-Car M2-N) compatible pin-controller.
21 - "renesas,pfc-r8a7794": for R8A7794 (R-Car E2) compatible pin-controller.
22 - "renesas,pfc-sh73a0": for SH73A0 (SH-Mobile AG5) compatible pin-controller.
24 - reg: Base address and length of each memory resource used by the pin
25 controller hardware module.
29 - #gpio-range-cells: Mandatory when the PFC doesn't handle GPIO, forbidden
30 otherwise. Should be 3.
32 - interrupts-extended: Specify the interrupts associated with external
33 IRQ pins. This property is mandatory when the PFC handles GPIOs and
34 forbidden otherwise. When specified, it must contain one interrupt per
35 external IRQ, sorted by external IRQ number.
37 The PFC node also acts as a container for pin configuration nodes. Please refer
38 to pinctrl-bindings.txt in this directory for the definition of the term "pin
39 configuration node" and for the common pinctrl bindings used by client devices.
41 Each pin configuration node represents a desired configuration for a pin, a
42 pin group, or a list of pins or pin groups. The configuration can include the
43 function to select on those pin(s) and pin configuration parameters (such as
44 pull-up and pull-down).
46 Pin configuration nodes contain pin configuration properties, either directly
47 or grouped in child subnodes. Both pin muxing and configuration parameters can
48 be grouped in that way and referenced as a single pin configuration node by
51 A configuration node or subnode must reference at least one pin (through the
52 pins or pin groups properties) and contain at least a function or one
53 configuration parameter. When the function is present only pin groups can be
54 used to reference pins.
56 All pin configuration nodes and subnodes names are ignored. All of those nodes
57 are parsed through phandles and processed purely based on their content.
59 Pin Configuration Node Properties:
61 - renesas,pins : An array of strings, each string containing the name of a pin.
62 - renesas,groups : An array of strings, each string containing the name of a pin
65 - renesas,function: A string containing the name of the function to mux to the
66 pin group(s) specified by the renesas,groups property
68 Valid values for pin, group and function names can be found in the group and
69 function arrays of the PFC data file corresponding to the SoC
70 (drivers/pinctrl/sh-pfc/pfc-*.c)
72 The pin configuration parameters use the generic pinconf bindings defined in
73 pinctrl-bindings.txt in this directory. The supported parameters are
74 bias-disable, bias-pull-up and bias-pull-down.
80 On SH73A0, R8A73A4 and R8A7740 the PFC node is also a GPIO controller node.
84 - gpio-controller: Marks the device node as a gpio controller.
86 - #gpio-cells: Should be 2. The first cell is the GPIO number and the second
87 cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>. Only the
88 GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported.
90 The syntax of the gpio specifier used by client nodes should be the following
91 with values derived from the SoC user manual.
93 <[phandle of the gpio controller node]
94 [pin number within the gpio controller]
97 On other mach-shmobile platforms GPIO is handled by the gpio-rcar driver.
98 Please refer to Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
99 for documentation of the GPIO device tree bindings on those platforms.
105 Example 1: SH73A0 (SH-Mobile AG5) pin controller node
108 compatible = "renesas,pfc-sh73a0";
109 reg = <0xe6050000 0x8000>,
113 interrupts-extended =
114 <&irqpin0 0 0>, <&irqpin0 1 0>, <&irqpin0 2 0>, <&irqpin0 3 0>,
115 <&irqpin0 4 0>, <&irqpin0 5 0>, <&irqpin0 6 0>, <&irqpin0 7 0>,
116 <&irqpin1 0 0>, <&irqpin1 1 0>, <&irqpin1 2 0>, <&irqpin1 3 0>,
117 <&irqpin1 4 0>, <&irqpin1 5 0>, <&irqpin1 6 0>, <&irqpin1 7 0>,
118 <&irqpin2 0 0>, <&irqpin2 1 0>, <&irqpin2 2 0>, <&irqpin2 3 0>,
119 <&irqpin2 4 0>, <&irqpin2 5 0>, <&irqpin2 6 0>, <&irqpin2 7 0>,
120 <&irqpin3 0 0>, <&irqpin3 1 0>, <&irqpin3 2 0>, <&irqpin3 3 0>,
121 <&irqpin3 4 0>, <&irqpin3 5 0>, <&irqpin3 6 0>, <&irqpin3 7 0>;
124 Example 2: A GPIO LED node that references a GPIO
126 #include <dt-bindings/gpio/gpio.h>
129 compatible = "gpio-leds";
131 gpios = <&pfc 20 GPIO_ACTIVE_LOW>;
135 Example 3: KZM-A9-GT (SH-Mobile AG5) default pin state hog and pin control maps
136 for the MMCIF and SCIFA4 devices
139 pinctrl-0 = <&scifa4_pins>;
140 pinctrl-names = "default";
144 renesas,groups = "mmc0_data8_0", "mmc0_ctrl_0";
145 renesas,function = "mmc0";
148 renesas,groups = "mmc0_data8_0";
149 renesas,pins = "PORT279";
154 scifa4_pins: scifa4 {
155 renesas,groups = "scifa4_data", "scifa4_ctrl";
156 renesas,function = "scifa4";
160 Example 4: KZM-A9-GT (SH-Mobile AG5) default pin state for the MMCIF device
163 pinctrl-0 = <&mmcif_pins>;
164 pinctrl-names = "default";
167 vmmc-supply = <®_1p8v>;